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Multi-element heat-resistant magnesium alloy and preparation method thereof

A magnesium alloy, heat-resistant technology, applied in the field of magnesium alloy, can solve the problems of poor mechanical properties at room temperature and high temperature, and achieve the effect of simple alloy melting and heat treatment process, uniform microstructure, solid solution strengthening and precipitation strengthening effect

Active Publication Date: 2018-06-29
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-component heat-resistant magnesium alloy, thereby solving the problem of poor room temperature and high temperature mechanical properties of existing magnesium alloys

Method used

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  • Multi-element heat-resistant magnesium alloy and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0024] The multi-component heat-resistant magnesium alloy of this embodiment is composed of the following components in weight percentage: Sm 5.5%, Sn 5%, Zn 4%, V 0.9%, and the balance is Mg and unavoidable impurities.

[0025] The preparation method of the multi-component heat-resistant magnesium alloy of the present embodiment adopts the following steps:

[0026] 1) Take pure magnesium ingots, pure zinc particles, pure tin particles, Mg-Sm master alloy and Mg-V master alloy according to the ratio, and place them in a drying oven at 200 ° C for 2 hours to dry and preheat;

[0027] 2) Put the preheated pure magnesium ingots, pure zinc particles, and pure tin particles in CO 2 , SF 6 The formed mixed gas (volume ratio is 99:1) is melted under protection, and when heated to 700°C, Mg-Sm master alloy and Mg-V master alloy are added and kept for 8 minutes. After the alloy is completely melted, the surface scum is removed, and the temperature is continued to Stir evenly after 73...

Embodiment 2

[0030] The multi-component heat-resistant magnesium alloy of this embodiment is composed of the following components in weight percentage: Sm 6%, Sn 3.5%, Zn 3%, V 1.0%, and the balance is Mg and unavoidable impurities.

[0031] The preparation method of the multi-component heat-resistant magnesium alloy of the present embodiment adopts the following steps:

[0032] 1) Take pure magnesium ingots, pure zinc particles, pure tin particles, Mg-Sm master alloy and Mg-V master alloy according to the ratio, and place them in a drying oven at 200 ° C for 2.5 hours to dry and preheat;

[0033] 2) Put the preheated pure magnesium ingots, pure zinc particles, and pure tin particles in CO 2 , SF 6 The formed mixed gas (volume ratio is 99:1) is melted under protection, and when heated to 690°C, Mg-Sm master alloy and Mg-V master alloy are added and kept for 12 minutes. After the alloy is completely melted, the surface scum is removed, and the temperature continues to rise to Stir evenly ...

Embodiment 3

[0036] The multi-component heat-resistant magnesium alloy of this embodiment is composed of the following components by weight percentage: Sm 6%, Sn 4%, Zn 4%, V 0.5%, and the balance is Mg and unavoidable impurities.

[0037] The preparation method of the multi-component heat-resistant magnesium alloy of the present embodiment adopts the following steps:

[0038] 1) Take pure magnesium ingots, pure zinc particles, pure tin particles, Mg-Sm master alloy and Mg-V master alloy according to the ratio, and place them in a drying oven at 210°C for drying and preheating for 2.5 hours;

[0039] 2) Put the preheated pure magnesium ingots, pure zinc particles, and pure tin particles in CO 2 , SF 6 The formed mixed gas (volume ratio is 99:1) is melted under protection, and when heated to 710°C, Mg-Sm master alloy and Mg-V master alloy are added and kept for 10 minutes. After the alloy is completely melted, the surface scum is removed, and the temperature is continued to Stir evenly af...

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Abstract

The invention relates to a multi-element heat-resistant magnesium alloy and a preparation method thereof. The multi-element heat-resistant magnesium alloy comprises, by weight, 5.5%-6.5% of Sm, 3.5%-5% of Sn, 2.5%-4% of Zn, 0.5%-1.0% of V, and the balance Mg and inevitable impurities. According to the multi-element heat-resistant magnesium alloy, the alloy is endowed with good aging precipitationstrengthening and solid solution strengthening effects by the Sm; the Sn is capable of forming a high-melting-point Mg2Sn intermetallic compound in the magnesium alloy, so that the effect of dispersion strengthening is achieved; the performance of a surface film can be improved by the Zn; and the V is added to enable the microscopic structure of the magnesium alloy to be obviously refined, and theeffect of fine grain strengthening can be achieved; The alloy elements mutually support one another and synergistically act in the above proportion range, the room temperature mechanical property andthe high-temperature mechanical property of the magnesium alloy are remarkably improved, the plasticity of the magnesium alloy is improved, and the application range of the magnesium alloy is expanded.

Description

technical field [0001] The invention belongs to the field of magnesium alloys, and in particular relates to a multi-element heat-resistant magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy has low density, high specific strength and specific stiffness, excellent performance in thermal and electrical conductivity, damping and shock absorption, electromagnetic shielding, product dimensional stability, etc., and is easy to process and recycle. It is currently used in the fields of automobiles, electronics and aerospace The application of metal is increasing day by day, and it is known as "green engineering metal in the 21st century". At present, commercial magnesium alloys can be basically divided into two categories: cast magnesium alloys and wrought magnesium alloys. [0003] Among the cast magnesium alloys, the AZ series is the most widely used due to its low price and good casting process, mainly AZ91 series and AM60 / 50 series,...

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 陈君李梅菊陈晓亚张清李全安张帅王颂博关海昆
Owner HENAN UNIV OF SCI & TECH
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