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Heat resistant magnesium alloy and preparation method thereof

A magnesium alloy, heat-resistant technology, applied in the field of magnesium alloy materials, can solve the problems of low thermal stability, poor high-temperature performance of the alloy, and limit the practical application of magnesium alloys, etc., and achieve the effect of good high-temperature strength

Inactive Publication Date: 2020-06-23
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However Mg 17 Al 12 The thermal stability of the phase is low, resulting in poor high-temperature performance of the alloy, which greatly limits the practical application of magnesium alloys.

Method used

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  • Heat resistant magnesium alloy and preparation method thereof
  • Heat resistant magnesium alloy and preparation method thereof
  • Heat resistant magnesium alloy and preparation method thereof

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Effect test

Embodiment 1

[0023] The components and mass percentages of the heat-resistant magnesium alloy provided in this example are: tin Sn 0.3wt.%, rare earth yttrium Y2wt.%, and the balance is magnesium Mg. It should be noted that due to the limitation of process conditions, there may still be some unavoidable impurities in the alloy.

Embodiment 2

[0025] The components and mass percentages of the heat-resistant magnesium alloy provided in this example are: tin Sn 0.4wt.%, rare earth yttrium Y 3wt.%, and the balance is magnesium Mg.

Embodiment 3

[0027] The components and mass percentages of the heat-resistant magnesium alloy provided in this embodiment are: tin Sn 0.5wt.%, rare earth yttrium Y 3wt.%, and the balance is magnesium Mg.

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Abstract

The invention relates to a heat resistant magnesium alloy and a preparation method thereof. The heat resistant magnesium alloy is a Sn3Y5 phase-containing Mg-Sn-Y alloy. The Sn3Y5 phase-containing Mg-Sn-Y alloy is prepared from the following components in percentage by weight: 0.3 to 0.7 percent of Sn, 2 to 5 percent of rare-earth yttrium and the balance of Mg. The preparation method comprises thefollowing steps of preparing materials, smelting, casting, homogenizing and performing hot extrusion. The heat resistant magnesium alloy is a deformed magnesium alloy which contains a nano-scale precipitated phase and a high-thermal stability enhanced phase (Sn3Y5). The alloy shows an abnormal temperature effect of compressive strength at the temperature below 200 and 250 DEG C; the compressive strengths are respectively 408 MPa and 448 MPa, which are far higher than the room temperature compressive strength 353 MPa; and meanwhile, excellent plasticity is maintained. Compared with other heatresistant magnesium alloy, the alloying element content is low, so that the heat resistant magnesium alloy has the advantage of low cost.

Description

technical field [0001] The invention mainly relates to a heat-resistant magnesium alloy and a preparation method thereof, belonging to the technical field of magnesium alloy materials. Background technique [0002] Due to the advantages of light weight, high specific strength, good damping performance, and environmental protection, magnesium and magnesium alloys have great application potential in aerospace and automotive industries. Although for industrial-grade Mg-Al-based alloys, such as AZ and AM series, they are widely used in the automotive industry due to their high strength, corrosion resistance, and die-castability. However Mg 17 Al 12 The thermal stability of the phase is low, resulting in poor high-temperature performance of the alloy, which greatly limits the practical application of magnesium alloys. Therefore, it is of great significance to develop new heat-resistant magnesium alloys. Contents of the invention [0003] The purpose of the present invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 曾迎钱晓英万杨杰杨秋荣孙可欣权高峰蒋斌
Owner SOUTHWEST JIAOTONG UNIV
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