Magnesium / aluminum bimetallic part warm spray-heat spinning integrated forming method and device

By using a hot spray-spinning integrated forming method, the problems of easy corrosion and plastic deformation mismatch of magnesium/aluminum bimetallic parts in marine environments have been solved, achieving high-performance precision forming, which is suitable for the manufacture of complex-shaped parts.

CN117102823BActive Publication Date: 2026-06-02HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Filing Date
2023-09-28
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve high-performance precision forming in magnesium/aluminum bimetallic rotating parts, especially when they are used for long-term service in marine environments. Magnesium alloy parts are prone to corrosion, and conventional spraying methods result in low interfacial bonding strength and easy cracking. Furthermore, the plastic deformation capabilities of magnesium and aluminum are mismatched.

Method used

A hot spray-hot spinning integrated forming method is adopted, in which an aluminum alloy coating is deposited on the surface of a magnesium alloy slab by a supersonic high-temperature flame, and combined with hot spinning forming, the heating temperature is controlled at 300-600℃ to achieve metallurgical bonding and densification of the magnesium/aluminum alloy.

Benefits of technology

It improves the corrosion resistance and forming accuracy of magnesium/aluminum bimetallic parts, avoids thermal spraying oxidation and cold spraying porosity defects, enhances interfacial bonding strength, and is suitable for high-performance manufacturing of complex-shaped parts.

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Abstract

The application belongs to the technical field of magnesium / aluminum bimetallic part forming, and discloses a magnesium / aluminum bimetallic part warm spraying-thermal spinning integrated forming method and device. The method comprises the following steps: processing a magnesium alloy plate into a circular blank and arranging the circular blank on a main shaft of a spinning machine; forming a supersonic high-temperature flame; warm spraying and depositing aluminum alloy particles on the surface of the circular blank and synchronously heating and spinning the sprayed area; again warm spraying and depositing aluminum alloy particles, and heating and spinning simultaneously during the spraying and depositing to obtain a magnesium / aluminum bimetallic rotary part with a required coating thickness. The application can effectively improve the problem of serious mismatch of magnesium / aluminum alloy plastic deformation capacity when a coating is first sprayed and deposited and then hot spun, overcome the defects of poor interface organization performance and insufficient compactness of the sprayed and deposited aluminum alloy coating, and affect the corrosion resistance, and realize high-performance precise forming and manufacturing of the magnesium / aluminum bimetallic part.
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