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Study on Welding Performance of Weathering Steel 5CuPCrNi

Zhang Mu (Shanxi Industry Vocational College, Xianyang 712000,China)  
Through chemical composition analysis, weld cracking test and mechanical performance test of butt joint, the welding properties of weathering steel 05CuPCrNi were inspected by means of CO2 gas shielded welding. The results of carbon equivalent analysis showed that the tendency of quench hardening and cold cracking was not obvious, so preheating welding was not required. The sensitive coefficient of cold cracking implied that the tendency of cold cracking was not obvious. The metallographic structure of butt joint and mechanical properties showed that the welded joint’s microstructure was normal and the mechanical performance was excellent, which could meet the engineering requirements by common welding methods. It could be concluded that the weathering steel 05CuPCrNi has good welding performance.
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