Steel for high abrasion-resistant and impact-resistant alloy steel ball

An alloy steel ball and impact resistance technology, applied in the field of alloy steel, can solve the problems of reduced production efficiency, easy cracking of steel balls, reduced plasticity, etc., and achieves the effect of saving Si and Cr, reducing yield ratio and improving impact resistance.

Inactive Publication Date: 2010-12-08
JIANGSU SHAGANG GROUP HUAIGANG SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For large-section steel balls, it is easy to produce quenching and tempering cracks during the quenching process. Once such defects occur, the steel balls must be scrapped, which will greatly increase the cost and reduce pro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] Take C 0.82%, Si 0.32%, Mn 0.82%, Cr 0.55%, Ni 0.02%, S 0.004%, P 0.012%, Cu 0.03%, and the rest is Fe. After smelting in a conventional converter or electric furnace, it is refined in a refining device, and barium microalloying and final deoxidation are performed in the later stage of refining. After the refining composition is adjusted, RH / VD is used for degassing and inclusion removal, and RH / VD can also be used for degassing and inclusion removal before LF refining.

[0025] φ100mm bars, hot rolled into steel balls, steel balls are quenched in water at 780-820°C, tempered in water at 180-220°C, and steel balls are tested by continuously making steel balls fall freely from a height of 8 meters for 30 hours Impact resistance and wear resistance, test result: good.

Example Embodiment

[0026] Example 2

[0027] Take C 0.78%, Si 0.30%, Mn 0.80%, Cr 0.50%, Ni 0.03%, S 0.005%, P 0.012%, Cu 0.03%, and the rest is Fe.

[0028] φ90mm bars, hot rolled into steel balls, steel balls are quenched in water at 780-820°C, tempered in water at 180-220°C, and steel balls are tested by continuously making steel balls fall freely from a height of 8 meters for 30 hours Impact resistance and wear resistance, test result: good. All the other implementations are as in Example 1.

Example Embodiment

[0029] Example 3

[0030]Take C 0.75%, Si 0.28%, Mn 0.75%, Cr 0.52%, Ni 0.04%, S 0.006%, P 0.015%, Cu 0.03%, and the rest is Fe.

[0031] φ80mm bars, hot rolled into steel balls, steel balls are quenched in water at 780-820°C, tempered in water at 180-220°C, and steel balls are tested by continuously making steel balls fall freely for 30 hours from a height of 8 meters Impact resistance and wear resistance, test result: good. All the other implementations are as in Example 1.

[0032] The steel balls made of the material of the invention have a service life of 10-13 weeks after being used in mines and refractory plants, and the usability of the material of the invention has been widely praised by users.

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PUM

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Abstract

The invention discloses steel for a high abrasion-resistant and impact-resistant alloy steel ball. The steel comprises the following chemical compositions in percentage by weight: 0.68 to 0.84 percent of C, 0.10 to 0.40 percent of Si, 0.68 to 0.88 percent of Mn, 0.40 to 0.60 percent of Cr, less than or equal to 0.25 percent of Ni, less than or equal to 0.030 percent of S, less than or equal to 0.030 percent of P, less than or equal to 0.25 percent of Cu and the balance of Fe. On the basis of greatly reducing the content of Si and Cr, by properly adjusting the content of C and Mn, the Si and Cr are saved, the cost of the materials is reduced and the abrasion resistance and impact resistance of the steel are greatly improved. Meanwhile, the steel has good smelting technological properties, the production process is stable, billet steel does not have the defects of cracks, impurities, severe shrinkage cavity, looseness, and the like, the plasticity of the materials is improved, and the cracking phenomenon of the steel ball in the quenching process is avoided.

Description

Technical field: [0001] The invention relates to alloy steel in the iron and steel industry, in particular to steel for steel balls with strong wear resistance and impact resistance. Background technique: [0002] With the development of mining, construction, metallurgy, chemical industry, ceramics, energy, power plants and cement industries at home and abroad, the market demand for various abrasive materials is increasing. As an excellent abrasive material, steel balls are widely used in the above Powder preparation and ultrafine powder deep processing in various industries. In recent years, the share of steel for steel balls in the domestic and foreign markets has become larger and larger, and with the trend of large-scale ball mills, the working environment of steel balls has become more severe, and the performance requirements of users for steel balls have become more and more stringent. , The steel used for steel balls is gradually developing in the direction of high t...

Claims

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Application Information

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IPC IPC(8): C22C38/42
Inventor 王忠英张银生尹修刚陆萍吴亚平袁敏
Owner JIANGSU SHAGANG GROUP HUAIGANG SPECIAL STEEL CO LTD
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