Nickel-based alloy welding wire has good performance of resistance to active gas, caustic medium, corrosion resistance to reducing acid medium, and has high strength, good plasticity, cold and hot deformation and processing and welding characteristics, therefore, widely used in petrochemical, metallurgy, atomic energy, marine development, aviation, aerospace and other industries, to solve the general stainless steel and other metals, non-metallic materials can not solve the engineering corrosion problem, is a very important corrosion-resistant metal material. Nickel-based alloys refer to alloys that are nickel-based and contain alloying elements and can resist corrosion in some media. When classified by its chemical composition, there are mainly nickel, nickel-copper alloys, nickel-molybdenum (nickel-molybdenum ferrolybdenum) alloys, nickel-chromium (nickel-chromium-iron) alloys, nickel-chromium-molybdenum (including nickel-chromium-molybdenum alloys and nickel-chromium-molybdenum copper alloys) and nickel-iron chromium (both iron-nickel-based alloys) and other categories. Pure nickel welding wire ERNi-1 is used to weld 200, 201 nickel alloy and nickel-plated steel plate; welding of steel and nickel dissimilar materials; Surface overlay welding of steel. Nickel-copper welding wire ERNiCu-7 Monel 400 alloy itself welding; and the welding of Monel 400 alloy with steel; Used for surfacing of steel. Nichrome welding wire ERNiCrFe-3 is used for welding dissimilar material welding of creep-resistant joints; – Welding of austenitic, ferritic steels and high nickel alloys, welding of alloy steels containing 9% nickel Nichrome welding wire ERNiCrFe-7 is used for welding alloys and surfacing welding of steel, especially suitable for the construction of nuclear reactors. Welding of nickel-chromium-molybdenum welding wire ERNiCrMo-3 INCONEL625, INCONEL825, INCONEL25-6Mo and MONEL400 alloys; – Welding between ultra-high strength austenitic steel and INCOLOY020 alloy; Welding between nickel-based alloys and stainless steel dissimilar materials; Hardfacing of steel