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Low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and preparation method thereof

A wrought magnesium alloy, high-strength technology, applied in the field of metal materials and its processing, can solve the problems of not being widely used, low cost, high price, etc.

Active Publication Date: 2016-07-20
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it adds more rare earth and precious metal elements (1.7-2.95%) such as Gd, Sr, and Dy, which is expensive and the cost of the alloy is high, so it cannot be widely used; and it does not involve the optimization of fatigue performance and flame resistance of magnesium alloys.
[0010] In summary, among the existing magnesium alloys, there is no alloy that can achieve low cost and good plastic deformation processing ability (such as rolling, extrusion or forging process, with good processing ability). efficiency), good heat resistance and high mechanical properties (including yield strength (greater than 360MPa) and fatigue strength (greater than 150MPa at room temperature))

Method used

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  • Low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and preparation method thereof
  • Low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and preparation method thereof
  • Low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The composition of a low-cost, high-strength, fatigue-resistant and flame-retardant deformed magnesium alloy designed according to the present invention is Mg-2.0Al-2.0Ca-0.3Mn-0.1La (wt%), and the rest is Mg and trace inevitable impurities;

[0065] (1) Using pure Mg ingots, pure Al ingots, pure Ca particles, and Mg-1.3Mn (that is, the composition content of the master alloy is: 1.3wt% Mn, the balance is Mg) and Mg-20La (that is, the composition of the master alloy The content is: 20wt% La, the balance is Mg) The master alloy is used as the raw material, and the ingredients are mixed according to the weight percentage of the above-mentioned magnesium alloy composition;

[0066] (2) After cleaning and preheating the crucible, put all the pure magnesium ingots and Mg-1.3Mn master alloy into the crucible of the melting furnace. 2 And SF 6 Under the protection of mixed protective gas, the heating rate is 20~30℃ / min, CO 2 And SF 6 The flow rate ratio is 50, and the temperature of...

Embodiment 2

[0072] The composition of a low-cost, high-strength, fatigue-resistant and flame-retardant deformed magnesium alloy designed according to the present invention is Mg-5.9Al-4.0Ca-0.2Mn-0.1Nd-0.05Pr-0.1Ce-0.05La (wt%), and the rest It is Mg and trace inevitable impurities;

[0073] (1) Using pure Mg ingots, pure Al ingots, pure Ca particles and intermediate alloys such as Mg-1.3Mn, Mg-20Nd, Mg-20PrMg-20Ce, Mg-20La, etc. as raw materials, the ingredients are mixed according to the weight percentage of the above-mentioned magnesium alloy components ;

[0074] (2) After cleaning and preheating the crucible, put all the pure magnesium ingots and Mg-1.3Mn master alloy into the crucible of the melting furnace, in the CO 2 And SF 6 Under the protection of mixed protective gas, the heating rate is 20~30℃ / min, CO 2 And SF 6 The flow rate ratio is 50, and the temperature of the solution after complete melting is controlled at 710~760℃;

[0075] (3) Put pure Al ingot and Mg-RE master alloy ...

Embodiment 3

[0080] The composition of a low-cost, high-strength, fatigue-resistant and flame-retardant deformed magnesium alloy designed according to the present invention is Mg-4.0Al-3.0Ca-0.5Mn-0.3Pr-0.2Ce (wt%), and the rest is Mg and trace amounts of unavoidable 的impurities;

[0081] (1) Take pure Mg ingots, pure Al ingots and Mg-10Ca, Mg-1.3Mn, Mg-20Pr, Mg-20Ce master alloys as raw materials, and batch them according to the weight percentage of the above-mentioned magnesium alloy components;

[0082] (2) After cleaning and preheating the crucible, put all the pure magnesium ingots and Mg-1.3Mn master alloy into the crucible of the melting furnace, in the CO 2 And SF 6 Under the protection of mixed protective gas, the heating rate is 20~30℃ / min, CO 2 And SF 6 The flow rate ratio is 50, and the temperature of the solution after complete melting is controlled at 710~760℃;

[0083] (3) Put pure Al ingot and Mg-RE master alloy in a preheating furnace and heat to 260~280℃. After the pure Mg ...

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Abstract

The present invention discloses a low-cost high-strength anti-fatigue nonflammable wrought magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following chemical components in percentage by mass: 2.0-6.0% of Al, 1.5-4.0% of Ca, 0.2-0.8% of Mn, 0.1-0.8% of rare earth (RE), and the balance Mg and trace inevitable impurities, wherein the RE is one or more of cheap rare earth elements of La, Pr, Ce and Nd, and the content of the cheap rare earth is not zero simultaneously. The magnesium alloy provided by the present invention will meet the urgent need of users for high-performance materials, and the application of the magnesium alloy to magnesium alloy products, for example, load-bearing structural parts of aerospace, vehicles, rail trains and so on, structural parts of medical treatment, welfare and outdoor sport equipment, and parts (e.g., compressor scroll pans) having certain requirements for heat resistance and fatigue performance, is expanded.

Description

Technical field [0001] The invention relates to a metal material and its processing technology, in particular to a low-cost, high-strength, fatigue-resistant and flame-retardant deformed magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium is the lightest kind of commonly used metal structural materials, with a specific gravity of about 1.7g / cm 3 , Is 1 / 4 of steel and 2 / 3 of aluminum. Magnesium and magnesium alloys have the three advantages of rich resources, energy saving, and environmental friendliness, and they are lightweight structural materials and functional materials with high specific strength. They are recognized by the world as "the most promising new material in the 21st century." ". However, the strength of magnesium alloy is not high enough (especially the yield strength and fatigue strength), and the ignition point is low, which limits its application range. Therefore, improving the yield strength, fatigue strength and ignitio...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/02C22F1/06
Inventor 徐世伟唐伟能秦云蒋浩民张丕军
Owner BAOSHAN IRON & STEEL CO LTD
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