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Magnesium-rare earth alloy melt purification and refinement composite treatment flux and application thereof

A magnesium rare earth alloy and composite treatment technology, applied in the field of magnesium alloys, can solve the problems of Zr oxidation burning and other problems of melt purification and refinement treatment effect, and achieve the effects of improving the wetting and capturing speed, increasing the density, and reducing the oxidation tendency.

Active Publication Date: 2021-08-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] For the above-mentioned deficiencies that exist in the prior art, the purpose of the present invention is to solve the problem that the purification and refinement treatment effects of the melt are mutually restricted when the conventional purification and refinement step-by-step treatment methods are used to process the magnesium-rare-earth alloy melt. There are three bottleneck problems of repeated heating and cooling, and serious oxidation and burning of Zr. A flux for purifying and refining composite treatment of magnesium rare earth alloy melt and its application is provided.

Method used

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  • Magnesium-rare earth alloy melt purification and refinement composite treatment flux and application thereof
  • Magnesium-rare earth alloy melt purification and refinement composite treatment flux and application thereof

Examples

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Effect test

Embodiment 1

[0031] Taking Mg-8Gd-3Y-0.5Zr (wt%) magnesium rare earth alloy as an example, the composite flux of the present invention is used for melt treatment.

[0032] Purification refinement composite treatment flux composition (mass percentage): 30% magnesium chloride, 8% potassium chloride, 8% sodium chloride, 16% barium chloride, 8% barium sulfate, 15% zirconium diboride, 15% zirconium sulfate .

[0033] First add magnesium chloride to the crucible and heat it to 720°C to make it reach a molten state, then add potassium chloride, sodium chloride, barium chloride, and barium sulfate in batches in sequence, stir fully after all the salts are melted, and cast to obtain Refining agent compound salt block, then crush the refining agent compound salt block and pass through a 200-mesh sieve, then put the sieved refining agent compound salt powder, zirconium diboride, and zirconium sulfate into a ball mill, and take it out after ball milling for 5 hours. Go through a 50-mesh sieve again t...

Embodiment 2

[0037] Taking Mg-8Gd-3Y-0.5Zr (wt%) magnesium rare earth alloy as an example, the composite flux of the present invention is used for melt treatment.

[0038] Purification refinement composite treatment flux composition (mass percentage): 40% magnesium chloride, 10% potassium chloride, 10% sodium chloride, 15% barium chloride, 5% barium sulfate, 10% zirconium diboride, 10% zirconium sulfate .

[0039] First add magnesium chloride to the crucible and heat it to 730°C to make it reach a molten state, then add potassium chloride, sodium chloride, barium chloride, and barium sulfate in batches in sequence, stir fully after all the salts are melted, and cast to obtain Refining agent compound salt block, then crush the refining agent compound salt block and pass through a 200-mesh sieve, then put the sieved refining agent compound salt powder, zirconium diboride and zirconium sulfate into a ball mill, and take it out after ball milling for 6 hours. Go through a 100-mesh sieve again...

Embodiment 3

[0043] Taking Mg-8Gd-3Y-0.5Zr (wt%) magnesium rare earth alloy as an example, the composite flux of the present invention is used for melt treatment.

[0044] Purification refinement composite treatment flux composition (mass percentage): 34% magnesium chloride, 10% potassium chloride, 10% sodium chloride, 16% barium chloride, 6% barium sulfate, 12% zirconium diboride, 12% zirconium sulfate .

[0045] First add magnesium chloride to the crucible and heat it to 740°C to make it reach a molten state, then add potassium chloride, sodium chloride, barium chloride, and barium sulfate in batches in sequence, stir fully after all the salts are melted, and cast to obtain Refining agent compound salt block, then crush the refining agent compound salt block and pass through a 200-mesh sieve, then put the sieved refining agent compound salt powder, zirconium diboride, and zirconium sulfate into a ball mill, and take it out after ball milling for 8 hours. Go through a 150-mesh sieve agai...

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Abstract

The invention discloses a magnesium-rare earth alloy melt purification and refinement composite treatment flux. The mass percentage range of the components is as follows: 30-40% of magnesium chloride, 8-15% of potassium chloride, 8-15% of sodium chloride, 15-20% of barium chloride, 5-8% of barium sulfate, 10-15% of zirconium diboride and 10-15% of zirconium sulfate. A preparation method comprises the following steps of: melting and mixing magnesium chloride, potassium chloride, sodium chloride, barium chloride and barium sulfate, performing cooling and solidifying to obtain a refining agent composite salt block, and then mixing and sieving the refining agent composite salt block, zirconium diboride and zirconium sulfate to prepare the purification and refinement composite treatment flux. By adopting the composite flux disclosed by the invention, the melt purification efficiency can be improved; the Zr refining action time can be prolonged; the refining and purification treatment of the alloy melt can be realized in one step; and the preparation process of the magnesium-rare earth alloy melt can be greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloys, and relates to a flux for treating magnesium alloy melts, in particular to a flux for purifying and refining composite treatment of magnesium rare earth alloys and its application. Background technique [0002] Magnesium rare earth alloys have the advantages of low density, high specific strength, and good heat resistance. Therefore, developed countries list magnesium rare earth alloys as one of the priority development materials in aerospace, national defense and military industries, and apply them to launch vehicle cabins , missile cabin, aircraft engine casing and other key components, the aircraft has achieved a significant weight reduction and a significant improvement in maneuverability. It can be seen that magnesium rare earth alloys have a very broad market prospect. Only high-quality alloy melts can produce high-performance castings. The melt treatment of magnesium rare earth ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/02C22C23/06
CPCC22C1/06C22C1/02C22C23/06
Inventor 童鑫吴国华张亮张小龙戚方舟谢赫
Owner SHANGHAI JIAO TONG UNIV
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