Does 45 Quenched And Tempered Steel need special treatment after welding

45 Quenched And Tempered Steel (45 quenched and tempered steel) usually needs special treatment after welding for the following reasons:
Relieve welding stress: Large internal stress will be generated during welding. If it is not eliminated, it may cause deformation or even cracking of the weldment during use. Generally, stress relief annealing can be used to heat the weldment to a certain temperature (usually 550-650℃), keep it warm for a period of time, and then slowly cool it to fully release the internal stress.
Improve the structure of the welded joint: During welding, the structure of the weld and the heat-affected zone will change, and coarse grains and other structural forms that are not conducive to performance may appear. Through normalizing or tempering treatment, the grains can be refined, the structure can be improved, and the comprehensive properties of the welded joint, such as strength, toughness and plasticity, can be improved. For example, for some weldments with high toughness requirements, tempering treatment can effectively improve their toughness.
Restore material properties: After welding, the quenching and tempering state of the heat-affected zone of 45 quenched and tempered steel will be destroyed, and the material properties will decrease. Through proper heat treatment, such as re-quenching and tempering, the performance of the welded joint and heat-affected zone can be restored to a level close to that of the parent material, ensuring the consistency and reliability of the overall performance of the weldment.
Therefore, in order to ensure the quality and performance of 45 quenched and tempered steel welded structures, it is necessary to perform corresponding special treatment after welding. The specific treatment process should be determined comprehensively based on the specific requirements of the weldment, structural characteristics, welding process and other factors.
If you want to know whether 45 Quenched And Tempered Steel needs special treatment after welding, you can contact Zhongao's professional technicians, and we will do our best to help you!