Process method for reducing diffusion bonding temperature of titanium alloy through electro-deposition of Ni-Co nanocrystalline layer

Abstract

The invention relates to a process method for reducing titanium alloy diffusion bonding temperature through electro-deposition of a Ni-Co nanocrystalline layer, belongs to the technical field of titanium alloy low-temperature diffusion bonding, and aims to solve the technical problems that in the prior art, when titanium alloy is subjected to diffusion bonding, due to long-time heating, heat preservation and cooling, the diffusion bonding temperature of the titanium alloy is reduced; the titanium alloy low-temperature diffusion bonding process based on the titanium alloy surface nanocrystallization solves the problems that a plate subjected to diffusion bonding often has certain loss in the aspect of mechanical property compared with an original plate, and high energy consumption and long production period are also caused by the high diffusion bonding temperature, and the titanium alloy low-temperature diffusion bonding process based on the titanium alloy surface nanocrystallization is provided. Nanocrystallization of the surface of the titanium alloy is achieved through electro-deposition of a nanocrystalline coating, so that the oxidation corrosion resistance of an atomic diffusion channel and the alloy surface in the diffusion bonding process of the titanium alloy is improved, and diffusion bonding is conducted at the low temperature and the low vacuum degree to obtain the diffusion bonding joint strength meeting the use requirement. And an effective reference is provided for diffusion bonding of large-size parts under low-temperature and low-vacuum conditions.

Description

technical field [0001] The invention belongs to the technical field of low-temperature diffusion connection of titanium alloys, and in particular relates to a process method for reducing the temperature of diffusion connection of titanium alloys by electrodepositing a Ni-Co nanocrystalline layer. Background technique [0002] As a lightweight multifunctional structure, titanium alloy multilayer structural parts can not only meet the requirements of lightweight structural parts, but also provide enough space for the functionalization of structural parts. It has been widely used in the manufacture of hypersonic aircraft skins and engines. Important components are considered to be the most promising advanced lightweight super-tough materials, and are an important development direction of structural materials for aerospace. [0003] The traditional process temperature of titanium alloy diffusion bonding is 920°C. Diffusion bonding is performed at this temperature. Due to its lon...

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Problems solved by technology

[0004] The present invention aims to solve the problem that in the prior art, due to the long-time heating, heat preservation and cooling of the titanium alloy, the plate after diffusion bonding often has a certain loss in mechanical properties compared with the original plate, and the higher diffusion The connection temperature also brings the problems of high energy consumption and long production cycle, and then provides a process method for electrodepositing Ni-Co nanocrystalline layer to reduce the diffusion connection temperature of titanium alloy;

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