#chromite sand for casting

[tauralindia1]

Mastering Precision and Quality: A Comprehensive Guide to Sand Casting for Your Manufacturing Needs

 In the realm of metal fabrication, sand casting stands as one of the most versatile, cost-effective, and reliable processes for producing complex metal components. Whether you’re in automotive, aerospace, power generation, or general industrial manufacturing, partnering with a specialized sand casting company ensures you receive durable parts that meet exacting specifications. This blog explores the sand casting process, its advantages, material options, quality control measures, and why choosing an experienced partner can transform your production workflow.

1. Understanding the Sand Casting Process

Sand casting, sometimes called sand molded casting, involves creating a mold cavity in a specially formulated sand mixture, then pouring molten metal into that cavity to form the desired shape. The core steps include:

Pattern Creation: A pattern—made from wood, plastic, or metal—mimics the final part’s geometry.

Mold Preparation: The pattern is placed in a flask and packed tightly with a mixture of silica sand and a binding agent (often clay or chemical resin).

Core Placement (if needed): For internal cavities or undercuts, preformed sand cores are positioned inside the mold.

Mold Assembly: Once the sand sets, the two halves (cope and drag) are assembled around the pattern or core.

Metal Pouring: Molten metal—aluminum, steel, brass, bronze, or other alloys—is poured into the mold via sprues and runners.

Cooling and Shakeout: After solidification, the sand mold is broken away (shaken out), revealing the raw casting.

Cleaning and Finishing: Excess metal (sprues, runners) is removed, and the part undergoes cleaning, shot blasting, grinding, or machining for final dimensions and surface finish.

This time-tested method accommodates part sizes from a few ounces to several tons, making it ideal for both prototypes and high-volume production runs.

2. Key Advantages of Sand Casting

Cost Efficiency

Sand casting requires minimal capital equipment compared to die casting or investment casting. Patterns are relatively inexpensive to produce, and the sand can be reclaimed and reused, driving down per-part costs—especially for low to medium volumes.

Design Flexibility

Complex geometries, internal passages, and thin walls are achievable through core placement and careful mold design. Sand casting accommodates changes quickly; altering a wooden or plastic pattern is faster and more affordable than retooling metal dies.

Material Versatility

Virtually any metal that can be melted and poured is suitable for sand casting. Common materials include:

Aluminum Alloys: Lightweight, corrosion-resistant, excellent thermal and electrical conductivity.

Gray and Ductile Iron: High strength, wear resistance, and damping properties.

Carbon and Alloy Steels: Robust mechanical properties for heavy-duty applications.

Bronze and Brass: Good machinability, corrosion resistance, and aesthetic appeal.

Scalability

Sand casting is equally effective for one-off prototypes or large batches of identical parts. Production capacity can be quickly ramped up or down, providing agility for customers with fluctuating demand.

3. Critical Material Considerations

Selecting the right metal alloy and sand mixture has a direct impact on casting quality and mechanical performance:

Sand Mixtures: Silica sand is most common, but zircon and chromite sands can be used for specialized high-temperature applications. Binder types (clay, chemically bonded, or oil bonded) are chosen based on mold strength and permeability requirements.

Alloy Selection: Match alloy properties to end-use conditions. For high-temperature environments, heat-resistant steels or nickel alloys may be preferable. For lightweight housings, aluminum or magnesium alloys excel.

Mold Coatings: Applying a refractory coating inside the mold cavity reduces metal penetration, improves surface finish, and facilitates shakeout.

A knowledgeable sand casting partner works with you to optimize these parameters, ensuring each casting meets performance and cost targets.

4. Ensuring Quality Through Rigorous Control

High-precision components demand stringent quality management throughout the casting process:

Pattern and Mold Inspection: Regular checks for pattern wear, mold integrity, and core accuracy prevent dimensional deviations.

Metallurgical Testing: Spectrographic analysis, tensile testing, and hardness measurements confirm alloy composition and mechanical properties.

Non-Destructive Evaluation (NDE): Techniques like X-ray, ultrasonic testing, and dye penetrant inspection detect internal defects or surface cracks.

Dimensional Verification: Coordinate measuring machines (CMMs) and laser scanners compare cast parts to CAD models, ensuring tight tolerances.

Process Documentation: Detailed records of sand properties, pouring temperatures, and cycle times facilitate traceability and continuous improvement.

By embedding quality checks at every stage, a reputable sand casting company minimizes scrap, rework, and delivery delays.

5. Applications Across Industries

Sand casting’s combination of flexibility and robustness has earned its place in diverse sectors:

Automotive: Engine blocks, transmission housings, steering knuckles, brake components.

Aerospace: Structural brackets, housings, turbine components (in specialized alloys).

