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Method for preparing and controlling second phase homogenization in high-aluminum-content cast-rolled magnesium alloy plate

A magnesium alloy and homogenization technology is applied in the field of second phase homogenization control and preparation in cast-rolled magnesium alloy sheets with high aluminum content, which can solve the problems of difficulty in plastic processing and forming of cast-rolled magnesium alloy sheets with high aluminum content, and achieve microstructure. The effect of uniformity, avoiding tiny cracks and strong docking

Inactive Publication Date: 2019-03-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of difficult plastic processing and forming of cast-rolled magnesium alloy plates with high aluminum content, and to provide a method for preparing the second phase homogenization in cast-rolled magnesium alloy plates with high aluminum content. The method adopts heat treatment and ordinary The combination of rolling, strong applicability, and barrier-free implementation in industrial production

Method used

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  • Method for preparing and controlling second phase homogenization in high-aluminum-content cast-rolled magnesium alloy plate
  • Method for preparing and controlling second phase homogenization in high-aluminum-content cast-rolled magnesium alloy plate
  • Method for preparing and controlling second phase homogenization in high-aluminum-content cast-rolled magnesium alloy plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Heating step solution treatment: the casting and rolling ATZ821 magnesium alloy billet is subjected to stage one solid solution, the solution temperature of stage one is 400°C, the holding time is 24h, and then the temperature is raised to carry out stage two solid solution, and the stage two solid solution The temperature is 430°C, the holding time is 16h, and the second phase is fully solid-dissolved;

[0027] (2) High-temperature multi-pass rolling deformation: carry out 10 high-temperature rolling deformations to the second-phase fully solid-solution billet described in step (1), and the reduction of each pass is 11%. Insulate for 10 minutes at a temperature of 350°C for a short time, and then roll to obtain a magnesium alloy plate;

[0028] (3) Multi-pass rolling deformation at lower temperature: the magnesium alloy plate described in step (2) is subjected to 2-pass cooling rolling deformation, the reduction of each pass is 13%, and the temperature of 300° C. ...

Embodiment 2

[0031] (1) Heating step solution treatment: the casting and rolling ATZ821 magnesium alloy billet is subjected to stage one solid solution, the solution temperature of stage one is 380°C, the holding time is 26h, and then the temperature is raised to carry out stage two solid solution, and the stage two solid solution The temperature is 400°C, the holding time is 18h, and the second phase is fully solid-dissolved;

[0032] (2) High temperature multi-pass rolling deformation: carry out 8 high-temperature rolling deformations to the second phase fully solid-solution billet described in step (1), the reduction of each pass is 15%, and each pass Hold the temperature for 9 minutes at 380°C for a short time, and roll to obtain magnesium alloy plates;

[0033] (3) Multi-pass rolling deformation with cooling: the magnesium alloy plate described in step (2) is subjected to 2-pass cooling rolling deformation, the reduction of each pass is 13%, and the temperature of 330° C. Under short...

Embodiment 3

[0036] (1) Heating step solution treatment: the casting and rolling ATZ821 magnesium alloy billet is subjected to stage one solid solution, the solution temperature of stage one is 350°C, the holding time is 28h, and then the temperature is raised to carry out stage two solid solution, and the stage two solid solution The temperature is 450°C, the holding time is 12h, and the second phase is fully solid-dissolved;

[0037] (2) High-temperature multi-pass rolling deformation: carry out 9 high-temperature rolling deformations to the second-phase fully solid-solution billet described in step (1), the reduction of each pass is 12%, and each pass Hold the temperature for 20 minutes at 300°C for a short time, and roll to obtain magnesium alloy plates;

[0038] (3) Multi-pass rolling deformation with cooling: the magnesium alloy plate described in step (2) is subjected to 3 passes of cooling rolling deformation, the reduction in each pass is 12%, and the temperature is 275°C before e...

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Abstract

The invention relates to a method for preparing and controlling a second phase homogenization in a high-aluminum-content cast-rolled magnesium alloy plate. The method comprises the following steps ofheating stepped solid solution treatment, high-temperature multi-pass rolling deformation, cooling multi-pass rolling deformation and recrystallization annealing treatment. By means of the method, a mesh-strip-shaped segregation second phase of a millimeter-scale size in an initial tissue is eliminated, a fine near-spherical second phase with uniform dispersion distribution is obtained, and the fine crystal structure is obtained at the same time. According to the method, a method combining heat treatment and common rolling is adopted, and no barrier is implemented in industrial production. Theproblem that the high-aluminum-content cast-rolled magnesium alloy is difficult to deform and serious in rolling cracking is solved, so that a magnesium alloy sheet material which is good in macroscopic morphology, uniform in microstructure and super-close in comprehensive performance is obtained.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a preparation method for homogenizing the second phase in cast-rolled magnesium alloy plates with high aluminum content. Background technique [0002] As the lightest metal material for engineering structures, magnesium alloy has the advantages of high specific strength, high electrical and thermal conductivity, high damping and shock absorption, high electrostatic shielding and good regeneration and recycling. It is widely used in aerospace, automobile and communication fields. favored. However, the difficulty of plastic forming has always been one of the most important problems restricting the development of magnesium alloys. In addition to the inherent hexagonal close-packed lattice structure of magnesium alloys, the size and distribution of the second phase are also important factors affecting the plastic forming of magnesium alloys. [0003] Magnesium plate is currently the ...

Claims

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Application Information

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IPC IPC(8): C22F1/06
CPCC22F1/06
Inventor 王慧远张少游王珵查敏马品奎李志刚宋家旺徐进杨治政张呈呈宁宏王通
Owner JILIN UNIV
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