According to the tempering temperature and hardness curve, the redistribution of residual stress is associated with the transformation of residual austenite.

由回火温度与硬度变化曲线证实，残余应力重新分布是与残余奥氏体转变相关联。

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Optical metallographic microscope, micro-hardness tester, electron microprobe and X-ray diffraction analysis were applied to explore the process of intermediate temperature tempering transformation.

利用光学金相显微镜、显微硬度计、电子探针及X射线衍射分析仪初步探索其中温回火转变过程。

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The big area laser transformation hardening must adopt the methods of facular joint in giving priority to attrition, and the tempering zone can't be avoided in the joint.

以提高耐磨性为主的大面积激光相变硬化必须采用光斑搭接方法，在搭接处的回火带是不可避免的。

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