Magnesium alloy sheet forming property improving method based on twinning deformation

A technology of twin deformation and formability, which is applied in the field of improving the formability of magnesium alloy thin plates, can solve the problems of complex large deformation and limited improvement of formability, and achieve the effect of improving formability and improving formability

Active Publication Date: 2015-11-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the existing method for improving the formability of magnesium alloy sheet, complex large deformation needs to be implemented due to the mechanism of slip deformation, and the effect of formability improvement is very limited

Method used

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  • Magnesium alloy sheet forming property improving method based on twinning deformation
  • Magnesium alloy sheet forming property improving method based on twinning deformation
  • Magnesium alloy sheet forming property improving method based on twinning deformation

Examples

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Effect test

Embodiment 1

[0031] A method for improving the formability of a magnesium alloy sheet based on twin deformation, characterized in that it comprises the following steps:

[0032] 1) Collect or process a set of plane strain compression molds suitable for the plate to be processed or a set of molds that can prevent in-plane compression instability of the thin plate, such as figure 1 shown.

[0033] It is worth noting that, figure 1 A mold for realizing the purpose of the present invention is provided, and the mold includes an upper mold and a lower mold. The upper mold is composed of horizontal plates and vertical plates perpendicular to each other; the vertical section of the upper mold is a "T-shaped" plane; the upper end of the lower mold is provided with a rectangular groove; the rectangular groove along the horizontal direction Both ends pass through the side of the lower mold; the vertical plate of the upper mold fits the rectangular groove of the lower mold; the rectangular groove ca...

Embodiment 2

[0040] The basic steps of this embodiment are the same as those of Embodiment 1, except that compression is performed from two directions, including the following steps:

[0041] 1) Select a set of plane strain molds; figure 1 As shown, the plane strain compression mold includes an upper mold and a lower mold. The upper mold is composed of horizontal plates and vertical plates perpendicular to each other; the vertical section of the upper mold is a "T-shaped" plane; the upper end of the lower mold is provided with a rectangular groove; the rectangular groove along the horizontal direction The two ends pass through the side of the lower mold; the vertical plate of the upper mold fits with the rectangular groove of the lower mold.

[0042] 2) from the magnesium alloy thin plate to be processed (thickness 2.2mm identical with embodiment 1), block sample is taken; figure 2 As shown, the block sample cut in this embodiment is a rectangular sample, and its four sides are respecti...

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Abstract

The invention provides a magnesium alloy sheet forming property improving method based on twinning deformation, and belongs to the field of nonferrous metal plastic working. By means of the magnesium alloy sheet forming property improving method based on twinning deformation, compression deforming in a plane is conducted on a magnesium alloy sheet, a stretching twinning deformation mechanism is activated, the basal texture of the sheet is changed, and the forming property of the sheet is improved. The method comprises the following steps that 1, a plane strain mold or a mold preventing instability of compression in the plane is prepared; 2, compression deforming in the plane is conducted on the magnesium alloy sheet through the mold; 3, a pre-deformed sheet material is subjected to annealing treatment, a strain hardening effect is eliminated, and therefore a magnesium alloy sheet with improved forming property is obtained. The basal texture of the magnesium alloy sheet which is processed through the method is remarkably changed, the forming property is substantially improved, and reliable guarantee is provided for subsequent deep processing of magnesium alloy sheets.

Description

technical field [0001] The invention relates to the field of plastic processing of non-ferrous metals, in particular to a method for improving the formability of a magnesium alloy sheet. Background technique [0002] Magnesium alloys have the characteristics of high specific strength, good electromagnetic shielding performance, and excellent damping and shock absorption performance, and have great application potential in the fields of automobiles, aerospace, national defense, and electronic communications. Most magnesium alloys have a hexagonal close-packed structure (HCP), and there are few independent slip systems (twin systems) that are easy to start at room temperature. They are limited to basal plane slip systems and tensile twin systems, and are a material with poor room temperature plasticity. . In addition, magnesium alloy sheets prepared by rolling and other processes often have a strong basal texture, and the basal texture is not conducive to the activation of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/06
Inventor 何维均栾佰峰信运昌黄光杰刘庆
Owner CHONGQING UNIV
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