CN103614579B - Energy-saving and efficient aluminum alloy casting process - Google Patents
Energy-saving and efficient aluminum alloy casting process Download PDFInfo
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- CN103614579B CN103614579B CN201310672234.6A CN201310672234A CN103614579B CN 103614579 B CN103614579 B CN 103614579B CN 201310672234 A CN201310672234 A CN 201310672234A CN 103614579 B CN103614579 B CN 103614579B
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Abstract
The invention discloses an energy-saving and efficient aluminum alloy casting process. The casting process comprises steps of preparing a furnace charge, charging a furnace, smelting, adding an auxiliary material containing a magnesium ingot, stirring, refining for the first time, sampling and analyzing after slagging off, adjusting component, refining for the second time, sampling and analyzing after slagging off, covering and standing by, and casting and molding. The casting process is characterized in that in the step of charging the furnace, a hot-top casted and molded aluminum silicon bar is charged; the smelting step is performed at 710-730 DEG C; in the step of adding the auxiliary material containing the magnesium ingot, a manganese agent with purity of 75% is added; and the steps of refining for the first time and refining for the second time are performed at 690-710 DEG C. For the casting process, by adding the hot-top casted and molded aluminum silicon bar in the step of charging the furnace, so that the smelting temperature and refining temperature are lower than those of the traditional process, and the cast aluminum alloy product is uniform and fine in texture, excellent in quality and good in mechanical performance; meanwhile, the casting process is saved in energy and high in production efficiency; in addition, the addition of the manganese agent is favorable for improvement of mechanical performance of the aluminum alloy product.
Description
Technical field
The present invention relates to a kind of aluminum alloy melt casting technique, particularly relate to a kind of aluminum alloy melt casting technique.
Background technology
The melting of aluminum alloy melt casting and aluminium alloy and casting, wherein to the quality influence of aluminum alloy casting maximum be exactly melting technology.In traditional aluminum alloy melt casting technique, generally be added with the aluminium-silicon alloy ingot of swage cast, because the silicon phase constitution of aluminium-silicon alloy ingot is thicker, and there is uneven phenomenon in the distribution of composition, therefore, the ununiformity of not good and its composition of the refinement of the silicon phase of the aluminum alloy casting finally obtained, has a strong impact on the mechanical property of aluminum alloy casting, and generally do not add manganese in traditional technology, also cause the mechanical property of aluminum alloy materials not enough; The smelting temperature of traditional technology is 750-760 DEG C, and refining temperature is 730-740 DEG C, and energy consumption is comparatively large, and cost is higher, and production efficiency is on the low side.
Summary of the invention
Object of the present invention is just to provide a kind of aluminum alloy melt casting technique to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The technical process of aluminum alloy melt casting technique of the present invention is as follows: after sampling analysis → adjusting component → second time refining after auxiliary material → stirring → first time refining that furnace charge preparation → shove charge → melting → add comprises magnesium ingot → skim → skim, sampling analysis → covering leaves standstill → casting; In described shove charge flow process, load the aluminium silicon rod of heat top casting; In described smelter flowsheet, temperature is 710-730 DEG C; Described adding comprises in the auxiliary material flow process of magnesium ingot, also adds the manganese agent that purity is 75%; Described first time refining is with in second time refining flow process, and temperature is 690-710 DEG C.Owing to causing the interior tissue of the aluminium silicon rod of type evenly fine and closely woven through overheated direct casting, its metallurgical imperfection (as pore, slag inclusion and coarse-grain etc.) is well below swage cast ingot, and therefore, this kind of aluminium silicon rod quality is far superior to general swage casting product.So add in aluminium melting with such high-quality raw material, the excellent materials microstructure of primary aluminum silicon rod can be genetic in alloy product.The Main Function adding manganese agent improves intensity, refiner material recrystallize granularity.
Further, described in add and comprise in the auxiliary material flow process of magnesium ingot, the mass ratio adding manganese agent and aluminium liquid is 0.8 ﹕ 1000, adds fashionablely first evenly to be sprinkling upon in stove by manganese agent sled powdered.
Particularly, in described smelter flowsheet, temperature is 715-725 DEG C; Described first time refining is with in second time refining flow process, and temperature is 695-705 DEG C.
