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A kind of preparation method of low-alloyed high-strength plasticity magnesium alloy material

A magnesium alloy and low-alloy technology, applied in the field of magnesium alloy material preparation, can solve the problems of high alloy cost, high temperature deformation energy consumption, inability to guarantee strength and plasticity at the same time, etc., to reduce composition segregation, ensure material structure, enhance Effect of solid solution strengthening effect

Active Publication Date: 2021-07-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of the existing rare-earth magnesium alloy materials, such as the high cost of the alloy, the inability to ensure both strength and plasticity, and the high energy consumption of high-temperature deformation, and to provide a low-alloyed high-strength plastic magnesium alloy material. Preparation

Method used

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  • A kind of preparation method of low-alloyed high-strength plasticity magnesium alloy material
  • A kind of preparation method of low-alloyed high-strength plasticity magnesium alloy material
  • A kind of preparation method of low-alloyed high-strength plasticity magnesium alloy material

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specific Embodiment approach 1

[0029] Specific implementation mode 1: This implementation mode is a preparation method of a low-alloyed high-strength plastic magnesium alloy material, which is specifically carried out according to the following steps:

[0030] 1. Heat the pure magnesium block to 750°C~760°C in a protective atmosphere to reach a molten state. After the pure magnesium block is completely melted, add preheated Zn grains and preheated Mg-Y master alloy at the same time to obtain a ternary alloy Melt, vortex-free homogenization treatment for 3 minutes to 5 minutes to promote the uniform distribution of alloying elements. After non-eddy current homogenization treatment, evenly sprinkle a layer of covering agent on the surface of the molten metal to protect the molten metal from contact with air. The temperature is 720°C Stand at ~750°C for 10min-15min, add refining agent, refine the molten metal for 30s-40s at a temperature of 720°C-750°C and without eddy current homogenization treatment, and then...

specific Embodiment approach 2

[0037] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the protective atmosphere described in step one is CO 2 with SF 6 The mixed gas, where SF 6 The volume fraction is 5% to 6%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0038]Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, there is no vortex homogenization treatment for 3 minutes to 5 minutes to promote the uniform distribution of alloying elements. The stirring rate is 50 rpm to 100 rpm, and it is clockwise mechanical stirring . Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a low-alloyed high-strength plasticity magnesium alloy material, relating to a preparation method of the magnesium alloy material. The invention aims to solve the technical problems that the cost of the existing magnesium alloy material alloy is too high, the strength and plasticity cannot be guaranteed at the same time, and the high-temperature deformation energy consumption is large. The invention adopts the method of combining low alloying and low-temperature piercing deformation heat treatment to improve the mechanical properties of the magnesium alloy. Adding low-content zinc and yttrium can produce solid solution strengthening and grain refinement effects in the magnesium matrix, combined with low-temperature piercing deformation heat treatment, the magnesium alloy can produce more dispersed precipitation while grain refinement occurs during deformation phase, the resulting dispersion strengthening effect ensures that the strength and plasticity of magnesium alloy materials are greatly improved at the same time. Through the addition of low-content alloy elements and low-temperature piercing deformation heat treatment, the technological process is simplified, the production cost can be greatly reduced, and the market competitiveness of the alloy is improved. The invention is applied to the preparation of magnesium alloys.

Description

technical field [0001] The invention relates to a preparation method of a magnesium alloy material. Background technique [0002] Due to its low density and high specific strength and specific stiffness, magnesium is known as "the most potential metal material in the 21st century", but its absolute strength and plasticity are relatively low. Studies have shown that the strength and plasticity of magnesium alloys can be effectively improved by adding suitable alloying elements combined with reasonable thermal deformation. However, the addition of a large amount of alloying elements will cause a second phase that is not conducive to deformation and damage the plasticity; adding a small amount of alloying elements cannot produce obvious strengthening effects, especially the improvement of strong plasticity. Studies have shown that the addition of rare earth elements can produce solid solution strengthening and improve plasticity, but due to the relatively expensive price of ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C23/04C22F1/06B21C23/00B21J5/08
CPCB21C23/002B21J5/08C22C1/03C22C23/04C22F1/002C22F1/06
Inventor 聂凯波李亚楠邓坤坤杨安
Owner TAIYUAN UNIV OF TECH
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