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Quantitative preparation method of novel three-texture magnesium alloy

A magnesium alloy and texture technology, which is applied in the field of quantitative preparation of new three-texture magnesium alloys, can solve the problems of difficult migration of twin crystal interfaces, remaining at the qualitative level, weak anisotropy, etc., and achieve simple and easy operation, The effect of easy operation and simple equipment

Active Publication Date: 2021-08-06
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as relatively high cost and complicated processes.
Improving the comprehensive performance of magnesium alloys by adjusting the texture is not limited to how to weaken the texture. In the prior art, magnesium alloys with multiple texture components usually show better plastic deformation ability and weaker anisotropy. , but the regulation of texture is still at the qualitative level
Also take into account The tensile twin interface has high thermal stability, and the twin interface is not easy to migrate. There is no technology to realize the quantification of multi-texture components such as three texture components in magnesium alloys from the perspective of controlling the amount of tensile twins. Preparation

Method used

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  • Quantitative preparation method of novel three-texture magnesium alloy
  • Quantitative preparation method of novel three-texture magnesium alloy
  • Quantitative preparation method of novel three-texture magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Commercial AZ31 magnesium alloy plates were homogenized at a temperature of 300°C for 2 hours. The homogenized plate is first rolled at room temperature along the (normal) ND direction, and the reduction is controlled within 8-10%, and then pre-compressed along the transverse direction (TD), with a reduction of 5.7%, and finally along the The rolling direction (RD) is pre-compressed twice, and the reduction is 2.5%. The strain rate is 10 -3 the s -1 . The diagram is attached figure 1 shown. After pre-deformation, annealing treatment is carried out at a temperature of 420°C for 4 hours to obtain a completely recrystallized structure. Among them, the mechanical performance curve is attached figure 2 As shown, the inverse pole figure image and the texture pole figure are shown in the attached image 3 a and attached Figure 4 as shown in a. Statistics show that texture I ( / / ND) accounts for 42%, texture II ( / / TD) accounts for 35%, and texture III ( / / RD) accounts ...

Embodiment 2

[0027] Commercial AZ31 magnesium alloy plates were homogenized at a temperature of 300°C for 2 hours. The homogenized plate is first rolled at room temperature along the (normal) ND direction, and the reduction is controlled within 8-10%, and then pre-compressed along the transverse direction (TD), with a reduction of 6%, and finally along the The rolling direction (RD) is pre-compressed twice, and the reduction is 4%. The strain rate is 10 -3 the s -1 . The diagram is attached figure 1 shown. After pre-deformation, annealing treatment is carried out at a temperature of 420°C for 8 hours to obtain a completely recrystallized structure. Among them, the mechanical performance curve is attached figure 2 As shown, the inverse pole figure image and the texture pole figure are shown in the attached image 3 b and attached Figure 4 as shown in b. Statistics show that texture I ( / / ND) accounts for 29%, texture II ( / / TD) accounts for 31%, and texture III ( / / RD) accounts for ...

Embodiment 3

[0029]Commercial AZ31 magnesium alloy plates were homogenized at a temperature of 300°C for 2 hours. The homogenized plate is first rolled at room temperature along the (normal) ND direction, the reduction is controlled within 8-10%, and then pre-compressed along the transverse direction (TD), the reduction is 1.9%, and finally along the The rolling direction (RD) is pre-compressed twice, and the reduction is 2.5%. The strain rate is 10 -3 the s -1 . The diagram is attached figure 1 shown. After pre-deformation, annealing treatment is carried out at a temperature of 420°C for 3 hours to obtain a completely recrystallized structure. Among them, the mechanical performance curve is attached figure 2 As shown, the inverse pole figure image and the texture pole figure are shown in the attached image 3 c and attached Figure 4 as shown in c. Statistics show that texture I ( / / ND) accounts for 53%, texture II ( / / TD) accounts for 17%, and texture III ( / / RD) accounts for 30%....

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Abstract

The invention discloses a quantitative preparation method of a novel three-texture magnesium alloy. The quantitative preparation method comprises the following steps of homogenization treatment, specifically, carrying out heat preservation on a magnesium alloy plate, enabling the homogenization treatment temperature to be 300 DEG C, performing heat preservation for 2 h, and then performing air cooling; a pre-deformation process, specifically, the pre-deformation process comprises three steps that firstly, rolling is conducted at the room temperature in the normal direction ND of a plate for a certain deformation quantity, the total rolling reduction is 8%-10%, and the rolling reduction in each pass is 2%; secondly, compression deformation is carried out in the transverse direction TD, wherein the plastic deformation is 2%-8%; and finally, secondary pre-compression is carried out in the rolling direction RD, wherein the compression amount is 2%-8%; and a heat treatment process, specifically, a deformed magnesium alloy bar is subjected to heat treatment under different conditions, in the first heat treatment process, a twin crystal interface is converted into a crystal boundary, and lattice orientation change parts caused by twin crystals are reserved; and secondly, the novel three-texture magnesium alloy with different texture component distributions is ensured to be uniform in crystal grain and similar in crystal grain size. By means of the quantitative preparation method, the magnesium alloy plate texture, namely the three-texture magnesium alloy, can be quantitatively regulated and controlled, and the plasticity of the three-texture magnesium alloy is improved.

Description

technical field [0001] The invention relates to a quantitative preparation method of a magnesium alloy, in particular to a quantitative preparation method of a novel three-texture magnesium alloy. Background technique [0002] As one of the lightest metal structural materials, magnesium alloy has a series of advantages such as high specific strength and specific stiffness and good damping performance. Compared with cast magnesium alloys, wrought magnesium alloys have obvious advantages in mechanical properties. However, after deformation of magnesium alloys, such as common rolling, a strong basal texture will be formed, and this component with a strong texture usually leads to anisotropy of the material, which makes magnesium alloys have unsatisfactory strength and plasticity Match, and reduce the formability of the material. At present, the control of texture focuses more on weakening the strong texture in magnesium alloys through various means, such as adding different r...

Claims

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Application Information

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IPC IPC(8): C22F1/06C21D1/26C21D8/02
CPCC22F1/06C21D1/26C21D8/0236C21D8/0221C21D8/0273C21D2201/05
Inventor 赵玲玉周倍安闫昌建金朝阳王见
Owner YANGZHOU UNIV