High-carbon high-alloy wearable steel ball

A manufacturing method and technology of wear-resistant steel, applied in the manufacture of the steel grinding ball, in the field of high-carbon and high-alloy steel grinding balls, can solve the problems of not meeting the requirements of large-scale grinding ball machines, shortening the life of the mill liner, wasting resources, etc. Problems, achieve good application effect and economic benefits, ideal combination of wear resistance and toughness, and improve economic benefits

Inactive Publication Date: 2005-12-07
吴彦彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Years of research and practice have shown that high chromium cast iron grinding balls are designed to be too large due to the composition and dosage of materials, which increases costs and wastes resources, and will still break after 3000 hours of operation
In order to achieve an ideal match between the toughness and wear resistance of the grinding ball, and to make up for the lack of wear resistance and good toughness of the grinding ball, it must be quenched and tempered at high temperature, but this method is not ideal, and early deformation of the grinding ball is common. and crushing problems, and because the hardness of high chromium cast iron does not match the hardness of the mill liner, the service life of the mill liner is greatly shortened, which is far from meeting the requirements of large ball mills
Although the production cost of low-chromium alloy grinding balls is low, because of its high breakage rate and easy loss of roundness, it cannot guarantee to meet the requirements of large-scale grinding mills, so it cannot be used as a replacement product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: The chemical composition and weight ratio of the steel ball of the present invention are: 1.82 parts of C, 5.3 parts of Cr, 1.1 parts of Si, 0.59-1.0 parts of Mn, 0.058-0.15 parts of Mo, 0.038 parts of Cu, 0.59 parts of rare earth parts, S≤0.035 parts, P≤0.035 parts, and the rest is Fe.

[0009] The manufacturing method is as follows: mixing steel scrap with raw materials containing the chemical components described in claim 1, melting in an intermediate frequency electric furnace, and melting it when the temperature is raised to 1550°; then, taking a sample before the furnace for analysis, and adjusting the chemical components content to make it reach the proportioning relation of each composition described in claim 1, then carry out casting, and casting temperature is 1430 °; Then, carry out metal mold casting (circle); Then, cast the steel ball of molding at 300 ° Heat treatment at constant temperature for more than 20 hours between ~600°C to obtain Leysit...

Embodiment 2

[0010] Embodiment 2: The optimum ratio of the chemical composition of the steel ball of the present invention is: C 1.98 parts (by weight) Cr 6.8 parts (by weight) Si 1.5 parts (by weight) Mn 1.0 parts (by weight) ) Mo 0.15 parts (by weight) Cu 0.06 parts (by weight) Rare earth 0.72 parts (by weight) S 0.035 parts (by weight) P 0.035 parts (by weight).

[0011] Its manufacturing method is as follows: mix steel scrap with raw materials containing the above-mentioned chemical components, melt it in an intermediate frequency electric furnace, and heat it up to 1550° to melt it; then, take a sample before the furnace for analysis, and adjust the content of each chemical component to reach According to the proportioning relationship of each component described in claim 1, casting is then carried out at a casting temperature of 1430°; then, metal mold casting (circular shape) is carried out; then, the cast steel ball is placed between 300°~600° Heat treatment at constant temperature...

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PUM

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Abstract

The invention provides a high-carbon high-alloy wearable steel ball which comprises, C 1.8-1.98 weight parts, Cr 5-6.8 weight parts, Si 1.0-1.5 weight parts, Mn 0.5-1.0 weight parts, Mo 0.05-0.15 weight parts, Cu 0.03-0.06 weight parts, rare earth 0.5-0.72 weight parts, S<=0.035 weigh parts, P<=0.035 weight parts, and balancing Fe.

Description

technical field [0001] The invention relates to a grinding ball used in a large grinding ball machine, in particular to a high-carbon and high-alloy steel grinding ball, and also relates to a manufacturing method of the steel grinding ball. Background technique [0002] Years of research and practice have shown that high chromium cast iron grinding balls are designed to be too large due to the composition and dosage of materials, which increases costs and wastes resources, and will still break after 3000 hours of operation. In order to achieve an ideal match between the toughness and wear resistance of the grinding ball, and to make up for the lack of wear resistance and good toughness of the grinding ball, it must be quenched and tempered at high temperature, but this method is not ideal, and early deformation of the grinding ball is common. And crushing problems, and because the hardness of high chromium cast iron does not match the hardness of the mill liner, the life of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/36
Inventor 裴怀军彭高蕾史林吴彦彬
Owner 吴彦彬
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