Copper-plating free solid wire assembly for gas-shielded arc welding

Abstract

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: <maths id=''MATH-US-00001'' num=''00001''> <MATH OVERFLOW=''SCROLL''> Cast - diameter  <mspace width=''0.8em'' height=''0.8ex'' / >  reduction  <mspace width=''0.8em'' height=''0.8ex'' / >  ratio  <mspace width=''0.8em'' height=''0.8ex'' / >  according  <mspace width=''0.8em'' height=''0.8ex'' / >  to  <mspace width=''0.8em'' height=''0.8ex'' / >  wire  <mspace width=''0.8em'' height=''0.8ex'' / >  consumption = Cf - Co 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.

Description

Technical field [0001] The present invention relates to a solid core welding wire assembly, in particular to a non-copper-plated solid welding wire assembly for gas shielded arc welding comprising a spool, a contact tip and a solid welding wire wound on the spool. Background technique [0002] The commonly used non-copper-plated solid wire for gas shielded arc welding has a diameter of 0.8-1.6mm. In order to improve the conductivity and corrosion resistance of the wire during welding, copper is plated on the surface of the wire. However, the copper-plated solid welding wire on the surface of the welding wire will peel off the copper plating layer due to friction in the Conduit Cable during welding. When the welding is carried out for a long time, the plating will be peeled off in the Conduit Cable. The copper powder clogs and increases the feeding resistance, which adversely affects the feedability of the welding wire and the arc stability. In addition, copper plating is performe...

AI Technical Summary

Problems solved by technology

[0009] However, the above-mentioned technologies have neglected the surface roughness of the welding wire, which is one of the most important elements of the wear resistance of the contact tip, and are particularly limited in reducing the wear of the contact tip of the welding wire wound on the bobbin.

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