Study on the application of plasma-MAG hybrid welding Q960 steel
This paper introduces an industrial application case of plasma-MAG hybrid heat source welding tech-nology for medium and thick plate welding.From the research results,it is shown that plasma-MAG hybrid welding can be implemented for batch welding of medium and thick plate high-strength steel.For low carbon steel and low alloy steel 8 mm and below,plasma-MAG hybrid welding can be completed without a groove.Guaranteed to be within the range of 0～1.2 mm,a weld gap of this size can ensure the complete penetration of the 12 m long straight weld and the aesthetic shape of the front and back sides of the plasma-MAG hybrid weld.Upon matching with welding wire,the same Q960 steel will boast a slightly higher tensile strength of the welded joint by the plasma-MAG hybrid welding than that of ordinary MAG welding.The low temperature impact tough-ness of the plasma-MAG hybrid welding at-40 ℃ is slightly lower than that of the ordinary MAG joint.
plasma-MAG hybrid weldingmedium and thick plate weldingindustrial applicationQ960 steelperformance of welded joint
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