CN1410567A - Magnesium alloy desilicon flux and production method - Google Patents
Magnesium alloy desilicon flux and production method Download PDFInfo
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- CN1410567A CN1410567A CN 02145316 CN02145316A CN1410567A CN 1410567 A CN1410567 A CN 1410567A CN 02145316 CN02145316 CN 02145316 CN 02145316 A CN02145316 A CN 02145316A CN 1410567 A CN1410567 A CN 1410567A
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- magnesium
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Abstract
Besides magnesium chloride 15-30%, potassium chloride 15-30%, calcium fluoride 10-20%, barium chloride 8-12% and magnesium fluoride 10-25% etc. the chemical constituent of fusing agent has titanium compound 10-20% and carbonate 1-10% being added. Magnesium chloride and potassium chloride etc. is added into the warmed up crucible. With the magnesium chloride etc. being melted, calcium fluoride and magnesium fluoride is added to the crucible. The fusing agent is made through procedures of heating up, stirring and pouring in bulk, then the procedures of crushing, milling and sifting out as well as with titanium compound and carbonate being added. The invented magnesium alloy provides the advantages of remarkable effect of removal of silica and excellent deslagging performance as well as improving mechanical property and corrosion-resisting properties.
Description
Technical field:
What the present invention relates to is a kind of magnesium alloy silica removal flux and production method, belongs to metallic substance and metallurgical class
Technical field.
Background technology:
It is little that magnesium alloy has density, and specific tenacity and specific rigidity height, damping capacity is good and advantage such as electromagnetic shielding, becomes the important light material of automobile and electron trade in recent years.Along with MAGNESIUM METAL is used more and morely in industry, the purity of magnesium is also had higher requirement, requirement can be removed the metallic impurity such as silicon, iron, nickel, copper and aluminium in the magnesium effectively usually.China adopts the Si reduction method to produce magnesium alloy mostly at present, so silicon content is higher in the magnesium.Silicon is harmful being mingled with in the magnesium alloy, and its solid solubility in magnesium is very little, but small content just can generate the insoluble Mg mutually that big potential difference is arranged with matrix on crystal boundary
2Si, the corrosion stability of reduction alloy.Fragility phase Mg
2Si thermal treatment can not be dissolved, thereby has reduced the plasticity of alloy.Therefore press for the silicon of removing in the magnesium alloy.Generally use RJ2 flux-refining magnesium alloy at present, remove K, Na outside two kinds of metallic impurity, is difficult to remove other metallic impurity (as Fe, Si, Ni etc.).This flux is strong inadequately to the molten intravital inclusion adsorptivity of magnesium, and flux is easy to sneak into alloy liquid and becomes flux and be mingled with, and has a strong impact on the performance of alloy.Present domestic use magnesium alloy flux preferably is the JDMJ refining agent of Mg alloy of Shanghai Communications University's development, and this flux has flux protection and gas shield double effects concurrently, can prevent the liquid magnesium alloy oxidation effectively, improves the metallurgical quality of magnesium alloy.And its obnoxious flavour that discharges helps the healthy of environment protection and operator well below national specified discharge standard.As document " development of novel non-pollution magnesium alloy flux " (Zhai Chunquan, Ding Wenjiang etc., Special Processes of Metal Castings and non-ferrous alloy, 1997, (4): 48-50).Although this flux has good residue eliminating performance, there is not tangible silica removal effect.
Summary of the invention:
The objective of the invention is to overcome the weak point of existing magnesium alloy flux, propose a kind of magnesium alloy silica removal flux and production method, the magnesium alloy silica removal flux that obtains in use can remove the gred again by silica removal, and cheap.
For achieving this end, magnesium alloy silica removal flux provided by the invention, its compositional range (mass percent) is: 15-30% magnesium chloride (MgCl
2), 15-30% Repone K (KCl), 10-20% Calcium Fluoride (Fluorspan) (CaF
2), 8-12% bariumchloride (BaCl
2), 10-25% magnesium fluoride (MgF
2), the fluorine zirconium potassium (K of 2-5%
2ZrF
6), the titanium compound of 10-20% and the carbonate of 1-10%.
