Magnesium/aluminum alloy composite material and preparation process thereof

A composite material and preparation technology, which is applied in the coating process of metal materials, manufacturing tools, metal rolling, etc., can solve the problem that the lightweight of composite materials cannot meet the requirements, so as to improve the physical fitting point, improve the bonding strength, and achieve compactness. sex high effect

Active Publication Date: 2021-08-20
航天科工(长沙)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the zinc / zinc oxide transition layer is brittle, and the Al-Mn alloy layer and the aluminum layer are not substantially combined through the transition layer, and the lightweight of the composite material cannot meet the requirements

Method used

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  • Magnesium/aluminum alloy composite material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, 5052 aluminum alloy and AZ31 magnesium alloy plate are selected for composite. The AZ31 magnesium alloy plate of 10×200×300mm is subjected to plasma spraying treatment on one side. The first 25μm coating is sprayed with a power of 38kW, the spray distance is 115mm, and the main air flow is 40L / min; the last 35μm coating is sprayed with a power of 40kW and spray The spraying process with a distance of 100mm and a main air flow rate of 40L / min sprays a layer of 60um thick pure aluminum on the surface; sandblasts the surface of the 5052 alloy plate of 5×200×300mm to remove impurities and oil stains on the surface of the plate. The processed magnesium alloy plate and aluminum alloy plate are riveted together with 5052 aluminum alloy. Put the riveted plate into a heating furnace and keep it warm at 360°C for 1h. Carry out hot rolling, the reduction is 50%, and the rolling speed is 8m / min. After the first hot rolling, the plate is kept at 360°C for 15 minute...

Embodiment 2

[0038]In this example, 5052 aluminum alloy and AZ42 magnesium alloy plate are selected for composite. One side of the 10×200×300mm AZ42 magnesium alloy plate is subjected to plasma spraying treatment. The first 30μm coating is sprayed with a power of 40kW, the spraying distance is 120mm, and the main air flow is 40L / min; the last 40μm coating is sprayed with a power of 40kW and The spraying process with a distance of 110mm and a main air flow rate of 40L / min sprays a layer of 70um thick pure aluminum on the surface; the surface of the 5052 alloy plate of 5×200×300mm is sandblasted to remove impurities and oil stains on the surface. The processed magnesium alloy plate and aluminum alloy plate are riveted together with 5052 aluminum alloy. Put the riveted sheet into a heating furnace and keep it at 400°C for 1 hour; carry out hot rolling with a reduction of 60% and a rolling speed of 12m / min. After the first hot-rolled sheet is held at 400°C for 15 minutes , Carry out the secon...

Embodiment 3

[0040] In this example, 5052 aluminum alloy and AZ31 magnesium alloy plate are selected for composite. One side of the 20×200×200mm AZ31 magnesium alloy plate is subjected to plasma spraying treatment, the first 25μm coating is sprayed with a power of 40kW, the spraying distance is 125mm, and the main air flow is 40L / min; the last 35μm coating is sprayed with a power of 40kW, The spraying process with a distance of 105mm and a main air flow rate of 40L / min sprays a layer of 60um thick pure aluminum on the surface; sandblasting the surface of the 5052 alloy plate of 10×200×200mm to remove impurities and oil stains on the surface. The processed magnesium alloy plate and aluminum alloy plate are riveted together with 5052 aluminum alloy. Put the riveted plate into a heating furnace and keep it warm at 420°C for 1 hour; carry out hot rolling with a reduction of 75% and a rolling speed of 10m / min to a thickness of about 7.5mm. Thermal diffusion annealing was performed at 260°C for...

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Abstract

The invention discloses a magnesium / aluminum alloy composite material and a preparation process thereof. The preparation process comprises the following steps: S1, preparing materials, specifically, spraying the surface, to be compounded, of a magnesium alloy plate, and performing surface treatment on the surface, to be compounded, of an aluminum alloy plate so as to ensure that the surface is free of oxides, oil stains and impurities; S2, after the surfaces, to be compounded, of the magnesium alloy plate and the aluminum alloy plate are adhered, performing simple compounding and fixing on the whole body; S3, preheating the whole body in a furnace, and performing multi-pass hot rolling so as to obtain a composite material with a target thickness; and S4, performing thermal diffusion annealing treatment on the rolled plate. The surface of a magnesium alloy is treated by plasma spraying, an oxidation layer on the surface of the magnesium alloy is directly removed under the spraying action, and the process for removing the oxidation layer on the surface of the magnesium alloy is optimized; an aluminum melt at a high temperature is splashed to the magnesium alloy plate at a high speed and is fused with a part of the magnesium alloy plate so as to achieve metallurgical bonding, and strong bonding is formed under the permeation action at a high temperature.

Description

technical field [0001] The invention relates to the field of preparation of high bonding strength magnesium / aluminum alloy composite material, in particular to a high bonding strength magnesium / aluminum alloy composite material and a rolling process for the preparation. Background technique [0002] Magnesium alloy, known as "21st century green engineering material", has the advantages of low density, high specific strength / specific stiffness, good thermal conductivity and heat dissipation performance, and is widely used in aerospace, weaponry and other fields. However, the corrosion resistance of magnesium alloy is poor, and the surface protection process is relatively simple. In some harsh working environments, the protection of magnesium alloy cannot meet the requirements, and only aluminum alloy can be selected. At present, all equipment is developing towards the discovery of lightweight, especially in the field of aerospace, where weight reduction may be calculated in g...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B47/00B21B45/04B21B3/00B21B45/02C21D1/26C21D8/02C22F1/04C22F1/06C23C4/08C23C4/134C23F17/00B32B15/01B32B15/20
CPCB21B1/38B21B47/00B21B45/04B21B3/00B21B45/0269C21D1/26C21D8/0226C21D8/0278C21D8/0247C22F1/04C22F1/06C23C4/134C23C4/08C23F17/00B32B15/017B21B2001/383B21B2003/001
Inventor 刘海平程锐王明跃熊雯瑛曾刚
Owner 航天科工(长沙)新材料研究院有限公司
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