Oil & Gas: Valve bodies, pump housings, flange fittings.

Construction Equipment: Excavator arms, pump housings, heavy-duty gears.

Agriculture Machinery: Tractor parts, hydraulic pump blocks, gearbox housings.

Industrial Machinery: Gearboxes, pump casings, compressor components.

Each application benefits from the process’s ability to produce durable, custom-shaped metal parts at competitive costs.

6. Choosing the Right Sand Casting Partner

When selecting a sand casting supplier, consider these criteria:

Experience and Expertise: Look for a company with decades of hands-on casting experience and a proven track record in your industry.

Technical Capabilities: Ensure they offer end-to-end services—pattern making, mold preparation, casting, heat treatment, machining, and finishing—under one roof.

Certifications: ISO 9001, AS9100 (aerospace), or API certifications (oil & gas) demonstrate commitment to quality and regulatory compliance.

Capacity and Lead Times: Verify their ability to handle your required volumes and delivery schedules.

Customer Collaboration: A partner who offers design for manufacturability (DFM) guidance can help optimize your parts for casting, reducing cost and lead time.

Building a collaborative relationship with your sand caster ensures open communication, problem-solving, and shared commitment to project success.

7. Sustainable Practices in Sand Casting

Modern foundries increasingly embrace eco-friendly initiatives:

Sand Reclamation: Advanced thermal or mechanical reclamation systems recover over 90% of used molding sand.

Energy Efficiency: Upgraded furnaces and heat recovery units reduce fuel consumption and emissions.

Waste Management: Recycling metal scrap and safe disposal of spent binders minimize environmental impact.

Green Binders: Water-based or biodegradable binder systems eliminate harmful volatile organic compounds (VOCs).

These sustainable measures not only reduce operational costs but also align with corporate social responsibility goals and regulatory requirements.

8. Case Study: From Prototype to Production

Consider a manufacturer of agricultural pump housings seeking to transition from low-volume prototypes to a production run of 5,000 units per year. An experienced sand casting partner worked closely to:

Refine the CAD Model: Added uniform wall thickness and optimized gating to improve metal flow.

Develop Durable Patterns: CNC-machined aluminum patterns ensured consistent mold accuracy for thousands of pours.

Implement Quality Gates: In-process inspections at mold setup, pour, and post-shakeout maintained a defect rate below 1%.

Integrate Secondary Machining: In-house CNC machining and pressure testing delivered ready-to-install housings.

The result: a reliable supply of pump housings that met stringent dimensional and performance requirements, with a 20% cost reduction compared to alternative processes.

9. Maximizing Your ROI with Sand Casting

To get the most value from sand casting:

Early Involvement: Engage your casting partner during the design phase for DFM insights.

Batch Planning: Combine production runs for multiple part numbers to leverage economies of scale.

Inventory Management: Use just-in-time deliveries or blanket orders to balance lead times and inventory carrying costs.

Continuous Improvement: Regularly review casting yields, scrap rates, and customer feedback to identify process enhancements.

Treating your sand casting supplier as a strategic collaborator will unlock process efficiencies, cost savings, and superior part performance.

10. Conclusion

Sand casting remains an indispensable process for manufacturing robust, intricately shaped metal components across countless industries. Its adaptability to various materials, cost-effective tooling, and scalability from prototypes to high-volume runs make it a cornerstone of modern fabrication. Partnering with a seasoned sand casting company—one that offers comprehensive capabilities, rigorous quality control, and sustainable practices—ensures you receive parts that meet your specifications, budget, and timeline.

Whether you’re exploring a new product design or scaling up production, the right sand casting partner can provide the expertise and resources to turn your vision into reality. Embrace the proven strengths of sand casting and position your business for success with precision-engineered metal components that stand the test of time.

[zhenjin-refractory0211]

What is the composition of magnesia chrome brick?

Magnesia chrome bricks use high-quality sintered magnesia and chromite (Cr203 30%-15%, CaO 1%-5%) as the main raw materials. The production process of magnesia-chrome bricks is roughly similar to that of magnesia bricks. Non-fired magnesia chrome bricks use inorganic magnesium salt solution as a binder. During the firing process, due to the loosening effect caused by the expansion of spinel when MgO reacts with CrO3, Al2O3 or iron oxides, pre-synthesized magnesia sand can be used to make bricks, which must be fired in an oxidizing atmosphere above 1600 ° C. become. If the nature of the atmosphere changes, Fe203 in chromite is affected by the redox reaction to form iron oxides of various valences. At the same time, Cr203 is also reduced to produce different valence compounds. Under repeated reactions, bricks will be damaged, so products with high MgO and low Cr2O3 should be used as much as possible.

