Diffusion connection method between nickel-based high-temperature alloy ring-shaped piece and copper silver alloy

Abstract

The invention provides a diffusion connection method between a nickel-based high-temperature alloy ring-shaped piece and a copper silver alloy. The method comprises the steps of preparation of a high-temperature alloy ring-shaped piece and a copper silver alloy ring-shaped piece, preparation and assembling of a sheath, hot isostatic pressure pretreatment, hot isostatic pressure process control, post-treatment and the like. According to the diffusion connection method between the nickel-based high-temperature alloy ring-shaped piece and the copper silver alloy, the hot isostatic pressure diffusion connection technology is adopted, the copper silver alloy is subjected to diffusion connection with the high-temperature alloy ring-shaped piece in a high-temperature high-pressure environment, and a connection piece for the high-temperature alloy ring-shaped piece and the copper silver alloy ring-shaped piece is formed. By means of the method, connection between the high-temperature alloy andthe copper silver alloy is well implemented, stripping, chip off-falling and layering of a connection layer and separation of the connection layer from a base body are avoided, the porosity of the connection layer is lowered, and good metallurgical bonding is realized.

Description

Technical field [0001] The invention belongs to the processing and manufacturing field of nickel-based high-temperature alloys, and particularly relates to the diffusion connection of nickel-based high-temperature alloy ring parts and copper-silver alloys. Background technique [0002] Nickel-based superalloys have good chemical properties, high temperature oxidation resistance, corrosion resistance and fatigue resistance. In recent years, a large number of nickel-based superalloys with low expansion coefficient have been selected in China to make annular parts for turbine engines, such as the rear casing of the high-pressure compressor, the bearing ring, the insulation ring, the combustion chamber sealing ring, and the honeycomb. Seat and turbine outer ring, etc.; and rocket engine thrust combustion chamber, exhaust duct and collecting box. At the same time, with the development of the aerospace industry, new requirements have also been put forward for the structural and functi...

AI Technical Summary

Problems solved by technology

[0003] When the nickel-based superalloy is connected to the copper-silver alloy material, due to the difference in expansion coefficient between the materials, the traditional welding, brazing, and direct diffusion welding methods may cause the connection layer to peel off, fall off, delaminate, and separate from the substrate and connect. Problems such as high layer porosity

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