Development and production of Bainite Ductile Iron grinding ball (3)

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 […]

Development and production of Bainite Ductile Iron grinding ball (2)

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 […]

Development and production of Bainite Ductile Iron grinding ball material (1)

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 ~ […]