Forged grinding media balls are widely used in the fields of building materials, mining, cement, electric power, etc., and with the rapid development of the industry, the demand for forged grinding media ball will increase significantly, and the requirements for grinding balls are also higher. It is. The forged grinding ball with good toughness and strong impact resistance is more favored by the market.
At present, the medium and high carbon large diameter forged grinding media ball used in the domestic market mainly have problems such as low hardness, uneven hardness distribution, and poor wear resistance. Some alloy steel balls increase the hardenability of the grinding balls by adding precious alloying elements such as Cr, N1, Mo, etc., but at the same time increase the production cost of the grinding balls.
In order to improve the hardenability of the ball by adding cheap S1 and Mn elements, the production cost is reduced, and the use performance of the medium and high carbon large diameter forged grinding balls is significantly improved by the reasonable forging process and heat treatment process. It can reach 60-62HRC, the surface and core hardness difference is <5HRC, and the impact toughness is good. The ball drop experiment is more than 12000 times without breaking.