Beneficial effect of the present invention is:
The present invention owing to adding the aluminium silicon rod of heat top casting in loading furnace process, smelting temperature and refining temperature are all lower than traditional technology, generally will low 20-40 DEG C, the clarity of molten aluminium can be improved, the defect in foundry goods can be reduced again, improve the Melting Quality of material, the alloy product homogeneous microstructure of casting, refinement, superior in quality, good mechanical performance, and save energy, production efficiency is high; In addition, the mechanical property raising that manganese agent is also conducive to aluminum alloy casting is added.Adopt present invention process to obtain in the mechanical property of alloy product, tensile strength improves 42.6% than national standard required value, and extension strength improves 80.4%, and elongation after fracture improves 63.8%.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1:
Complete the founding of alloy product according to the following steps:
(1) furnace charge prepares;
(2) shove charge: the aluminium silicon rod loading heat top casting;
(3) melting: temperature remains on 715-725 DEG C;
(4) add auxiliary material: auxiliary material comprises magnesium ingot and manganese agent, the purity of wherein manganese agent is 75%, and the mass ratio adding manganese agent and aluminium liquid is 0.8 ﹕ 1000, adds fashionablely first evenly to be added in stove by manganese agent sled powdered spades;
(5) stir: repeatedly stir with trivet, make it melt completely;
(6) first time refining: maintenance temperature is 695-705 DEG C;
(7) sampling analysis after skimming: its component content of Main Analysis is specifically how many, is convenient to the component controlling product;
(8) adjusting component: throw in differing materials selectively according to analytical results, to adjust its component content;
(9) second time refining: maintenance temperature is 695-705 DEG C;
(10) sampling analysis after skimming: again analyze its component content specifically how many, analyze mainly for the purpose of safe specifically, generally speaking can meet the requirements, if also variant, need again to throw in differing materials to adjust each component content;
(11) covering leaves standstill: enter next step casting again after being cooled to suitable temp;
(12) casting.
Embodiment 2:
Complete the founding of alloy product according to the following steps:
(1) furnace charge prepares;
(2) shove charge: the aluminium silicon rod loading heat top casting;
(3) melting: temperature remains on 710-715 DEG C;
(4) add auxiliary material: auxiliary material comprises magnesium ingot and manganese agent, the purity of wherein manganese agent is 75%, and the mass ratio adding manganese agent and aluminium liquid is 0.8 ﹕ 1000, adds fashionablely first evenly to be added in stove by manganese agent sled powdered spades;
(5) stir: repeatedly stir with trivet, make it melt completely;
(6) first time refining: maintenance temperature is 690-695 DEG C;
(7) sampling analysis after skimming: its component content of Main Analysis is specifically how many, is convenient to the component controlling product;
(8) adjusting component: throw in differing materials selectively according to analytical results, to adjust its component content;
(9) second time refining: maintenance temperature is 690-695 DEG C;
(10) sampling analysis after skimming: again analyze its component content specifically how many, analyze mainly for the purpose of safe specifically, generally speaking can meet the requirements, if also variant, need again to throw in differing materials to adjust each component content;
(11) covering leaves standstill: enter next step casting again after being cooled to suitable temp;
(12) casting.
Embodiment 3:
Complete the founding of alloy product according to the following steps:
(1) furnace charge prepares;
(2) shove charge: the aluminium silicon rod loading heat top casting;
(3) melting: temperature remains on 725-730 DEG C;
(4) add auxiliary material: auxiliary material comprises magnesium ingot and manganese agent, the purity of wherein manganese agent is 75%, and the mass ratio adding manganese agent and aluminium liquid is 0.8 ﹕ 1000, adds fashionablely first evenly to be added in stove by manganese agent sled powdered spades;
(5) stir: repeatedly stir with trivet, make it melt completely;
(6) first time refining: maintenance temperature is 705-710 DEG C;
(7) sampling analysis after skimming: its component content of Main Analysis is specifically how many, is convenient to the component controlling product;
(8) adjusting component: throw in differing materials selectively according to analytical results, to adjust its component content;
(9) second time refining: maintenance temperature is 705-710 DEG C;
(10) sampling analysis after skimming: again analyze its component content specifically how many, analyze mainly for the purpose of safe specifically, generally speaking can meet the requirements, if also variant, need again to throw in differing materials to adjust each component content;
(11) covering leaves standstill: enter next step casting again after being cooled to suitable temp;
(12) casting.
