Method for preparing ultrathin aluminum-magnesium layered composite material through low-temperature rolling

A layered composite material, low-temperature rolling technology, applied in metal rolling, temperature control, metal rolling, etc., can solve the problems of low strength and low density, achieve high interface quality, low equipment requirements, and flexible application Effect

Active Publication Date: 2021-05-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the object of the present invention is to provide a preparation method of ultra-thin powder metallurgy aluminum-magnesium layered composite material, which can have both the advantages of powder metallurgy materials and the characteristics of rolling and compounding, and can effectively improve the uniformity of the structure of the material. Avoid defects such as composition segregation and inclusions, thereby preparing high-performance aluminum-magnesium layered composite materials, and can overcome defects such as low density and low strength of powder metallurgy materials

Method used

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  • Method for preparing ultrathin aluminum-magnesium layered composite material through low-temperature rolling
  • Method for preparing ultrathin aluminum-magnesium layered composite material through low-temperature rolling
  • Method for preparing ultrathin aluminum-magnesium layered composite material through low-temperature rolling

Examples

Experimental program
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Effect test

Embodiment 2

[0065] For example: preparation of 2A12-Al / AZ31-Mg layered composite sheet and strip with a thickness of 4mm;

[0066] According to the production method of the present invention, the 250~300 order spherical 2A12 aluminum alloy powders produced by Changsha Tianjiu Metal Materials Co., Ltd. and the 150 order irregular shape AZ31 magnesium alloy powders produced by Tuopu Metal Materials Co., Ltd. are used as raw material powder (its chemical composition In line with the provisions of GB / T3190). First, weigh the corresponding weights of 2A12 aluminum alloy powder and AZ31 magnesium alloy powder, and use a single-column or four-column hydraulic press to press and form 10mm thick billets under a pressure of 400MPa; then, under vacuum conditions (vacuum degree is 1*10 -1 ~1*10 -3 ), pressurize and sinter the aluminum alloy and magnesium alloy blanks at 550°C for 120min, and the sintering pressure is 10MPa; since the thickness of the aluminum alloy sintered blank and the magnesium a...

Embodiment 3

[0068] For example: prepare 1mm 6082-Al / AZ31-Mg layered composite sheet and strip;

[0069] Its preparation process is consistent with the process of Example 1, the difference is that the aluminum alloy powder raw materials are different. The overall tensile strength of the obtained sample is 315.8MPa, and the interfacial shear strength is 49.2MPa; the yield of the product is greater than or equal to 97%.

Embodiment 4

[0071] For example: prepare 0.8mm 2A12-Al / AZ61-Mg layered composite sheet and strip;

[0072] Its preparation process is consistent with the process of Example 1, the difference is that the magnesium alloy powder raw materials are different. The overall tensile strength of the obtained sample is 355.6MPa, and the interfacial shear strength is 51.9MPa; the yield of the product is greater than or equal to 97%.

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Abstract

The invention relates to a preparation method of an ultrathin aluminum-magnesium layered composite material, and belongs to the technical field of aluminum-magnesium composite materials. The preparation method comprises processes of aluminum alloy powder and magnesium alloy powder pressing and forming, presintering, composite rolling and post-treatment. When the aluminum alloy powder is presintered after being pressed and formed, a temperature is controlled to be 500-630 DEG C, and time is larger than or equal to 60 minutes; when the magnesium alloy powder is presintered after being pressed and formed, a temperature is controlled to be 500-630 DEG C, and time is more than or equal to 60 minutes; during composite rolling, a temperature is controlled to be 270-450 DEG C, preferably 275-350 DEG C, and during composite rolling, single-pass rolling reduction is 30-80%; and when the composite rolling temperature is lower than 310 DEG C, the single-pass rolling reduction is 40-80%. According to the preparation method of the ultrathin aluminum-magnesium layered composite material, the aluminum-magnesium layered composite material with excellent performance is obtained under a low-temperature condition (lower than 300 DEG C) for the first time. Meanwhile, the product yield is greatly improved under a low-temperature hot rolling condition.

Description

technical field [0001] The invention relates to a preparation method of an ultra-thin aluminum-magnesium layered composite material, belonging to the technical field of aluminum-magnesium composite materials. Background technique [0002] A single metal material is limited by its own characteristics and it is difficult to meet special performance requirements, while composite materials can realize the complementary properties of component materials, so that the overall material presents better physical, chemical and mechanical properties, which greatly expands the scope of materials. field of application. As common lightweight metal materials, aluminum alloy and magnesium alloy have overlapping application fields. Therefore, it is of great significance to carry out research on aluminum-magnesium composite materials and integrate the excellent properties of the two materials for the application fields of aluminum and magnesium materials. Aluminum-magnesium composite material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/38B21B47/00B21B37/74B21B37/46B21B3/00B22F3/02B22F3/14B22F3/24C21D1/26
CPCB21B1/38B21B47/00B21B37/74B21B37/46B21B3/00B22F3/02B22F3/14B22F3/24C21D1/26B22F2003/248B21B2201/06B21B2001/386B21B2003/006
Inventor 马运柱王涛杨伦刘超刘文胜黄宇峰伍镭颜焕元赵心阅
Owner CENT SOUTH UNIV
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