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大口径工业纯钛管道封底双弧焊焊接方法,属于管道焊接技术领域,适用于各行业大口径(Φ≥600mm)钛材管道、设备及其它有色金属的根部焊接。将焊丝和焊件表面的油污和氧化物清理干净;将管道进行坡口加工;进行管道组对,组对间隙为1~2mm;钛管道内外两支焊枪共同作业对钛管道进行焊接,采用带保护拖罩的钨极氩弧焊枪,焊接时按焊接方向,焊枪喷嘴在前保护拖罩在后,外焊枪喷嘴氩气流量25L~30L/min,内焊枪喷嘴氩气流量15L~20L/min,外焊枪拖罩氩气流量25L~35L/min,内焊枪拖罩氩气流量25L~30L/min,外焊枪电流140~160A;具有容易控制焊缝成型质量,焊接速度快,是单弧焊焊接速度的3~5倍。节约能源和原材料等优点。
Welding method of double arc welding of large diameter titanium pipe
Large diameter of industrial pure titanium pipe back double arc welding welding method, belonging to the pipe welding technology, suitable for various industries of large diameter (600 mm) Φ acuity titanium pipe, equipment and other non-ferrous metal root welding.Clean the oil and oxide on the surface of the welding wire and welding parts;Groove processing of pipes;In the pipeline group, the interval is 1 ~ 2mm;Titanium pipe inside and outside the two torch assignments to welding of titanium pipes, together with belt protection cover of the tungsten electrode argon arc welding gun, welding in the welding direction and welding gun nozzle in former protection cover, the torch nozzle argon flow 25 ~ 30 l l/min, welding torch nozzle argon flow within 15 ~ 20 l l/min, the welding torch the argon gas flow drag cover 25 ~ 35 l l/min, the welding torch the argon gas flow drag cover 25 ~ 30 l l/min, the torch outside the current 140 ~ 160 a.It is easy to control the weld molding quality and fast welding speed, which is 3 ~ 5 times of welding speed of single arc welding.Saving energy and raw materials.