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Rare earth-containing high strength heat resisting magnesium alloy and preparation thereof

A high-strength, magnesium alloy technology, applied in the field of metal materials, to achieve excellent high-temperature strength and creep resistance, light weight, and simple process effects

Inactive Publication Date: 2009-06-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] Alloy composition (percentage by weight): 3% Y, 2% Gd, 0.3% Ca, 2% Nd, 0.1% Zr, impurity elements are less than 0.02%, and the rest is Mg.

[0026] The specific steps of the melting process of the alloy are as follows: (1) configure the alloy according to the above components, add pure magnesium into the resistance crucible furnace, and use SF 6 and CO 2 (2) Add Ca: After the magnesium ingot is completely melted, add industrial pure calcium at 660°C; (3) Add Y, Gd and Nd: Add Mg-Y, Mg-Gd and Mg-Nd master alloys; (4) Adding Zr: Raise the temperature of the magnesium liquid to 780°C, then add the Mg-Zr master alloy, and stir for 5 minutes to promote its full melting; (5) Casting: raise the temperature of the magnesium liquid to 800°C, keep warm for 30 minutes, then cool down to 760°C, energize and refine for 10 minutes, and control the standing time after refining to 40 minutes. After the magnesium liquid is cooled to 740°C, skim off the surface scum and cast. The steel ...

Embodiment 2

[0031] Alloy composition (percentage by weight): 3% Y, 10% Gd, 1.3% Ca, 5% Nd, 0.5% Zr, impurity elements are less than 0.02%, and the rest is Mg.

[0032] The specific steps of the melting process of the alloy are as follows: (1) configure the alloy according to the above components, add pure magnesium into the resistance crucible furnace, and use SF 6 and CO 2 (2) Add Ca: After the magnesium ingot is completely melted, add industrial pure calcium at 660°C; (3) Add Y, Gd and Nd: Add Mg-Y, Mg-Gd and Mg-Nd master alloys; (4) Adding Zr: Raise the temperature of the magnesium liquid to 780°C, then add the Mg-Zr master alloy, and stir for 5 minutes to promote its full melting; (5) Casting: raise the temperature of the magnesium liquid to 800°C, keep warm for 30 minutes, then cool down to 760°C, energize and refine for 10 minutes, and control the standing time after refining to 40 minutes. After the magnesium liquid is cooled to 740°C, skim off the surface scum and cast. The steel...

Embodiment 3

[0037] Alloy composition (percentage by weight): 4% Y, 4% Gd, 0.5% Ca, 0.5% Nd, 1.5% Zr, impurity elements are less than 0.02%, and the rest is Mg.

[0038] The specific steps of the melting process of the alloy are as follows: (1) configure the alloy according to the above components, add pure magnesium into the resistance crucible furnace, and use SF 6 and CO 2 (2) Add Ca: After the magnesium ingot is completely melted, add industrial pure calcium at 660°C; (3) Add Y, Gd and Nd: Add Mg-Y, Mg-Gd and Mg-Nd master alloys; (4) Adding Zr: Raise the temperature of the magnesium liquid to 780°C, then add the Mg-Zr master alloy, and stir for 5 minutes to promote its full melting; (5) Casting: raise the temperature of the magnesium liquid to 800°C, keep warm for 30 minutes, then cool down to 760°C, energize and refine for 10 minutes, and control the standing time after refining to 40 minutes. After the magnesium liquid is cooled to 740°C, skim off the surface scum and cast. The stee...

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Abstract

The invention relates to a high strength heat-resistant magnesium alloy containing rare earths of the technical field of metallic materials and a preparation method thereof. The magnesium alloy comprises the following components according to the mass percent: Y with more than or equal to 3% and less than or equal to 16%, Gd with more than or equal to 0% and less than or equal to 10%, Ca with more than or equal to 0.3% and less than or equal to 5%, Zr with more than or equal to 0.1% and less than or equal to 1.5%, and one or a plurality of Nd, Si, Sb, Ti, Sn, Sr, Bi, Cd, Nd with more than or equal to 0% and less than or equal to 5%, Si with more than or equal to 0% and less than or equal to 5%, Sb with more than or equal to 0% and less than or equal to 5%, Ti with more than or equal to 0% and less than or equal to 5%, Sn with more than or equal to 0% and less than or equal to 5%, Sr with more than or equal to 0% and less than or equal to 5%, Bi with more than or equal to 0% and less than or equal to 5%, Cd with with more than or equal to 0% and less than or equal to 5%, and the rest is Mg and impurities. The magnesium alloy is obtained by using melting and the subsequent heat treatment. The magnesium alloy not only can serve as casting magnesium alloy but also can serve as the deformation magnesium alloy and has better predominant mechanical property compared with the WE series commercial magnesium alloy.

Description

technical field [0001] The invention relates to a magnesium alloy in the technical field of metal materials and a preparation method thereof, in particular to a rare earth-containing high-strength heat-resistant magnesium alloy and a preparation method thereof. Background technique [0002] As the lightest metal structure material, magnesium alloy can meet the increasingly stringent requirements of automobile exhaust emission, and can produce new automobiles with light weight, low fuel consumption and environmental protection, so it has received extensive attention in the automobile industry. However, mechanical properties such as low high temperature strength restrict its application in engine and power system parts. Therefore, high-strength heat-resistant magnesium alloys have been proposed. [0003] Rare earth elements are considered to be important elements used to improve the heat resistance of magnesium alloys, such as Mg-Y-Nd-based alloys WE54 and WE43 that have been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
Inventor 王渠东高岩
Owner SHANGHAI JIAO TONG UNIV
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