A high bonding strength magnesium-aluminum composite thin plate belt differential temperature asynchronous rolling composite method

Abstract

The present invention provides a high-strength magnesium-aluminum composite thin plate differential temperature asynchronous rolling composite method, which adopts the method of uncoiling the magnesium and aluminum strip coils through a coiler in a warm state, and separates the magnesium and aluminum coils on-line according to the rolling composite requirements. Heating and supplementing the temperature, the plates are heated to different temperatures respectively. In order to prevent the oxidation of the heated plates and affect the bonding effect of the subsequent composite interface, the heating process of the blank is protected by an inert gas; in addition, the magnesium and aluminum strips are heated and then enter In the inert gas protection box, until it enters the rolling area; the rolling process adopts the differential temperature-asynchronous rolling method, which improves the deformation coordination of the two metals during the rolling process, and greatly improves the interface bonding between magnesium and aluminum plates strength; and fully consider the influence of residual stress on the combined strength and shape of the rolled plate, adopt the online multi-directional bending and micro-deformation method to roll the composite plate, which greatly weakens the effect of residual stress on the magnesium-aluminum composite plate peak.

Description

technical field [0001] The invention belongs to the field of magnesium-aluminum composite sheet rolling, and in particular relates to a high-bonding-strength magnesium-aluminum composite sheet strip temperature-differential asynchronous rolling composite method. Background technique [0002] Magnesium and magnesium alloys are currently the lightest metal structural materials in engineering applications. They have the advantages of high specific strength, high specific stiffness, good damping and shock absorption, good dimensional stability, good electromagnetic shielding, convenient machining, and easy recycling. Known as "the 21st century green engineering metal structure material". Magnesium and magnesium alloys have outstanding advantages in weight reduction of components, and are widely demanded in high-tech fields such as aerospace, automobiles, high-speed rail, and electronic 3C. However, the application rate of magnesium alloys is not high at present, and the applica...

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Problems solved by technology

[0004] 1. During the deformation process at the same temperature, the deformation of the magnesium-aluminum layer is uncoordinated, and the plate warpage is serious;

[0005] 2. During the forming process, the composite temperature of the single-layer sheet is relatively high / low, and at the same temperature, the sheet of another material is severely softened / poor in plasticity, and composite forming cannot be performed;

[0006] 3. After rolling and compounding, the interface strength between magnesium and aluminum layers is low, which cannot meet the subsequent forming requirements of the plate;

[0007] 4. After composite, the residual stress between the magnesium and aluminum layer plates is relatively large, and the composite plate / coil cracking phenomenon is serious after rolling

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