CN101423909B - Refining agent for alloy and method for producing the same - Google Patents
Refining agent for alloy and method for producing the same Download PDFInfo
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- CN101423909B CN101423909B CN2008102395113A CN200810239511A CN101423909B CN 101423909 B CN101423909 B CN 101423909B CN 2008102395113 A CN2008102395113 A CN 2008102395113A CN 200810239511 A CN200810239511 A CN 200810239511A CN 101423909 B CN101423909 B CN 101423909B
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Abstract
The invention relates to an alloy refining agent, and belongs to the technical field of composition refining slag removing. Aiming at overcoming the defects existing in the prior refining agent sold in markets, by reasonable calculation, the invention provides the novel refining agent for aluminum alloy and low-magnesium aluminum alloy, which has simple components and low operative temperature. Tests show that compared with the refining agents at home and abroad, the alloy refining agent has the characteristics of good slag forming performance, good gas removing and impurity removing capability, simple component and low cost.
Description
Technical field
Involved in the present invention is a kind of aluminium and low magnalium refining agent, belongs to compound refining slagging-off technical field.
Background technology
Aluminium alloy in process of production, because entrained gas and the impurity of furnace charge itself, and aluminum alloy melt in melting, pass on etc. and to have absorbed gas in the process, can inevitably contain gas and inclusion in the aluminium liquid, this will make the mobile variation of alloy liquid, can make foundry goods produce multiple casting flaw after the cast, influence its mechanics and process industrial art performance and visual appearance, so must be before cast, it is carried out refining, purifying treatment, to get rid of these gases and inclusion, improve the quality of alloy liquid.Sprinkle a kind of measure that one deck refining agent promptly is refining, purifying treatment on alloy liquid surface.Because the liquid level of most of aluminium alloys has the oxide film of one deck densification, it can enter atmosphere by the serious hydrogen that hinders in the aluminium liquid, refining agent can make the dense oxidation film on aluminium liquid surface be broken for fine particle and have the effect that it is sucked the refining agent layer, and hydrogen molecule can enter atmosphere by this refining agent layer easily, and simultaneously the refining agent layer also has the effect that aluminium liquid contacts with steam in the atmosphere of isolating.On the other hand, refining agent also can adsorb and remove oxide inclusion in the aluminium liquid, has also removed the small bubbles that are adsorbed on the inclusion.
Before the present invention, the domestic refining agent that is used for aluminium and alloy refining mainly is by NaCl, KCl, MgCl
2, Na
2SiF
6, Na
2AlF
5, Na
2CO
3, drying such as NaF dewaters then that mechanically mixing forms, it still remains the solid granular mixture under use temperature, the slag making poor performance, form the aluminum content height, with the difficult isolating toughness slag of aluminium liquid, promptly form block slag after solidifying, increased the loss of aluminium in the fusion process, also be unfavorable for the discharge of hydrogen in the aluminium liquid, and complicated component has increased the cost of making.Though external refining agent slag making performance of producing is good, complicated component, cost is higher.
Summary of the invention
The present invention is the defective that overcomes above-mentioned refining agent, and through rationally calculating, the composition of arranging in pairs or groups out is simple, novel aluminum that operative temperature is lower and low magnalium refining agent.Through experimental examination, it is compared with domestic and international refining agent, and to have the slag making performance good, and degasification, removal of impurities ability are good, and composition is simple, the characteristics that cost is low.
Concrete making method of the present invention is:
1. with NaCl and Na
2SO
4℃ make solid A by 1: 2.85 Hybrid Heating to 820 of mass ratio, melt temperature is 623 ℃;
2. NaCl and KCl ℃ are made solid B by 1: 1.27 Hybrid Heating to 780 of mass ratio, melt temperature is 663 ℃;
3. with KCl and MgCl
2℃ make eutectic thing C by 1: 2.59 Hybrid Heating to 750 of mass ratio, melt temperature is about 426 ℃, or replaces with anhydrous carnallite;
4. with A, B, C and Na
2SiF
6By certain proportioning mixing and ball milling is that powder can make this refining agent, and it can melt at 660 ± 5 ℃ and is liquid state.Na wherein
2SiF
6Content between 16%-30%, the content of eutectic thing A is between 10%-15%, the content of sosoloid B is between 10%-15%, all the other are eutectic thing C, can adjust its content according to the difference of aluminium liquid impurities.
