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Rare earth magnesium alloy and preparation method of same

A rare earth-magnesium, magnesium-neodymium master alloy technology, applied in the field of magnesium alloy materials, can solve the problems of difficulty in production, processing and handling, poor flame retardancy, and limited wide use, etc., and achieves improved ignition point, improved mechanical properties, and improved magnesium alloy properties Effect

Active Publication Date: 2017-08-29
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of magnesium alloys is restricted by the following factors: First, the strength and toughness of magnesium alloys are not ideal, which limits their wide use
The second is that magnesium alloys are very flammable. Because magnesium is relatively active, magnesium alloys are prone to oxidative combustion during smelting and processing. Generally, magnesium alloys are smelted in flame-retardant solvents or protective atmospheres. This characteristic of being easy to oxidize and burn has brought great difficulties to the production, processing and handling of alloys, which has greatly hindered the wide application of magnesium alloys. Obtaining ideal flame-retardant and tough magnesium alloys has always been an important issue in the field of magnesium alloy research. topic
[0003] The invention patent with application publication number CN103146973A discloses a high-temperature-resistant rare earth magnesium alloy. The magnesium alloy has high tensile strength by adding rare earth elements, but its flame retardancy is poor, and there are still many in practical applications. defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The rare earth magnesium alloy in this embodiment is composed of the following components by mass percentage: 2.0% Sm, 1.2% Nd, 1.3% Al, 1.4% Sr, 1.1% Sb, the balance is Mg and unavoidable impurities, impurity elements It is Fe, Cu and Ni, and the sum of the mass percentages of Fe, Cu and Ni is less than 0.2%.

[0027] The preparation method of above-mentioned rare earth magnesium alloy in the present embodiment is as follows:

[0028] (1) Preheating the pure magnesium, pure aluminum, pure strontium, pure antimony, magnesium samarium master alloy, and magnesium neodymium master alloy to 150° C. respectively;

[0029] (2) Add the preheated magnesium, aluminum, strontium and antimony in the corundum crucible in step (1), and 2 with SF 6 Melted in a medium frequency induction furnace in a mixed gas atmosphere, where CO 2 with SF 6 The volume ratio is 99:1, at 680°C, add the preheated magnesium samarium master alloy and magnesium neodymium master alloy in step (1), keep...

Embodiment 2

[0033] The rare earth magnesium alloy in this embodiment is composed of the following components by mass percentage: 2.2% Sm, 1.3% Nd, 1.0% Al, 1.5% Sr, 1.0% Sb, the balance is Mg and unavoidable impurities, impurity elements It is Fe, Cu and Ni, and the sum of the mass percentages of Fe, Cu and Ni is less than 0.2%.

[0034] The preparation method of above-mentioned rare earth magnesium alloy in the present embodiment is as follows:

[0035] (1) Preheat magnesium, aluminum, strontium, antimony, magnesium samarium master alloy and magnesium neodymium master alloy separately to 170°C;

[0036] (2) Add the preheated magnesium, aluminum, strontium and antimony in the corundum crucible in step (1), and 2 with SF 6 Melted in a medium frequency induction furnace in a mixed gas atmosphere, where CO 2 with SF 6 The volume ratio is 99:1, at 690°C, add the magnesium samarium master alloy and magnesium neodymium master alloy preheated in step (1), keep it warm for 10min, remove the s...

Embodiment 3

[0040] The rare earth magnesium alloy in this embodiment is composed of the following components by mass percentage: 2.5% Sm, 1.3% Nd, 1.0% Al, 1.3% Sr, 1.2% Sb, the balance is Mg and unavoidable impurities, impurity elements It is Fe, Cu and Ni, and the sum of the mass percentages of Fe, Cu and Ni is less than 0.2%.

[0041] The preparation method of above-mentioned rare earth magnesium alloy in the present embodiment is as follows:

[0042] (1) Preheat magnesium, aluminum, strontium, antimony, magnesium samarium master alloy and magnesium neodymium master alloy separately to 180°C;

[0043] (2) Add the preheated magnesium, aluminum, strontium and antimony in the corundum crucible in step (1), and 2 with SF 6 Melted in a medium frequency induction furnace in a mixed gas atmosphere, where CO 2 with SF 6 The volume ratio is 99:1, at 690°C, add the preheated magnesium samarium master alloy and magnesium neodymium master alloy in step (1), keep warm for 13min, remove surface ...

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Abstract

The invention relates to a rare earth magnesium alloy and a preparation method of same, and belongs to the technical field of magnesium alloy materials. The rare earth magnesium alloy is composed of, by mass, 2.0-2.5% of Sm, 1.0-1.3% of Nd, 1.0-1.5% of Al, 1.3-1.5% of Sr, 1.0-1.3% of Sb, and the balanced being Mg and unavoidable impurities. The rare earth magnesium alloy has good flame retarding performance and high tensile strength, and has wide industrial application prospect.

Description

technical field [0001] The invention relates to a rare earth magnesium alloy and a preparation method thereof, belonging to the technical field of magnesium alloy materials. Background technique [0002] In the existing metal structure material system, magnesium alloy has high specific strength and specific stiffness, excellent casting performance and high damping and anti-vibration performance, is easy to recycle, has environmental protection characteristics, and has a very wide application prospect. Aerospace, electronic communication, and automobile industries are favored, and it has become one of the most promising metal structural materials at present. However, the application of magnesium alloys is restricted by the following factors: First, the strength and toughness of magnesium alloys are not ideal, which limits their widespread use. The second is that magnesium alloys are very flammable. Because magnesium is relatively active, magnesium alloys are prone to oxidati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 陈君张清朱利敏付三玲陈晓亚李全安张帅王颂博关海昆
Owner HENAN UNIV OF SCI & TECH