Environment-friendly welding wire free of heavy metal and production process of environment-friendly welding wire

Abstract

The invention provides an environment-friendly welding wire free of heavy metal and a production process of the environment-friendly welding wire. A semi-finished steel wire is subjected to mechanicalrust removal, washing, oil and rust removal activation, washing, passivation, washing, surface adjustment, washing, sealing, drying, lubricating and fine drawing and winding, so that the steel wire is coated with a non-metal chemical film layer, a copper plating process is omitted, and environmental pollution is relieved; during use, a welding operator can be prevented from being damaged by copper-containing salt mist; a welding point does not contain copper impurities, a welding seam is not prone to being eroded, the strength is not reduced, and reliable arc stability is achieved; the average short-circuit transition time of molten drops is shorter than the time of copper-plated welding wires, sharp change of the extension length of the welding wire can be allowed during welding, and stable wire feeding performance is achieved; and meanwhile, on the premise that good wire feeding performance is guaranteed, abrasion of vulnerable parts such as a conductive nozzle can be reduced, a welding gun hardly vibrates, scrap iron blockage is avoided, and therefore, consumption of spare parts is reduced.

Description

technical field [0001] The invention relates to the technical field of welding wire, in particular to an environmentally friendly welding wire without heavy metals and a production process thereof. Background technique [0002] The traditional solid welding wire is coated with a layer of copper on the surface of the semi-finished steel wire, which can enhance the electrical conductivity, thermal conductivity and anti-corrosion ability of the contact between the welding wire and the welding tip, and reduce the friction with the wire feeding hose and welding tip. In the production process, sulfuric acid pickling with a concentration of more than 15% is required, and a large amount of acid mist will be generated when heated. The production environment is harsh, and the copper-plated welding wire will also be polluted by heavy metals such as copper during use, which will cause great harm to the environment and operators. , At the same time, copper metal will have certain harm to...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a heavy metal-free environmentally friendly welding wire and its production process to solve the problems of unstable quality, easy damage to the welding tip, and poor anti-corrosion ability of the existing copper-free welding wire.