CN101343699A - Aluminum-silicon alloy refining agent and preparation thereof - Google Patents
Aluminum-silicon alloy refining agent and preparation thereof Download PDFInfo
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- CN101343699A CN101343699A CNA2008100131178A CN200810013117A CN101343699A CN 101343699 A CN101343699 A CN 101343699A CN A2008100131178 A CNA2008100131178 A CN A2008100131178A CN 200810013117 A CN200810013117 A CN 200810013117A CN 101343699 A CN101343699 A CN 101343699A
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Abstract
Disclosed is an aluminum silicon alloy refining agent and a manufacturing method thereof, belonging to the research and development field of the aluminum silicon alloy refining agent. The aluminum silicon alloy refining agent is prepared by potassium chloride, sodium chloride, zinc chloride, sodium fluoaluminate, sodium fluosilicate, sodium nitrate, graphite powder, charcoal powder, hexachoroethane, sodium fluoborate and potassium fluotitanate. The materials are mixed, smashed and pressed into blocks to prepare the aluminum silicon alloy refining agent. The invention adopts the using method of the manufactured refining agent: when the temperature of the melted aluminum alloy fluid reaches 720 to 760 DEG C, the refining agent blocks are put into a melting pot to perform the reaction. The reaction time is 10 to 25 minutes. The floating slag is removed, and then the product is cast. The method of the product is simple, the implementation is easy, and when the refining agent manufactured by the method is used for casting aluminum silicon alloy, air holes can not be formed on the cast product surface, the content of oxide inclusions in the cast product is obviously reduced, and the cast product quality is greatly improved. The air holes can be reduced by one to two grades. The level of the oxide inclusions is at about the second grade. The invention solves the problem that the existing refining agent and the processing method are not ideal.
Description
Technical field
The invention belongs to the research and development field of aluminum-silicon alloy refining agent.
Background technology
In the castingprocesses of aluminum silicon alloy cast member, earlier with the aluminum silicon alloy fusion, owing to be fusion at normal temperatures and pressures, liquation absorbs airborne moisture content, produces oxidation, makes the liquation downgrade at present.Particularly after casting, because the bubble in the liquation rises, cause cast(ing) surface being mingled with of pore and foundry goods inner oxide to occur in the liquation process of setting, make that casting quality can not get guaranteeing, even scrap.And the existing way that addresses these problems has: rare gas element purifying method, the inert gas of promptly jetting in the alloy liquation in melting process.Because inert gas can not with aluminium generation chemical reaction.Along with inert gas rises, bubble and oxide inclusion are carried under one's arms out.Also have plenty of the hexachloroethane of employing and carry out refining, generate aluminum chloride and hydrogen chloride gas with reactive aluminum in treating processes, bubble hydrogen and oxide inclusion when gas rises in the absorption aluminum alloy melt are got rid of then.The employing villiaumite that also has is as refining agent, and villiaumite can improve the surface tension between flux and the alloy liquid, and flux and alloy liquid are separated easily, the process of hydrogen and oxide inclusion in the acceleration flux absorption alloy liquid.But see that in practice above several method is all undesirable.Be difficult to reach the product technology standard-required.The refining agent of also identical with the present invention at present refining agent and the manufacturing of employing present method is used in production reality.
Summary of the invention
The purpose of this invention is to provide a kind of aluminum-silicon alloy refining agent and manufacture method thereof.Be applied to the aluminum silicon alloy casting, to solve the practical problems that existing refining agent exists in treating processes.To improve the quality of foundry goods.
The present invention is achieved by following technical solution; Refining agent is formulated by Repone K, sodium-chlor, zinc chloride, sodium fluoroaluminate, Sodium Silicofluoride, SODIUMNITRATE, Graphite Powder 99, wooden carbon dust, hexachloroethane, Sodium tetrafluoroborate, potassium fluotitanate.Its proportion of raw materials is: Repone K is 15～30 sodium-chlor 15～30%, zinc chloride 2～8%, sodium fluoroaluminate 2～8%, Sodium Silicofluoride 2～8%, SODIUMNITRATE 5～15%, Graphite Powder 99 0.5～2%, wooden carbon dust 1～10%, hexachloroethane 5～15%, Sodium tetrafluoroborate 1～10%, potassium fluotitanate 1～10%.More than the ratio that adopts in the prescription is weight percentage.
Its manufacture method is: pressing Repone K, sodium-chlor, zinc chloride, sodium fluoroaluminate, Sodium Silicofluoride, SODIUMNITRATE, Graphite Powder 99, hexachloroethane, Sodium tetrafluoroborate, potassium fluotitanate separately, mixed stirs, pulverize then, the granularity of pulverizing the back compound is 80～100 orders.And then wooden carbon dust is broken into powder, its granularity is 10～20 orders.Then wooden carbon dust is joined in the batch mixing in proportion, continue stirring and make its uniform mixing.With mixed compound briquetting, piece weighs 0.25～0.5 kilogram, and density is 180～250Kg/m
3Again with mixture block after toasting 8～12 hours under 220～260 ℃ of temperature, put into drying receptacle and seal up for safekeeping.Promptly make refining agent.