The difference of above-mentioned three embodiments is only to adopt different smelting temperatures and refining temperature, last gained foundry goods
Performance is basically identical, is specially: Si content 0.36-0.38%; Mg content 0.54-0.58%; Mn content 0.03-0.05%, Fe content is less than 0.2%, and crystal grain refinement reaches one-level, and the tensile strength in its mechanical property improves 42.6% than national standard required value, and extension strength improves 80.4%, and elongation after fracture improves 63.8%.Belong to the superior prod in similar alloy product.Its concrete data are as shown in the table:
Present invention process and traditional technology are contrasted, obtain following result: traditional technology: every day produced maximum about 60 tons by every platform stove, and present invention process can produce 70-80 ton for one day, the time is corresponding shorten than in the past 2 little time/stove, production efficiency significantly improves.From save energy angle, present invention process compares traditional technology gas consumption decline 3-5m3 per ton, and the amount of money declines 17.81 yuan/T, falls 10.43%; Cost declines 57 yuan compared with last year, falls 13.56%; Power consumption declines 9.43 yuan compared with last year, declines 32.86%.
Claims (2)
1. an aluminum alloy melt casting technique, its technical process is as follows: furnace charge preparation → shove charge → melting → add
After sampling analysis → adjusting component → second time refining after comprising the auxiliary material → stirring → first time refining of magnesium ingot → skim → skim, sampling analysis → covering leaves standstill → casting; It is characterized in that: in described shove charge flow process, load the aluminium silicon rod of heat top casting; Described adding comprises in the auxiliary material flow process of magnesium ingot, also adds the manganese agent that purity is 75%; In described smelter flowsheet, temperature is 715-725 DEG C; Described first time refining is with in second time refining flow process, and temperature is 695-705 DEG C.
2., according to the aluminum alloy melt casting technique described in claim 1, it is characterized in that: described in add and comprise magnesium
In the auxiliary material flow process of ingot, the mass ratio adding manganese agent and aluminium liquid is 0.8 ︰ 1000, add fashionable first by manganese agent sled powdered be evenly sprinkling upon in stove.
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| CN101758206A (en) * | 2009-11-11 | 2010-06-30 | 苏州有色金属研究院有限公司 | Casting method capable of improving quality of aluminum and aluminum alloy ingots |
| WO2011158477A1 (en) * | 2010-06-14 | 2011-12-22 | 日本軽金属株式会社 | Process for production of aluminum alloy cast bar, continuous casting device, and electromagnetic stirring coil for continuous casting device |
| CN102925759A (en) * | 2011-08-09 | 2013-02-13 | 佛山市鸿金源铝业制品有限公司 | Aluminum alloy, preparation method and applications thereof |
| CN103243246A (en) * | 2013-05-24 | 2013-08-14 | 怡球金属资源再生（中国）股份有限公司 | High-quality and high-hardness aluminum alloy ingot and production method thereof |
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- 2013-12-12 CN CN201310672234.6A patent/CN103614579B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010012470A (en) * | 2008-06-30 | 2010-01-21 | Nippon Light Metal Co Ltd | CASTING METHOD OF HYPER-EUTECTIC Al-Si BASED ALLOY, AND INGOT THEREOF |
| CN101758206A (en) * | 2009-11-11 | 2010-06-30 | 苏州有色金属研究院有限公司 | Casting method capable of improving quality of aluminum and aluminum alloy ingots |
| WO2011158477A1 (en) * | 2010-06-14 | 2011-12-22 | 日本軽金属株式会社 | Process for production of aluminum alloy cast bar, continuous casting device, and electromagnetic stirring coil for continuous casting device |
| CN102925759A (en) * | 2011-08-09 | 2013-02-13 | 佛山市鸿金源铝业制品有限公司 | Aluminum alloy, preparation method and applications thereof |
| CN103243246A (en) * | 2013-05-24 | 2013-08-14 | 怡球金属资源再生（中国）股份有限公司 | High-quality and high-hardness aluminum alloy ingot and production method thereof |
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| Al-Si合金组织遗传性对6463铝合金含硅相的影响;刘一峥等;《有色金属科学与工程》;20130831;第4卷(第4期);摘要,第83页第3段,第84页第3段 * |
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