A method for preparing high formability magnesium alloy sheet by composite deformation

A magnesium alloy and formability technology, applied in the field of composite deformation to prepare high formability magnesium alloy sheets, can solve the problems of poor room temperature formability, limited stamping performance, hindering the popularization and application of magnesium alloy sheets, etc. The effect of grain refinement and basal texture weakening

Active Publication Date: 2020-11-17
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the magnesium alloy sheet prepared by the technical scheme disclosed above has strong plasticity and high strength, it exhibits a strong basal texture, which will lead to poor formability at room temperature, and its stamping performance will be greatly limited, which will hinder the magnesium alloy sheet. Promotion and application of alloy plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this embodiment, an AZ31 magnesium alloy plate with a width of 60 mm and a thickness of 1 mm is used. The chemical composition and mass fraction of the alloy are: Al: 3%, Zn: 1%; Mn: 0.3%, and the rest is magnesium;

[0019] processing method:

[0020] 1) Pre-heat treatment: heat the magnesium alloy plate at 300°C for 3 hours, take it out and water cool it;

[0021] 2) The first rolling deformation: deform the plate by 3% in the transverse direction (TD), and the roll speed is 5r / min;

[0022] 3) Mid-term heat treatment: the plate after step 2) rolling treatment is kept at 300°C for 1 hour, and then water-cooled after taking it out;

[0023] 4) Compression deformation: the plate is compressed and deformed by 3% along the transverse direction (TD); the compression speed is 0.01mm / min;

[0024] 5) Post-stage heat treatment: after step 4), the plate after compression deformation is kept at 300°C for 1 hour, and then water-cooled after taking it out;

[0025] 6) The s...

Embodiment 2

[0029] In this embodiment, a Mg-Al-Sn magnesium alloy plate with a width of 60 mm and a thickness of 1 mm is used.

[0030] The chemical composition of the alloy is: Al: 1%wt, Sn: 1%, and the rest is magnesium;

[0031] processing method:

[0032] 1) Pre-heat treatment: keep the magnesium alloy plate at 350°C for 10 hours, take it out and cool it with water;

[0033] 2) The first rolling deformation: the plate is deformed 10% along the transverse direction (TD), and the roll speed is 20r / min;

[0034] 3) Mid-term heat treatment: the plate after step 2) rolling treatment is kept at 350°C for 1 hour, and then water-cooled after taking it out;

[0035] 4) Compression deformation: compress and deform the plate by 1% along the transverse direction (TD); the compression speed is 1mm / min;

[0036] 5) Post-stage heat treatment: after step 4), the plate after compression deformation is kept at 350°C for 1 hour, and then water-cooled after taking it out;

[0037] 6) The second rolli...

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Abstract

The invention relates to a method for preparing a high-formation-property magnesium alloy panel by composite deformation. According to the method, a compression deformation process is carried out between two rolling deformation processes, and thermal treatment is carried out before each rolling deformation process and the compression deformation process; a rolling process and a compression deformation process in different deformation directions are coupled, the grain orientation of a magnesium alloy sheet is adjusted and controlled, grains are refined, and the textures of base surfaces are weakened, so that the room-temperature cup drawing value of the magnesium alloy sheet is substantially increased after the composite deformation, and the room-temperature forming property of the deformedmagnesium alloy sheet is effectively improved.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a method for preparing high-formability magnesium alloy plates through composite deformation. Background technique [0002] Magnesium alloy is currently the lightest metal material in industrial applications. It has the advantages of excellent vibration damping performance and good electromagnetic shielding performance. It can partially replace steel, aluminum alloy and other profiles to meet the requirements of light and thin integration of products. The lightweight application of tools and 3C products is growing rapidly. [0003] Wrought magnesium alloys have good comprehensive mechanical properties, uniform structure and fine grains. At present, deformed magnesium alloy sheets are mainly produced by plastic processing such as extrusion and rolling. ZL201610957860.3 discloses a new method for the preparation and processing of high-performance alloy profiles, which discloses the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22F1/06B21B3/00
CPCB21B3/00C22C23/02C22F1/06
Inventor 杨青山潘虎成宋波柴炎福蒋斌
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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