1 When the parts are stacked, the placement method, stacking number and weight, etc. It should be considered to avoid deformation caused by the dead weight of parts and heavy stacking pressure during heat treatment.
In the heating stage, the heating curve should be determined according to the actual situation, such as slow heating and preheating, which can avoid deformation to some extent.
3. In the heat preservation stage, under the condition of meeting the requirements, short heat preservation time can reduce deformation.
4 quenching, different cooling conditions such as different quenching oils, cooling and stirring. There are different deformations.
5 Tempering temperature and time control