Heat treatment deformation of GCr 15 bearing steel?

To reply 1#, the raw materials should be inspected for spheroidization, banded structure, segregation, etc. Second, heat treatment deformation is not necessarily caused by too fast cooling rate. If the cooling speed is not enough, the deformation may be greater than if the cooling speed is too fast. Don't stop stirring in the oil pool until the reason is found out. Check the quenching hardness of the workpiece. If the hardness of the workpiece is high and uniform, it means that the cooling speed is too fast, so it is necessary to reduce the temperature of the oil pool and stop the oil pool stirring. Under the condition of ensuring hardness, reduce the cooling speed as much as possible; If the quenching hardness is not enough and uneven, it is the deformation caused by insufficient cooling speed. Therefore, it is necessary to increase the cooling speed, increase the stirring speed, increase the temperature of quenching oil, and switch to rapid quenching oil to increase the cooling speed!