Main function of steel tempering

Main function of steel tempering
1. Reduce brittleness, eliminate or reduce internal stress. There are great internal stress and brittleness in steel parts after quenching. If the steel parts are not tempered in time, the steel parts will deform or even crack.
2. Obtain the mechanical properties required by the workpiece. After quenching, the workpiece has high hardness and high brittleness. In order to meet the requirements of different properties of various workpieces, the hardness can be adjusted by proper tempering to reduce brittleness, and the required toughness and plasticity can be obtained.
3. Stabilize the workpiece size
4. For some alloy steels which are difficult to soften after annealing, high temperature tempering is often used after quenching (or normalizing) to make carbides in steel gather properly and reduce hardness, so as to facilitate cutting.