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A kind of high-strength and high-plasticity cast magnesium alloy and preparation method thereof

A technology for casting magnesium alloys and high plasticity, which is applied in the field of magnesium alloys and their preparation, high-strength and high-plasticity casting magnesium alloys and their preparation fields, can solve the problems of inability to meet the requirements of military and civil applications, and achieves high strength, plasticity, and refinement. Grain, easy-to-operate effect

Active Publication Date: 2019-08-13
WENXI COUNTY REGAL MAGNESIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of them focus on the research of wrought magnesium alloys. At the same time, among the series of cast rare earth magnesium alloys currently developed, their plasticity is often lower than 5%, which cannot meet the application requirements of military and civilian applications.

Method used

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  • A kind of high-strength and high-plasticity cast magnesium alloy and preparation method thereof
  • A kind of high-strength and high-plasticity cast magnesium alloy and preparation method thereof
  • A kind of high-strength and high-plasticity cast magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the percentage by weight of Zn 4.26%, Y 9.26%, Ca 0.48%, Mn 0.44%, proportioning the alloy, melting the ingot in a vacuum melting furnace, and feeding it with argon for protection. Among them, Zn and Y are added in the form of pure Zn, Mg-Y master alloy, Mg-Ca master alloy and Mg-Mn master alloy respectively; the mass fraction of Y in Mg-Y master alloy is 30%, and in Mg-Ca master alloy The mass fraction of Ca is 30%, and the mass fraction of Mn in the Mg-Mn master alloy is 3%. Keep warm at 820°C and stir with electromagnetic induction to fully melt the raw materials. After the alloy is completely melted, continue to stand at 750°C for 5 minutes. At the same time, the low-carbon steel metal mold was preheated to 250°C, and then a quick-drying high-temperature lubricating release agent was sprayed on the inner wall of the mold, and then poured to obtain the prepared sample. figure 1 It is the metallographic diagram of the cast magnesium alloy in this embodim...

Embodiment 2

[0028] According to the percentage by weight of Zn 4.47%, Y 9.31%, Ca 0.51%, Mn 0.66%, proportioning alloys, melting ingots in a vacuum melting furnace, and feeding argon for protection, the specific process is as in Example 1.

[0029] The tensile mechanical properties of the alloy were tested, and the test results showed that the alloy had good mechanical properties ( figure 2 ), the tensile strength is 270MPa, the yield strength is 205Mpa, and the elongation is 6.9%.

Embodiment 3

[0031] According to the percentage by weight of Zn 4.89%, Y 9.62%, Ca 0.49%, Mn 1.02%, proportioning alloys, melting ingots in a vacuum melting furnace, and feeding argon for protection, the specific process is as in Example 1.

[0032] The tensile mechanical properties of the alloy were tested, and the test results showed that the alloy had good mechanical properties, the tensile strength was 291MPa, the yield strength was 220Mpa, and the elongation was 10.2%.

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Abstract

The invention provides high-strength high-plasticity cast magnesium alloy and a preparation method thereof and belongs to the technical field of composites. Aiming at solving the technical problem, the following technical scheme is adopted: the high-strength high-plasticity cast magnesium alloy comprises the following elements by weight percent: 3-6% of Zn, 8-11% of Y, 0.4-0.6% of Ca, 0.5-1.5% of Mn, less than 0.1% of impurities and the balance of Mg, and the weight ratio of Y to Zn is (1.6-2.5):1. Through reasonably controlling alloy ingredients and the melting process, high strength and plasticity can be acquired without a heat treatment process. The process is simple, the transportability is strong, and the operation is easy. The high-strength high-plasticity cast magnesium alloy can be widely applied to the fields of aerospace, rail traffic and textile technology.

Description

technical field [0001] The invention relates to a magnesium alloy and a preparation method thereof, in particular to a high-strength and high-plasticity casting magnesium alloy and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Aerospace, new weapons and equipment, and the development of modern industry have put forward urgent requirements for lightweight structures. Therefore, magnesium and its alloys, as the lightest commonly used metal structural materials, have attracted more and more attention, and have been applied to a certain extent in the fields of national defense, aerospace, high-speed rail transportation, and electronic communications. However, due to the low strength of magnesium alloys, it is difficult to be widely used in load-bearing structural parts, especially the application of deformed magnesium alloys is still far behind steel and aluminum alloys, and its mechanical properties at room ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03
CPCC22C1/03C22C23/06
Inventor 鲁若鹏武立赵宇宏丁志兵程鹏其他发明人请求不公开姓名
Owner WENXI COUNTY REGAL MAGNESIUM
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