By use of the method of welding thermal simulation, the morphology in HAZ was simulated and the post-weld heat treatment under different tempering parameter to the test specimen was carried out.
采用焊接热模拟的方法，模拟HAZ粗晶区组织，并在不同回火参数下对试样进行焊后热处理。
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According to this result, self tempering temperature of the bar under different control cooling condition was calculated, the process parameter affecting the self tempering temperature is obtained.
The authors researched on the microstructure of a new non-carbide bainite abrasion resisting steel under the different tempering temperatures and its dynamic performance.