The production method of this magnesium alloy silica removal flux is: after crucible is warmed up to certain temperature, add magnesium chloride, Repone K and bariumchloride, be warmed up to partial melting after, add Calcium Fluoride (Fluorspan), magnesium fluoride and fluorine zirconium potassium, be warmed up to 750-790 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with 20-40 number sieve.Add titanium compound and carbonate afterwards and mix with ball mill.The flux for preparing is packed into standby in the encloses container.
During use, when magnesium alloy melting in electrical crucible be warmed up to～740 ℃ the time, the silica removal flux with 3% constantly is spread on liquid level, stir up and down with the refining spoon simultaneously, make the magnesium liquid recycle stream moving,, keep usually that liquid level is till the bright mirror surface about 10 minutes to prolong the flow process of solvent droplets.
Magnesium alloy silica removal flux provided by the invention has significant silica removal effect, can effectively reduce the silicon amount in the magnesium alloy, thereby improves the mechanical property and the corrosion resistance nature of magnesium alloy.Simultaneously, flux activity of the present invention is stronger, and the molten intravital inclusion of magnesium is had extremely strong adsorptivity, can remove the molten intravital inclusion of magnesium effectively, has good residue eliminating performance, and cheap.Silica removal flux of the present invention and alloy liquid have bigger difference in specific gravity, and viscosity is suitable, and chemical stability is good, and are difficult for sneaking into alloy liquid, with alloy, furnace lining and furnace gas generation chemical reaction, do not produce flux and are mingled with, and can improve the refining effect of magnesium melt.Obnoxious flavour is less simultaneously, meets industrial hygiene standard and exhaust gas emission requirement.
Embodiment:
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
Magnesium alloy silica removal flux component (mass percent): 25% magnesium chloride, 20% Repone K, 20% Calcium Fluoride (Fluorspan), 8% bariumchloride, 10% magnesium fluoride, 2% fluorine zirconium potassium, 10% titanium chloride and 5% magnesiumcarbonate.
The production method of this magnesium alloy silica removal flux is: after crucible is warmed up to about 300 ℃, add magnesium chloride, Repone K and bariumchloride, be warmed up to partial melting after, add Calcium Fluoride (Fluorspan), magnesium fluoride and fluorine zirconium potassium, be warmed up to about 750 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with No. 20 sieves.Add titanium chloride and magnesiumcarbonate afterwards and mix with ball mill.The flux for preparing is packed into standby in the encloses container.
During use, when magnesium alloy melting in electrical crucible be warmed up to～740 ℃ the time, the silica removal flux with 3% constantly is spread on liquid level, stir up and down with the refining spoon simultaneously, make the magnesium liquid recycle stream moving,, keep usually that liquid level is till the bright mirror surface about 10 minutes to prolong the flow process of solvent droplets.Be used for magnesium alloy, its silicon amount can drop to below 0.01%.
Embodiment 2:
Magnesium alloy silica removal flux component (mass percent): 18% magnesium chloride, 15% Repone K, 10% Calcium Fluoride (Fluorspan), 12% bariumchloride, 25% magnesium fluoride, 3% fluorine zirconium potassium, 15% titanium dioxide and 2% lime carbonate.
The production method of this magnesium alloy silica removal flux is: after crucible is warmed up to about 350 ℃, add magnesium chloride, Repone K and bariumchloride, be warmed up to partial melting after, add Calcium Fluoride (Fluorspan), magnesium fluoride and fluorine zirconium potassium, be warmed up to 760 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with No. 40 sieves.Add titanium dioxide and lime carbonate afterwards and mix with ball mill.The flux for preparing is packed into standby in the encloses container.
During use, when magnesium alloy melting in electrical crucible be warmed up to～740 ℃ the time, the silica removal flux with 3% constantly is spread on liquid level, stir up and down with the refining spoon simultaneously, make the magnesium liquid recycle stream moving,, keep usually that liquid level is till the bright mirror surface about 10 minutes to prolong the flow process of solvent droplets.Be used for magnesium alloy, its silicon amount can drop to below 0.008%.
