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

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...

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 production efficiency. Steel 1) The Si content is high, which greatly increases the yield ratio of the material and reduces the plasticity of the material, so the steel ball is more likely to crack during the quenching process