Heat Treatment Process For High Chromium Grinding Ball

Release time：2021-10-12

Ball mill is widely used in building materials, mineral processing, cement, thermal power generation and fertilizer production of the main grinding equipment, grinding ball is the largest consumption of wear-resistant parts. Therefore, with the continuous development of key industries such as building materials, the demand for grinding balls will increase greatly. At present, ordinary forged steel balls are mainly used, with an average consumption of one kilogram of steel balls per ton of cement, and about two kilograms of steel balls per ton of metal ore ground This was nearly ten times more relevant than at the time. Especially as the third generation of anti-wear Alloy High Chromium White cast iron developed successfully, so that more than 4.5 m of large-scale cement mill ball consumption to 30 ~ 50 G / T, medium and small-scale cement mill ball consumption also reduced to only 100 G / T or so The new material revolution has greatly improved productivity and economic returns. It was only in the mid-1970s that I began my research on the development of cr-based white cast iron. The Xi’an Jiaotong University of Mn-Cr-Cu-Mo series and high-cr-based wear-resistant white cast iron were selected and developed. Since the 1980s, a variety of new wear-resistant materials developed in China have been gradually applied to the actual abrasive wear operations, some of which have reached the level of similar products abroad.

The good wear resistance of high chromium cast iron mainly depends on its matrix structure and the type and distribution of carbides. High Chromium cast iron is a kind of chromium white cast iron with chromium content between 12% -28%. This alloy of carbon and hard compounds gives high chromium cast iron good wear resistance. On the other hand, during solidification, M7C3 type carbides distribute in a rod-like shape, which can improve the toughness of high chromium cast iron to some extent. The production of high chromium cast ball is mainly composed of casting and heat treatment.