High-strength heat-resisting wrought magnesium alloy and preparation method thereof

A heat-resistant deformation, magnesium alloy technology, applied in the field of non-ferrous metal materials and its processing, can solve the problems of poor high temperature mechanical properties of magnesium alloys, achieve good thermal stability, improve strength and heat resistance, and improve high temperature stability. Effect

Inactive Publication Date: 2019-04-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention aims to solve the technical problem of relatively poor high-temperature mechanical properties of magnesium alloys in the prior art, improve the thermal properties, mechanical properties and stability of rare earth magnesium alloys, and provide a high-strength heat-resistant deformation magnesium alloy and its preparation method

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  • High-strength heat-resisting wrought magnesium alloy and preparation method thereof
  • High-strength heat-resisting wrought magnesium alloy and preparation method thereof
  • High-strength heat-resisting wrought magnesium alloy and preparation method thereof

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preparation example Construction

[0047] The preparation method of the high-strength heat-resistant deformation magnesium alloy of the present invention, the steps are as follows:

[0048] Step 1, melting magnesium source, zinc source, gadolinium source, ytterbium source and zirconium source to obtain alloy liquid;

[0049] Step 2, cooling the alloy liquid and pouring it into a mold to obtain a casting;

[0050] Step 3, extruding the casting to obtain a high-strength heat-resistant deformable magnesium alloy.

[0051] In the present invention, the types and sources of magnesium sources, zinc sources, gadolinium sources, ytterbium sources and zirconium sources are not particularly limited, and magnesium sources, zinc sources, gadolinium sources, ytterbium sources and zirconium sources well known to those skilled in the art can be used. Usually, the source of magnesium is magnesium ingots, preferably pure magnesium ingots containing more than 99.9 wt% of magnesium; the source of zinc is zinc ingots, preferably ...

Embodiment 1

[0082] The high-strength heat-resistant deformation magnesium alloy has the following components: Gd 8.0wt%, Yb 1.0wt%, Zn 1.0wt%, Zr 0.5wt%, and the balance is Mg and unavoidable impurity elements.

[0083] The preparation of the above-mentioned high-strength heat-resistant deformation magnesium alloy:

[0084] Step 1, magnesium ingot, zinc ingot, gadolinium source (magnesium-gadolinium master alloy ingot containing 20% ​​gadolinium), ytterbium source (magnesium-ytterbium master alloy ingot containing 20% ​​ytterbium) and zirconium source (magnesium-zirconium master alloy ingot containing 30% zirconium) Intermediate alloy ingot) to remove the oxide layer, prepare materials according to the ratio, and then preheat to 250 ° C.

[0085] Step 2. When the crucible is heated to 550°C, add magnesium ingots under the condition of feeding protective gas. After the magnesium ingots are melted, raise the temperature to 730°C, add zinc ingots, gadolinium sources and ytterbium sources, an...

Embodiment 2

[0093] High-strength heat-resistant deformation magnesium alloy, the composition is: Gd 8.5wt%, Yb 2wt%, Zn 1.2wt%, Zr 0.5wt%, the balance is Mg and unavoidable impurity elements.

[0094] Preparation of high-strength heat-resistant deformation magnesium alloy:

[0095] Step 1, magnesium ingot, zinc ingot, gadolinium source (magnesium-gadolinium master alloy ingot containing 20% ​​gadolinium), ytterbium source (magnesium-ytterbium master alloy ingot containing 20% ​​ytterbium) and zirconium source (magnesium-zirconium master alloy ingot containing 30% zirconium) Intermediate alloy ingot) to remove the oxide layer, prepare materials according to the ratio, and then preheat to 250 ° C.

[0096] Step 2. When the crucible is heated to 550°C, add magnesium ingots under the condition of feeding protective gas, wait for the magnesium ingots to melt, raise the temperature to 720°C, add zinc ingots, gadolinium sources and ytterbium sources, and after they melt, skim Remove scum on the...

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Abstract

The invention relates to a high-strength heat-resisting wrought magnesium alloy and a preparation method thereof, and belongs to the technical field of nonferrous materials and processing thereof. Thetechnical problem that the high-temperature mechanical property of magnesium alloys in the prior art is poor is solved, and the heat property, the mechanical property and stability of the rare-earthmagnesium alloy are improved. The magnesium alloy comprises 7.0-9.0wt% of Gd, Yb being larger than 0 and smaller than or equal to 4wt%, 1.0-1.5wt% of Zn, 0.4-0.6wt% of Zr and the balance Mg and inevitable impurity elements. The magnesium alloy has high strength and the excellent heat resistance; and through detecting, the property can achieve the conditions that the yield strength under room temperature is larger than 380 MPa and the yield strength under the temperature being 250 DEG C can keep being about 300 MPa. The high-strength heat-resisting wrought magnesium alloy is expected to be usedon force bearing structure components with the service temperature higher than 250 DEG C.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal materials and processing thereof, and in particular relates to a high-strength heat-resistant deformation magnesium alloy and a preparation method thereof. Background technique [0002] As the lightest structural material at present, magnesium alloy has a density of about 1.74-1.90g / cm 3 , only 1 / 4 of steel, 2 / 3 of aluminum alloy. Compared with other metal materials, magnesium alloy has high specific strength, specific stiffness, good machinability, electromagnetic protection characteristics, damping performance and thermal conductivity, and is easy to recycle. It is favored in many aspects such as lightweight, energy saving, and environmental protection. [0003] According to different processing methods, magnesium alloys are divided into cast magnesium alloys and wrought magnesium alloys. Cast magnesium alloys usually contain many casting defects, such as inclusions, shrinkage caviti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22C1/02C22C1/06C22F1/06
Inventor 孟健李柏顺张栋栋管凯杨强孙伟邱鑫田政牛晓东
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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