Abstract: Process tests for remelting and cladding of ER347L stainless steel wires by tungsten inert gas arc (TIG)cold welding were carried out on surface of 1Cr17 stainless steel.The microstructure, microhardness and electrochemical corrosion property in 3.5wt% NaCl solution of the remelting layer and cladding layer were studied.The results show that for the TIG cold welding remelting, when the cold welding time was in the range of 200-150 ms, 150-100 ms, 100-50 ms, the required minimum cold welding current for obtaining well-formed remelting layer was 40, 70, 100 A, respectively.For the TIG cold welding cladding, when the cold welding time was 50, 100, 160, 200 ms, the required minimum cold welding current for obtaining well-formed cladding layer was 230, 190, 150, 120 A, respectively.The grains of heat affected zone (HAZ)formed in TIG cold welding remelting or cladding were not coarsened comparing with those of 1Cr17 stainless steel base metal, and the HAZ width did not exceed 250 μm.The microstructures of the remelting layer and cladding layer were finer than that of the base metal.The microhardness and corrosion resistance of the remelting layer and cladding layer were higher than those of the base metal.