Composite clarifying flux of La-containing aluminium alloy and its production process

A composite purification and magnesium alloy technology, which is applied in the field of metal materials and metallurgy, to achieve the effects of improving yield, reducing harmful gas, and removing iron and rare earth lanthanum loss

Inactive Publication Date: 2006-05-17
鄂尔多斯市天旭轻合金有限责任公司
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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 address the deficiency of the existing magnesium alloy refining agent, and propose a composite purification flux for lanthanum-containing magnesium alloy and its production method. The loss of rare earth element lanthanum can reduce the content of harmful impurity element iron in the alloy, and also has a good purification function to remove non-metallic inclusions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Lanthanum-containing magnesium alloy composite purification flux composition (mass percentage): 50% magnesium chloride, 15% sodium chloride, 20% potassium chloride, 2% calcium chloride, 3% barium chloride, 5% lanthanum carbonate and 5% tetraboric acid potassium.

[0014] The production method of the flux is as follows: heat the crucible to about 250°C, add magnesium chloride, sodium chloride, potassium chloride, calcium chloride and barium chloride, raise the temperature to 760°C, stir evenly, pour into blocks, break and put Grind into powder with a ball mill and sieve through a No. 20 sieve. Then add lanthanum carbonate and potassium tetraborate and mix them with a ball mill, and put the prepared flux into a closed container for later use.

[0015] When in use, when the magnesium alloy is smelted in the resistance crucible furnace and the temperature rises to 735°C, 2% compound purification flux is continuously sprinkled on the liquid surface and stirred up and down a...

Embodiment 2

[0017] Lanthanum-containing magnesium alloy composite purification flux composition (mass percentage): 40% magnesium chloride, 16% sodium chloride, 15% potassium chloride, 7% calcium chloride, 4% barium chloride, 10% lanthanum carbonate and 8% tetraboric acid potassium.

[0018] The production method of the flux is as follows: after heating the crucible to about 250°C, add magnesium chloride, sodium chloride, potassium chloride, calcium chloride and barium chloride, raise the temperature to 775°C, stir evenly, pour into blocks, break and put Grind into powder with a ball mill and sieve through a No. 30 sieve. Then add lanthanum carbonate and potassium tetraborate and mix them with a ball mill, and put the prepared flux into a closed container for later use.

[0019] When in use, when the magnesium alloy is smelted in the resistance crucible furnace and the temperature rises to 735°C, 2% compound purification flux is continuously sprinkled on the liquid surface and stirred up ...

Embodiment 3

[0021] Lanthanum-containing magnesium alloy composite purification flux composition (mass percentage): 30% magnesium chloride, 19% sodium chloride, 16% potassium chloride, 3% calcium chloride, 5% barium chloride, 12% lanthanum carbonate and 15% tetraboric acid potassium.

[0022] The production method of the flux is as follows: heat the crucible to about 250°C, add magnesium chloride, sodium chloride, potassium chloride, calcium chloride and barium chloride, heat up to 790°C, stir evenly, cast into blocks, break and put Grind into powder with a ball mill and sieve through a No. 40 sieve. Then add lanthanum carbonate and potassium tetraborate and mix them with a ball mill, and put the prepared flux into a closed container for later use.

[0023] When in use, when the magnesium alloy is smelted in the resistance crucible furnace and the temperature rises to 735°C, 2% compound purification flux is continuously sprinkled on the liquid surface and stirred up and down at the same t...

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Abstract

The present invention provides composite clarifying flux of La-containing aluminum alloy and its production process. The composite clarifying flux consists of magnesium chloride 30-50 wt%, sodium chloride 15-25 wt%, potassium chloride 15-25 wt%, calcium chloride 2-7 wt%, barium chloride 3-7 wt%, lanthanum carbonate 5-15 wt% and potassium teraborate 5-15 wt%. The composite clarifying flux has three effects, including inhibiting the loss of RE lanthanum of La-containing aluminum alloy during flux purification, effectively reducing the content of harmful Fe element in the alloy, and powerful adsorption and elimination of non-metal inclusion from the alloy. The composite clarifying flux has high chemical stability, low harmful gas content, easy adding, simple operation and low cost.

Description

technical field [0001] The invention relates to a lanthanum-containing magnesium alloy composite purification flux and a production method thereof, which are used for refining treatment of lanthanum-containing magnesium alloys and belong to the field of metal materials and metallurgy. Background technique [0002] Magnesium alloy has the advantages of low density, high specific strength and specific stiffness, good damping and electromagnetic shielding performance, and has become an important lightweight material in the automotive and electronics industries in recent years. As a common rare earth alloying element in magnesium alloys, lanthanum can enhance the bonding force between magnesium alloy atoms, reduce the atomic diffusion rate, and significantly improve the high temperature performance and casting performance of the alloy. Therefore, lanthanum-containing magnesium alloys have been widely used in recent years. [0003] However, because magnesium is easy to burn, even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C23/06
Inventor 高洪涛吴国华丁文江
Owner 鄂尔多斯市天旭轻合金有限责任公司
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