CN106702188A - Production method for improving comprehensive properties of AlSi12Fe aluminum alloy ingot - Google Patents
Production method for improving comprehensive properties of AlSi12Fe aluminum alloy ingot Download PDFInfo
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- CN106702188A CN106702188A CN201510407336.4A CN201510407336A CN106702188A CN 106702188 A CN106702188 A CN 106702188A CN 201510407336 A CN201510407336 A CN 201510407336A CN 106702188 A CN106702188 A CN 106702188A
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Abstract
The invention relates to the technical field of aluminum alloys, in particular to a production method for improving comprehensive properties of an AlSi12Fe aluminum alloy ingot. The production method comprises the following steps of: melting, slagging off, melting silicon, checking a fracture structure, cooling, deslagging, refining, adding a modificator, degassing, standing, and casting an ingot. According to multiple tests on comprehensive properties of the AlSi12Fe aluminum alloy ingot produced by the method, the tested results are superior to those of the AlSi12Fe aluminum alloy ingot produced by an existing production method.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology, more particularly to a kind of production method of lifting AlSi12Fe aluminium alloy ingots combination properties.
Background technology
AlSi12Fe is aluminium-Si system alloy in cast aluminium alloy gold, and the trade mark alloy has excellent casting character, has many uses general, such as, and vehicle wiper joint etc..Production technology in currently available technology to AlSi12Fe aluminium ingots is excessively simple, and production process becomes a mere formality, so product quality situation is accidentally preferable.
In the prior art, during the trade mark Product Process, the requirement that user uses could not be taken into full account so that many problems occurs in later stage die casting, wherein particularly importantly the performance of the trade mark alloy cannot meet the high request of different user, limits application extension.
According to existing production method produce the operation of AlSi12Fe aluminium alloy ingots, easy mold release, needle-like silicon tissue be not thick for product, and die casting product combination property is unable to reach and meets the further quality requirement of die casting user.
The content of the invention
The purpose of the present invention is the combination property for lifting AlSi12Fe aluminium alloy ingots, to solve drawbacks described above of the prior art.
To realize object above, the invention provides a kind of production method of lifting AlSi12Fe aluminium alloy ingots combination properties, the production method includes throwing the whole process that stove is melted to casting ingot from aluminium material.
Concrete technical scheme of the invention is：
A kind of production method of lifting AlSi12Fe aluminium alloy ingots combination properties, step is as follows：
（1）To carry out fluxing in the wrought aluminium of mass percent 40%, alloy, and 40% A00 aluminium ingots input smelting furnace, a length of 5-7 hours during total fusing, melt temperature is controlled to 630-740 DEG C；
（2）Skim：15-20KG slag-cleaning agents are sprinkled in aluminum alloy melt surface with spade, is skimmed after gently beaing liquid level 5-10 minutes with trivet, and aluminium slag is cleared out into fire door, it is impossible to stir aluminium liquid with trivet；
（3）Molten silicon：Metallic silicon is added when aluminium liquid surface is without scum silica frost, is sufficiently stirred for aluminium liquid 3-5 minutes with trivet after addition, heating of then opening fire is stirred for 3-5 minutes for 10-15 minutes, repeats 4-6 times；
（4）Molten silicon terminates, and final temperature reaches 760-780 DEG C manually after the cooling of casting aluminium ingot one, saws a small otch, interrupts inspection fractograph, during when fracture is fine and close, without substantially siliceous, should otherwise continue to stir, aluminium ingot of casting, inspection, until reaching requirement.
（5）Cooling：Plus the temperature of molten silicon is dropped to 710-730 DEG C of the temperature that refining is required by the adjustment material that QC is issued, if the low intensification that should open fire of temperature；Plus it can also be once multiple that cooling material can be, determine according to aluminium liquid composition in stove, but to ensure that aluminium material is clean, definite ingredients；Later stage such as need on a small quantity be added silicon, iron and should be added in the form of intermediate alloy；
（6）Slagging-off：Add after adjustment material according to aluminium liquid surface scum number determine the input amount of slag-cleaning agent, scope is in 10-15 ㎏；Skimmed after beaing liquid level 5-10 minutes with trivet, and aluminium slag is cleared out into fire door, it is impossible to stir aluminium liquid with trivet；
（7）Refining：It is divided into twice, refines for the first time：Temperature of aluminum liquid is controlled to 720 ± 10 DEG C；Refining time was controlled at 20 minutes；Skim Shi Jian≤15 minute；Refining agent quantity is controlled to 1.4-1.7KG/ tons.Refine for second：Temperature of aluminum liquid is controlled to 720 ± 10 DEG C；Refining time was controlled at 20 minutes；Skim Shi Jian≤15 minute；Refining agent quantity is controlled to 1.1-1.3KG/ tons；
（8）Add alterant：After refining terminates, add alterant to be gone bad, silicon is mutually refined, alterant scope control is 1-1.5KG/ tons.
