Welding of Copper and copper alloy clad steel plate ‚ The joint strength shall be guaranteed ‚ Corrosion resistance of composite layer ‚ Prevent the formation of copper-steel alloy weld and mechanical mixture at the interface of the transition layer when welding copper/steel ‚ At the same time, prevent the generation of welding cracks and pores in the copper clad layer. therefore ‚ When welding copper/steel composite plate ‚ The following requirements shall be met: ① When welding clad copper ‚ The selected welding material shall be able to effectively control the impurity content in the weld and improve the deoxidization ability of the weld ‚ Avoid the occurrence of hot cracks and pores in the weld ‚ Make the joint have good corrosion resistance; ② The composition of the welding wire in the transition layer shall be able to reduce the impurities and content of the weld ‚ Good deoxidization and impurity removal ‚ And it shall have good solid solubility with the base layer and the composite layer; ③ The welding material of base steel shall be selected according to the principle of equal strength ‚ To ensure that the joint strength meets the design requirements. The selection of welding materials for each part is shown in Table 2.