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前言热处理是在零件通过各种成形加工之后的一个工序,冷却又是热处理的最后过程,由于在冷却时的温度急剧下降和相变间的比
Preface Heat treatment is a process after parts through a variety of forming, cooling and heat treatment is the final process, the temperature dropped sharply during cooling and the ratio between the phase transition