According to the raw materials and process characteristics of the products, it can be divided into fused-cast magnesia-chrome bricks, directly bonded magnesia-chrome bricks, silicate-bonded magnesia-chrome bricks, rebonded magnesia-chrome bricks, semi-rebonded magnesia-chrome bricks, pre-reacted magnesia-chrome bricks and non-reactive magnesia-chrome bricks. Burnt magnesia chrome brick. The following is an introduction to the composition of different types of magnesia-chrome bricks:

Composition of fused cast magnesia-chrome bricks

Fused-cast magnesia-chrome bricks are refractory products made from magnesia and chrome ore through electric melting and casting. The production process of fused cast magnesia-chrome bricks is shown in Figure 1. It is characterized by large and isolated pores, dense products, high strength, corrosion resistance, and sensitivity to temperature changes. The chemical properties of magnesia-chrome bricks are alkaline. Compared with magnesia bricks and slabs, they have good thermal shock resistance, stable volume at high temperatures, and high load softening temperature.

Directly combine the components of magnesia-chrome bricks

Directly bonded magnesia-chrome bricks are made by combining sintered magnesia and chromite. It is required that the SiO2 content of the raw material is low, and it is fired at a high temperature above 1700 ° C to form a direct bond between periclase and chromite particles. The typical physical and chemical properties of directly bonded magnesia-chrome bricks are: MgO 82.61%, Cr2O3 8.72%, SiO2 2.02%, apparent porosity 15%, and bulk density 3.08g/cm3. The compressive strength is 59.8MPa, the load softening temperature is 1765°C, the thermal shock resistance is 1100°C (water-cooled) 14 times, and the flexural strength is 8.33MPa.

Composition of silicate-bonded magnesia-chrome bricks

Silicate-bonded magnesia-chrome bricks are made by sintering magnesia and chrome ore as raw materials, blending them in appropriate proportions and firing them at high temperature. The mineral composition of the product is periclase, spinel and a small amount of silicate. The production of silicate-bonded magnesia-chrome bricks uses brick-making magnesia and general refractory grade chrome ore as raw materials, Si02<4% in magnesia, Mg0>90%, Cr203 in chromium ore 32%-45%, and sulfite as the main material. After binder, kneading and forming, it is fired at about 1600°C. In order to prevent abnormal expansion of products during firing, a weak oxidizing atmosphere must be maintained in the kiln. The chemical composition of the product: Si02 2.98%-4.50%, MgO 61.75%-72.69%, Cr203 10.04%-14.90%. Physical properties: apparent porosity 18%-21%, normal temperature compressive strength 36.1-50.OMPa, load softening temperature 1600-1640℃.

Combining the composition of magnesia-chrome bricks

Recombined magnesia-chrome bricks are made by sintering fused magnesia-chrome sand as raw material. Fused magnesia-chrome sand has poor sinterability, and the product is a fine-grained matrix with uniform distribution of pores and tiny cracks. It is more sensitive to sudden temperature changes than fused cast bricks. The high-temperature performance of the product is between the fused cast brick and the direct bonded brick. The typical physical and chemical properties of combined magnesia-chrome bricks are: MgO 68%, Cr203 15%, SiO2 3%, apparent porosity 14%. Bulk density 3.20g/cm3, compressive strength 52.8MPa, load softening temperature 1740℃, flexural resistance Strength 7.86MPa.

Composition of semi-recombined magnesia-chrome bricks

Semi-recombined magnesia-chrome bricks are made from fused magnesia-chrome sand and magnesia, chromite or pre-reacted magnesia-chrome sand. The products have some characteristics of recombined magnesia-chrome bricks and directly combined magnesia-chrome bricks or pre-reaction magnesia-chrome bricks. The typical physical and chemical properties of semi-recombined magnesia-chrome bricks are: MgO 71.58%, Cr2O3 16.45%, SiO2 2.75%, apparent porosity 13%. Compressive strength 46.7MPa, load softening temperature 1760℃, flexural strength 9.09MPa.

Composition of pre-reaction magnesia-chrome bricks

Pre-reacted magnesia-chrome bricks are made of all or part of pre-reacted magnesia-chrome sand. The production cost is lower than that of recombined magnesia-chrome bricks. The partial reaction between magnesia and chromite is completed when the clinker is calcined, so the apparent porosity of the product is lower than that of the directly bonded brick with the same composition, and the high temperature strength is high. The typical composition of pre-reaction magnesia-chrome bricks is: MgO 62.8%, Cr2O3 15.3%, SiO2 3.25%, apparent porosity 17%, compressive strength 51.3MPa, load softening temperature 1650℃.

