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Production process method of high-carbon multi-element alloy casting grinding ball

A technology for alloy casting and casting grinding balls, which is applied in the direction of manufacturing tools, quenching agents, heat treatment process control, etc., can solve the problems of increased cost of chromium alloy casting grinding balls, large investment in production equipment, complex production processes, etc., and achieves reduction of precious metal chromium. content, reducing operating costs, and huge social benefits

Active Publication Date: 2010-02-03
安徽省凤形新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the investment in the production equipment of chrome alloy cast grinding balls is relatively large, and the production process is relatively complicated, which leads to the continuous increase of the cost of chromium alloy cast grinding balls, which brings considerable pressure to the manufacturers and users of grinding balls; another On the one hand, in cement, mining and other industries, the diameter, power and production capacity of ball mills are developing towards large-scale and high-efficiency. It is hoped that the cost performance of grinding balls will be better, that is, high hardness, low wear, and reasonable price; in order to create better The economic and social benefits, the current domestic medium and high chromium casting grinding ball quenched state hardness is only HRc52-56, which is far from meeting the requirements of domestic and foreign markets

Method used

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  • Production process method of high-carbon multi-element alloy casting grinding ball

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] diameter High-carbon multi-element alloy casting grinding ball, its chemical composition is as follows:

[0048] Carbon (C): 2.5%, Silicon (Si): 0.75%, Manganese (Mn): 0.46%,

[0049] Chromium (Cr): 4.5%, Phosphorus (P): 0.051%, Sulfur (S): 0.054%;

[0050] Copper (Cu): 0.061%, Molybdenum (Mo): 0.032%, Nickel (Ni): 0.026%,

[0051] Tungsten (W): 0.02%, composite heavy rare earth modifier (Y-Re): 0.15%,

[0052] Iron (Fe): 91.4%.

[0053] The manufacturing process of high carbon multi-element alloy casting grinding ball is as follows:

[0054] Firstly, the steel scrap is melted in an intermediate frequency induction furnace, and the temperature is raised to 1480-1520°C, and then Cr, Cu, Mo, Ni, W alloys are added to achieve the required chemical composition. Then put the massive composite heavy rare earth modifier into the molten iron ladle, melt it with molten iron and let it stand for 7 minutes to carry out the modification and inoculation treatment of the molt...

Embodiment 2

[0063] The chemical composition of the high-carbon multi-element alloy casting grinding ball with a diameter of 50mm is as follows:

[0064] Carbon (C): 2.3%, Silicon (Si): 0.82%, Manganese (Mn): 0.60%,

[0065] Chromium (Cr): 5.1%, Phosphorus (P): 0.06%, Sulfur (S): 0.05%;

[0066] Copper (Cu): 0.04%, Molybdenum (Mo): 0.04%, Nickel (Ni): 0.03%,

[0067] Tungsten (W): 0.02%, composite heavy rare earth modifier (Y-Re): 0.13%,

[0068] Iron (Fe): 90.8%.

[0069] The manufacturing process of high-carbon multi-element alloy casting grinding ball with a diameter of 50mm is as follows:

[0070] Firstly, the steel scrap is melted in an intermediate frequency induction furnace, and the temperature is raised to 1480-1520°C, and then Cr, Cu, Mo, Ni, W alloys are added to achieve the required chemical composition. Then put the composite heavy rare earth modifier into the molten iron ladle, melt it with molten iron and let it stand for 6 minutes to carry out the modification and inocu...

Embodiment 3

[0079] The chemical composition of the high-carbon multi-element alloy casting grinding ball with a diameter of 120mm is as follows:

[0080] Carbon (C): 1.4%, Silicon (Si): 0.8%, Manganese (Mn): 0.9%,

[0081] Chromium (Cr): 6.0%, Phosphorus (P): 0.04%, Sulfur (S): 0.04%;

[0082] Copper (Cu): 0.05%, Molybdenum (Mo): 0.03%, Nickel (Ni): 0.02%,

[0083] Tungsten (W): 0.02%, composite heavy rare earth modifier (Y-Re): 0.13%,

[0084] Iron (Fe): 90.7%.

[0085] The manufacturing process of high-carbon multi-element alloy casting grinding ball with a diameter of 100mm is as follows:

[0086] First, the steel scrap is melted in an intermediate frequency induction furnace, and the temperature is raised to 1510-1560°C, and then Cr, Cu, Mo, Ni, W alloys are added to achieve the required chemical composition. Then put the composite heavy rare earth modifier into the molten iron ladle, melt it with molten iron and let it stand for 5 minutes to carry out modification and inoculation...

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Abstract

The invention relates to a grinding medium applied to the powder body engineering in industries, such as construction materials, cement and the like, in particular to a production process method of ahigh-carbon multi-element alloy casting grinding ball. The casting grinding ball comprises the following chemical components by weight percent: 1.4-2.5% of carbon, 0.75-0.82% of silicon, 0.46-0.9% ofmanganese, 4.5-6.0% of chromium, 0.04-0.06% of phosphorus, 0.04-0.054% of sulfur, 0.04-0.06% of copper, 0.03-0.04% of molybdenum, 0.02-0.03% of nickel, 0.02% of tungsten, 0.13-0.15% of compound heavyrare earth modificator and 90.4-91.4% of iron. The production operation comprises steps of smelting, casting, heat treatment, mechanical property detection and pouring inspection, wherein heat treatment quenching is oil quenching treatment. The improvements are that: (A) austenitizing treatment is carried out before quenching; and (B) the temperature of quenching oil is 80-140 DEG C, and the quenching time is 6-20 minutes. The formula of the invention is adopted to thin the crystal grains of a grinding ball, the tissues are compact, and the toughness is enhanced; by adopting the technology ofthe invention, the hardness of a high-chromium grinding ball reaches HRc62-64, and the toughness and the wear resistance of the grinding ball are obviously enhanced. On the precondition of further enhancing the properties of wear resistance and crushing resistance of the grinding ball, the content of the noble metal of chromium is reduced, and the manufacturing cost of the grinding ball is also lowered.

Description

technical field [0001] The invention relates to a grinding medium and a production process for powder engineering used in industries such as building materials, cement, mine metallurgy, energy thermal power, non-metal processing, coal water slurry and magnetic materials. Background technique [0002] As a grinding medium, grinding balls are widely used in powder engineering in building materials, cement, mining metallurgy, energy thermal power, non-metal processing, coal water slurry and magnetic materials. Due to the need to meet the requirements of different equipment and different working conditions in various industries, the materials for manufacturing grinding balls are various, such as forged steel balls, nodular cast iron grinding balls, chromium alloy casting grinding balls, etc., and the specifications are also from arrive even larger diameters. [0003] Chromium alloy casting grinding ball is a new generation of high-efficiency grinding ball developed following...

Claims

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Application Information

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IPC IPC(8): C22C38/60C22C38/56C22C38/44C21D1/18C21D1/58C21D11/00
Inventor 陈宗明陈晓明章林赵金华汪国清
Owner 安徽省凤形新材料科技有限公司
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