Improved welding workability by gas welder tip made of copper (Cu) and copper (Cu) alloy and electroless tin (Sn) plating on nozzle surface

摘要

In the present invention, the electroless tin (Sn) plating is improved by plating the inner and outer surfaces of gas welder tips and nozzles made of copper and copper alloys, thereby improving continuous welding workability for a long time. The purpose was to apply.;That is, when a silver tin plating film is formed on the inner holes of the tips and nozzles made of copper and copper alloys and on the outer surface of the copper, the molten metal dung ( The spatter) was hardly adhered, and it was easy to drop even if stuck, as the actual welding work. In particular, in the case of the tip, when the electroless tin (Sn) plating is applied, the tin (Sn) plated film is uniformly formed by penetrating not only the external surface but also the finely-diameter pores. The uniform tin (Sn) plated film in these holes softens the supply of the welding line and prevents the sticking of the large and small spatters or the penetration into the hole inlet so that the welding line is smoothly supplied to the characteristics of the base material. Continuous welding is possible without interruption for a limited service life.