[xinmichangxingrefractory-blog]

The application of chromite sand

Chromite ore fines has good increasing friction effect in low and high temperature, plays a dual role too. Added to rubber can play a good role of increasing friction, and do not scratch the duality and noise. In the friction material commonly used in chromite fines Cr203, content of 25%-40%, the higher Cr203 content, increasing friction effect is bigger. Use should pay attention to controlling the amount and particle size. Proper dosage should not exceed 7%, particle fineness more than 200 projects. Excessive dosage and coarse grain size can improve the friction coefficient but also will cause friction increases obviously.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source:The application of chromite sand Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd Email: sales1@chinafirebrick.com Website:http://www.chinafirebrick.com/

[ecastins-blog]

This process design can get a good internal organization structure

The dry sand commonly used in lost foam casting is quartz sand (density 2.65g / cm3, refractoriness 1713C), particle size 0.5-3.3mm, sieve number 40-60 mesh; also useful olivine sand (density 3.2-3.6g / cm3 , The refractoriness is 1750C), the latter is slightly better than the former, and the heat storage is also slightly larger due to the higher density. However, these sands are not enough to obtain a dense structure of the anti-wear castings: because of poor thermal conductivity, the solidification time of the casting is long and the structure is coarse and loose. The liner produced by quartz sand in Tengfei Foundry, Yutian County, Hebei Province T coupler plug is 5% lighter than the liner produced by tidal mold sand of the same geometric size, so the wear resistance is very poor. Fearing to spend money to change other sand types, had to follow the tidal sand production.

 So, whether the use of lost foam casting can produce high-quality anti-wear castings? The answer is yes! First of all, how to choose or are willing to choose a special sand with good thermal conductivity. Such as chromite sand (density 4.0-4.8g / cm3, refractoriness> 1900C), its thermal conductivity or heat storage is 3-4 times that of quartz sand, second only to zircon sand (density 4.6g / cm3, Refractoriness 2430C) and metal type. Liaoning Anshan Yongxin Wear-resistant Casting Factory uses chromite sand to produce grinding balls (as shown). The hardness of low-chromium alloy 0100 grinding balls is above HRc50. Of course, the effect is good. Under the other conditions are the same, the process design of the pouring system is correct or not, which affects the inherent quality of the casting, which affects the use of anti-wear castings. However, how to properly design the pouring system is the second feature that should be paid attention to in the lost foam casting anti-wear parts. The molten metal is injected from top to bottom, and the molten metal first reaches the bottom. During a relatively long sinking process, the temperature drops and solidifies first. The whole casting is solidified in sequence. Those who solidify first can get the high-temperature metal liquid supplement in the upper part; those who solidify after the item can get the high-temperature metal liquid supplement in the gate or the blanking riser. It is a schematic diagram of the casting system of the jaw plate of Linjiatai Foundry in Dandong; it is a schematic diagram of the casting system of the large plate hammer of Urumqi Hongda Cast Steel Factory. 

This process design can get a good internal organization structure. Uses a hot riser, the solidification sequence is that the casting is solidified first, and then solidified after the riser. The casting can be fully compensated during the solidification shrinkage process, so as to obtain a dense casting. A blank riser is a type of hot riser. It is a schematic diagram of the use of thermal risers for large gear castings in Tangshan Cast Steel Plant. 3. The inflow runner is set on the side. For castings such as lining, it is also a good process design to set the inflow runner on the side, but it should be located at 1/2 of the height of the casting or slightly above. The casting has a certain angle of inclination. A vent (or feeding) riser is set at the highest point. It is a schematic diagram of casting of lining plate of Yunnan Malong Cast Steel Factory. This process is conducive to the solidification of the casting layer by layer from the lower part to the upper part. The upper part of the in-gate is conducive to shrinking the lower part. The riser is located at the highest point to benefit exhaust and retraction. 

[parfect-steel]

Water glass casting components

Sodium silicate sand CO2 is a commonly used core molding process in some workshops. This method can be used for mass production and single-piece small batch production, as well as large and small cores.How to make water glass casting components？

Water glass is a general term for various polysilicate aqueous solutions. Commonly used incasting components is sodium (Na2O·mSiO2) water glass, followed by potassium (K2O·mSiO2) water glass, in addition to lithium (Li2O·mSiO2) water glass, potassium sodium (mK2O·Na2O·mSiO2) water glass and quaternary ammonia Salt (quaternary ammonium salt) water glass, etc. Among them, because soda water glass is the most widely used, we mainly introduce it. Soda water glass has several important parameters, which directly affect its chemical and physical properties, and also directly affect the use of sodium water glass as a binder. The process performance of sodium silicate sand is the modulus, density, solid content and viscosity of sodium silicate.

