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本文介绍了手工钨极氩弧焊接T91小径管时在HAZ区域中实测的热循环结果,其t8/5值与焊接热模机拟定的t8/5有较大的差别。提出了焊接T91小径管可以免去焊前预热的看法。
In this paper, the results of the thermal cycling measured in the HAZ zone by hand TIG welding of T91 small diameter tube are introduced. The t8 / 5 value is different from the t8 / 5 proposed by the welding thermal model machine. Proposed welding T91 diameter tube can be removed before welding preheating view.