A method for brazing inner holes of ultra-high strength steel and tungsten alloy

Abstract

The invention discloses an ultrahigh-strength steel and tungsten alloy inner hole brazing method. The method comprises the following steps of: tailoring a brazing sheet, fixing the brazing sheet to the outer surface of a liner, wherein the liner can be wrapped by the brazing sheet to be placed in an inner hole of a shell, putting a combination of a shell and the liner filled with the brazing sheetin a brazing furnace, setting the brazing temperature to be above the brazing sheet melting point, heating the brazing sheet continuously for a period of time, wherein the brazing sheet is fully melted, and the brazing sheet fully fills the gap between welding surfaces of the liner and the shell to finish a normalizing process; performing annealing processing on the combination of the shell and the liner filled with the brazing sheet; and raising the temperature of the brazing furnace till the brazing material is melted, and quenching an ultrahigh-strength steel and tungsten alloy weldment. The method provided by the technical scheme combines high-temperature brazing, quenching and tempering, so that a special material brazing process and a shell material thermal treatment are combined fully to obtain a high-strength high-welded-rate brazing joint and meanwhile, the high strength and toughness of the shell are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of welding manufacturing technology, and in particular relates to a brazing method for inner holes of ultra-high-strength steel and tungsten alloy. Background technique [0002] Brazing technology is a process of heating and melting brazing material to connect two or more metal parts; it uses brazing material with a lower temperature than the base metal, and connects the base metals together after melting. After heating, the liquid solder wets, capillary flows, fills, spreads, and interacts with the base metal in the gap of the base metal. During the above process, the melted solder and the base metal dissolve, diffuse or produce intermetallic compound, which condenses to form strong joints, thereby joining the base metals together. The brazing deformation is small, and the joint is smooth and beautiful. It is suitable for welding precision, complex and components composed of different materials, such as ho...

AI Technical Summary

Problems solved by technology

The method of the technical solution of the present invention aims at the situation that brazing in the prior art is difficult to meet the welding requirements of ultra-high-strength steel and tungsten alloy, adopts a brazing filler metal with a better matching degree with the heat treatment parameters of ultra-high-strength steel, and brazing Quenching and tempering the shell after completion; through the combined application of brazing and heat treatment processes, the welding problem between ultra-high-strength steel and tungsten alloy can be effectively solved

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