金属零件的热处理是为了使材料获得良好的组织结构,从而使零件在工作中具有较高的物理与机械性能。此外,一些航空零件在加工过程中为了下述目的也需要对半成品件进行热处理:(1)消除有害的残余拉应力(如焊接结构件,机械加工件等);(2)消除冷作硬化恢复材料的塑性(如冷成形件);(3)改变由于冷加工面引起的组织结构上的变化(如 Heat treatment of metal parts is to make the material get a good organizational structure, so that parts in the work with high physical and mechanical properties. In addition, some aeronautical components require heat treatment of semi-finished products during processing for the following purposes: (1) Elimination of harmful residual tensile stresses (such as welded structural parts, machined parts, etc.); (2) Elimination of cold work hardening Plasticity of the material (eg, cold formed parts); (3) changes in the organizational structure due to cold working surfaces (eg,