Does the hardness of the high chromium grinding balls reach 68HRC after heat treatment?

Release time：2025-12-16

Does the hardness of the high chromium grinding balls reach 68HRC after heat treatment?

The high-chromium grinding balls undergo special heat treatment, and their hardness can indeed reach 68HRC. However, this is already the limit of the critical hardness for steel balls. Do you think that the higher the hardness of the high-chromium balls, the better they are at wear resistance? In some industrial applications, especially for fine grinding or low-impact operations, the higher the hardness of the steel balls, the better their wear resistance, and the lower the tonnage loss per unit of ore. However, in some other industrial applications, when the hardness is too high, the toughness of the steel balls will sharply decrease, and they are more prone to cracking during impact, resulting in an increase in overall loss. The ideal state is for the steel balls to maintain a hardness of 58-65HRC, balancing both wear resistance and impact resistance. Selecting steel balls is not about blindly pursuing high hardness, but rather finding the balance point of toughness.