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A kind of preparation method of magnesium-yttrium alloy

An alloy and yttrium powder technology, applied in the field of magnesium-rare earth alloy preparation, can solve the problems of inability to form high-purity magnesium-yttrium alloy, endanger human health, generate toxic gas, etc., and achieve strong controllability of yttrium content, easy preparation and distribution. uniform effect

Inactive Publication Date: 2016-03-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned preparation methods not only consume a lot of energy, but also produce toxic gases during the preparation process, pollute the environment, and endanger human health. In addition, the preparation of magnesium-yttrium master alloy by these methods will inevitably introduce Impurity elements such as Fe, Ni, Mn, etc. cannot form high-purity magnesium-yttrium alloys, which is also very unfavorable for the preparation of Mg-Zn-Y quasi-crystal phases from magnesium-yttrium alloys.

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  • A kind of preparation method of magnesium-yttrium alloy
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  • A kind of preparation method of magnesium-yttrium alloy

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Embodiment 1

[0038] Design ingredients according to Mg-20%Y alloy, and its preparation method is:

[0039] 1. Mix Mg powder and Y powder evenly by wet method according to the volume ratio of 1:1 and dry naturally. Weigh 200 grams of the mixed powder, and press the mixed powder on a tablet machine with a pressure of 50 MPa to form a round block. The density is 71.5%; the wet mixing method is: adding magnesium powder and yttrium powder to an appropriate amount of absolute ethanol, and mixing them evenly in agate and platinum (the same below);

[0040] 2. Dry the pressed round block in an oven and place it in a quartz tube, disperse and add 521 grams of magnesium particles around the block, then fill the quartz tube with high-purity argon (99.999%) three times, then vacuumize it and use quartz The plug seals the quartz tube, and the vacuum inside the quartz tube is 1Pa after vacuum sealing;

[0041] 3. Place the vacuum-sealed quartz tube in a vertical tube furnace that can tilt and swing, he...

Embodiment 2

[0046] Design ingredients according to Mg-25%Y alloy, and its preparation method is:

[0047] 1. Mix Mg powder and Y powder uniformly by wet method according to the volume ratio of 1:1 and dry naturally. Weigh 200 grams of the mixed powder, and press the mixed powder on a tablet machine with a pressure of 55 MPa to form a round block. The density of the block is 73.1%;

[0048] 2. Dry the pressed round block in an oven and place it in a quartz tube, disperse and add 376 grams of magnesium particles around the block, then fill the quartz tube with high-purity argon (99.999%) three times, then vacuumize it and use quartz The plug seals the quartz tube, and the vacuum inside the quartz tube is 0.8Pa after vacuum sealing;

[0049] 3. Place the vacuum-sealed quartz tube in a vertical tube furnace that can tilt and swing, heat up and melt, and raise the temperature from room temperature to 800°C at a rate of 5°C / min, and then keep it warm for 1.5h. The tube furnace is constantly s...

Embodiment 3

[0052] Design ingredients according to Mg-30%Y alloy, and its preparation method is:

[0053] 1. Mix Mg powder and Y powder uniformly by wet method according to the volume ratio of 1:1 and dry naturally. Weigh 200 grams of the mixed powder, and press the mixed powder on a tablet machine with a pressure of 55 MPa to form a round block. The density of the block is 73.3%;

[0054] 2. Dry the pressed round block in an oven and place it in a quartz tube, disperse and add 281 grams of magnesium particles around the block, then fill the quartz tube with high-purity argon (99.999%) three times, then vacuumize it and use quartz The plug seals the quartz tube, and the vacuum inside the quartz tube is 0.5Pa after vacuum sealing;

[0055] 3. Place the vacuum-sealed quartz tube in a vertical tube furnace that can tilt and swing, heat up and melt, and raise the temperature from room temperature to 820°C at a rate of 5°C / min, and then keep it warm for 1.5h. The tube furnace is constantly s...

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Abstract

The invention discloses a preparation method of a magnesium-yttrium alloy. The steps include: using magnesium powder and magnesium granules as the raw material of elemental magnesium, and using yttrium powder as the raw material of elemental yttrium; fully mixing the magnesium powder and yttrium powder, and pressing them into blocks ;According to the composition of the magnesium-yttrium alloy, put the magnesium-yttrium block and magnesium particles into the quartz tube, vacuumize the quartz tube and seal it; place the quartz tube vertically, heat the raw materials to melt, and the quartz tube along its center during the melting process The shaft swings left and right, and the quartz tube is cooled rapidly after melting, and the quartz tube is broken after the liquid in the quartz tube is completely solidified, and the obtained product is a magnesium-yttrium alloy. The preparation process of the present invention is simple, and through the matching of various conditions, no impurity elements are mixed in the preparation process, the alloy with the required content can be obtained more accurately, the yttrium content is highly controllable, and the obtained magnesium-yttrium alloy has almost no impurities. Yttrium exists in the form of Mg24Y5, which can be used as a stable raw material for preparing Mg-Zn-Y quasicrystals, and the industrialization prospect of the process is good.

Description

technical field [0001] The invention relates to a preparation method of a magnesium-yttrium master alloy, in particular to a preparation method of a magnesium-yttrium alloy with less impurities and strong content controllability, and belongs to the technical field of magnesium-rare earth alloy preparation. Background technique [0002] Magnesium alloy is the lightest structural metal material currently used. It has high specific strength, specific stiffness and excellent casting performance. Application prospects. Although magnesium alloys have excellent room temperature properties, their poor heat resistance limits the application of magnesium alloys. Therefore, it is the key to the wide application of magnesium alloys to improve the high temperature properties of magnesium alloys in various ways. At present, in addition to improving the heat resistance of magnesium alloys by adding rare earth and other elements, it is also an important research method to improve the creep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/04
Inventor 赵德刚于荃王振卿左敏滕新营
Owner UNIV OF JINAN