Welding wire for CO2 gas shielded welding with low spatter and good weld formation

By wrapping the welding wire with a copper plating layer and a conductive coating, especially a conductive coating made of nano-cerium oxide and conductive polyaniline, the problems of welding spatter and weld formation in carbon dioxide gas shielded welding are solved, and the stability of the welding process and the improvement of weld quality are achieved.

CN115582601BActive Publication Date: 2025-09-12SOUTHWEST FORESTRY UNIVERSITY
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Patent Information

Application Number
CN202211221354.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-08
Publication Date
2025-09-12
Estimated Expiration
2042-10-08

AI Technical Summary

Technical Problem

Existing carbon dioxide gas shielded welding wires have problems with large welding spatter and poor weld formation. In particular, the needle-shaped holes in the copper plating layer lead to unstable conductivity and welding current, and cannot effectively suppress the fine particle spatter generated by CO gas.

Method used

The structure adopts a solid welding wire wrapped with a copper plating layer and a conductive coating. The conductive coating is composed of nano-cerium oxide, conductive polyaniline, a curing agent and epoxy resin. It is treated with a coupling agent to enhance conductivity and corrosion resistance, inhibit CO generation and stabilize the welding current.

Benefits of technology

It effectively reduces welding spatter, improves weld formation quality, ensures welding current stability and excellent weld formation, and solves spatter and formation problems during welding.

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Abstract

The present invention belongs to the technical field of welding materials, specifically a carbon dioxide gas shielded welding wire with small welding spatter and good weld formation, comprising a solid welding wire, a copper-plated layer and a conductive coating, wherein the components of the conductive coating include, by mass percentage, 12%-18% of nano-cerium oxide treated with a coupling agent, 32%-38% of conductive polyaniline treated with a coupling agent, 8%-10% of a curing agent, and the remainder being epoxy resin. During the welding process, the surface lattice oxygen of the nano-cerium oxide in the coating activates oxygen molecules in the air, effectively suppressing the reaction of carbon dioxide and weld metal to generate carbon monoxide, resulting in small spatter during the welding process; the surface of the welding wire is wrapped with a copper-plated layer and a conductive coating, which greatly enhances its corrosion resistance (the conductive coating can seal the needle-shaped pores of the copper-plated layer), enhances the conductive effect of the welding wire and the welding gun conductive nozzle, stabilizes the welding current, and finally obtains an excellent weld formation; the present invention is an innovation in welding wire.
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