High-plasticity casting Mg-Sn-Zn-Al series magnesium alloy

A magnesium alloy, high plasticity technology, applied in the field of low-cost, high-plasticity casting magnesium alloys, can solve the problems of poor plastic deformation ability of cast magnesium alloys, and achieve the effects of low alloy cost, good plasticity and simple production process

Inactive Publication Date: 2012-02-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve the poor plastic deformation ability of existing cast magnesium alloys, and provide a new type of magnesium alloy with low cost, simple process, good plasticity and excellent comprehensive mechanical properties

Method used

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  • High-plasticity casting Mg-Sn-Zn-Al series magnesium alloy
  • High-plasticity casting Mg-Sn-Zn-Al series magnesium alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: A high plastic casting magnesium alloy containing Sn, Zn and Al elements, the alloy composition is: 3wt.%Sn, 1.5wt.%Zn, 1.5wt.%Al, the rest is Mg and unavoidable impurities .

[0024] First, preheat pure Mg, pure Sn, pure Zn and pure Al in a drying oven to about 120°C; then, put pure Mg in N 2 with SF 6 Put it into the crucible under the protection of mixed gas, adjust the temperature to 730°C after melting, put in pure Sn, pure Zn and pure Al, keep warm for 15 minutes, and stir to ensure that the alloy liquid is fully mixed; after stirring, let it stand After 15 minutes, when the temperature of the alloy melt is stabilized at 720°C, skim off the slag, and then pour it into a preheated metal mold to obtain a Mg-3wt.%Sn-1.5wt.%Zn-1.5wt.%Al alloy. The tensile strength of the alloy in this embodiment is 207MPa, and the elongation is 20.9%.

Embodiment 2

[0025] Example 2: A high-plastic cast magnesium alloy containing Sn, Zn, and Al elements, the alloy composition is: 5wt.%Sn, 3wt.%Zn, 2wt.%Al, and the rest is Mg and unavoidable impurities.

[0026] First, preheat pure Mg, pure Sn, pure Zn and pure Al in a drying oven to about 120°C; then, put pure Mg in N 2 with SF 6 Put it into the crucible under the protection of mixed gas, adjust the temperature to 730°C after melting, put in pure Sn, pure Zn and pure Al, keep warm for 15 minutes, and stir to ensure that the alloy liquid is fully mixed; after stirring, let it stand After 15 minutes, when the temperature of the alloy melt is stabilized at 720°C, skim off the slag, and then pour it into a preheated metal mold to obtain a Mg-5wt.%Sn-3wt.%Zn-2wt.%Al alloy. The tensile strength of the alloy in this embodiment is 237MPa, and the elongation is 18.4%.

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Abstract

The invention relates to a high-plasticity casting Mg-Sn-Zn-Al series magnesium alloy with low cost. The chemical formula and specific chemical components of the series alloy are as follows: Mg-xSn-yZn-zAl, wherein x is not less than 2.0 wt.% and not more than 7.0 wt.%, y is not less than 0.5 wt.% and not more than 6.0 wt.%, z is not less than 0.5 wt.% and not more than 6.0 wt.%, y+z is not less than 1.0 wt.% and not more than 7.0 wt.% and the balance is Mg. The alloy provided by the invention has substantive characteristics and obvious progresses; under a room temperature casting condition, the tensile strength of the series alloy can reach 210-240 MPa, and the elongation can reach 18-22%; and the alloy has the characteristics of higher strength, excellent plasticity, no need of thermal treatment, simplicity and reliability for preparation technique and easiness for popularization and application.

Description

technical field [0001] The invention relates to a low-cost, high-plastic casting magnesium alloy, which belongs to the category of light metal magnesium alloy materials. Background technique [0002] Magnesium alloy, as the lightest metal structural material in practical application at present, has the advantages of high specific strength, high specific stiffness, good electromagnetic shielding performance, good machinability and filling fluidity, and has already attracted attention in aerospace, communication equipment, automobile, etc. industry and other related fields. However, the crystal structure of magnesium alloy is hexagonal close-packed, and there is only a single slip system when deformed at room temperature, and the plastic deformation ability is poor, which limits the application of magnesium alloy to a large extent. Among the currently commonly used cast magnesium alloy series, the AZ series (such as AZ91) magnesium alloy has the best mechanical properties at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00
Inventor 陈云贵王卿肖素芬唐永柏
Owner SICHUAN UNIV
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