High-zinc deformation magnesium alloy and preparation and processing method thereof

A technology of wrought magnesium alloys and magnesium alloys, which is applied in the field of high-zinc wrought magnesium alloys and their preparation, and industrial wrought magnesium alloys, which can solve the problems of brittle fracture of alloys, decreased grain boundary mobility, and limited impact resistance of rare earth magnesium alloys. And other issues

Active Publication Date: 2015-06-24
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the important defect of rare earth-containing magnesium alloys is that their plasticity is relatively poor. This is mainly because the stability of the rare earth phase makes it difficult for dislocations to move, the mobility

Method used

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  • High-zinc deformation magnesium alloy and preparation and processing method thereof
  • High-zinc deformation magnesium alloy and preparation and processing method thereof
  • High-zinc deformation magnesium alloy and preparation and processing method thereof

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preparation example Construction

[0057] The preparation method of the high-zinc deformed magnesium alloy Mg-(8-12)Zn-(0.5-1.5)Ca-(0.5-1.0)MM of the present invention comprises:

[0058] 1 alloy melting

[0059] The materials are prepared according to the weight percentage of the magnesium alloy components described in the present invention, and each element is added in the form of pure metal. Raise the temperature of the preheating furnace to 300°C-400°C, and raise the temperature of the melting furnace to 600°C-850°C (the preheating furnace is a resistance furnace, and the melting furnace is a temperature-controllable medium-frequency electromagnetic induction heating furnace), and simultaneously A protective gas (a mixed gas of argon and 134a, the volume ratio of which is about 20:1, the same below) is introduced into the furnace;

[0060] In the preheating furnace, the pure magnesium ingot is preheated for more than 5 minutes (generally 10min to 20min), to ensure that there is no water vapor on the surfac...

Embodiment 1

[0073] According to the content of the invention, the alloy Mg-8.7Zn-1.2Ca-0.5MM (wt%, all hereinafter are mass percentages) is prepared, wherein MM represents Ce-rich mixed rare earth (its mass content is 48 parts of Ce, 30 parts of La, 18 parts of Nd , 3 parts of Pr, the content of impurities in MM is about 1%, mainly Fe, Mn), and the content of other impurities in alloy ingots does not exceed 0.1%. The recovery rate of each element is calculated according to 100%.

[0074] 1 alloy melting

[0075] The materials are prepared according to the weight percentage of the magnesium alloy composition of the present invention, wherein Mg89.6kg, Zn8.7kg, Ca1.2kg, MM0.5kg, each element is added in the form of pure metal. Raise the temperature of the preheating furnace to 300°C, and raise the temperature of the melting furnace to 700°C (the preheating furnace is a resistance furnace, and the melting furnace is a temperature-controllable medium-frequency electromagnetic induction heati...

Embodiment 2

[0087] According to the content of the invention, the alloy Mg-10.4Zn-1.5Ca-1.0MM (wt%, all hereinafter are mass percentages) is prepared, wherein MM represents Ce-rich mixed rare earth (its mass content is 48 parts of Ce, 30 parts of La, 18 parts of Nd , 3 parts of Pr, the content of impurities in MM is about 1%, mainly Fe, Mn), and the content of other impurities in alloy ingots does not exceed 0.1%. The recovery rate of each element is calculated according to 100%.

[0088] 1 alloy melting

[0089] The materials are prepared according to the weight percent of the magnesium alloy components of the present invention, wherein Mg87.1kg, Zn10.4kg, Ca1.5kg, MM1.0kg, each element is added in the form of pure metal. Raise the temperature of the preheating furnace to 350°C, and raise the temperature of the melting furnace to 750°C (the preheating furnace is a resistance furnace, and the melting furnace is a temperature-controllable intermediate frequency electromagnetic induction h...

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Abstract

The invention relates to a high-zinc deformation magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by mass: 8-12% of Zn, 0.5-1.5% of Ca, 0.5-1.0% of MM and the balance of Mg, wherein MM represents Ce-rich mixed rare earth and comprises the following components in parts by mass: 48 parts of Ce, 30 parts of La, 18 parts of Nd, 3 parts of Pr and about 1% of impurities which are Fe and Mn mainly. The preparation method of the magnesium alloy comprises the steps of smelting of the alloy, semi-solid extraction, homogenization treatment, re-deformation and aging deformation heat treatment. The Mg-Zn-Ca-MM alloy provided by the invention has better room-temperature mechanical property, and the mechanical property of the alloy after solid solution and aging can achieve 400-460MPa; meanwhile, the elongation rate of the alloy can achieve 7%-10%; and in addition, the alloy has certain high temperature resistance, and the breaking strength can be above 200MPa when breaking at 200 DEG C.

Description

technical field [0001] The invention relates to a high-zinc deformed magnesium alloy and a preparation method thereof, belonging to the category of industrial deformed magnesium alloys. Background technique [0002] Magnesium alloy is an important candidate material for aerospace research and production in the 21st century due to its low density and easy recycling. At present, the relatively mature magnesium alloy systems mainly include AZ, AM and ZK alloys. Better formability and lower cost are the original intention of developing the above alloy systems, which have been recognized by the market. However, the above-mentioned alloys also have obvious problems, that is, their poor heat resistance, which greatly limits their ability to serve under high temperature conditions. Relatively speaking, pure rare earth alloys have better heat resistance and are mainly used in the military industry, but their cost is high, and the possibility of wide application is small. [0003] C...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22F1/06
CPCC22C23/04C22F1/06
Inventor 马鸣龙张奎李兴刚李永军石国梁袁家伟赖林
Owner GRIMAT ENG INST CO LTD
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