Deforming magnesium alloy and preparation method thereof

A technology for deforming magnesium alloys and magnesium melts, applied in the field of metal materials, can solve problems such as insufficient heat resistance, mechanical properties need to be improved, and strength drops more, so as to promote the formation of precipitates and hinder basal plane dislocations. Slip, improve the effect of mechanical properties

Active Publication Date: 2012-12-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Among them, WE54 is a typical rare earth magnesium alloy containing neodymium, and its composition is Mg-5.1%Y-3.2%RE(1.5%~2%Nd)-0.5%Zr, which is currently a commercially available magnesium alloy. Alloy, the heat resistance temperature can reach 300 ℃, and after heat treatment, the corrosion resistance is also better than other high temperature magnesium alloys, but the heat resistance is not stable enough, the strength drops more at high temperature, and its mechanical properties need to be improved

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  • Deforming magnesium alloy and preparation method thereof
  • Deforming magnesium alloy and preparation method thereof
  • Deforming magnesium alloy and preparation method thereof

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[0027] The present invention also provides a method for preparing a deformed magnesium alloy, which includes the following steps: A) melting and alloying magnesium ingots, zinc ingots, gadolinium sources, neodymium sources, yttrium sources and zirconium sources, and obtaining a magnesium melt after refining, The magnesium melt includes 0.1wt%~10wt% of neodymium, 10wt%~12wt% of gadolinium, 3wt%~5wt% of yttrium, 0.5wt%~2wt% of zinc, 0.3wt%~0.8wt% of zirconium, The remaining magnesium and unavoidable impurities, the content of which is less than 0.02%; B) casting the magnesium melt and extruding it to obtain a deformed magnesium alloy.

[0028] In order to clearly illustrate the present invention, the experimental processes of step A and step B are described in detail below respectively.

[0029] According to the step A of the present invention, it is as follows: under a protective atmosphere, add magnesium ingots, zinc ingots and covering agent to the melting furnace, raise the ...

Embodiment 1

[0049] 1.1 Divide pure Mg ingots, pure Zn ingots, 20%Mg-Gd master alloys, 20%Mg-Y master alloys, 20%Mg-Nd master alloys and 30%Mg-Zr master alloys, remove scale and oil And drying, according to the element content Gd 10wt%, Y 4wt%, Zn 1wt%, Nd 0.5wt%, Zr 0.4wt%, the balance is the proportioning of Mg. Preparation of covering agent: 40wt% MgCl 2 , 20wt% KCl, 20wt% CaF and 20wt% BaCl 2 Mix to obtain covering agent; prepare refining agent: the KCl of 54wt%, the BaCl of 18wt% 2 , 24wt% Cacl 2 with 4wt% MgCO 3 Mix to get a refining agent.

[0050] 1.2 Under the protection of 99% carbon dioxide and 1% sulfur hexafluoride mixed gas, add the covering agent prepared in 1.1 with 2wt% alloy raw materials, the pure Mg ingot and pure Zn ingot weighed in 1.1 into the melting furnace, Raise the temperature to 750°C, add the Mg-Gd master alloy and Mg-Nd master alloy weighed in 1.1, stir for 2 minutes, raise the temperature to 780°C, add the Mg-Y master alloy and Mg-Zr master alloy, stir ...

Embodiment 2

[0055] 2.1 Divide pure Mg ingots, pure Zn ingots, 20%Mg-Gd master alloys, 20%Mg-Y master alloys, 20%Mg-Nd master alloys and 30%Mg-Zr master alloys, remove scale and oil And drying, according to the element content Gd 11wt%, Y 5wt%, Zn 1.5wt%, Nd 1wt%, Zr 0.8wt%, the balance is the ratio of Mg. Preparation of covering agent: 40wt% MgCl 2 , 20wt% KCl, 20wt% CaF and 20wt% BaCl 2 Mix to obtain covering agent; prepare refining agent: the KCl of 54wt%, the BaCl of 18wt% 2 , 24wt% Cacl 2 with 4wt% MgCO 3 Mix to get a refining agent.

[0056] 2.2 Under the protection of a mixed gas of 99% carbon dioxide and 1% sulfur hexafluoride, add the covering agent prepared in 2.1 with 2wt% alloy raw materials, the pure Mg ingot and pure Zn ingot weighed in 2.1 into the melting furnace, Raise the temperature to 730°C, add the Mg-Gd master alloy and Mg-Nd master alloy weighed in 2.1, stir for 2 minutes, raise the temperature to 780°C, add the Mg-Y master alloy and Mg-Zr master alloy, stir for...

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Abstract

The invention provides a deforming magnesium alloy and a preparation method thereof. The deforming magnesium alloy comprises the following components in percentage by mass: 0.1-10% of neodymium, 10-12% of gadolinium, 3-5% of yttrium, 0.5-2% of zinc, 0.3-0.8% of zirconium, and the balance of magnesium and inevitable impurities. Compared with WE54 in the prior art, the invention is characterized in that rare-earth elements neodymium, gadolinium and yttrium are added into the Mg-Zn-Zr magnesium alloy. Firstly, after adding zinc, abundant strip Mg12YZn precipitated phases are formed at the alloy grain boundary to prevent grain boundary migration at high temperature and enhance the high-temperature stability of the alloy, and the precipitated phases are uniformly arranged in the extrusion direction to prevent basal dislocation migration and enhance the mechanical properties of the alloy; and secondly, the three rare-earth elements gadolinium, yttrium and neodymium are added, so the interactions among the rare-earth elements can be utilized to lower the solid solubility of the gadolinium, yttrium and neodymium in the magnesium base, thereby promoting the formation of the precipitated phases and enhancing the mechanical properties of the alloy.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a deformed magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy is the lightest structural metal material with a density of 1.75~1.90g / cm 3 , only 2 / 3 of aluminum alloy, 1 / 4 of steel. Compared with other metal structural materials, magnesium alloy has a series of advantages such as high specific strength, specific stiffness, shock absorption, electromagnetic shielding and radiation resistance, easy cutting, easy recycling, etc. It is widely used in automobiles, electronic appliances, communications, The aerospace and national defense military industry has extremely important application value and broad application prospects. It is the third type of metal structural material developed after steel and aluminum alloy. According to different processing methods, magnesium alloy materials are mainly divided into two categ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/02C22F1/06
Inventor 孟健于子健邱鑫孙伟张德平张洪杰
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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