What is the purpose of tempering steel plate in heat treatment process?

1. After quenching, the steel parts will have great internal stress and brittleness. If the steel parts are not tempered in time, the steel parts will deform or even crack;

2. In order to meet the requirements of different properties of various workpieces, the hardness can be adjusted by proper tempering to reduce brittleness and obtain the required toughness and plasticity;

3. Stable workpiece size;

4. For some alloy steels that are difficult to soften by annealing, high temperature tempering is often used after quenching (or normalizing) so that carbides in the steel are properly accumulated and the hardness is reduced to facilitate cutting;

According to the different performance requirements of the workpiece, the tempering temperature is also different during heat treatment.