Low-temperature diffusion welding method for magnesium alloy and magnesium alloy connector

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By forming a dense metal coating on the surface of the magnesium alloy and performing surface self-nanoization treatment, combined with discharge plasma sintering technology, the poor connection problem caused by the oxide film in magnesium alloy welding is solved, and the low temperature, high efficiency and high strength welding effect is achieved.

CN120395090APending Publication Date: 2025-08-01HARBIN INST OF TECH

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Patent Information

Application Number: CN202510706832.3
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2025-05-29
Publication Date: 2025-08-01

Application Information

Patent Timeline

29 May 2025

Application

CN202510706832.3

01 Aug 2025

Publication

CN120395090A

IPC: B23K20/00; B23K20/24; B23K20/16; B23K103/08

CPC: B23K20/001; B23K20/24; B23K20/16; B23K2103/15

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Application Domain

Welding/soldering/cutting articles Non-electric welding apparatus

Technology Topics

Metal coating Metallic materials

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AI Technical Summary

Technical Problem

Magnesium alloys are prone to form oxide films during welding, resulting in poor connections and affecting the strength and sealing of the welds. It is difficult for the prior art to effectively remove oxide films, resulting in poor welding results.

Method used

Cold spraying of metal powder is used to form a dense metal coating, combining surface self-nanoization treatment and discharge plasma sintering technology to prepare a gradient surface structure to achieve low-temperature diffusion welding.

Benefits of technology

Achieve efficient and high-strength small deformation welding at low temperatures, avoiding the obstacles of the oxide film and improving the metallurgical bonding strength and reliability of the welded joints.

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Abstract

The invention relates to the technical field of metal material connection, in particular to a magnesium alloy low-temperature diffusion welding method and a magnesium alloy connector, and the magnesium alloy low-temperature diffusion welding method comprises the steps that metal powder is adopted to conduct cold spraying on the surfaces of two magnesium alloys to be welded, a metal coating is formed on the surface of each magnesium alloy to be welded, and the metal powder comprises at least one of copper powder, nickel powder, titanium powder and silver powder; carrying out surface self-nanocrystallization treatment on the metal coating of each magnesium alloy to be welded; and diffusion welding is conducted on the two to-be-welded magnesium alloys subjected to surface self-nanocrystallization treatment through the spark plasma sintering technology. The method aims at solving the problem that the welding effect of the magnesium alloy is affected due to the existence of an oxidation film.

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