Magnesium / aluminum composite plate with synergistically improved strength and plasticity and preparation method of magnesium / aluminum composite plate

By performing insulation treatment of different temperatures on the magnesium plate, aluminum plate and titanium foil of the magnesium/aluminum composite plate at different temperatures and rolling and forming in large variables, the problems of inconsistent deformation and intermetallic compounds during the composite process are solved, and the synergistic improvement of the strength and plasticity of the composite plate and the improvement of the interface bonding performance are achieved.

CN119634439AActive Publication Date: 2025-03-18GUANGDONG INST OF NEW MATERIALS
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Patent Information

Application Number
CN202411866500.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-18
Publication Date
2025-03-18
Estimated Expiration
2044-12-18

AI Technical Summary

Technical Problem

During the composite process, the deformation of the magnesium/aluminum composite plate is not coordinated, resulting in poor interfacial bonding performance, and brittle intermetallic compounds are easily formed during the thermal processing, which weakens the strength and plasticity of the composite plate.

Method used

By insulating the magnesium plate, aluminum plate and titanium foil at different temperatures, a temperature gradient is formed to reduce the difference in deformation resistance. During the rolling process, the stacking order of aluminum plate/titanium foil/magnesium plate/titanium foil/aluminum plate and a large variable rolling process are used to inhibit the formation of intermetallic compounds and improve the interface bonding performance.

Benefits of technology

The strength and plasticity of magnesium/aluminum composite plate are achieved, the interface bonding performance is improved, the formation of intermetallic compounds is reduced, and the tensile strength and elongation of the composite plate are improved.

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Abstract

The invention relates to the technical field of bimetal layered composite materials, in particular to a magnesium / aluminum composite plate with synergistically improved strength and plasticity and a preparation method of the magnesium / aluminum composite plate. The preparation method comprises the steps that (1) the magnesium plate, the aluminum plate and the titanium foil are subjected to heat preservation treatment at different temperatures, the heat preservation temperature of the magnesium plate is higher than that of the aluminum plate, and the temperature difference between the magnesium plate and the aluminum plate ranges from 40 DEG C to 70 DEG C; the holding temperature of the titanium foil is lower than that of the aluminum plate, and the temperature difference between the titanium foil and the aluminum plate is 20-50 DEG C; and (2) the magnesium plate, the aluminum plate and the titanium foil which are subjected to heat preservation treatment are stacked according to the sequence of the aluminum plate / the titanium foil / the magnesium plate / the titanium foil / the aluminum plate, then one-pass large-variable rolling forming is conducted immediately, and the magnesium / aluminum composite plate is formed. The method not only can improve the tensile strength of the magnesium / aluminum composite plate, but also can improve the elongation of the magnesium / aluminum composite plate, so that the strength and plasticity of the magnesium / aluminum composite plate are synergistically improved.
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