tempering after hardening的意思|示意

Because the hardness of substrate was low after vacuum melting, the hardness of substrate was increased by hardening and tempering methods.

由于真空烧结涂层基体的硬度较低，采用对基体调质处理的方法来提高涂层基体的硬度。

Then hardness of coatings and substrate was measured. By means of bend-rotation fatigue tests, fatigue strength of coating and uncoating specimens was compared after hardening and tempering.

然后测量涂层和基体的硬度，并通过采用旋转弯曲疲劳试验比较涂层试样与未涂层试样的疲劳强度。