... 焊缝金属 metal of welded seam 焊接工艺参数 welding technological parameter 后热 postheat ...
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By analyzing the relation of microstructure, weld zone quality and tensile property, it is concluded that the welding technological parameter of L245 steel is the main factor of the welding crack.
通过分析l 245钢埋弧焊焊缝区质量、微观组织和拉伸性能关系表明，焊接工艺参数的合理制定是低合金钢l 245焊管产生裂纹等缺陷的关键因素。
The technological parameter of post-welded heat-treatment is determined by welding thermal simulation test.
用焊接热模拟方法确定了焊后热处理工艺参数。
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