- 11
- Feb
Reasons for the low hardness of shaft parts during high-frequency quenching
Reasons for the low hardness of shaft parts during deminta-soo noqnoqoshada badan:
① The power of the equipment is improperly selected, the heating specific power is small, and the heating time is short;
② The design of the inductor and cooler is unreasonable, and the inner diameter of the inductor is inconsistent with the workpiece, resulting in uneven heating and cooling;
③ The heating and cooling process is unreasonable, or there is water in the sensor, and it is attached to the workpiece to form a soft spot after quenching, or the pressure of the cooling medium is small, the flow of the medium is small, and the spray hole is blocked, resulting in insufficient cooling;
④ Excessive heating power and long heating time, overheating or coarse grains;
⑤ Coarse massive ferrite exists in the original structure, the carbon content of the material is too high or the hardenability of the material is too high or too poor;
⑥ Uneven tempering temperature or insufficient tempering;
⑦ The quenching temperature is low or the moving speed is too fast;