Sodium sodium silicate sand CO2 is a commonly used core molding process in some workshops. This method can not only be used for mass production and single-piece small batch production, but also for large and small cores. At present, the widely used CO2-sodium water glass sand is mostly made of pure artificial (or natural) quartz sand added with 4.5% to 8.0% sodium water glass. For tens of tons of large steel casting sand molds (cores) with high quality requirements, it is more advantageous to use surface sand or some special sand such as magnesia sand, chromite sand, olivine sand and zircon sand instead of quartz sand. Some require the sodium silicate sand to have certain wet strength and plasticity, so that it can be hardened by blowing CO2 after demoulding. You can add 1% to 3% bentonite (mass fraction) or 3% to 6% ordinary clay sand (mass fraction). ) Or add part of the clay sand. In order to improve sand production, some molding sands are also added with 1.5% sawdust (mass fraction) or 5% asbestos sand (mass fraction) or other additives.

Parfect Steel Co., Ltd. is a leading forged components manufacturer, focusing on casting and casting mechanical parts. With more than 30 years of successful experience, our products are exported to North America, Australia, South Korea, etc. With high quality and low price, we sincerely look forward to cooperating with you.

[scmesue-blog]

46%min Cr2O3 Chromium Ore Sand Manufacturer Chromite sand use for casting coating

[researchkraft19]

Aluminum Sand Casting Market Regulations and Competitive Landscape Outlook to 2020-2027

The Global Aluminum Sand Casting Market has enlisted a noteworthy CAGR during the most recent decade. It is relied upon to arrive at higher yearly development in the imminent years. Strength, hearty monetary framework, crude material opulence, taking off worldwide Aluminum Sand Casting request are boosting market advancement. So also, mechanical headways, advancements, expanding industrialization, and urbanization in the creating and created areas are probably going to maintain the Aluminum Sand Casting market income during forecast 2020-2027

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Market Research Explore distributed a broad investigation of the worldwide Aluminum Sand Casting market thinking about different significant components of the market. The exploration study includes precise and credible evaluations of the past just as the future pace of the market. The report contains indispensable assessments dependent on creation, deals volume, income, and yearly development rates. The report likewise expounds on current market contention, industry condition, fragments, and driving rivals in the worldwide Aluminum Sand Casting market. It helps key players, partners, industry specialists, analysts, and friends authorities in increasing profound understanding of the market.

The worldwide Aluminum Sand Casting advertise has been separated into a few essential sections, for example, item types, applications, areas, and end-clients. Moreover, it investigates locales including North America, Europe, South America, the Middle East, Asia, and the remainder of the world while performing provincial examination. The division investigation helps key players correctly focusing on the real market size and choosing suitable sections for their Aluminum Sand Casting organizations.

The most significant players coated in global Aluminum Sand Casting market report:

Alcoa, Dynacast, Hitachi Metals, Minerals Technologies, Precision Castparts, Rajshi Industries, Supreme Metals, FSE Foundry, Castwel Foundries, MRT Castings, Akiba Die Casting, Dynamic Castings, Non Ferrous Cast Alloys, Samsung Nonferrous Metal, Quality Non-Ferrous Foundry, Nap Engineering Works, Alumalloy Metalcastings, Metalodlew SA, Gamma Foundries, Non-Ferrous Metal Works, CITIC Dicastal, Tamboli Castings Limited

Types is divided into:

Silica Sand

Olivine Sand

Chromite Sand

Zircon Sand

Chamotte Sand

Others

Applications is divided into:

Automotive

Machinery Manufacturing

Aerospace & Defense

Piping

Metal Crafts

Others

Global Aluminum Sand Casting Market Regional Segmentation:

North America (U.S., Canada, Mexico) Europe (Germany, U.K., France, Italy, Russia, Spain, etc.) Asia-Pacific (China, India, Japan, Southeast Asia, etc.) South America (Brazil, Argentina, etc.) Middle East & Africa (South Africa, Saudi Arabia, etc.)

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[gustlostwaxy-blog]

The foundry-related characteristics

Low linear expansion. Linear expansion is one of the factors that causes sand inclusion in casting mould.It is inactive, therefore it doesn’t react with metallic oxide and won’t be wetted by molten manganese steel.

The foundry-related characteristics of chromite sand .Excellent chilling performance, it can affect temperature gradient without decreasing heat cracks, promote directional solidification without using chills;. Thereforechromite sandcan be used to mix green sand mold for heavy casting;.No harm for human health. .Chromite sandcan be successfully used with manganese steel casting.

