Copper-Plating Free Solid Wire Assembly for Gas-Shielded Arc Welding

摘要

A copper plating-free solid wire assembly for gas-shielded arc welding includes a spool, a contact tip, and a solid wire wound around the spool. The wire is composed of 0.03-0.10 wt % C, 0.45-1.05 wt % Si, 0.90-1.90 wt % Mn, less than 0.030 wt % P, less than 0.030 wt % S, and the remainder including Fe and impurities, and a cast diameter reduction ratio according to consumption of a wire, which is defined by the following equation, is equal to or less than 0.55: $\mathrm{Cast}-\mathrm{diameter}\mathrm{reduction}\mathrm{ratio}\mathrm{according}\mathrm{to}\mathrm{wire}\mathrm{consumption}=\frac{\mathrm{Cf}-\mathrm{Co}}{\mathrm{Cf}}$ where Cf represents the cast diameter of the wire wound around an upper portion of the spool, and Co represents the cast diameter of the wire wound around a lower portion of the spool.