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Evaporative pattern casting magnesium alloy and smelting method thereof

A technology of lost foam casting and magnesium alloy, which is applied in the field of metal materials and metallurgy, can solve the problems that have not yet been reported on lost foam casting magnesium alloy materials, and achieve broad commercial application prospects, broad market application prospects, and good refinement Effect

Inactive Publication Date: 2004-08-25
SHANGHAI AIERSI LIGHT ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on lost foam casting magnesium alloys is focused on mold filling [Zili Liu, Jingyu Hu, Qudong Wang, etc.Evaluation of Vacuum on Mold Filling in Magnesium EPC Process.Journal of Materials Processing Technology.2002, 120 / 1- 3:94-100], there is no report on lost foam casting magnesium alloy materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Alloy composition (weight percentage): 7.5% Al, 0.25% Zn, 0.15% Mn, 1.0% RE (Ce-rich mixed rare earth), 0.05% Ti, 0.01% C, limiting impurity element Si≤0.01%, Fe≤0.004%, Cu≤0.015%, Ni≤0.002%, the rest is Mg.

[0017] Configure the alloy according to the above composition, in the CO 2 +SF 6 Under gas protection, add 8204g of industrial pure magnesium into the resistance crucible furnace, and then sprinkle a small amount of covering agent for magnesium alloy smelting into the furnace. After the alloy is completely melted, add 521g of industrial pure aluminum, 25g of industrial pure zinc, and Al 150 grams of -10Mn alloy, 1000 grams of Mg-10RE alloy, and 100 grams of Al-5Ti-C alloy. After dissolving, stir the alloy liquid thoroughly. When the temperature is increased to 730℃, refining with a refining agent for 10 minutes, remove the surface scum, then keep warm Let it stand for 20 minutes. When the alloy temperature reaches 740℃, it can be poured with a ladle. The normal temper...

Embodiment 2

[0019] Alloy composition (weight percentage): 9% Al, 0.35% Zn, 0.45% Mn, 0.8% RE (Ce-rich mixed rare earth), 0.1% Ti, 0.02% C, limiting impurity element Si≤0.01%, Fe≤0.004%, Cu≤0.015%, Ni≤0.002%, the rest is Mg.

[0020] Configure the alloy according to the above composition, in the CO 2 +SF 6 Under gas protection, add 8928 grams of industrial pure magnesium into the resistance crucible furnace, and then sprinkle a small amount of covering agent for magnesium alloy melting into the furnace. After the alloy is completely melted, add 307 grams of industrial pure aluminum, 35 grams of industrial pure zinc, and Al 450 grams of -10Mn alloy, 80 grams of mixed RE alloy, and 200 grams of Al-5Ti-C alloy. After dissolving, stir the alloy liquid thoroughly. When the temperature is increased to 730℃, refining with a refining agent for 10 minutes, remove the surface scum, and then keep it at rest. In 20 minutes, when the alloy temperature reaches 730℃, it can be poured with a ladle. The normal...

Embodiment 3

[0022] Alloy composition (weight percentage): 10% Al, 0.45% Zn, 0.3% Mn, 0.6% RE (Ce-rich mixed rare earth), 0.2% Ti, 0.03% C, limiting impurity element Si≤0.01%, Fe≤0.004%, Cu≤0.015%, Ni≤0.002%, the rest is Mg.

[0023] Configure the alloy according to the above composition, in the CO 2 +SF 6Under gas protection, 8302 grams of industrial pure magnesium was added to the resistance crucible furnace, and then a small amount of covering agent for magnesium alloy smelting was withdrawn in the furnace. After the alloy was completely melted, 403 grams of industrial pure aluminum, 45 grams of industrial pure zinc, and Al 300 grams of -10Mn alloy, 600 grams of Mg-10RE alloy, 300 grams of Al-5Ti-C alloy, and 50 grams of Al-10Ti alloy. After dissolving, fully stir the alloy liquid, continue to heat up to 740 ℃ with a refining agent for 10 minutes, fish Remove the surface dross, and then keep it for 20 minutes. When the alloy temperature reaches 735℃, it can be poured with a ladle. The norma...

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Abstract

The present invention relates to a evaporative pattern casting special-purpose magnesium alloy and its smelting method. It is characterized by that in the formula of magnesium alloy the content of zinc is reduced, the contents of Al and Mn elements are properly regulated, and the mixed rare earth RE richly containing Ce and elements of Ti and C are added so as to fine the crystal grains of evaporative pattern casting magnesium alloy, reduce its dispersed shrinkage defect and improve its casting property and mechanical property.

Description

Technical field: [0001] The invention relates to a lost foam casting magnesium alloy and a melting method thereof, belonging to the technical field of metal materials and metallurgy. Background technique: [0002] Magnesium alloy is the lightest structural material in practical applications. It has the advantages of light specific gravity, high specific strength, high specific rigidity, damping performance, and good cutting performance. Magnesium alloys have been widely used in industries such as automobiles, aerospace, and telecommunications. Casting is the main forming method of magnesium alloys. At present, magnesium alloys are mainly cast by die casting and sand molds with binders. Lost Foam Casting (LFC or EPC for short) is currently considered as a new economical and effective green casting process to replace the traditional casting process to produce high-quality precision molded castings. It is an important development direction of the casting process and is known as the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D21/04C22C23/02
Inventor 吴国华丁文江
Owner SHANGHAI AIERSI LIGHT ALLOY
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