Vacuum Heat Treatment of Steel Material

  1. Annealed:
①Reduce the hardness of steel and improve the plasticity to facilitate cutting and cold deformation processing.
②Refine the grain, uniform the structure of the steel, improve the performance of the steel and prepare for the subsequent heat treatment.
③Eliminate the internal stress in the steel. Prevent deformation and cracking of parts after machining.

  1. Normalizing:
①Improve organizational structure and machining performance.
②For parts with low requirements on mechanical properties, normalizing is often used as the final heat treatment.
③Eliminate internal stress.

  1. Quenching:
①Enable steel parts to obtain higher hardness and wear resistance.
②Make the steel parts get some special properties after tempering, such as higher strength, elasticity and toughness, etc.

  1. Tempering:
①Obtain the required mechanical properties. Under normal circumstances, the strength and hardness of the parts after quenching are greatly improved, but the plasticity and toughness are significantly reduced, and the actual working conditions of the parts require good strength and toughness. After selecting the appropriate tempering temperature for tempering, the desired mechanical properties can be obtained.
②Stable tissue, stable size.
③Eliminate internal stress.