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Y reinforced Mg-Zn-Y-Zr system magnesium alloy with effective utilization of rare earth element and production method

A rare earth element and magnesium alloy technology, applied in the field of effectively utilizing rare earth element Y to strengthen Mg-Zn-Y-Zr series magnesium alloy and its preparation, to achieve good plasticity, low density, and simple processing and operation

Active Publication Date: 2008-12-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of effectively utilizing rare earth element Y to strengthen Mg-Zn-Y-Zr series magnesium alloy and its preparation method, solve the problems such as magnesium alloy quasi-crystal phase strengthening

Method used

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  • Y reinforced Mg-Zn-Y-Zr system magnesium alloy with effective utilization of rare earth element and production method
  • Y reinforced Mg-Zn-Y-Zr system magnesium alloy with effective utilization of rare earth element and production method
  • Y reinforced Mg-Zn-Y-Zr system magnesium alloy with effective utilization of rare earth element and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] I), alloy composition

[0030] Prepare 40 kilograms of high Zn / Y ratio Mg-Zn-Y-Zr magnesium alloy materials according to the following proportions. -33% Zr) 1 kg and the balance magnesium (Mg). In terms of weight percentage, the composition of the alloy is Mg-6%Zn-1%Y-0.4%Zn, and the ratio of Zn / Y in the alloy is 6.

[0031] II), alloy smelting and casting

[0032] The alloy is smelted in an 80 kg capacity crucible and electric resistance furnace. The crucible and casting molds are made of mild steel. Taking Example 1 as an example, the smelting and casting process of the alloy will be described in detail below.

[0033] 1) Set the target temperature of the crucible to 680°C and start heating; then preheat various ingredients such as pure magnesium, pure zinc, pure yttrium, magnesium-zirconium master alloy (Mg-33%Zr) in an oven to 150°C, At the same time, put the covering agent / RJ-5 into the oven and bake; preheat the casting mold to 300° C. in another box furnace....

Embodiment 2

[0049] I), alloy composition

[0050] Configure 40 kilograms of high Zn / Y ratio Mg-Zn-Y-Zr magnesium alloy materials according to the following proportions. -33% Zr) 1 kg and the balance magnesium (Mg). In terms of weight percentage, the composition of the alloy is Mg-8%Zn-1%Y-0.4%Zn, and the ratio of Zn / Y in the alloy is 8.

[0051] II), alloy smelting and casting

[0052] The smelting and casting of reference embodiment 1. The difference is: the zinc (Zn) content of the two is different.

[0053] III), hot extrusion processing

[0054] Referring to the extrusion process of Example 1.

[0055] IV), microstructure characterization

[0056] Refer to the microstructure characterization of Example 1. The main phases in the alloy are α-Mg and Mg 3 Zn 6 Y (quasicrystalline phase I-phase); compared with the alloy in Example 1, the volume percentage of the quasicrystalline phase I-phase in this alloy is significantly increased. In this embodiment, the volume percentage of t...

Embodiment 3

[0060] I), alloy composition

[0061] Configure 40 kilograms of high Zn / Y ratio Mg-Zn-Y-Zr magnesium alloy materials according to the following proportions. -33% Zr) 1 kg and the balance magnesium (Mg). In terms of weight percentage, the composition of the alloy is Mg-10%Zn-1%Y-0.4%Zn, and the ratio of Zn / Y in the alloy is 10.

[0062] II), alloy smelting and casting

[0063] The smelting and casting of reference embodiment 1. The difference is: the zinc (Zn) content of the two is different.

[0064] III), hot extrusion processing

[0065] Referring to the extrusion process of Example 1.

[0066] IV), microstructure characterization

[0067] Refer to the microstructure characterization of Example 1. The main phases in the alloy are α-Mg and Mg 3 Zn 6 Y (quasicrystalline phase I-phase), the corresponding X-ray spectrum is listed in the appendix figure 1 On; Compared with the alloy in Example 1, the volume percent content of the quasicrystalline phase I-phase significa...

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Abstract

The invention relates to a lanthanon Y which is utilized to strengthen magnesium alloy effectively and a preparation technology thereof, in particular to a quasicrystal phase which is utilized to strengthen Mg-Zn-Y-Zr magnesium alloy and a preparation method thereof, and the problems such as magnesium alloy strengthening, etc. are solved. On the premise of definite Y contents, the volume percentage of the quasicrystal phase which is led into a magnesium alloy matrix to reach the maximum through reasonably choosing the rate between Zn and Y in the alloy (the rate between Zn and Y ranges from 6 to 15), so as to prepare the Mg-Zn-Y-Zr magnesium alloy with low density, high strength and better plasticity. The magnesium alloy material has the components and the contents thereof as follows: the content of zinc (Zn) ranges from 5 to 30 percent; the content of yttrium (Y) ranges from 0.5 to 5 percent; the content of zirconium (Zr) ranges from 0.3 to 0.8 percent, and the others are magnesium (Mg); all the percentage are weight percentage. The magnesium alloy material are processed through alloy melting and subsequent hot extrusion processing and deformed into products, and the operation of the processing technology is simple and convenient. The tensile strength of the material satisfies that Sigma (b) ranges from 290 to 360MPa, the yield stress delta0.2 ranges from 175 to 260MPa, the unit extension Delta ranges from 10 to 18 percent, and the density is 1.84 to 2.73g / cm<3>.

Description

technical field [0001] The invention relates to a method for effectively utilizing rare earth element Y to strengthen magnesium alloys and its preparation technology, especially a deformed Mg-Zn-Y-Zr series magnesium alloy material with low density, high strength and good plasticity—quasicrystalline phase A strengthened magnesium alloy and a method for preparing the alloy material. Background technique [0002] As a new type of metal material, magnesium alloy has the advantages of low density, high specific strength and specific stiffness, which makes magnesium alloy have potential wide application prospects in high-tech fields such as aerospace and automobiles. Compared with other magnesium alloys, due to the higher yield and tensile strength of Mg-Zn-Y-Zr deformed magnesium alloys at room temperature and high temperature, there are many research reports on their mechanical properties. The results show that the Mg-Zn-Y-Zr magnesium alloy is mainly formed by the quasicrysta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03B22D21/04C22F1/06
Inventor 许道奎韩恩厚陈荣石刘路高国忠
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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