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Refining agent of Mg alloy and its preparing process

A refining agent and magnesium alloy technology, which is applied in the field of metal materials and metallurgy, can solve the problems of insufficient adsorption of inclusions, unfavorable porosity of magnesium alloys, and no hydrogen fixation effect of flux, so as to improve mechanical properties and corrosion resistance , Improve the refining effect, the effect of appropriate viscosity

Inactive Publication Date: 2002-08-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The RJ2 flux that is commonly used at present is not strong enough to adsorb the inclusions in the magnesium melt, and the flux has no hydrogen fixation effect, which is not conducive to reducing the porosity of the magnesium alloy, and the flux is easily mixed into the alloy liquid to become flux inclusions, which seriously affects the alloy. performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Magnesium alloy refining agent composition (mass percentage): 50% magnesium chloride (MgCl 2 ), 15% potassium chloride (KCl), 15% sodium chloride (NaCl), 5% calcium chloride (CaCl 2 ), 6% calcium fluoride (CaF 2 ), 4% barium chloride (BaCl 2 ), 3% magnesium carbonate, 2% rare earth chloride.

[0011] After the crucible is heated to a certain temperature, add magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride, and after heating up to partial melting, add calcium fluoride, raise the temperature to about 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. 30 sieve. Then magnesium carbonate and rare earth chloride are added and mixed with a ball mill. Prepared flux should be put into airtight container for standby.

[0012] When in use, when the magnesium alloy is smelted in the resistance crucible furnace and the temperature rises to about 740 °...

Embodiment 2

[0014] Magnesium alloy refining agent composition (mass percentage): 45% magnesium chloride (MgCl 2 ), 15% potassium chloride (KCl), 10% sodium chloride (NaCl), 10% calcium chloride (CaCl 2 ), 6% calcium fluoride (CaF 2 ), 4% barium chloride (BaCl 2 ), 8% calcium carbonate, 2% rare earth fluoride.

[0015] The production method of the new refining agent is as follows: after the crucible is heated to a certain temperature, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, after the temperature is raised to partial melting, calcium fluoride is added, and the temperature is raised to 760 ℃, stir evenly, pour into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 30 sieve. Then calcium carbonate and rare earth fluoride are added and mixed with a ball mill. Prepared flux should be put into airtight container for standby.

[0016] When in use, when the magnesium alloy is smel...

Embodiment 3

[0018] Magnesium alloy refining agent composition (mass percentage): 40% magnesium chloride (MgCl 2 ), 10% potassium chloride (KCl), 15% sodium chloride (NaCl), 10% calcium chloride (CaCl 2 ), 6% calcium fluoride (CaF 2 ), 9% barium chloride (BaCl 2 ), 5% strontium carbonate, 5% rare earth carbonate.

[0019] The production method of the new refining agent is as follows: after the crucible is heated to a certain temperature, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, after the temperature is raised to partial melting, calcium fluoride is added, and the temperature is raised to 760 ℃, stir evenly, pour into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 30 sieve. Then strontium carbonate and rare earth carbonate were added and mixed with a ball mill. Prepared flux should be put into airtight container for standby.

[0020] When in use, when the magnesium alloy ...

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Abstract

A refining agent of Mg-alloy contains magnesium chloride (40-60%), potassium chloride (10-25%), sodium chloride (10-25%), calcium chloride (1-10%), calcium fluoride (5-15%), barium chloride (1-10%), nano carbonate adsorbent (1-10%) and rare-earth compound as hidrogen-fixing agent (1-10%). Its advantages include high activity, high effect on fixating hydrogen, removing impurities, and improving mechanical and anticorrosion performance, and high chemical stability.

Description

Technical field: [0001] The invention relates to a novel magnesium alloy refining agent and a production method, in particular to a novel magnesium alloy refining agent and a production method using a nano-carbonate adsorbent and a rare earth compound hydrogen-fixing agent, belonging 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, a refining agent 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...

Claims

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Application Information

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IPC IPC(8): C22B9/10C22B26/22
Inventor 吴国华丁文江
Owner SHANGHAI JIAO TONG UNIV
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