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High performance creep resistant magnesium alloys

An alloy and lightweight alloy technology, applied in the field of creep-resistant magnesium-based alloys, can solve problems such as high cost

Active Publication Date: 2016-09-07
DEAD SEA MAGNESIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Said alloys are not suitable for HPDC machining and are costly

Method used

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Embodiment Construction

[0050] The alloys of the present invention were prepared in 150 1 crucibles made of mild steel. CO 2 A mixture of +0.5% HFC134a was used as a protective atmosphere. The raw materials used are as follows:

[0051] Magnesium (Mg) - Pure magnesium, grade 9980A, containing at least 99.8% magnesium.

[0052] Neodymium (Nd) - Commercially available pure Nd (less than 0.5% impurity).

[0053] Zirconium (Zr) - Zr95 tablet containing at least 95% Zr.

[0054] Yttrium (Y) - Commercially available pure Y (less than 1% impurity).

[0055] Calcium (Ca) - Pure Ca (less than 0.1% impurity).

[0056] Unlike the alloying process described in CN1752251 which uses intermediate Mg-Nd, Mg-Ca and Mg-Zr master alloys, the alloy of the present invention is prepared with pure Nd and pure Ca, which significantly simplifies the process and reduces the duration of the process And significantly reduce the cost of the alloy. The neodymium and zirconium are added with vigorous stirring of the melt, u...

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Abstract

A magnesium based alloy consisting of, by weight: at least 94.8% magnesium, 2.5-4.6% neodymium, 0.05-0.40% yttrium, and 0.03-0.65% zirconium and incidental impurities. Optionally, the alloy further contains up to 0.02wt% calcium. The alloy is suitable for high pressure die casting (HPDC) as well as for sand casting, investment casting, permanent mold casting, twin roll casting and direct chill casting. The disclosed alloy exhibits good castability, high strength, high corrosion resistance and high creep resistance at room temperature, as well as in high temperatures.

Description

field of invention [0001] The present invention relates to creep-resistant magnesium-based alloys for applications having good castability at elevated temperatures, particularly for high-pressure die casting, but beneficially also for applications including sand casting, investment casting Casting), metal casting (permanent mold casting) and direct chill casting (directchill casting) or twin-roll casting (twin-roll casting) process. Background technique [0002] The magnesium industry is experiencing rapid growth, due in part to the needs of the transportation industry to improve fuel economy and emissions. Additionally, significant progress in weight reduction has been made in consumer applications of magnesium alloys, such as power hand tools, lawn and garden equipment, electronic and optical equipment, and the like. To significantly expand the above applications, new advanced alloys are required. [0003] High pressure die casting (HPDC) is the predominant form of casti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06
CPCB22D21/007C22C23/06C22F1/06
Inventor B·布朗芬N·纳加V·科托洛夫斯基N·莫斯科维奇
Owner DEAD SEA MAGNESIUM
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