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首页> 外文期刊>Journal of Iron and Steel Research International >Microstructure and Property of Coarse Grain HAZ X80 Pipeline Steel
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Microstructure and Property of Coarse Grain HAZ X80 Pipeline Steel

机译：粗晶粒HAZ X80管线钢的组织和性能

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摘要

The coarse grain HAZ microstructure and property of X80 pipeline steel with different carbon content was investigated. The weld thermal simulation test was carried out on Gleeble 1500 thermal mechanical test machine. The Charpy tests were completed at -20 deg C for evaluating the toughness of coarse grain heat affected zone (CGHAZ). The microstructure was examined by optical microscope (OM) and transmission electron microscopy (TEM) , and the austenite constituent was quantified by X-ray diffraction. The results showed that the ultra-low carbon can improve the toughness of CGHAZ by suppressing the formation of carbide, decreasing the martensite austenite (M-A) constituent and increasing the residual austenite in the M-A.
机译：研究了不同碳含量的X80管线钢的粗晶粒热影响区组织和性能。焊接热模拟测试是在Gleeble 1500热机械测试机上进行的。为了评估粗粒热影响区（CGHAZ）的韧性，在-20℃下完成了夏比测试。通过光学显微镜（OM）和透射电子显微镜（TEM）检查显微组织，并通过X射线衍射对奥氏体成分进行定量。结果表明，超低碳可通过抑制碳化物的形成，减少马氏体奥氏体（M-A）的成分并增加M-A中的残余奥氏体来提高CGHAZ的韧性。

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