A kind of environment-friendly welding wire without heavy metal and its production process

Abstract

The invention provides an environmentally friendly welding wire without heavy metals and a production process thereof. The semi-finished steel wire undergoes mechanical derusting, water washing, degreasing and derusting activation, water washing, passivation, water washing, surface adjustment, water washing, sealing, drying and lubrication. Fine drawing and winding make the outside of the steel wire coated with a non-metallic chemical film, eliminating the need for copper plating and reducing environmental pollution; during use, the welding operator can also be protected from the damage of copper-containing salt spray; the welding point does not contain Copper impurities, the welding seam is not easy to be eroded, the strength will not be reduced, and it has reliable arc stability; the average short-circuit transition time of the droplet is shorter than that of the copper-plated welding wire, and it can accept the sharp change of the wire extension length during welding, with stable performance. At the same time, under the premise of ensuring good wire feeding performance, it can reduce the wear of wearing parts such as contact tips, the welding torch hardly vibrates, and there is no iron filing clogging, thus reducing the consumption of spare parts.

Description

technical field [0001] The invention relates to the technical field of welding wires, in particular to an environment-friendly welding wire free of 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 welding wire and the welding tip, and reduce the friction with the wire feeding hose and the welding tip. In the production process, it is necessary to use sulfuric acid with a concentration of more than 15% for pickling, and a large amount of acid mist will be generated during heating. The production environment is harsh, and the copper-plated welding wire will also be polluted by heavy metals such as copper during the use process, which will cause great harm to the environment and operators. , and copper metal will have certain harm to th...

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.