金属热处理是将金属工件放在一定的介质中加热、保温、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工艺方法。
结果表明，压铸模具的失效原因主要是：电加工导致的缺陷，材料热处理工艺不当，以及金属液的冲击等。
The results reveal that the crack failure of the mould is mainly attributed to the electrical discharge machining, the improper heat treatment process and the impact of liquid metal.
对碳钢表面金属陶瓷涂层的配方、涂敷工艺、热处理工艺等进行了研究。
The formulations, application process and heat treatment process, etc of metal ceramic coatings on carbon steel surface are researched.
金属热处理是机械制造中的重要工艺之一，正火是生产中常用的热处理工艺。
Metal heat treatment is one of important mechanical procedures, and normalizing is used frequently during the heat treatment.
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