Casting iron ball, forged steel ball, rolled steel ball casting iron ball technology Advantages: simple equipment, less investment. Production technology and Operation Easy to master, to many specifications, small quantities of orders, arrange production easy and flexible. Process defects: Casting defects (stomata, sand hole, inclusions, surface, crack, etc.), low density, small proportion, coarse metal grains, poor impact toughness (generally 3~7j/cm2), high energy consumption, low metal yield, and φ40mm the following small pellets are very difficult to cast. Forging steel ball technology advantages: less investment, faster, the raw materials can be used both hot-rolled round steel, can also be used hot-rolled billet, blank length is not limited, production is easy to organize. Process disadvantage: Production quality is difficult to stabilize control; The single weight is different; the steel ball surface folds easily, the heating defect, the oxidation decarbonization, the grain becomes coarse, even overheating, over burning, the heat treatment quality is unstable, the final forging temperature difference is big, the quenching heat treatment quality is unstable, the product hardness, hardenability and the impact toughness cannot guarantee the stability; High cost. Rolling steel Ball Technology advantages: High production efficiency, large production, suitable for large-scale modern labor steel ball factory, rolling ball production mechanization, high degree of automation, stable quality, high hardness of steel ball, internal and external hardness is small, impact toughness is high, than significant. Technological shortcomings: the construction of large-scale investment, high technology content, many specifications, small batch order has a certain degree of difficulty, not suitable for small-batch frequent change of product specifications.