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A low-cost, high-strength, fatigue-resistant, flame-resistant and deformable magnesium alloy and its preparation method

A deformed magnesium alloy, high-strength technology, applied in the field of metal materials and its processing, can solve the problems of high alloy cost, low cost, high price, etc.

Active Publication Date: 2018-01-30
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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  • A low-cost, high-strength, fatigue-resistant, flame-resistant and deformable magnesium alloy and its preparation method
  • A low-cost, high-strength, fatigue-resistant, flame-resistant and deformable magnesium alloy and its preparation method
  • A low-cost, high-strength, fatigue-resistant, flame-resistant and deformable magnesium alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0065] (1) 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: 20 wt% La, the balance is Mg) the master alloy is used as the raw material, and the ingredients are prepared 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 intermediate alloy into the crucible of the melting furnace. 2 and SF 6 Heating under the protection of mixed protective gas, the heating rate is 20~30℃ / min, CO 2 and SF 6 The flow ratio of the solutio...

Embodiment 2

[0072] A kind of low-cost high-strength anti-fatigue and flame-retardant magnesium alloy designed according to the present invention consists of Mg-5.9Al-4.0Ca-0.2Mn-0.1Nd-0.05Pr-0.1Ce-0.05La (wt%), and the rest Mg and trace unavoidable impurities;

[0073] (1) Use pure Mg ingots, pure Al ingots, pure Ca particles, and master alloys such as Mg-1.3Mn, Mg-20Nd, Mg-20Pr, Mg-20Ce, and Mg-20La as raw materials, according to the weight percentage of the above-mentioned magnesium alloy components Ingredients;

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

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

Embodiment 3

[0080] A low-cost, high-strength, anti-fatigue, flame-resistant, and deformable magnesium alloy designed according to the present invention has a composition of Mg-4.0Al-3.0Ca-0.5Mn-0.3Pr-0.2Ce (wt%), and the rest are Mg and traces that are unavoidable impurities;

[0081] (1) Using pure Mg ingots, pure Al ingots, and Mg-10Ca, Mg-1.3Mn, Mg-20Pr, and Mg-20Ce master alloys as raw materials, the ingredients are prepared 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 intermediate alloy into the crucible of the melting furnace. 2 and SF 6 Heating under the protection of mixed protective gas, the heating rate is 20~30℃ / min, CO 2 and SF 6 The flow ratio of the solution is 50, and the temperature of the solution after complete melting is controlled at 710-760°C;

[0083] (3) Put the pure Al ingot and the Mg-RE master alloy in the preheating...

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Abstract

The invention discloses a low-cost, high-strength, fatigue-resistant, flame-resistant and deformable magnesium alloy and a preparation method thereof. The chemical composition of the magnesium alloy includes: Al 2.0-6.0%, Ca 1.5-4.0%, Mn 0.2-0.8%, rare earth RE 0.1-0.8%, wherein the rare earth RE is La, Pr, One or more of Ce and Nd, and the content of the cheap rare earth is not zero at the same time, and the rest is Mg and trace unavoidable impurities. The magnesium alloy provided by the invention will meet the urgent needs of users for high-performance materials, expand the use of magnesium alloys in aerospace, automobiles and rail trains and other load-bearing structural parts, structural parts of medical care, welfare and outdoor sports equipment, and have a certain heat resistance. Applications on magnesium alloy products such as components (such as compressor scrolls) that require fatigue performance.

Description

technical field [0001] The invention relates to metal materials and processing technology thereof, in particular to a low-cost, high-strength, anti-fatigue, flame-resistant and deformable magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium is the lightest of the commonly used metal structural materials, with a specific gravity of about 1.7 g / 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 are lightweight structural materials and functional materials with high specific strength. They are recognized by the world as "the most promising new materials in the 21st century" ". However, due to the insufficient strength of magnesium alloys (especially yield strength and fatigue strength) and low ignition point, its application range is limited. Therefore, improving the yield strength, fatigue strength and ignition temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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