...点焊接一般采用的是EQ56和EH36这样的低合金超高强钢和高强钢，焊接时其最高硬度出现在或靠近熔合线附近的CGHAZ（热影响区粗晶区），裂纹也常在此区产生 ..
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The result show that the microstructure formed after thermal cycle was mainly lath bainite and granular bainite in CGHAZ .
结果表明：在不同的焊接热循环条件下，焊接粗晶区组织主要是板条贝氏体和粒状贝氏体。
The results show that the dispersed second phase particles can effectively retard the growth of austenite grain in the CGHAZ, and improve the toughness.
结果表明，细小弥散的第二相粒子能有效地阻碍焊接热影响区粗晶区的原奥氏体晶粒长大，改善该区域的韧性。
Under the experiment's welding condition, WCX355 ultrafine grained steels didn't distinctly embrittle in CGHAZ and didn't soften in tempering zone either.
在试验的焊接条件下，WCX355超细晶钢在热影响粗晶区未有明显脆化，在回火区也未发生软化现象。
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