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Credibility ,(2) Semi-automatic welding of CO2 gas protection With the improvement of the characteristics of the welding power source, the splash problem of CO2 gas shielded arc welding has been fundamentally dealt with after controlling droplets and arc patterns, and has begun to play an important role in pipeline welding, such as STT type CO2 inverse. Variable welding machine applications. This kind of welding method is sensitive to operation, welders are easy to control, have strong conformability to different grooves, good welding quality, high welding efficiency, and weld bead lubrication, but the welding process is greatly affected by the ambient wind speed. The STT semi-automatic root welding request nozzle group insists on the average disagreement of the counterpart gap during the process, otherwise it will produce defects such as the edge of the groove not being fused and the slag inclusion in the subsequent filling and capping bead.
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