According to the production and processing technology, steel balls are divided into grinding steel balls, forging steel balls and casting steel balls. According to the processing materials, it can be divided into bearing steel balls, stainless steel balls, carbon steel balls, copper bearing steel balls, alloy balls, etc. Among them, bearing steel ball is an important basic component of industry, and alloy steel ball is a spherical ferroalloy wear-resistant body which is produced by forging, spinning, rolling and casting with carbon, chromium, manganese, molybdenum, etc. as the main added metal elements. It is the most important component of crushing industrial mine balls and cement balls.