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Magnesium-aluminum alloy composite material and preparation process thereof

A composite material, magnesium-aluminum alloy technology, which is applied in the field of magnesium/aluminum alloy composite material preparation, can solve the problem that it is difficult to meet the user's requirements for diversified appearance and high quality, limited types of surface treatment colors, and difficulties in the surface treatment process of magnesium alloys, etc. problems, to achieve the effect of improving composite production efficiency, easy acquisition, and improving plasticity

Active Publication Date: 2021-08-17
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 3C product field has more and more urgent requirements for light weight and portability, but compared with aluminum alloy, the surface treatment process of magnesium alloy is more difficult, and surface treatment The variety of colors is limited, and it is difficult to meet the user's requirements for diversified appearance and high quality, so it limits the further use of magnesium alloy in the field of 3C products
Existing magnesium alloy and aluminum alloy hot-rolled compounding schemes mostly use interlayer metal layer or laying powder to reduce the influence of oxide layer on the compounding process, but the process is complex or has strict requirements on the environment (vacuum or gas protection), resulting in material compounding The efficiency of preparation is not enough, and it is not suitable for large-scale industrial production

Method used

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  • Magnesium-aluminum alloy composite material and preparation process thereof
  • Magnesium-aluminum alloy composite material and preparation process thereof
  • Magnesium-aluminum alloy composite material and preparation process thereof

Examples

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Effect test

Embodiment 1

[0032] In this example, 5052 aluminum alloy and AZ31 magnesium alloy plate are selected for composite. Firstly, the prepared 2×200×300mm 5052 alloy plate, AZ31 magnesium alloy plate, and 0.5×200×300mm tin plate are subjected to surface sandblasting to remove impurities and oil stains on the surface of the plate; Aluminum alloy riveting combination; put the riveted plate horizontally into the heating furnace, and ensure that the magnesium plate is on the bottom, and keep it at 360°C for 1 hour; carry out hot rolling, the reduction is 50%, and the rolling speed is 10m / min. After the first hot-rolled plate is kept at 360°C for 10 minutes, it is hot-rolled for the second time to a thickness of about 1 mm; it is kept at 280°C for 2 hours for thermal diffusion annealing.

Embodiment 2

[0034] In this example, 6061 aluminum alloy and AZ42 magnesium alloy plate are selected for composite. Firstly, the prepared 3×200×300mm AZ42 magnesium alloy plate, 2×200×300mm 6061 alloy plate and 0.5×200×300mm tin plate are subjected to surface sandblasting to remove impurities and oil stains on the surface of the plate; The sanded plates are riveted with 6061 aluminum alloy; put the riveted plates horizontally into the heating furnace, and ensure that the magnesium plate is on the bottom, keep warm at 380°C for 1 hour; carry out hot rolling, the reduction is 60%, rolling The speed is 12m / min. After the first hot-rolled plate is kept at 380°C for 10 minutes, it is hot-rolled for the second time to a thickness of about 0.8mm; it is kept at 280°C for 2h for thermal diffusion annealing.

Embodiment 3

[0036] In this example, 6061 aluminum alloy and AZ31 magnesium alloy plate are selected for composite. First, the surface of the prepared AZ31 magnesium alloy plate of 10×200×300mm, the 6061 alloy plate of 5×200×300mm and the tin plate of 0.5×200×300mm are subjected to surface sandblasting to remove impurities and oil stains on the surface of the plate; The sanded plates are riveted with 6061 aluminum alloy; put the riveted plates horizontally into the heating furnace, and ensure that the magnesium plate is on the bottom, and keep warm at 420°C for 1 hour; carry out hot rolling, the reduction is 70%, rolling The speed is 12m / min, rolled to a thickness of about 4.5mm; thermal diffusion annealing is carried out at 280°C for 2h.

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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 that S1, materials are prepared, specifically, the surfaces of a prepared composite magnesium alloy plate, an aluminum alloy plate and auxiliary materials are cleaned, and it is guaranteed that the surfaces of the materials are free of oxide, oil dirt and impurities; S2, the materials subjected to surface treatment are stacked, auxiliary materials are located between the magnesium alloy plate and the aluminum alloy plate, and simple composite fixing is conducted; S3, the materials are put into a furnace to be preheated to melt the auxiliary materials, and then multiple times of hot rolling compounding are conducted till the materials reach a target thickness; and S4, after rolling is completed, thermal diffusion annealing treatment is conducted. After the auxiliary materials with a lower melting point is preheated and melted, the auxiliary materials are uniformly laid on the surface of the magnesium alloy plate in a liquid state to protect the composite surface of the magnesium alloy plate from being oxidized, and the liquid auxiliary materials are extruded out after the plate enters a roller during rolling, so that the hot rolling composite forming of the non-oxidized magnesium plate and aluminum plate is ensured.

Description

technical field [0001] The invention relates to the field of preparation of magnesium / aluminum alloy composite materials, in particular to a magnesium-aluminum alloy composite material and a preparation process thereof. 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, 3C products and other fields. The density of magnesium alloy is only about 2 / 3 of that of aluminum alloy, which can better meet the requirements of lightweight products. Especially in the field of 3C products, 3C products have emerged along with the development of the electronics industry in recent years, mainly referring to computer, communication, and consumer electronic products. In the industry, the development of science and technology is changing with each passing day, and there are freq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00B21B45/00B21B3/00C21D1/26C21D8/02C21D9/00C22F1/04C22F1/06B32B15/01B32B15/20
CPCB21B1/38B21B47/00B21B45/004B21B3/00C21D1/26C21D9/0081C22F1/06C22F1/04C21D8/0247C21D8/0226C21D8/0278B32B15/017B21B2001/386B21B2003/001
Inventor 刘海平肖宏超王明旭康心锴张涛
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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