The using method of refining agent is, when molten aluminium alloy is 720～760 ℃, the refining agent piece put in the crucible, reacts.The input ratio of refining agent is 0.5～1.0% of a molten aluminium alloy.Reaction times is 10～25 minutes.Static then 3～5 minutes, more floating slag is removed the product of casting then.
This method for product is simple, and is easy to implement, and the refining agent that adopts present method to produce is used for the casting of aluminum silicon alloy, can not produce pore at cast(ing) surface, and the content of oxide inclusion significantly reduces in the foundry goods, increases substantially casting quality.Degree of porosity can be reduced to 1～2 grade.Oxide inclusion is about 2 grades.Existing refining agent of contrast and treatment process have significant positively effect.
The present invention does not have accompanying drawing
Embodiment 1
Repone K is 20%, sodium-chlor 20%, zinc chloride 6%, sodium fluoroaluminate 6%, Sodium Silicofluoride 6%, SODIUMNITRATE 15%, Graphite Powder 99 1%, hexachloroethane 10%, Sodium tetrafluoroborate 7%, potassium fluotitanate 7%.Above material is mixed, stir, adopt palate formula pulverizer that compound is pulverized again.Raw meal particle size after the pulverizing is 90 orders.Again 2% wooden carbon dust is broken to 15 orders.Then wooden carbon dust is mixed with mixture.Continue to stir, it is mixed.With mixed compound briquetting on oil press, piece weighs 0.25 kilogram, and density is 180kg/m
3Again mixture block is put into drying receptacle and sealed up for safekeeping after 8 hours in baking under 220 ℃ of temperature.Promptly make refining agent.
Embodiment 2
Repone K is 22%, sodium-chlor 22%, zinc chloride 5%, sodium fluoroaluminate 5%, Sodium Silicofluoride 5%, SODIUMNITRATE 15%, Graphite Powder 99 2%, hexachloroethane 11%, Sodium tetrafluoroborate 4%, potassium fluotitanate 4%.Above material is mixed, stir, adopt palate formula pulverizer to pulverize again.Raw meal particle size after the pulverizing is 80 orders.Again 5% wooden carbon dust is broken to 15 orders.Then wooden carbon dust is mixed with mixture.Continue to stir, it is mixed.With mixed compound briquetting on oil press, piece weighs 0.25 kilogram, and density is 180kg/m
3Again mixture block is put into drying receptacle and sealed up for safekeeping after 7 hours in baking under 240 ℃ of temperature.Promptly make refining agent.
Claims (2)
1, a kind of aluminum-silicon alloy refining agent, it is characterized in that: formulated by Repone K, sodium-chlor, zinc chloride, sodium fluoroaluminate, Sodium Silicofluoride, SODIUMNITRATE, Graphite Powder 99, wooden carbon dust, hexachloroethane, Sodium tetrafluoroborate, potassium fluotitanate, its proportion of raw materials is: Repone K is 15～30 sodium-chlor 15～30%, zinc chloride 2～8%, sodium fluoroaluminate 2～8%, Sodium Silicofluoride 2～8%, SODIUMNITRATE 5～15%, Graphite Powder 99 0.5～2%, wooden carbon dust 1～10%, hexachloroethane 5～15%, Sodium tetrafluoroborate 1～10%, potassium fluotitanate 1～10%.
2, a kind of manufacture method of aluminum-silicon alloy refining agent, it is characterized in that: pressing Repone K, sodium-chlor, zinc chloride, sodium fluoroaluminate, Sodium Silicofluoride, SODIUMNITRATE, Graphite Powder 99, hexachloroethane, Sodium tetrafluoroborate, potassium fluotitanate separately, mixed stirs, pulverize then, the granularity of pulverizing the back compound is 80～100 orders, and then wooden carbon dust is broken into powder, its granularity is 10～20 orders, join wooden carbon dust in the batch mixing in proportion then, continue to stir and make its uniform mixing, with mixed compound briquetting, its density is 180～250Kg/m
3, again mixture block was toasted 8～12 hours under 220～260 ℃ of temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100131178A CN101343699B (en) | 2008-09-03 | 2008-09-03 | Aluminum-silicon alloy refining agent and preparation thereof |
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| CN2008100131178A CN101343699B (en) | 2008-09-03 | 2008-09-03 | Aluminum-silicon alloy refining agent and preparation thereof |
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| CN101343699A true CN101343699A (en) | 2009-01-14 |
| CN101343699B CN101343699B (en) | 2010-06-16 |
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| CN101343699B (en) | 2010-06-16 |
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