Improved welding material with tolerance of liquid zinc and aluminiferous zinc-base alloy

Abstract

The invention relates to a welding material, in particular to an improved welding material which improves surfacing electrodes or flux-cored wires and resists the corrosion of liquid zinc and aluminium-zinc-based alloy. According to the portions by weight, the electrode coating or flux-cored wire of the welding material comprises the components as follows: 0.1-8 portions of graphite, 1-8 portions of rutile, 8-25 portions of marble, 9-30 portions of fluorite, 5-16 portions of feldspar, 1-5 portions of mica, 0.1-25 portions of chrome powders, 10-40 portions of ferrosilicon, 10-15 portions of ferromanganese, 10-20 portions of molybdenum powder, 0.1-15 portions of aluminium powder, 0.1-25 portions of nickel powder, 1-10 portions of titanium dioxide, 5-20 portions of ferrotitanium, 0.1-5 portions of rare earth, 0.1-15 portions of ferrotungsten, and 1-10 portions of ferroboron. By adopting the proposal of the invention, the usage temperature of the welding material is ranged from 480 to 550 DEG C; furthermore, the welding material of the invention effectively improves the anti-corrosion of zinc and the improved anti-corrosion of liquid zinc and aluminium-zinc-based alloy.

Description

technical field [0001] The invention relates to a welding material, especially an improved welding material resistant to corrosion of liquid zinc and aluminum-containing zinc-based alloys, which is improved for surfacing welding rods or flux-cored wires. Background technique [0002] As we all know, when the steel material is in contact with the zinc liquid, the liquid zinc and the steel matrix have physical and chemical effects. The elements in the steel and the alloying elements in the zinc solution have a very important influence on the zinc-iron reaction rate and the composition of the reaction product—the zinc-iron alloy phase. The classic theory of hot-dip galvanizing proposes that elements such as carbon, silicon, and phosphorus in steel have a great influence on the zinc-iron reaction. The larger the size, in order to reduce the corrosion of iron by the zinc liquid, generally use low-silicon, low-carbon steel or industrial pure iron to make zinc pots and structural ...

AI Technical Summary

Problems solved by technology

In order to improve the service life of the zinc pot and the structural parts in the pot, surfacing welding materials are needed to repair the surface corroded by the zinc liquid and the aluminum-containing zinc-based alloy. J422 low-carbon welding rod is used, its stability in the aluminum-zinc liquid is very unsatisfactory

[0003] On September 28, 2003, the applicant applied for a surfacing welding electrode that is resistant to corrosion of liquid zinc and aluminum-containing zinc-based alloys. There is good chemical stability in the alloy, and at the same time, the welding material has excellent welding process performance, which solves the problems existing in the prior art, but it is not ideal in preventing the corrosion of iron by zinc liquid at high temperature (>480°C). Because the hot-dip temperature is one of the most important factors affecting the corrosion of iron by zinc liquid, it is more and more urgent to develop zinc-corrosion-resistant welding materials with temperatures between 480°C and 550°C.

Images