Material: ALCU Q303

Tools: WE53 third generation special liquefied gas porous spray gun.

Welding process:

1) Clean up the oil stain, dirt and insulating layer on the welding part of the welding metal to reveal the metallic luster.

2) For the welding parts required for tooling, it is generally recommended that the gap between the welding parts is 0.05-0. 1 mm, and a gas welding torch (oxyacetylene heat source), preferably a third-generation WE53 special porous spray gun, is used to burn liquefied gas alone, which will spray a wider flame belt, make the flame softer and make the parts more evenly heated. ) evenly heat the welded parent metal until the parent metal temperature rises to 300℃. The heating sequence is thick parts first and then thin parts, copper parts first and then aluminum parts.

3) When the welding temperature of the welding part reaches about 400 degrees, the weld seam should be filled at a certain welding angle (the angle should be that the molten welding wire is fully deposited on the welding part), and the base metal temperature must reach 400 degrees. When the solder to be welded forms a uniform weld at the welding position, the welding gun is removed and naturally cooled, and the whole welding process is completed. In this process, try not to burn ALCU-Q303 welding wire, because it is different from traditional welding wire. Its principle is to melt ALCU-Q303 through the heat conduction of the substrate. You can use the welding wire slightly burned at the end of the flame to flux, but don't burn the welding wire directly with fire.

4) No further treatment is needed after cooling, and the flux visible on the weld surface is non-corrosive. If possible, you can wipe it with a wire brush or a dry rag!