A flux for purifying and refining composite treatment of magnesium rare earth alloy melt and its application

A magnesium rare earth alloy and composite treatment technology, which is applied in the field of magnesium alloys, can solve the problems of melt purification and refinement treatment, such as Zr oxidation and burning, and achieve the effects of improving wetting and capture speed, reducing oxidation tendency, and increasing density

Active Publication Date: 2022-02-25
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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  • A flux for purifying and refining composite treatment of magnesium rare earth alloy melt and its application
  • A flux for purifying and refining composite treatment of magnesium rare earth alloy melt and its application

Examples

Experimental program
Comparison scheme
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 refinement composite treatment flux. The mass percentage range of ingredients is 30-40% magnesium chloride, 8-15% potassium chloride, 8-15% sodium chloride, 15-20% barium chloride, 5-8% barium sulfate, 10-15% zirconium diboride , 10-15% zirconium sulfate. First melt and mix magnesium chloride, potassium chloride, sodium chloride, barium chloride, and barium sulfate, cool and solidify to obtain a refining agent compound salt block, and then mix and sieve the refining agent compound salt block with zirconium diboride and zirconium sulfate A purification and refinement composite treatment flux is prepared. The composite flux of the invention can improve the purification efficiency of the melt, prolong the time of Zr refinement, realize the refinement and purification treatment of the alloy melt in one step, and greatly shorten the preparation process of the magnesium-rare-earth alloy melt.

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 Patents(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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