Solder additive for brazing of high nitrogen steel

Abstract

Disclosed is a solder additive for brazing of high nitrogen steel. The solder additive is composed of a reinforcing agent, a water-based adhesive and a BJQ mixture in a mass ratio of 1:7 to 8:3 to 5,the reinforcing agent being nickel-plated graphene or vanadium-plated graphene or a mixture of the nickel-plated graphene and the vanadium-plated graphene in any mass ratio, the BJQ mixture being a mixture of barium glass powder, fumed silica and tartaric acid in a mass ratio of 1:3.5:1. When the additive of the present invention is added to the solder for brazing, the high nitrogen steel base material hardly melts, so that the nitrogen element is not lost, overcoming the pore defects of the conventional welding method, so that the nitrogen element has almost no loss; and because the high nitrogen steel base material hardly melts, that is, no deformation is caused, and the connection strength and mechanical properties of the joint are improved to a certain extent, and the welded joint is formed very well.

Description

technical field [0001] The invention relates to a brazing filler metal in the field of metal welding, in particular to a brazing filler metal additive for high-nitrogen steel brazing. Background technique [0002] High-nitrogen steel has properties such as corrosion resistance, oxidation resistance, wear resistance and excellent mechanical properties. These excellent properties make it one of the important materials in the manufacture of aviation, ship and weapon equipment, and welding technology determines its application scope. important process link. Due to the high nitrogen content of high-nitrogen steel itself, the welding porosity problem is often caused by the precipitation of base metal nitrogen during the welding process. The precipitation of nitrides in the heat-affected zone is a major loss of solid-solution nitrogen, and induces the appearance of other hard and brittle phases, thereby weakening the weld. Material properties, reducing the overall performance of w...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the difficulties in selecting the ratio of weld depth and width and the high In order to solve the serious problem of nitrogen element loss in nitrogen steel, the invention provides a brazing additive for high nitrogen steel brazing, by adding the reinforcing agent of the present invention into the brazing filler metal and then brazing the high nitrogen steel, high Nitrogen steel base material is almost non-melting, so that the nitrogen element is not lost, overcomes the shortcomings of the pores of the traditional welding method, makes the nitrogen element almost no loss, and improves the connection strength and mechanical properties of the joint to a certain extent, and the shape of the welded joint is very good