（9）Degasification：Degasification time control is 20-30 minutes, and temperature control is 700-710 DEG C, and degasification terminates casting aluminium ingot carries out detection grain size, and aluminium ingot fracture grain size enters next process after being better than being equal to 2 grades；Scum silica frost should be focused on fire door trivet and taken off totally by degassing procedure before degasification terminates when having scum silica frost by degasification；
（10）The refining of melting workshop section, degasification method：Will be during refining pipe bend extends downwardly into aluminium water, nitrogen valve is opened simultaneously, nitrogen output pressure is adjusted to 0.2Mpa, first by it is left-to-right or by the right side to it is left longitudinal direction refine, degasification, secondly from the inside to the outside or by outside to inside laterally refining, degasification, " well " font is formed to reach to be stirred in furnace inner space, is persistently stopped not in certain position；
（11）Stand：Time of repose 15-20 minutes, 700-720 DEG C of dwell temperature；The oxide-film that aluminium liquid can not be stirred during standing to protect aluminium liquid surface to be formed；
（12）Ingot casting.
Further, above-mentioned steps（3）Molten silicon step, is to add metallic silicon when without scum silica frost；Wen Du≤720 DEG C during addition；Aluminium liquid was stirred at interval of 10-15 minutes 3-5 minutes；Cease fire during stirring；It is heated up to stop heating at 760-780 DEG C；Generally entirely molten silicon time control is 60-90 minutes, it may be necessary to increased to 120 minutes；Silicon, the addition of iron want the abundance to prevent the later stage from adding on a small quantity.
Further, above-mentioned steps（10）Refining, degassing procedure all the time will maintain a certain distance refining pipe bent-up end mouthful with furnace bottom, generally remain in apart from the height of furnace bottom 1/4；Translational speed will be at the uniform velocity when each refining, degasification in length and breadth；Gao Du≤the 15CM that control aluminium liquid to splash during degasification.
The beneficial effects of the invention are as follows：
1st, through test of many times, testing result is superior to existing production method to the AlSi12Fe aluminium alloy ingots combination property of the inventive method production.
2nd, the AlSi12Fe aluminium alloy ingots produced using the inventive method is caused, after die casting is carried out, the not easy mold release phenomenon of product is reduced, and product recrystallized structure becomes big phenomenon and well improved.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention, rather than limit protection scope of the present invention.The modifications and adaptations that technical staff makes according to the present invention in actual applications, still fall within protection scope of the present invention.
Embodiment is listed below, to illustrate the present invention.
A kind of AlSi12Fe aluminium alloy ingots, its composition is expressed as with mass fraction：
Si:11.9%、Fe:0.66%、Cu:0.03%、Mn:0.21%、Mg:0.03%、Cr:0.003%、Ni:0.005%、Zn:0.01%、Ti:0.02%、Pb:0.002%。
4th, the manufacturing process of the lifting AlSi12Fe aluminium alloy ingots combination properties is as follows：
The alloying component in addition to aluminum, mainly contains the composition of following percentage by weight：
（1）To carry out fluxing in the wrought aluminium of mass percent 40%, alloy, and 40% A00 aluminium ingots input smelting furnace, a length of 7 hours during total fusing, melt temperature is controlled to 725 DEG C；
（2）Skim：20KG slag-cleaning agents are sprinkled in aluminum alloy melt surface with spade, liquid level is gently beaten with trivet and is skimmed after 10 minutes, and aluminium slag is cleared out into fire door；
（3）Molten silicon：Metallic silicon is added when aluminium liquid surface is without scum silica frost, aluminium liquid is sufficiently stirred for 5 minutes with trivet after addition, heating of then opening fire is stirred for 5 minutes for 15 minutes, is repeated 6 times；
（4）Molten silicon terminates, and after final temperature reaches 773 DEG C of manual one coolings of casting aluminium ingots, saws a small otch, interrupts inspection fractograph, and fracture is fine and close, the obvious siliceous point of nothing meets the requirements.
