Mg-Gd-Y-Zr magnesium alloy refining flux and producing method thereof

A technology of magnesium alloy and flux, which is applied in the field of metal materials and metallurgy to achieve the effects of suppressing loss, improving purity and strong activity

Active Publication Date: 2009-08-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, during the smelting and purification process of Mg-Gd-Y-Zr magnesium alloy, the loss of zirconium element in the magnesium alloy is often as high as 80% or more

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mg-Gd-Y-Zr magnesium alloy refining flux composition (mass percentage): 30% potassium chloride (KCl), 20% barium chloride (BaCl 2 ), 10% sodium chloride (NaCl), 10% calcium chloride (CaCl 2 ), 3% calcium fluoride (CaF 2 ), 5% cryolite (Na 3 AlF 6 ), 8% gadolinium chloride (GdCl 3 ), 8% yttrium carbonate [Y 2 (CO 3 ) 3 ], 6% zirconium tetrachloride (ZrCl 4 ).

[0015]The production method of the Mg-Gd-Y-Zr magnesium alloy refining flux of the present invention is as follows: after the crucible is heated to 300°C, potassium chloride, barium chloride, sodium chloride, calcium chloride, cryolite are added, and the temperature is raised to partially melt Finally, 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. 20 sieve. Then gadolinium chloride, yttrium carbonate and zirconium tetrachloride were added and mixed with a ball mill. ...

Embodiment 2

[0018] Mg-Gd-Y-Zr magnesium alloy refining flux composition (mass percentage): 50% potassium chloride (KCl), 5% barium chloride (BaCl 2 ), 3% sodium chloride (NaCl), 20% calcium chloride (CaCl 2 ), 8% calcium fluoride (CaF 2 ), 2% cryolite (Na 3 AlF 6 ), 5% gadolinium carbonate [Gd 2 (CO 3 ) 3 ], 5% yttrium chloride (YCl 3 ), 2% potassium fluorozirconide (K 2 ZrF 6 ).

[0019] The production method of the Mg-Gd-Y-Zr magnesium alloy refining flux of the present invention is as follows: after the crucible is heated to 350°C, potassium chloride, barium chloride, sodium chloride, calcium chloride, and cryolite are added, and the temperature is raised to partially melt Finally, add calcium fluoride, raise the temperature to about 770°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 gadolinium carbonate, yttrium chloride and potassium fluorozirconide are added and mixed with a ba...

Embodiment 3

[0022] Mg-Gd-Y-Zr magnesium alloy refining flux composition (mass percentage): 45% potassium chloride (KCl), 12% barium chloride (BaCl 2 ), 5% sodium chloride (NaCl), 15% calcium chloride (CaCl 2 ), 5% calcium fluoride (CaF 2 ), 4% cryolite (Na 3 AlF 6 ), 3% gadolinium fluoride (GdF 3 ), 3% yttrium fluoride (YF 3 ), 8% zirconium tetrachloride (ZrCl 4 ).

[0023] The production method of the Mg-Gd-Y-Zr magnesium alloy refining flux of the present invention is as follows: after the crucible is heated to 400 ° C, potassium chloride, barium chloride, sodium chloride, calcium chloride, cryolite are added, and the temperature is raised to partially melt Finally, add calcium fluoride, raise the temperature to about 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. 40 sieve. Then gadolinium fluoride, yttrium fluoride and zirconium tetrachloride were added and mixed with a ball mill. The prepared...

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Abstract

The invention provides a Mg-Gd-Y-Zr magnesium alloy refining flux and a production method thereof. The mass percentages of the chemical components of the flux are: 30-50% potassium chloride, 5-20% barium chloride, 2-10% Sodium chloride, 10-20% calcium chloride, 2-8% calcium fluoride, 1-5% cryolite, 3-8% gadolinium compound, 3-8% yttrium compound, 2-8% zirconium compound. The gadolinium compound is gadolinium chloride, gadolinium carbonate or gadolinium fluoride, the yttrium compound is yttrium chloride, yttrium carbonate or yttrium fluoride, and the zirconium compound is zirconium tetrachloride or potassium zirconium fluoride. The flux of the invention has better melting point, viscosity and wettability, and the slag removal performance is greatly improved. Since the flux does not contain magnesium chloride, it does not interact with gadolinium and yttrium rare earth elements in the alloy, and will not cause chemical reaction loss of rare earth elements during the refining process, especially suitable for the refining of Mg-Gd-Y-Zr magnesium alloy melts Purification treatment to improve the refining effect of magnesium melt.

Description

technical field [0001] The invention relates to a Mg-Gd-Y-Zr magnesium alloy refining flux and a production method thereof, which are used for removing impurity elements and non-metallic inclusions mixed into the alloy during the smelting process of the Mg-Gd-Y-Zr magnesium alloy, And suppress the loss of rare earth elements, belonging to the field of metal materials and metallurgy. Background technique [0002] Magnesium alloy is the lightest metal structural material in practical application, and has the characteristics of low density, high specific strength and rigidity, good vibration damping, strong electromagnetic shielding ability and easy recycling. Since the 1990s, industrially developed countries have attached great importance to the research and development of magnesium alloys, and magnesium alloys have been widely used in the fields of national defense, aerospace, automobiles and electronic information industries, and have very broad market prospects. [0003] W...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22B26/22
Inventor 吴国华丁文江
Owner SHANGHAI JIAO TONG UNIV
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