The Influence of Welding Angle for the Joints Mechanical Properties with MSHS Vertical Rods

Manual self-propagating high-temperature synthesis welding attracts many researchers’ interest due to the special advantages of which in the field emergency recovery service. The welding technic has a great consuming effect to the joint microstructure and mechanical property when render a vertical welding for the Q235 steel sheet with the SHS rods which its ingredient has been optimized. In this paper, in allusion to the feature of the SHS rod, the effect of the welding angle for the joint microstructure and mechanical property was researched with the metallographic analysis and test of mechanical property. The results show that the adnexed metal ratio of rod, the weld crater of base metal and the tensile-strength of joints will be altered as the change of the welding angle, meanwhile, the pattern of joint microstructure will have a corresponding change either. Keywords-SHS; welding angle; vertical welding; microstructure; mechanical properties