Method for manufacturing bright aluminum alloy welding wire

Abstract

The invention discloses a method for manufacturing a bright aluminum alloy welding wire, which comprises the steps of burdening, smelting, casting, scraping, broaching, annealing and cleaning, wherein the annealing step is to, after heating a drawn wire to 300 to 490 DEG C for 30 and keeping the temperature for 90 minutes in a protective environment of inert gases, cool a drawn wire first with heavy wind and then with sprayed water when the temperature drops to 230 to 280 DEG C. The method has the characteristics that: 1, electrical heating strong circulation diversion is adopted, and strongly cooling annealing is performed under the protection of the inert gases, so that the surface oxidation of magnalium magnesium is stopped, and the scraping for eliminating an oxidation film on the surface of the welding wire after the annealing is left out; and 2, under the protection of the inert gases, the strongly cooling annealing can effectively prevent hard and brittle phases of high magnalium from being separating out, so that an alloy structure is improved, the quality and process plasticity of the welding wire are improved, and the probability of broken wires in the process of welding the welding wire is reduced.

Description

technical field [0001] The invention relates to an aluminum alloy welding wire and a manufacturing method thereof, and more particularly to a manufacturing method of a bright aluminum alloy welding wire. Background technique [0002] With the development of lightweight and high-speed railway transportation vehicles, aluminum alloy profiles and plates have gradually replaced steel plates or stainless steel plates for high-speed train carriages. For the corresponding long plates, especially the ultra-long aluminum alloy profiles, advanced advanced Automated welding. [0003] The current aluminum alloy welding wire is generally made of aluminum-magnesium alloy welding wire. The national standard for "aluminum and aluminum alloy welding wire" (GB / T10858- 2008) on page 3, the chemical composition of several types of aluminum alloy welding wires is disclosed, such as the chemical composition (mass fraction)% of the aluminum alloy welding wire with model SA15356 [chemical composit...

AI Technical Summary

Problems solved by technology

Due to the annealing of the ordinary furnace annealing, the cooling is slow during the annealing process. On the one hand, since aluminum and magnesium are active metals, the surface is oxidized normally when cooled in the air. The existing means eliminate the oxidation on the surface of the welding wire by scraping film, and scraping the surface of the welding wire will produce a large amount of aluminum alloy debris, which will affect the yield, which will not only increase the production cost of aluminum alloy welding wire, but also reduce the production speed

On the other hand, normal cooling in air is also prone to precipitation of hard and brittle phases of high-magnesium aluminum alloys, which affects the alloy structure, affects the plasticity of the welding wire process, and increases the probability of wire breakage during welding