Through fine grain sintering, with chilling performance and high residue Lost Wax Casting hot strength, chromite sand can eliminate metal penetration;.It is universal, can be used with all kinds of binding agent;6. If the painting of casting mould is good and with low silicon oxide, there won’t be iron olivine reaction;

[expomahal-blog]

Salon of Accessories & Fashionable Adornments 2019 at Ukraine(Kiev) 2019-May

machine tool Exhibitors Directory, shipbuilding contact links, construction machinery contact list, rail transportation contact info, heavy machinery Shows, mining machinery Trade Shows, textile machinery contact info, printing machinery business opportunities, general machinery business opportunities, electric power B2C ideas, telecommunication network, petrochemical industry Exhibitors, building hardware B2B Opportunities, kinds of smelting furnace info, automatic pouring machine Meetings, molding line Events, core making center network, sand mixer companies contacts, sand processing equipment Shows, sand reclamation equipment Events, shot blast cleaning equipment contact info, die-casting machine network, precision casting equipment contact list, full mold casting device Exhibitors Directory, various robot companies list, fast molding equipment business ideas, nondestructive testing equipment B2B Opportunities, cleaning environment protection equipment business ideas, foundry resin events, paint Events, foundry pig iron events, ferroalloy events, non-ferrous metal network, insulated feeder events, filter directory, foundry coke Exhibitions, silica sand contact list, precoated sand business, chromite sand Shows, testing machine of mold sand machine property companies contacts, direct-reading spectrometer Meetings, mechanics performance tester Fairs, three coordinate measuring machine. B2C opportunities, petrochemical B2B ideas, construction companies contacts list, agricultural machinery Exhibitions, and industry leaders business, new product research and development personnel Events, dealers and traders supporting industries Fairs, experts directory, quality testing and certification personnel business opportunities, aerospace B2C opportunities, engineering company are the target visitors on this show. business contacts 2019, May, Germany, Bad Pyrmont

Herbstliche Landpartie Bad Pyrmont 2019 at Germany(Bad Pyrmont) 2019-May

Herbstliche Landpartie Bad Pyrmont 2019 trade show event mainly focuses on:

machine tool B2C ideas, shipbuilding events, construction machinery Expos, rail transportation Trade Fairs, heavy machinery Meetings, mining machinery contact links, textile machinery Exhibitors, printing machinery Events, general machinery companies contacts, electric power companies list, telecommunication Shows, petrochemical industry B2B Opportunities, building hardware business opportunities, kinds of smelting furnace Fairs, automatic pouring machine Meetings, molding line contacts list, core making center events, sand mixer Exhibitors Directory, sand processing equipment B2B ideas, sand reclamation equipment Exhibitors, shot blast cleaning equipment companies, die-casting machine contact links, precision casting equipment B2B ideas, full mold casting device contact info, various robot contact info, fast molding equipment Shows, nondestructive testing equipment business opportunities, cleaning environment protection equipment business, foundry resin Exhibitors, paint B2B ideas, foundry pig iron Expos, ferroalloy B2B Opportunities, non-ferrous metal events, insulated feeder Exhibitors Directory, filter B2B ideas, foundry coke contact list, silica sand Exhibitors, precoated sand Meetings, chromite sand network, testing machine of mold sand machine property companies contacts, direct-reading spectrometer Exhibitors, mechanics performance tester business, three coordinate measuring machine. contact list, petrochemical Exhibitors, construction companies B2B ideas, agricultural machinery directory, and industry leaders Trade Fairs, new product research and development personnel info, dealers and traders supporting industries B2B Opportunities, experts info, quality testing and certification personnel Exhibitors, aerospace companies list, engineering company are the target visitors on this show. events

related products/services/industry/business. This trade show opens top business opportunities to exhibit products and services from machine tool contact list, shipbuilding Business events, construction machinery Business events, rail transportation Events, heavy machinery Events, mining machinery info, textile machinery Exhibitors, printing machinery info, general machinery Exhibitors, electric power Exhibitors, telecommunication Expos, petrochemical industry companies, building hardware contacts list, kinds of smelting furnace B2C opportunities, automatic pouring machine Shows, molding line info, core making center contact list, sand mixer contact info, sand processing equipment companies, sand reclamation equipment companies list, shot blast cleaning equipment business opportunities, die-casting machine B2B Opportunities, precision casting equipment B2C opportunities, full mold casting device B2B ideas, various robot contact info, fast molding equipment contact info, nondestructive testing equipment events, cleaning environment protection equipment companies contacts, foundry resin Trade Shows, paint Exhibitors, foundry pig iron Shows, ferroalloy contact links, non-ferrous metal Expos, insulated feeder network, filter companies contacts, foundry coke B2B ideas, silica sand Exhibitors, precoated sand Trade Shows, chromite sand companies, testing machine of mold sand machine property network, direct-reading spectrometer Exhibitors, mechanics performance tester Trade Shows, three coordinate measuring machine. events, petrochemical B2C opportunities, construction companies contacts list, agricultural machinery contacts list, and industry leaders contact info, new product research and development personnel Events, dealers and traders supporting industries Shows, experts Meetings, quality testing and certification personnel Events, aerospace companies, engineering company are the target visitors on this show. Exhibitors industry.

