High-strength cast magnesium alloy and preparation method thereof

A technology for casting magnesium alloys and magnesium alloys is applied in the fields of non-rare earth low-cost, high-strength casting magnesium alloys and their preparation, Mg-Bi-Al-Zn-Sr alloys and their preparation fields, and can solve problems such as increasing the cost of alloys and achieve Energy saving, low alloy cost, low price effect
CN105112751AActive Publication Date: 2015-12-02HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIV OF TECH
Publication Date
2015-12-02

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Abstract

The invention relates to a high-strength cast magnesium alloy. The high-strength cast magnesium alloy is an Mg-Bi-Al-Zn-Sr alloy and comprises components in percentage by weight as follows: 3wt%-8.0wt% of Bi, 0.5wt%-4.0wt% of Al, 0.1wt%-1.0wt% of Zn, 0.05wt%-0.15wt% of Sr and the balance of Mg. The Bi element is used as a main alloy element, a large quantity of Mg3Bi2 phases are formed through simple alloying means, a small quantity of aluminum and zinc elements are used for improving the strength of the alloy, so that the high-strength cast magnesium alloy is developed from the alloy series, and the alloy has the tensile strength of 276-296 MPa, the yield strength of 155-170 MPa and the elongation of 5.3%-7.3% and has mechanical properties comparable with those of rear earth magnesium alloys.
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Description

technical field

[0001] The invention relates to a non-rare earth low-cost high-strength cast magnesium alloy and a preparation method thereof, in particular to a Mg-Bi-Al-Zn-Sr alloy and a preparation method thereof, belonging to the field of metal materials and metallurgy. Background technique

[0002] Magnesium alloy is currently the lightest metal engineering structure material in practical application, and the density of pure magnesium is about 1.74g / cm 3 , its density is about 1 / 4 of steel, 1 / 3 of zinc, and 2 / 3 of aluminum alloy. Magnesium alloys have the characteristics of high specific strength, excellent mechanical cutting performance and damping and shock absorption performance, which meet the urgent needs of the modern automobile industry for weight reduction and environmental protection. Since the 1980s, with the rapid development of the automobile industry, a large number of magnesium alloy materials have been used in automobile parts, among which the commercial...

Claims

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