Non copper plating solid welding wire used for carbon dioxide gas protective arc welding

Abstract

The invention relates to a non-copper-coated solid welding wire for CO2 gas shielded arc welding. By controlling the 10-point average roughness (Rz) of the welding wire surface to 0.10-9.00 μm and the Vickers microhardness (Hv (1g)) of the welding wire surface to 125-310, the CO2 gas with excellent feedability is obtained. Non-copper-coated solid wire for shielded arc welding ensures that the amount of spatter is reduced when welding in the lower current area. Therefore, high-efficiency welding operations can be performed with high welding quality.

Description

technical field [0001] The present invention relates to a solid welding wire for carbon dioxide gas shielded arc welding, and the surface of the welding wire is not copper-plated; more particularly relates to a non-copper-coated solid welding wire for carbon dioxide gas shielded arc welding, by controlling the roughness and microhardness of the welding wire surface, Improve wire feedability or feedability. Background technique [0002] Recently, with the introduction of automated welding systems for carbon dioxide (CO 2 ) Solid wires for gas shielded arc welding have been widely used in many fields, especially steel structures, automobiles, ships and buildings. [0003] For CO 2 Solid wires for gas shielded arc welding usually use so-called copper-coated solid wires, in which copper is plated on the surface of the wire. The reason for copper plating is to improve electrical conductivity, wire feedability, and corrosion resistance. [0004] Due to the friction between the...

AI Technical Summary

Problems solved by technology

[0007] (1) The copper plating layer is softer than the surface of the welding wire. Due to the friction between the welding wire and the welding tip, the copper plating is inevitably peeled off from the surface of the welding wire, thus making the welding unstable;

[0008] (2) The melting point of copper is low, which is 1083°C, and it is easy to evaporate under the ultra-high temperature of the welding process, resulting in a large amount of smoke

During welding, poor feedability can increase arc length and cause welding current fluctuations, increasing the amount of spatter

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