Preparation method for low-alloyed high-strength plastic 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 temperature deformation energy consumption, inability to guarantee strength and plasticity at the same time, and high alloy cost, so as to improve mechanical properties, overcome inclusions and entrainment oxidation , the effect of reducing energy consumption

Active Publication Date: 2020-06-19
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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  • Preparation method for low-alloyed high-strength plastic magnesium alloy material
  • Preparation method for low-alloyed high-strength plastic magnesium alloy material
  • Preparation method for low-alloyed high-strength plastic 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 discloses a preparation method for a low-alloyed high-strength plastic magnesium alloy material, and relates to a preparation method for a magnesium alloy material, and aims to solve thetechnical problems that an existing magnesium alloy material is too high in cost, cannot simultaneously guarantee strength and plasticity, and is great in high-temperature deformation energy consumption. A way of combining low alloying with low-temperature upsetting and squeezing deformation thermal treatment can be adopted to improve mechanical property of a magnesium alloy. Low-content zinc andyttrium can be added, so that solution strengthening and grain refining effect is generated in a magnesium matrix; the solution strengthening and grain refining effect is combined with the low-temperature upsetting and squeezing deformation thermal treatment, so that the magnesium alloy can generate more diffuse precipitated phases while grain refining is generated in a deformation process, and the generated diffuse strengthening effect guarantees that strength and plasticity of the magnesium alloy material are greatly improved. Low-content alloy elements are added, and low-temperature upsetting and squeezing thermal treatment is adopted, so that processes are simplified, production cost can be greatly reduced, and market competitiveness of the alloy is improved. The preparation method isused for preparing the magnesium alloy.

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 Applications(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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