采用热模拟方法，对EH36 MOD钢焊接热影响区粗晶区(CGHAZ)的相变超塑性及其对疲劳寿命的影响进行了研究。

The transformation superplasticity in welding CGHAZ (Coarse Grain Heat Affected Zone) of EH36MOD steel and its effect on fatigue life have been studied with thermal simulating method.

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但该钢在热加工过程中极易产生粗晶，从而影响性能。

But the large grains will be created in microstructure during heat processes.

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采用热模拟技术研究了二次热循环对X80级管线钢焊接粗晶区性能的影响。

To study quadratic heat circulation to the effect of welding wide crystal area performance of X80 pipeline steel by adopting thermal simulation technology.

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