（5）Cooling：Plus the temperature of molten silicon is dropped to 721 DEG C of the temperature that refining is required by the adjustment material that QC is issued；
（6）Slagging-off：The ㎏ of slag-cleaning agent 15 is put into according to aluminium liquid surface scum after adding adjustment material（Slag-cleaning agent is produced by upper marine rainbow light metal solvent factory, model HGJ-3）；Skimmed after beaing liquid level 10 minutes with trivet, and aluminium slag is cleared out into fire door；
（7）Refining：It is divided into twice, refines for the first time：Temperature of aluminum liquid is 721 DEG C；Refining time is 20 minutes；Slag-removing time is 15 minutes；Refining agent quantity is 30KG.Refine for second：Temperature of aluminum liquid is 718 DEG C；Refining time is 20 minutes；Slag-removing time is 15 minutes；Refining agent quantity is 24KG；（Refining agent is produced by upper marine rainbow light metal solvent factory, model HGK5-1A）
（8）Add alterant：After refining terminates, alterant is added to be gone bad, alterant quantity is 17KG.（Alterant is produced by Jie Ya metallurgical applications Technology Co., Ltd. of Zhangjagang City, entitled al-sr alloy）
（9）Degasification：The degasification time is 30 minutes, and temperature control is 715 DEG C, and degasification terminates casting aluminium ingot carries out detection grain size, and aluminium ingot fracture grain size is 1 grade；
（10）Stand：Time of repose 20 minutes, 710 DEG C of dwell temperature；
（11）Ingot casting.
1 、Cleaning chute, mould：1. cleaned out with the aluminium material on hook holder chute first；Secondly the exotic material and other debris that loosen are cleaned out with hairbrush.Gently purged totally with tracheae after cleaning, touched with hand, confirm free from dust on hand；2. mold cleaning：The aluminium material of adhesion is cleaned out with small crooked chisel, then purges mould, brush mould wash, abundant baking dies before casting with tracheae.2 、Brush talcum powder：Talcum powder presses 1 with pure water：After 4 ratio reconciles uniformly, it is evenly coated on chute with hairbrush, is waited 18 minutes, silicic acid paper cap above chute, the lower section sectional baking of small fire, until each section of moisture content drying.3 、Polishing, cleaning（For chute）：After drying, place that is with sand paper that chute is uneven, raised or loosening gently is ground off, and is allowed to smooth；After the completion of polishing everywhere, then gently the talcum powder for polishing off is cleaned out with hairbrush, finally gently purged with tracheae clean.4 、Distribution drum is cleared up, is purged；5 、Ingot mould is cleared up, is purged, swabbing, baking；6 、Rolling inspection to ingot casting line and folded ingot machine（Drum containing distribution, mould, operation is once）；7 、Cooling water is checked；8 、The preparation of the operation instruments such as mine lamp, chock plug, plug sleeve, silicic acid paper, spades is checked before casting.9 、Casting process：Cast temperature is 704 DEG C in stove, distributes 681 DEG C of drum, places screen pack, and ingot casting speed is 12m/min.10th, preparation before 1. casting workshop section personnel start ingot casting when refining for second；2. make grain size detection before, during and after ingot casting respectively, grain size testing result is respectively one-level, one-level, two grades.
Shown in following table：
By controlling the content of ferro element, product is set to be easier to the demoulding in die casting；By rotten using strontium to eutectic Si system alloy, silicon is mutually refined, improve the mechanical property of product.
Claims (4)
1. a kind of production method of lifting AlSi12Fe aluminium alloy ingots combination properties, step is as follows：
（1）To carry out fluxing in the wrought aluminium of mass percent 40%, alloy, and 40% A00 aluminium ingots input smelting furnace, a length of 5-7 hours during total fusing, melt temperature is controlled to 630-740 DEG C；
（2）Skim：15-20KG slag-cleaning agents are sprinkled in aluminum alloy melt surface with spade, is skimmed after beaing liquid level 5-10 minutes with trivet, and aluminium slag is cleared out into fire door, it is impossible to stir aluminium liquid with trivet；
（3）Molten silicon：Metallic silicon is added when aluminium liquid surface is without scum silica frost, is sufficiently stirred for aluminium liquid 3-5 minutes with trivet after addition, heating of then opening fire is stirred for 3-5 minutes for 10-15 minutes, repeats 4-6 times；
（4）Molten silicon terminates, and final temperature reaches 760-780 DEG C manually after the cooling of casting aluminium ingot one, saws a small otch, interrupts inspection fractograph, during when fracture is fine and close, without substantially siliceous, should otherwise continue to stir, aluminium ingot of casting, inspection, until reaching requirement；