Embodiment 3:
Magnesium alloy silica removal flux component (mass percent): 25% magnesium chloride, 25% Repone K, 10% Calcium Fluoride (Fluorspan), 12% bariumchloride, 10% magnesium fluoride, 3% fluorine zirconium potassium, 10% titanium chloride and 5% lime carbonate.
The production method of this magnesium alloy silica removal flux is: after crucible is warmed up to about 350 ℃, add magnesium chloride, Repone K and bariumchloride, be warmed up to partial melting after, add Calcium Fluoride (Fluorspan), magnesium fluoride and fluorine zirconium potassium, be warmed up to 750 ℃, stir, pour into piece.The ball mill milling powdering of packing into after the fragmentation sieves with No. 20 sieves.Add titanium chloride and lime carbonate afterwards and mix with ball mill.The flux for preparing is packed into standby in the encloses container.
During use, when magnesium alloy melting in electrical crucible be warmed up to～740 ℃ the time, the silica removal flux with 3% constantly is spread on liquid level, stir up and down with the refining spoon simultaneously, make the magnesium liquid recycle stream moving,, keep usually that liquid level is till the bright mirror surface about 10 minutes to prolong the flow process of solvent droplets.Be used for magnesium alloy, its silicon amount can drop to below 0.01%.
Claims (4)
1, a kind of magnesium alloy silica removal flux is characterized in that the mass percent of component is: the fluorine zirconium potassium of 15-30% magnesium chloride, 15-30% Repone K, 10-20% Calcium Fluoride (Fluorspan), 8-12% bariumchloride, 10-25% magnesium fluoride, 2-5%, the titanium compound of 10-20% and the carbonate of 1-10%.
2, magnesium alloy silica removal flux as claimed in claim 1 is characterized in that titanium compound is titanium chloride, titanium dioxide.
3, magnesium alloy silica removal flux as claimed in claim 1 is characterized in that carbonate is magnesiumcarbonate, lime carbonate.
4, a kind of production method as claim 1,2,3 said magnesium alloy silica removal flux, it is characterized in that after the crucible intensification, add magnesium chloride, Repone K and bariumchloride, be warmed up to partial melting after, add Calcium Fluoride (Fluorspan), magnesium fluoride and fluorine zirconium potassium, be warmed up to 750-790 ℃, stir, pour into piece, the ball mill milling powdering of packing into after the fragmentation, the back of sieving adds titanium compound and carbonate and mixes with ball mill, and the flux for preparing is packed into standby in the encloses container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021453160A CN1151294C (en) | 2002-11-21 | 2002-11-21 | Magnesium alloy desilicon flux and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021453160A CN1151294C (en) | 2002-11-21 | 2002-11-21 | Magnesium alloy desilicon flux and production method |
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| Publication Number | Publication Date |
|---|---|
| CN1410567A true CN1410567A (en) | 2003-04-16 |
| CN1151294C CN1151294C (en) | 2004-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021453160A Expired - Fee Related CN1151294C (en) | 2002-11-21 | 2002-11-21 | Magnesium alloy desilicon flux and production method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605193A (en) * | 2012-03-21 | 2012-07-25 | 南昌大学 | Refining agent for copper and copper alloy smelting |
| CN103468976A (en) * | 2013-10-12 | 2013-12-25 | 青海三工镁业有限公司 | No-pollution green environment-friendly fluxing agent for magnesium and magnesium alloy and preparation method thereof |
| CN106086497A (en) * | 2016-06-28 | 2016-11-09 | 陈建峰 | A kind of method utilizing Ovum crusta Gallus domesticus carrier to prepare refining agent |
-
2002
- 2002-11-21 CN CNB021453160A patent/CN1151294C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605193A (en) * | 2012-03-21 | 2012-07-25 | 南昌大学 | Refining agent for copper and copper alloy smelting |
| CN103468976A (en) * | 2013-10-12 | 2013-12-25 | 青海三工镁业有限公司 | No-pollution green environment-friendly fluxing agent for magnesium and magnesium alloy and preparation method thereof |
| CN106086497A (en) * | 2016-06-28 | 2016-11-09 | 陈建峰 | A kind of method utilizing Ovum crusta Gallus domesticus carrier to prepare refining agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151294C (en) | 2004-05-26 |
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