What does it mean, grinding burn?
The term grinding burn while grinding is understood as the thermal damage of a ground part caused by an incorrect grinding process. Grinding burn is caused by excessive heat dissipation into the part material. As materials cool as rapidly as they heat, the material undergoes a treatment similar to a tempering process. At high enough tensile stresses, caused by the grinding burn at the outer edges of the material rim zone, the material could undergo micro cracking. Dynamic strain causes the micro cracks to grow into greater cracks which consequently lead to a mechanical failure of the part. Thus, grinding burn is the most common reason for mechanical failure of dynamically strained metal parts.