Method for connecting nickel-based high-temperature alloy annular piece with copper-silver alloy through partial diffusion bonding

Abstract

The invention provides a method for connecting a nickel-based high-temperature alloy annular piece with copper-silver alloy through partial diffusion bonding. The method comprises the steps of nickel-based high-temperature alloy and copper-silver alloy preparation, package sheath preparation, assembling, hot isostatic pressure pretreatment, hot isostatic pressure process control, after-treatment and the like. The method for connecting the nickel-based high-temperature alloy annular piece with the copper-silver alloy through partial diffusion bonding adopts the hot isostatic pressure diffusionbonding technology, the copper-silver alloy is subjected to partial diffusion bonding with the nickel-based high-temperature alloy annular piece under the high-temperature high-pressure environment, and a partial connection annular piece of the nickel-based high-temperature alloy is formed. The method well achieves connecting of the nickel-based high-temperature alloy and the copper-silver alloy,connection layer disengagement, chip off-falling, and layering are avoided, the situation that the connection layer is separated from the substrate is avoided, the porosity of the connection layer isreduced, and good metallurgical bonding is achieved.

Description

technical field [0001] The invention belongs to the field of manufacturing nickel-based high-temperature alloy functional structural parts, in particular to the aspect of local diffusion connection between nickel-based high-temperature alloy ring parts and copper-silver alloys. Background technique [0002] Nickel-based superalloys have high strength, high cold and heat fatigue resistance, low expansion coefficient and constant elastic modulus, as well as good hot-working plasticity, cold forming and welding properties, and have been widely used in aerospace and energy fields. However, with the development of materials and processes, new requirements have been put forward for the integration of structure and function of nickel-based superalloy materials. In the case of satisfying the structure and strength, nickel-based superalloys also need to be combined with other materials to achieve functional integration. When the nickel-based superalloy is connected to the copper-sil...

AI Technical Summary

Problems solved by technology

When the nickel-based superalloy is connected to the copper-silver alloy material, traditional welding, brazing, and direct diffusion welding methods are used, and there are problems such as peeling off of the connection layer, loss of blocks, delamination, separation from the substrate, and high porosity of the connection layer.

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