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High-uniform-elongation high-work-hardening non-rare-earth magnesium alloy and preparation method thereof

A work-hardening and magnesium alloy technology, applied in the field of high uniform elongation and high work-hardening non-rare earth magnesium alloy and its preparation, can solve the problems of low uniform elongation of Mg-Al-Ca alloy, and achieve low preparation cost and low melting point Effect

Active Publication Date: 2020-10-02
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the Mg-Al-Ca alloy prepared by the above prior art still has the problem of low uniform elongation

Method used

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  • High-uniform-elongation high-work-hardening non-rare-earth magnesium alloy and preparation method thereof
  • High-uniform-elongation high-work-hardening non-rare-earth magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]High uniform elongation and high work-hardening non-rare earth magnesium alloy, the elemental composition of which is aluminum Al: 6 wt.%, calcium Ca: 1 wt.%, and the rest is magnesium Mg and unavoidable impurities.

[0037] (1) casting

[0038] First, preheat the pure magnesium ingot, pure aluminum ingot and magnesium-calcium master alloy in a drying box to about 200°C; then, put the pure magnesium ingot in 99vol.%CO 2 and 1vol.%SF 6 Put it into the crucible under the protection of the mixed gas. After the magnesium ingot is completely melted, put the pure aluminum ingot and the magnesium-calcium intermediate alloy in the crucible; raise the temperature of the melt to 750 ° C for 15 minutes, and then stir for 2 minutes to ensure that the alloy solution is fully Mixing; the melt is left to stand for 10 minutes, then the refining agent is added and stirred for 2 minutes to remove the surface residue obtained after refining, and then the melt is kept at 750°C for 15 minut...

Embodiment 2

[0045] High uniform elongation and high work-hardening non-rare earth magnesium alloy, the elemental composition of which is aluminum Al: 3 wt.%, calcium Ca: 1 wt.%, and the rest is magnesium Mg and unavoidable impurities.

[0046] (1) casting

[0047] First, preheat the pure magnesium ingot, pure aluminum ingot and magnesium-calcium master alloy in a drying box to about 200°C; then, put the pure magnesium ingot in 99vol.%CO 2 and 1vol.%SF 6 Put it into the crucible under the protection of the mixed gas. After the magnesium ingot is completely melted, put the pure aluminum ingot and the magnesium-calcium intermediate alloy in the crucible; raise the temperature of the melt to 750 ° C for 15 minutes, and then stir for 2 minutes to ensure that the alloy solution is fully Mixing; the melt is left to stand for 10 minutes, then the refining agent is added and stirred for 2 minutes to remove the surface residue obtained after refining, and then the melt is kept at 750°C for 15 minu...

Embodiment 3

[0073]Compared with Example 1, most of them are the same, except that in this example, the mass content of each element component is adjusted to: Al 4.0%, Ca 0.8%, and the rest is Mg.

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Abstract

The invention relates to a high-uniform-elongation high-work-hardening non-rare-earth magnesium alloy and a preparation method thereof. The high-uniform-elongation high-work-hardening non-rare-earth magnesium alloy is prepared from the following elements, in percentage by weight, 3.0%-6.0% of Al, 0.5%-1.0% of Ca and the balance Mg. Compared with the prior art, the grain size of the prepared non-rare earth magnesium alloy bar is 10-30 microns, the alloy tensile strength is larger than 245 MPa, the yield strength is larger than 125 MPa, the maximum elongation is 27%, and the uniform elongation exceeds 20%; and the work hardening capacity (tensile strength-yield strength) and the uniform elongation of the material are obviously higher than those of any existing non-rare-earth magnesium alloy.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy material manufacture, and relates to a non-rare earth magnesium alloy with high uniform elongation and high work hardening and a preparation method thereof. Background technique [0002] As the lightest metal engineering structural material, magnesium alloy has the advantages of high specific strength and specific stiffness, and has broad application prospects in the fields of electronic products and automobile industry. The most prominent advantage of magnesium alloy is light weight, the density of pure magnesium is 1.74g cm 3 , equivalent to 2 / 3 of aluminum and 1 / 4 of steel. If magnesium is widely used, it will effectively alleviate the two major problems of environmental pollution and energy depletion faced by today's society. In addition, magnesium resources are abundant, the content in the earth's crust is about 2.7%, second only to aluminum and iron, and there is inexhaustible magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/02C22F1/06
CPCC22C1/02C22C23/02C22F1/06
Inventor 王乐耘曾小勤朱高明
Owner SHANGHAI JIAO TONG UNIV