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Method for preparing LPSO (Long Period stacking ordered) phase enhanced magnesium alloy gradient material

A gradient material and magnesium alloy technology, applied in the field of intermetallic compound preparation, achieves the effects of simple operation, stable quality, improved service life and service environment

Inactive Publication Date: 2014-03-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the results of patent novelty search, there is no other report on the preparation of LPSO phase-reinforced magnesium alloy gradient materials at home and abroad

Method used

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  • Method for preparing LPSO (Long Period stacking ordered) phase enhanced magnesium alloy gradient material
  • Method for preparing LPSO (Long Period stacking ordered) phase enhanced magnesium alloy gradient material
  • Method for preparing LPSO (Long Period stacking ordered) phase enhanced magnesium alloy gradient material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The method for preparing the LPSO phase-reinforced magnesium alloy gradient material, its specific steps are as follows:

[0024] (1) First, pure magnesium and pure yttrium are mixed and processed to prepare Mg-Y alloy blocks, and then pure magnesium blocks, pure zinc blocks, and Mg-Y alloy blocks are stacked in order from bottom to top, among which Mg, Y, Zn The atomic number ratio is 57:1.5:1, and the purity of pure magnesium, pure yttrium, and pure zinc is over 99.98%;

[0025] (2) Divide the superimposed metal block prepared in step (1) into two parts, the upper part and the lower part, and heat the two parts at the same time to 350 ° C for 30 minutes to remove water vapor, then pass in protective gas and heat up at a rate of 10 ° C / min The melting rate was increased to 720°C for 1 hour, and the protective gas was Ar gas;

[0026] (3) After completing step (2) smelting process, stop the heating of the lower part and pass cooling water to cool the lower part, adju...

Embodiment 2

[0029] The method for preparing the LPSO phase-reinforced magnesium alloy gradient material, its specific steps are as follows:

[0030] (1) First, pure magnesium and pure yttrium are mixed and processed to prepare Mg-Y alloy blocks, and then pure magnesium blocks, pure zinc blocks, and Mg-Y alloy blocks are stacked in order from bottom to top, among which Mg, Y, Zn The atomic number ratio is 79:3:2, and the purity of pure magnesium, pure yttrium, and pure zinc is over 99.98%;

[0031] (2) Divide the superimposed metal block prepared in step (1) into two parts, the upper part and the lower part, and heat the two parts at the same time to 400 °C, keep it warm, remove water vapor for 10 minutes, and then pass in protective gas and heat up at 10 °C / min Melting at 780°C for 1 hour, the protective gas is SF 6 and CO 2 mixed gas;

[0032] (3) After completing the smelting process of step (2), stop the heating of the lower part and pass in cooling water to cool the lower part, and...

Embodiment 3

[0034] The method for preparing the LPSO phase-reinforced magnesium alloy gradient material, its specific steps are as follows:

[0035] (1) First, pure magnesium and pure yttrium are mixed and processed to prepare Mg-Y alloy blocks, and then pure magnesium blocks, pure zinc blocks, and Mg-Y alloy blocks are stacked in order from bottom to top, among which Mg, Y, Zn The atomic number ratio is 21:1.3:1, and the purity of pure magnesium, pure yttrium, and pure zinc is over 99.98%;

[0036] (2) Divide the superimposed metal block prepared in step (1) into two parts, the upper part and the lower part, and heat the two parts at the same time to 300 °C and keep it warm for 50 minutes to remove water vapor, then pass in protective gas and heat up at a rate of 5 °C / min Melting at 700°C for 3 hours, in which the protective gas is Ar gas;

[0037] (3) After completing the melting process of step (2), stop the heating of the lower part and pass in cooling water to cool the lower part, a...

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Abstract

The invention relates to a method for preparing an LPSO (Long Period stacking ordered) phase enhanced magnesium alloy gradient material, belonging to the field of intermetallic compound preparation technology. The method comprises the steps of firstly, mixing pure magnesium and pure yttrium to prepare an Mg-Y alloy block, and then sequentially overlaying a pure magnesium block, a pure zinc block and the Mg-Y alloy block from bottom to top; simultaneously heating the overlaid metal blocks prepared in the above step and divided into the upper part and the lower part so as to remove vapor, and then introducing a protective gas for melting; after the melting process is completed, stopping the heating to the lower part, introducing cooling water so as to cool the lower part, regulating the heating temperature of the upper part to be below 300 DEG C for one-way cooling, then stopping heating, cooling to room temperature, thus preparing the LPSO phase-enhanced magnesium alloy gradient material. According to the method, the LPSO phase enhanced gradient material can be prepared through upward dispersion of Mg element with lower density and downward settlement of Zn and Y atoms with high density in the one-way cooling process.

Description

technical field [0001] The invention relates to a method for preparing an LPSO phase-reinforced magnesium alloy gradient material, which belongs to the technical field of intermetallic compound preparation. Background technique [0002] Studies have shown that intermetallic compounds are composed of metal bonds, covalent bonds, and ionic bonds, so they have unique physical, chemical, electrical, magnetic, and mechanical properties. LPSO (Long period stacking ordered) phase combines the advantages of ceramics and metals, showing excellent creep resistance, hydrogen storage performance, excellent thermal conductivity, oxidation resistance and acid and alkali corrosion resistance. Increase the volume percentage of LPSO reinforced phase in magnesium alloys to prepare magnesium alloys reinforced with high volume percentage LPSO phases, even high-purity LPSO phases, using the superior properties of LPSO phases such as wear resistance, corrosion resistance, heat resistance and cree...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C23/06
Inventor 冯中学史庆南陈亮维李富斌曹洋
Owner KUNMING UNIV OF SCI & TECH
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