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

The clothing industry has long been mechanized and automated, and cutting cloth is no longer manual. Even an electric cloth cutting knife needs to withstand huge friction when cutting cloth. Therefore, many manufacturers now use high-frequency quenching machines for quenching heat treatment to improve its hardness, wear resistance and service life, and the effect is very good. Today, I will give you an overview of the process of high-frequency quenching using quenching heat treatment for electric cloth cutting knives. To

At the beginning, the electric cloth cutter was made of alloy tool steel. After the 1990s, it was basically made of general-purpose high-speed steel, with a hardness requirement of 62-64HRC and a straightness of ≤0.15mm. Since the blade is very thin, only 1-1.8mm, it is easy to deform during quenching, so the difficulty in heat treatment is how to control the deformation. To

The electric cloth cutting knife adopts high frequency hardening machine for heat treatment. After preheating heat treatment at 550℃, it is transferred to preheating heat treatment at 860-880℃. The heating temperature varies with different steel grades. W18, M2, 9341, 4341 quenching heating temperature They are 1250-1260°C, 1190-1200°C, 1200-1210°C, and 1150-1160°C respectively. The grain size is controlled at 10.2-11 level. 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℃ for tempering. Check the straightness one by one. Those who are out of tolerance will continue to be clamped and tempered, but overheating is not allowed. To

The heat treatment process directly affects the heat treatment quality of the workpiece. Therefore, it is very important to master the heat treatment process of the workpiece. According to the above description, I believe that everyone has already understood the high-frequency quenching heat treatment process of the electric cloth cutting knife. However, here is a reminder that you must be careful and careful when performing the heat treatment to avoid deformation of the workpiece.