Overview of high-frequency quenching process of quenching heat treatment for electric cloth cutting knives

The electric cloth cutting knife is heat treated by a high frequency quenching machine. After preheating heat treatment at 550 °C, it is transferred to 860-880 °C for reheating heat treatment. The heating temperature varies according to different steel grades. 1250-1260°C, 1190-1200°C, 1200-1210°C, 1150-1160°C, respectively. The grain size is controlled at 10.2-11 grades. Finally, a tempering heat treatment at 550-560 ° C is carried out.

Check the hardness after tempering, if it exceeds 64HRC, it should be increased to 580℃ tempering. Check the straightness one by one. If the tolerance is exceeded, continue to clamp and temper, but overheating is not allowed.