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We help you to grow your business by providing the required contact details of all companies participating in this event and you can download the same data in excel format using the above links. Location of the Event:Germany(Bad Pyrmont) Year-Month:2019-May Official Website:Event Website source https://www.expomahal.com/2019/07/salon-of-accessories-fashionable.html

[ruizhirefractory]

Furnace lining material and molding material used for smelting high manganese steel in intermediate frequency furnace

We all know that high manganese steel easy to work hardening, which is difficult to process, the vast majority of castings, very small amount of forging processing methods. High manganese steel casting performance is better. The low melting point of steel (about 1400 ℃), steel liquid, solidus temperature interval is small, (about 50 ℃), tundish nozzle low thermal conductivity of steel, so the molten steel flow is good, easy to pour molding. High manganese steel linear expansion coefficient of 1.5 times for the pure iron, carbon steel 2 times, so the casting volume shrinkage and linear high alumina bricks shrinkage are large, prone to stress and crack casting temperature of 1400 + (80- 100) 80-100 to see the situation and the complexity of the casting plant, up to 150. High-manganese steel casting process In the high-energy impact of the working conditions, high manganese gunning mix steel and ultra-high manganese steel casting applications are broad. Many foundries do not have the necessary knowledge to produce such steel castings. Is a brief description of the specific operation for producers of reference. 1, the chemical composition of high manganese steel in accordance with national standards are divided into five grades, the main difference is the carbon content, the range is 0.75% -1.45%. The impact of large, low carbon ramming mass content. Manganese content between 11.0% -14.0%, generally should not be less than 13%. Ultra-high manganese steel is not the national standard, but the manganese content should be greater than 18%. Silicon content of high and low impact on the impact toughness, it should take the lower limit to not more than 0.5% is appropriate. Low phosphorus and magnesia carbon refractory low sulfur is the most basic requirements, due to the high manganese content of natural play desulfurization, it is the most important phosphate, try to make phosphorus less than 0.07%. Chromium is to improve the wear resistance, generally about 2.0%. 2, charge into the furnace material is determined by the chemical composition. The main charge is high quality carbon steel (or ingot), high carbon ferromanganese, medium carbon ferromanganese, high carbon ferrochrome and high manganese steel back to the charge. Here is a reminder of the people think that as long as the chemical composition is appropriate, you can use more with the charge back. This person is harmful. The reason why some plant products of poor quality, are out of this. Not only high-manganese steel, ultra-high manganese steel, all metal castings, must not be too much to use back to the charge, the charge should not be more than 25%. So, what about the excess charge As long as the waste to a minimum, no excess charge back. 3, melting Here focus on the charging sequence, whether in the IF furnace, or electric arc furnace smelting, always smelting carbon steel, and various types of ferromanganese and other precious alloy materials, to be divided into several times, each into the furnace a small, expensive The elements are added at the end to reduce burn. Block should be as small as possible to 50-80mm is appropriate. Melting, the furnace temperature reached 1580-1600 ℃, to deoxidation, dehydrogenation, denitrification, available aluminum wire, can also be used Si-Ca alloy or SiC and other materials. Deoxidizer must be pressed to the depths of the furnace. At this point the metal surface covered with cover agent, cut off the outside air. But also to calm for some time, so that oxides, inclusions have sufficient time to float. However, many enterprises, only aluminum wire or aluminum scrap, and then sprinkle metal surface, and not cover, would not be wasted! During this period, in time to adjust the carbon and manganese to the manganese and carbon content. Before the molten steel is baked, it is necessary to bake the ladle above 400 ℃. In the baked during the V-Fe, Ti-Fe, rare earth and other trace elements to do metamorphic treatment, is to make a crystal refinement of the necessary means, its impact on product performance is essential. 4, charge and molding materials to extend the furnace order, when the distinction between steel and the lining of the property. Manganese steel is alkaline, of course, the use of magnesia lining material. Pounding the lining to turn again and again to change operation. Add lining materials can not be too thick, about 80 cm each time is appropriate, to complete a long time to bake baking. Such as improving production efficiency, I recommend the use of forming crucible, from the demolition furnace ramming into, not 1 hour, you can put into production, while forming the crucible on the benefit of anti-wear furnace. Of course, the length of the furnace and the operator has a great relationship. Many operators like throwing the same athletes, the charge from 34 meters into the furnace outside, not safe and hurt furnace order, the furnace should be placed in the mouth next to the preheat, and then slowly with the clip charge Along the furnace placed in the mouth next to the preheat, and then slowly with the clip along the furnace wall into the furnace. Modeling materials and coatings should also be consistent with the properties of liquid metal, or with ZTE materials (such as chromite sand, corundum, etc.). If you want to get a crystal refinement of the collective, the use of large thermal storage of chromite sand is correct, especially the EPC production plant, with it will overcome the shortcomings of slow cooling. 