Grinding balls can reach 125mm or more in terms of specifications, and their market demand is large. At the same time, in order to reduce the wear of the grinding ball, it is required that the grinding ball has a higher hardness, and also requires a higher impact fatigue life. In the carbon content of the material, it is required to be in the range of 0.7% to 0.85%. In addition, the original austenite energy before the grinding ball is quenched must be small, and the grain size level is higher than 7 levels.
It needs to pay attention to its use:
(1) The production process of forged grinding balls is mainly for forging. It can have strong hardenability through the reasonable matching and heat treatment of some alloying elements, and the hardness difference between inside and outside is small, and it is not easy to break and other problems. Further, the crushing rate of the grinding ball can be reduced, and it can be controlled within 1%.
(2) Since the crushing rate of the forged grinding ball is small, the aluminum powder of the mill can be increased and the cost of the beneficiation can be reduced, thereby further improving the production efficiency of the mill.
(3) The metallographic structure of the forged grinding ball is a fine needle martensite structure with high hardness. Therefore, if it is the same as the wear resistance of the foundry grinding ball, then the price of this kind of grinding ball is lower than that of the casting grinding ball, and the grinding cost is also lower.http://www.grindingballsmedia.com/