T91 小径管焊接热循环的启示

Welding Special Column Enlightenment From Welding Heat Cycle of T91 Small Diameter Tubes

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。

The real measurement of heat cycle in the HAZ area during applying manual tungsten argon arc welding to T91 small diameter tubes is reported in this paper. The measured t 8/5 value is quite different from that given by heat simulation machine. The authors suppose that the pre weld heating can be omitted for applying welding to T91 small diameter tubes.