And the higher temperature tempering is not the main reason for the decarburization.
另外研究发现高温回火并不是引起零件表面脱碳的主要原因。
It is found that the steel resistances to fatigue crack growth increase with the rising of the tempering temperature when it is higher than the second hardening peak temperature.
发现高于二次硬比峰温度回火时，此钢的疲劳裂纹扩展阻力随回火温度升高而增加。
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