Difference between vacuum quenching and ordinary quenching

The difference between vacuum quenching and ordinary quenching lies in the difference of process principle and process effect.

1, the difference of process principle: ordinary quenching is a metal processing method, which heats the metal material to a certain temperature, and then quickly puts it into a cooling medium with high hardness to cool it quickly, thus increasing the hardness and wear resistance of the material and changing its structure and use. Its technological principle is mainly based on the rapid heat transfer between quenching medium and metal material, while vacuum quenching is to heat metal material to a certain temperature in vacuum environment. And then rapidly cooled in the same environment. Because there is no air in the vacuum, the metal material will not be oxidized or polluted, thus maintaining its good surface smoothness and material properties.

2. Different technological effects: The effect of ordinary quenching is relatively simple, and its main function is to improve the hardness and wear resistance of metal materials, but it also brings hot cracks, unevenness, deformation and other defects. Ordinary quenching can only be applied to some low-alloy steels and alloy steels with good heat resistance after heat treatment, but not to high-content alloy steels and powder materials, while vacuum quenching can effectively avoid the above defects and is more suitable for high-content alloy steels and powder materials. The effects of vacuum quenching are mainly as follows.

3. Vacuum quenching is a heat treatment process. Compared with traditional quenching technology, vacuum quenching has obvious characteristics and advantages. This process is carried out in a vacuum furnace. The parts are heated to an appropriate temperature in vacuum, and then rapidly cooled in vacuum or a specific cooling medium to increase the hardness and strength of the parts.