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The paper studies the twin wire butt welding of 6mm-thick T2 copper and Q235 steel plate by using the twin wire consisting of one copper-plated welding wire and one steel welding wire.According to the appearance detection,the weld joint gained is sound in shape without crackles,pores,incomplete fusion and other defects.As shown by the mechanical property,SEM and EDAX and in the metallographic analysis and test,the rupture position of copper-steel welded joint is located in the copper-part HAZ when the tensile strength reaches above 210MPa and Fe content of the welded joint involved in 1# test specimen reaches around 22.78%-26.75%,with the hardness achieving between 102～107HB and the weld structure being (α+ε) duplex solid solution.
The paper studies the twin wire butt welding of 6mm-thick T2 copper and Q235 steel plate by using the twin wire consisting of one copper-plated welding wire and one steel welding wire. Accredited to the appearance detection, the weld joint gained is sound in shape without crackles, pores, incomplete fusion and other defects. As shown by the mechanical property, SEM and EDAX and in the metallographic analysis and test, the rupture position of copper-steel welded joint is located in the copper-part HAZ when the tensile strength reaches above 210 MPa and Fe content of the welded joint involved in 1 # test specimen reaches around 22.78% -26.75%, with the hardness achieve between 102-107 HB and the weld structure being (α + ε) duplex solid solution.