The wherein fused salt mixt of NaCl and KCl and Al
2O
3Deng the wetting angle between the oxide compound little (about 20 ℃), soak into, adhesive capacity is strong oxide inclusion in can well Al adsorption liquid.After in the sosoloid of NaCl and KCl, adding some villiaumites, as Na
2SiF
6, can significantly improve the affinability of refining agent.This is to generate fluorochemical and gasiform SiF because villiaumite can react under smelting temperature
4, AlF
3Deng, the former can improve the surface tension between refining agent and the alloy liquid, makes refining agent and alloy liquid separate easily, and quickens the process of inclusion in the refining agent absorption alloy liquid, reduces the loss that metal is caused because of the sticking folder of slag aluminium liquid; The latter can improve the ability of refining agent dissolved hydrogen, increases the degassing effect of refining agent.Na
2SO
4Can increase the adsorptive power of refining agent, also can make sustained release dosage and use impurity.The density of used each component of this refining agent all is not more than the density of aluminium liquid, will cover the surface of aluminium liquid after thawing, can not produce the danger that is mingled with, and can effectively stop the continuation oxidation of aluminium liquid.
This refining agent institute applicable scope is aluminium and low magnalium, and the content of Mg must be lower than 2% in the alloy, otherwise is easy to generate defective.
Table 1 has the system of eutectic point or solid solubility and minimum temperature
The table 2 aluminium alloy physicals of flux composition material
Embodiment is:
1. the refining agent prescription is: 10%A, 10%B, 64%C and 16%Na
2SiF
6
This refining agent, domestic refining agent and the external refining agent ratio in 3g/kg and 5g/kg is added respectively in the fine aluminium of thawing, and observe phenomena also collects that weighing is formed skims.After flux added, domestic refining agent melted and is spherical particle, and diffusion is not sprawled, and this refining agent and external refining agent then spread over aluminium liquid surface rapidly and form protective layer; Compare with all the other refining agents of equal add-on, the quantity of slag of taking off of this refining agent all is less than in addition both.Formed the skimming of domestic refining agent is the high toughness slag of aluminum content, and external refining agent is formed to be loose dryness slag, is mixed with small amount of aluminum liquid, and what this refining agent formed is loose dryness slag, does not contain aluminium liquid.Above-mentioned three kinds of aluminium liquid gained ingot castings all do not have macroscopic pin hole and exist after the mechanical polishing corrosion, do not have inclusion defect yet.In the Figure of description 1, (a) be depicted as add gained behind this refining agent do not have be mingled with, the microstructure picture of the aluminium alloy of free of pinholes, (b) be mingled with or the microstructure picture of the aluminium alloy of pin hole for existing.
2. the refining agent prescription is: 10%A, 13%B, 60%C and 17%Na
2SiF
6
This refining agent, domestic refining agent and the external refining agent ratio in 3g/kg and 5g/kg is added respectively in the A356 aluminium ingot of thawing, and observe phenomena also collects that weighing is formed skims, and the gained result is with 1. identical.Above-mentioned three kinds of aluminium liquid gained ingot castings all do not have macroscopic pin hole and exist after the mechanical polishing corrosion, do not have inclusion defect yet.
3. the refining agent prescription is: 11%A, 15%B, 55%C and 19%Na
2SiF
6
This refining agent, domestic refining agent and the external refining agent ratio in 3g/kg and 5g/kg is added respectively in the aluminium liquid that contains 80% A356 aluminium ingot and 20% A356 smear metal of thawing, and observe phenomena also collects that weighing is formed skims, and the gained result is with 1. identical.Above-mentioned three kinds of aluminium liquid gained ingot castings all do not have macroscopic pin hole and exist after the mechanical polishing corrosion, and domestic flux contains a small amount of inclusion defect.
4. the refining agent prescription is: 10%A, 10%B, 58%C and 22%Na
2SiF
6
This refining agent, domestic refining agent and the external refining agent ratio in 3g/kg and 5g/kg is added respectively in the aluminium liquid that contains 60% A356 aluminium ingot and 40% A356 smear metal of thawing, and observe phenomena also collects that weighing is formed skims, and the gained result is with 1. identical.Above-mentioned three kinds of aluminium liquid gained ingot castings all do not have macroscopic pin hole and exist after the mechanical polishing corrosion, and domestic refining agent contains a small amount of inclusion defect.
Embodiment is as shown in the table:
Description of drawings:
Accompanying drawing 1 is the microstructure picture of aluminium alloy, wherein: (a) be depicted as add gained behind this refining agent do not have be mingled with, the microstructure picture of the aluminium alloy of free of pinholes, (b) be mingled with or the microstructure picture of the aluminium alloy of pin hole for existing.