（5）Cooling：Plus the temperature of molten silicon is dropped to 710-730 DEG C of the temperature that refining is required by the adjustment material that QC is issued；
（6）Slagging-off：Add after adjustment material according to aluminium liquid surface scum number determine the input amount of slag-cleaning agent, scope is in 10-15 ㎏；Skimmed after beaing liquid level 5-10 minutes with trivet, and aluminium slag is cleared out into fire door, it is impossible to stir aluminium liquid with trivet；
（7）Refining：It is divided into twice, refines for the first time：Temperature of aluminum liquid is controlled to 720 ± 10 DEG C；Refining time was controlled at 20 minutes；Skim Shi Jian≤15 minute；Refining agent quantity is controlled to 1.4-1.7KG/ tons；
Refine for second：Temperature of aluminum liquid is controlled to 720 ± 10 DEG C；Refining time was controlled at 20 minutes；Skim Shi Jian≤15 minute；Refining agent quantity is controlled to 1.1-1.3KG/ tons；
（8）Add alterant：After refining terminates, add alterant to be gone bad, silicon is mutually refined, alterant scope control is 1-1.5KG/ tons；
（9）Degasification：Degasification time control is 20-30 minutes, and temperature control is 700-710 DEG C, and degasification terminates casting aluminium ingot carries out detection grain size, and aluminium ingot fracture grain size enters next process after being better than being equal to 2 grades；Scum silica frost should be focused on fire door trivet and taken off totally by degassing procedure before degasification terminates when having scum silica frost by degasification；
（10）The refining of melting workshop section, degasification method：Will be during refining pipe bend extends downwardly into aluminium water, nitrogen valve is opened simultaneously, nitrogen output pressure is adjusted to 0.2Mpa, first by it is left-to-right or by the right side to it is left longitudinal direction refine, degasification, secondly from the inside to the outside or by outside to inside laterally refining, degasification, " well " font is formed to reach to be stirred in furnace inner space, is persistently stopped not in certain position；
（11）Stand：Time of repose 15-20 minutes, 700-720 DEG C of dwell temperature；The oxide-film that aluminium liquid can not be stirred during standing to protect aluminium liquid surface to be formed；
（12）Ingot casting.
2. a kind of production method of lifting AlSi12Fe aluminium alloy ingots combination properties according to claim 1, it is characterised in that the step（3）Molten silicon step, is to add metallic silicon when without scum silica frost；Wen Du≤720 DEG C during addition；Aluminium liquid was stirred at interval of 10-15 minutes 3-5 minutes；Cease fire during stirring；It is heated up to stop heating at 760-780 DEG C；Generally entirely molten silicon time control is 60-120 minutes；Silicon, the addition of iron want the abundance to prevent the later stage from adding on a small quantity.
3. the production method of a kind of lifting AlSi12Fe aluminium alloy ingots combination properties according to claim 2, it is characterised in that the entirely molten silicon time control is 60-90 minutes.
4. a kind of production method of lifting AlSi12Fe aluminium alloy ingots combination properties according to claim 1, it is characterised in that the step（10）Refining, degassing procedure all the time will maintain a certain distance refining pipe bent-up end mouthful with furnace bottom, generally remain in apart from the height of furnace bottom 1/4；Translational speed will be at the uniform velocity when each refining, degasification in length and breadth；Gao Du≤the 15CM that control aluminium liquid to splash during degasification.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107937767A (en) * | 2017-12-28 | 2018-04-20 | 苏州仓松金属制品有限公司 | A kind of novel high-performance aluminum alloy materials and preparation method thereof |
| CN109097611A (en) * | 2018-08-24 | 2018-12-28 | 海门市沪海有色铸造有限公司 | A kind of aluminum melting process |
| CN110016578A (en) * | 2019-03-01 | 2019-07-16 | 江苏美多汽车配件有限公司 | A kind of aluminum melting technique for thermostat cover |
| CN115595475A (en) * | 2022-10-21 | 2023-01-13 | 无锡贺邦金属制品有限公司（Cn） | Preparation method of die-casting aluminum alloy with improved yield strength |
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Cited By (5)
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| CN110016578A (en) * | 2019-03-01 | 2019-07-16 | 江苏美多汽车配件有限公司 | A kind of aluminum melting technique for thermostat cover |
| CN115595475A (en) * | 2022-10-21 | 2023-01-13 | 无锡贺邦金属制品有限公司（Cn） | Preparation method of die-casting aluminum alloy with improved yield strength |
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Address after: 201514 699 Zhen Yan Road, Zhang Yan Town, Jinshan District, Shanghai Patentee after: Shuai wing Chi New Material Group Co., Ltd. Address before: 201514 699 Zhen Yan Road, Zhang Yan Town, Jinshan District, Shanghai Patentee before: Shanghai Shuaiyichi Aluminum Alloy New Material Co., Ltd. |
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