金属热处理是将金属工件放在一定的介质中加热到适宜的温度，并在此温度中保持一定时间后，又以不同速度冷却，通过改变金属材料表面或内部的组织结构来控制其性能的一种工艺。 Metal heat treatment is a process that involves placing metal workpieces in a specific medium, heating them to an appropriate temperature, maintaining that temperature for a set period, and then cooling them at varying speeds This process controls the performance of the metal by altering the structural organization of its surface or interior