The process of heat treating is the method by which metals are heated and cooled in a series of specific operations that never allow the metal to reach the molten state.
金属热处理过程其实是一系列具体的操作，通过这些操作加热与冷却金属，但加热时进行控制，使得金属不达到熔融的状态。
Also, heat treating can make a metal softer and more ductile.
同时，热处理也可以使金属韧性增强。
Heat processing: normal heat treating and chemical heat treating of steel and nonferrous metal; testing the hardenability of steel; surface treatment of steel.
热处理：钢及有色金属的常规热处理与化学热处理，钢的淬透性测试，钢的表面处理等。
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