Automatic casting grinding balls making machine consists of casting line, metal molds online, and pouring line. The casting line includes a sand shooting machine, cooling & heating device, motorized roller table, and casting pick-up device, molds opening device, and vibrating molds cleaning device.
According to GB9441-88, the spheroidizing grade of each furnace number sample and grinding ball is above 1 ~ 2 grade, the size of spheroidal graphite is above 7 ~ 8 grade (100 times Figure 2), the number of graphite balls is more, and the distribution is uniform, the matrix structure (1000x Figure 3) of the […]
After analyzing the elements of grinding ball material for Bainite Ductile Iron Balls, goes to the next step– casting and melting process. Wet sand molding, alloy melting in a one-ton cupola. (1) metal charge: High Quality No. 18 Benxi pig iron, return iron, ferromolybdenum, ferrosilicon, Ferromanganese, scrap steel, return charge, and spheroidized alloy. These metal […]
Abstract: The heat treatment process of step isothermal quenching of casting waste heat can be used to produce low alloy (Mo, Mn, Cu, CR) ductile iron grinding ball materials; its matrix structure is lower bainite with a small amount of martensite, retained austenite and carbide, impact value is more than 14J/CM2, hardness is 52 ~ […]
Through the reasonable design of the chemical composition, strict control of the content of each element, through metal mold casting process and rapid cooling scheme, as-cast austenite, matrix structure, austenite occupied, volume content 55% ~ 70%, carbide content 20% ~ 26% can be obtained.