Composite melting agent for reinfing crystal grains of aluminium magnesium alloy and preparation thereof

A technology of grain refinement and magnesium alloy, applied in the fields of metal materials and metallurgy, can solve the problems of narrow application range and single function, and achieve the effect of improving the metamorphic effect, simplifying the processing process, and reducing harmful gases

Inactive Publication Date: 2005-01-26
SHANGHAI HAOHUA MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing magnesium alloy flux with single function and narrow application range, and propose a novel magnesium-aluminum series magnesium alloy grain-refining composite flux and its preparation method. The prepared composite flux is used The process has strong activity, which can not only remove non-metallic inclusions in the magnesium melt, but also effectively refine the magnesium alloy grains, and has a good effect on slag removal, degassing, modification and refinement of the melt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Magnesium alloy grain refining multifunctional composite flux composition (mass percentage): 50% magnesium chloride (MgCl 2 ), 10% potassium chloride (KCl), 10% sodium chloride (NaCl), 5% calcium chloride (CaCl 2 ), 12% calcium fluoride (CaF 2 ), 1% barium chloride (BaCl 2 ), hexachloroethane 1%, magnesium carbonate 10% and calcium carbonate 1%.

[0014] The production method of this Mg-Al series magnesium alloy grain refinement multifunctional composite flux is as follows: after the crucible is heated up to about 250°C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, and the temperature is raised to After partially melting, add calcium fluoride, raise the temperature to 780°C, stir evenly, and cast into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 30 sieve. Then hexachloroethane, magnesium carbonate and calcium carbonate were added and mixed with a ball mil...

Embodiment 2

[0017] Magnesium alloy grain refining multifunctional composite flux composition (mass percentage): 40% magnesium chloride (MgCl 2 ), 20% potassium chloride (KCl), 10% sodium chloride (NaCl), 1% calcium chloride (CaCl 2 ), 5% calcium fluoride (CaF 2 ), 5% barium chloride (BaCl 2 ), 1% hexachloroethane, 15% magnesium carbonate and 3% strontium carbonate.

[0018] The production method of this Mg-Al series magnesium alloy grain refining multifunctional composite flux is as follows: after the crucible is heated up to about 300°C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, and the temperature is raised to After partially melting, add calcium fluoride, raise the temperature to 760°C, stir evenly, and cast into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 20 sieve. Then hexachloroethane, magnesium carbonate and strontium carbonate were added and mixed with a ball mi...

Embodiment 3

[0021] Magnesium alloy grain refining multifunctional composite flux composition (mass percentage): 40% magnesium chloride (MgCl 2 ), 10% potassium chloride (KCl), 20% sodium chloride (NaCl), 3% calcium chloride (CaCl 2 ), 10% calcium fluoride (CaF 2 ), 3% barium chloride (BaCl 2 ), hexachloroethane 4%, magnesium carbonate 5% and calcium carbonate 5%.

[0022]The production method of this Mg-Al series magnesium alloy grain refinement multifunctional composite flux is as follows: after the crucible is heated up to about 350°C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, and the temperature is raised to After partially melting, add calcium fluoride, raise the temperature to 790°C, stir evenly, and cast into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 40 sieve. Then hexachloroethane, magnesium carbonate and calcium carbonate were added and mixed with a ball mill....

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Abstract

A composite flux for fining the crystal grains of MgAl-series Mg alloy contains magnesium chloride, potassium chloride, sodium chloride, calcium chloride, calcium fluoride, barium chloride, hexachloroethane, magnesium carbonate and calcium (or strontium) carbonate. Its advantages are high effect and high chemical stability.

Description

Technical field: [0001] The invention relates to a novel magnesium alloy flux and a preparation method thereof, in particular to a Mg-Al series magnesium alloy grain refinement composite flux with a modification and refinement effect and a preparation method thereof. It belongs to the field of metal materials and metallurgy. Background technique: [0002] Magnesium is chemically active. Magnesium alloys often contain a large amount of oxides and impurity elements such as Fe, Ni, and Cu. These impurities significantly reduce the mechanical properties and corrosion resistance of magnesium alloys. Therefore, during the smelting process of magnesium alloys, fluxes should be used for refining treatment. The purpose of refining treatment is to remove impurity elements and non-metallic inclusions such as oxide scales mixed into the alloy. It is required that the flux can adsorb impurities well and be completely separated from the magnesium alloy melt to avoid flux inclusions, othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C23/02
Inventor 吴国华卢晨丁文江翟春泉徐小平
Owner SHANGHAI HAOHUA MOLD
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