Magnesium alloy boride iron illiminating flux and its production method

A technology of borides and magnesium alloys, applied to magnesium alloy iron removal flux, magnesium alloy iron removal flux using borides and its production field, can solve the problem of excessive titanium content in magnesium alloys, difficulty in large-scale promotion and application, and increase the cost of magnesium alloys and other problems, to achieve the effect of less harmful gas, improved mechanical properties and corrosion resistance, and less iron removal dosage

Inactive Publication Date: 2004-03-03
SHANGHAI HAOHUA MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of titanium hydride powder, titanium sponge and titanium tetrachloride, the cost of magnesium alloy is greatly increased, and it is difficult to promote and apply it on a large scale
In addition, the above-mentioned several titanium compounds are likely to cause the titanium content in the magnesium alloy to exceed the standard, and because titanium tetrachloride is in a liquid state at room temperature, it is extremely inconvenient to add it into the magnesium melt as a flux. The equipment and processes used are relatively complicated and difficult to operate. Therefore it is necessary to develop a new magnesium alloy iron removal flux

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Magnesium alloy iron removal flux composition (mass percentage): 40% magnesium chloride, 25% potassium chloride, 15% sodium chloride, 8% calcium chloride, 5% calcium fluoride, 6.3% barium chloride, 0.7% boron oxide .

[0012] The production method of the iron removal flux is as follows: after the crucible is heated to about 250°C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, and after the temperature is partially melted, calcium fluoride is added and the temperature is raised to 750°C. ℃, stir evenly, pour into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 20 sieve. Boron oxide is then added and mixed with a ball mill. The prepared flux is put into an airtight container for later use.

[0013] When in use, when the magnesium alloy is smelted in the resistance crucible furnace and the temperature rises to 730°C, 3% of the iron-removing flux is continuously s...

Embodiment 2

[0015] Magnesium alloy iron removal flux composition (mass percentage): 50% magnesium chloride, 15% potassium chloride, 20% sodium chloride, 5% calcium chloride, 6.5% calcium fluoride, 2% barium chloride, 1.5% sodium borate .

[0016] The production method of the iron removal flux is as follows: after the crucible is heated to about 300°C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, and after the temperature is partially melted, calcium fluoride is added, and the temperature is raised to 780 ℃, 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. Sodium borate was then added and mixed with a ball mill. The prepared flux is put into an airtight container for later use.

[0017] When in use, when the magnesium alloy is smelted in the resistance crucible furnace and the temperature rises to about 740 ° C, 3% refining agent is continuously s...

Embodiment 3

[0019] Magnesium alloy iron removal flux composition (mass percentage): 50% magnesium chloride, 20% potassium chloride, 10% sodium chloride, 3% calcium chloride, 10% calcium fluoride, 6% barium chloride, 0.5% boron oxide , 0.5% sodium borate.

[0020] The production method of the iron removal flux is as follows: after the crucible is heated to about 300°C, magnesium chloride, potassium chloride, sodium chloride, calcium chloride and barium chloride are added, and after the temperature is partially melted, calcium fluoride is added, and the temperature is raised to 790 ℃, stir evenly, pour into blocks. After crushing, put it into a ball mill and grind it into powder, and sieve it with a No. 40 sieve. Then add boron oxide and sodium borate and mix with a ball mill. The prepared flux is put into an airtight container for later use.

[0021] When in use, when the magnesium alloy is smelted in the resistance crucible furnace and the temperature rises to about 740 ° C, 3% refinin...

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Abstract

A deironing boride flux for Mg-alloy contains magnesium chloride, potassium chloride, sodium chloride, calcium chloride, calcium fluoride, barium chloride, and boron oxide and/or sodium borate as deironing agent. Its advantages are high power removing impurities and Fe from molten Mg-alloy, easy separation, and low cost.

Description

Technical field: [0001] The invention relates to a magnesium alloy iron removal flux and a production method thereof, in particular to a magnesium alloy iron removal flux using borides and a production method thereof, belonging to the technical 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. 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; especially magnesium alloys with high iron content , prone to chemical primary battery corrosion, greatly reducing the corrosion resistance of the alloy. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/10C22B26/22C22C1/06C22C23/00
Inventor 吴国华高洪涛丁文江
Owner SHANGHAI HAOHUA MOLD
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