5, the casting process design Manganese steel is characterized by large solidification shrinkage, heat dissipation is poor, accordingly, in the process of casting shrinkage taken 2.5% -2.7%, casting the more grow up, the more should take the ceiling. Sand and sand core of the concession must be better. Gating system to take open. A plurality of discrete runners are introduced from the thin wall of the casting and have a flat, wide, trumpet-like shape with a cross-sectional area near the casting which is greater than the cross-sectional area associated with the runner so that the molten metal is quickly and smoothly injected into the mold , To prevent the mold temperature difference is too large. Riser diameter is greater than the diameter of the hot section, close to the hot section, the height is 2.5-3.0 times the diameter, must be hot riser or pouring riser, so that sufficient high-temperature liquid metal casting to shrink in the empty space . The sprue, the riser at a high (sand box with 5-8. The slope) is also correct. Pouring as fast as possible low temperature. Once the solidification, to timely loose sand box. Smart designers are always good at using cold iron, including iron in the cold inside the cold iron, which not only refine a crystal, eliminating shrinkage, shrinkage, and improve the process yield, of course, the appropriate dosage and specifications should be considered of. Inner iron to be clean, fusible, the amount of less suitable. The three dimensional dimension of the outer cold iron is a function of 0.6 to 0.7 times the three dimensional dimension of the coolant. Too small does not work, too big cause casting cracking. Casting in the type of long-term insulation, until less than 200 ℃ and then open the box. 6, heat treatment Heat treatment cracking, is the low temperature phase caused by too fast. So the correct operation is below 350 ℃, the heating rate of <80 ℃ / h, 750 ℃ the following, <100 ℃ / h, and have different periods of insulation. To> 750 ℃, the casting was plastic state, you can quickly heat up. To 1050 ℃ according to the thickness of the casting to determine the holding time, and then rose to 1100 ℃ or more. Give the furnace cool down and leave room for water as soon as possible. When the temperature is too slow to heat up, holding time is too short, after baked into the water time interval is too long (not> 0.5min), all of which affect the quality of castings. Water temperature should be <30 ℃, quenching, the water temperature <50 ℃, the water should not be less than 8 times the weight of the casting. Cold water from the pool into the bottom, warm water from the pool top surface outflow. Casting in the pool to keep moving in three directions. 7, cutting and welding Because of poor thermal conductivity of manganese steel, so cut the riser should pay great attention. Casting is best placed in the water, was cutting part of the exposed water, cutting a certain amount of stubble, heat treatment after grinding off. Many plants, welding and welding become inevitable. Selection of austenitic manganese-nickel electrode (D256 or D266 type), specifications slender, φ3.2mm × 350mm, the outer coating is alkaline. Operation using small current, weak arc, a small bead and more welding, and always maintain a low temperature, less heat method of operation. While welding while striking, eliminating stress. Important castings must be inspected. 8, the production considerations Attention to the producers, not only to reduce production costs, but more importantly, no waste, the maximum quality products, and then to maximize the expansion of occupation of market share. This seems to be slow and costly, in fact, fast and provincial, this concept not only recognizes that more important is to do. Third, the use of High manganese steel is designed for heavy industry to provide a use of anti-wear steel, applications include quarrying, mining, mining, coal industry, casting and steel industries. Other First, quarrying, mining, mining and mining industry Gravel, top, hammer, backhoe bucket, conveyor belt, link belt, lifting bucket, quarry truck base, gravel production line, bulldozer, Sandblasting cleaning equipment, waste treatment equipment performance characteristics by anti-wear technology, the material surface can reach 500 - 550 Brinell hardness, continue to maintain the internal Flexibility, surface friction to minimize the available high manganese steel or similar materials for welding, can be acetylene torch cutting, non-magnetic and so on.

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The foundry-related characteristics of chromite sand

It is universal, can be used with all kinds of binding agent;The foundry-related characteristics of chromite sand .Excellent chilling performance, it can affect temperature gradient without decreasing heat cracks, promote directional solidification without using chills;

 If the painting of casting mould is good and with low silicon oxide, there won’t be iron olivine reaction;Through fine grain sintering, with chilling performance and high residue hot strength, chromite sand can eliminate metal penetration;.It is inactive, therefore it doesn’t react with metallic oxide and won’t be wetted by molten manganese steel.

Chromite sandcan be successfully used with manganese steel casting. Dual Phase Steel Castings factory Thereforechromite sandcan be used to mix green sand mold for heavy casting;.Low linear expansion.No harm for human health. Linear expansion is one of the factors that causes sand inclusion in casting mould