石油化工工程不锈钢复合钢管的焊接

Welding technology of petroleum chemical engineering stainless steel composite pipe

不锈钢复合钢由两种不同的钢材组成,本研究从焊接施工中的坡口形式、错边量控制、焊缝返修、焊缝检验以及焊工资质和焊接工艺评定等方面介绍了不锈钢复合钢管的焊接特点及热处理工艺。焊接中,不锈复合钢管一般采取"V"形坡口单面焊背面自由成形的焊接工艺,采取"复层焊接→过渡层焊接→基层焊接"的焊接顺序。

Stainless steel composite pipe is made of two different stainless steels.This paper introduced the welding characteristics and heating treatment of stainless steel composite pipe,including groove type,controlling welding disalignment,welding seam repairing and inspecting,and wehler certification,welding process qualification,etc.When welding,it is designed with V type groove, welding by one side and both side forming fnr stainless steel composite pipe,the welding sequence is ＂composite layer welding--→transition layer welidng→base layer welding＂.