Claims (5)
1. aluminium and low magnalium refining agent is characterized in that NaCl and KCl ℃ are made solid A by 1: 2.85 Hybrid Heating to 820 of mass ratio, with NaCl and Na
2SO
4℃ make solid B by 1: 1.27 Hybrid Heating to 780 of mass ratio, with KCl and MgCl
2℃ make eutectic thing C by 1: 2.59 Hybrid Heating to 750 of mass ratio, again with A, B, C and Na
2SiF
6Mixing and ball milling is that powder forms according to a certain ratio, wherein in weight percent content: Na
2SiF
6Content between 16%-30%, the content of A is between 10%-15%, the content of B is between 10%-15%, all the other are eutectic thing C.
2. aluminium according to claim 1 and low magnalium refining agent are wherein in weight percent content: 10%A, 10%B, 64%C and 16%Na
2SiF
6
3. aluminium according to claim 1 and low magnalium refining agent is characterized in that in weight percent content: 10%A, 13%B, 60%C and 17%Na
2SiF
6
4. aluminium according to claim 1 and low magnalium refining agent is characterized in that in weight percent content: 11%A, 15%B, 55%C and 19%Na
2SiF
6
5. aluminium according to claim 1 and low magnalium refining agent are in weight percent content: 10%A, 10%B, 58%C and 22%Na
2SiF
6
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CN2008102395113A CN101423909B (en) | 2008-12-12 | 2008-12-12 | Refining agent for alloy and method for producing the same |
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CN2008102395113A CN101423909B (en) | 2008-12-12 | 2008-12-12 | Refining agent for alloy and method for producing the same |
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CN101423909A CN101423909A (en) | 2009-05-06 |
CN101423909B true CN101423909B (en) | 2010-06-09 |
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Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102127650A (en) * | 2010-10-11 | 2011-07-20 | 镇江市丹徒区振华熔剂厂 | Zinc alloy flux |
CN102312104A (en) * | 2011-10-14 | 2012-01-11 | 南南铝业股份有限公司 | Refining agent for aluminium and aluminium alloy melting |
CN103031456B (en) * | 2012-12-05 | 2015-06-24 | 安徽徽铝铝业有限公司 | Preparation method of refining agent for smelting high-purity aluminum alloy sectional material |
CN103014396B (en) * | 2012-12-05 | 2015-03-04 | 安徽徽铝铝业有限公司 | Preparation method of refining agent used for smelting aluminium alloy sections |
CN103266237B (en) * | 2013-06-07 | 2014-12-10 | 东南大学 | Deslagging smelting flux for smelting casting zinc alloy and preparation method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1073486A (en) * | 1991-12-16 | 1993-06-23 | 东北工学院 | The aluminum or aluminum alloy slag remover for refining |
CN1132257A (en) * | 1995-03-28 | 1996-10-02 | 张鑫珩 | Modified compounded molten solvent for refined Al-Al alloy |
US20040025632A1 (en) * | 2000-12-08 | 2004-02-12 | Sabin Boily | Grain refining agent for cast aluminum or magnesium products |
CN101157995A (en) * | 2007-11-09 | 2008-04-09 | 中国铝业股份有限公司 | Casting technique for aluminium or aluminium alloy |
-
2008
- 2008-12-12 CN CN2008102395113A patent/CN101423909B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1073486A (en) * | 1991-12-16 | 1993-06-23 | 东北工学院 | The aluminum or aluminum alloy slag remover for refining |
CN1132257A (en) * | 1995-03-28 | 1996-10-02 | 张鑫珩 | Modified compounded molten solvent for refined Al-Al alloy |
US20040025632A1 (en) * | 2000-12-08 | 2004-02-12 | Sabin Boily | Grain refining agent for cast aluminum or magnesium products |
CN101157995A (en) * | 2007-11-09 | 2008-04-09 | 中国铝业股份有限公司 | Casting technique for aluminium or aluminium alloy |
Non-Patent Citations (2)
Title |
---|
陈岁元等.铝及其合金组合精炼剂的引用研究.有色金属加工 146.1998,(146),10-12. |
陈岁元等.铝及其合金组合精炼剂的引用研究.有色金属加工 146.1998,(146),10-12. * |
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Inventor after: Ge Xueyuan Inventor after: Wang Miaohui Inventor after: Hou Jinshu Inventor before: Ge Xueyuan Inventor before: Wang Miaohui |
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Granted publication date: 20100609 Termination date: 20121212 |