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本文对40CrNiM_0.钢材在不同热处理工艺下的疲劳门槛值上△K_th进行试验研究,得出了采用870℃油淬,650℃回火工艺,其门槛值最高的结论.
In this paper, the fatigue test of 40CrNiM_0 steel under different heat treatment conditions is studied. The conclusion is that the threshold value of the quenched steel with 870 ℃ and the tempering at 650 ℃ is the highest.