CN103658579A - Device and method for continuously manufacturing high-quality alloy cast ingots - Google Patents

Device and method for continuously manufacturing high-quality alloy cast ingots Download PDF

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Publication number
CN103658579A
CN103658579A CN201210328413.3A CN201210328413A CN103658579A CN 103658579 A CN103658579 A CN 103658579A CN 201210328413 A CN201210328413 A CN 201210328413A CN 103658579 A CN103658579 A CN 103658579A
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cooling water
crystallizer
water chamber
primary cooling
alloy
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CN201210328413.3A
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CN103658579B (en
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白月龙
徐骏
张志峰
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Youyan metal composite technology Co.,Ltd.
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Beijing General Research Institute for Non Ferrous Metals
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Abstract

The invention discloses a device and method for continuously manufacturing high-quality alloy cast ingots, and belongs to the technical field of metal material machining. The device is composed of a hot top, a graphite ring and a crystallizer. The graphite ring is embedded into the crystallizer, a primary cooling water cavity and a secondary cooling water cavity are formed in the crystallizer, and a plurality of water outlets are formed in the water cavities. The angle A between the direction of the water outlet of the primary cooling water cavity and the radial projection of the primary cooling water cavity ranges from 60 degrees to 80 degrees. Through the device, steam films are formed between the surfaces of the cast ingots, the inner wall of the graphite ring and the inner wall of the crystallizer through water current, ejected by the water outlet, of the primary cooling water cavity. Under the effect of the steam films, the casting flaws of cold shut, segregation blocks and pull cracks of the cast ingots are avoided. The alloy cast ingots acquired through the method are smooth in surface, the casting flaws of segregation blocks, cold shut, macro crystal layers, surface cracks and the like are reduced, the yield and the material utilization rate of the cast ingots are increased, the environment is protected, the structure is simplified, and production cost of the cast ingots is lowered.

Description

The apparatus and method of the high-quality alloy cast ingot of a kind of continuous production
Technical field
The invention belongs to metal material processing technical field, be specifically related to the apparatus and method of the high-quality alloy cast ingot of a kind of continuous production.
Background technology
At present both at home and abroad in industrial production conventional ingot casting foundry engieering mainly contain following several, i.e. direct water-cooling foundry engieering (DC foundry engieering), the gentle cunning of hot direct casting technology for making (cunning) foundry engieering.
A kind of apparatus and method of producing ingot casting by direct water-cooling foundry engieering (DC foundry engieering) in United States Patent (USP) 2791812, have been mentioned; this technology is by the direct cooling effect of crystallizer wall; between molten aluminum liquid and crystallizer, form certain thickness solidified shell; under the protective effect of solidified shell, the motlten metal in solidified shell is drawn out under the effect of the external secondary cooling water of crystallizer and is frozen into ingot casting.Direct water-cooling foundry engieering production process is flexible, convenient, but because the liquid level in its crystallizer is difficult to control, in casting process, can form very dark liquid cave, in a cooling procedure, in crystallizer, the contraction of scull easily makes ingot casting surface produce various defects, as segregation knurl, cold shut, coarse-grain layer and face crack, especially the segregation of large scale ingot casting, decrepitation is quite serious, the adverse effect of bringing to Downstream processing operation in order to make up these defects, must strengthen turning amount and the ingot casting excision amount end to end of ingot casting, make like this yield rate of ingot casting greatly reduce, production cost significantly increases.In order to overcome these defects, developed hot direct casting technology for making abroad, if the Maxicast circle ingot casting identical-level hot-top casting technology of U.S. Wagstaff company invention is exactly the Typical Representative of hot direct casting technology for making, this technology is made a storage tank on crystallizer top with light heat insulation material and is connected with chute on the basis that makes full use of direct water-cooling foundry engieering advantage, more than in storage tank, melt is stabilized in liquidus temperature, there is not crystallization in melt, i.e. so-called " heat top " yet.The development of hot direct casting technology for making, effective crystal region height is diminished, and the effect of secondary direct water-cooling is strengthened, and has eliminated the illeffects of the air-gap of traditional DC method generation, ingot casting surface quality significantly improves, reduced the defects such as slag inclusion, pore, improved the inside quality of ingot casting, the crystalline structure of ingot casting is tiny evenly, segregation is little, improved the performance of ingot casting, simple to operate, production efficiency is high.But, no matter be direct water-cooling foundry engieering or hot direct casting technology for making, all that liquid metal first contacts after coagulation shaping with mold, this metal brings with contacting to casting of die wall the defect that is difficult to overcome, as metal forms space by the scull after-contraction of die wall chilling and die wall, cause scull intensity of cooling to reduce, the solidification of metal melt latent heat in scull discharges in a large number and makes scull remelting cause ingot casting to occur the casting flaws such as segregation knurl, crackle.Although therefore hot direct casting technology for making obtains improvement to a certain extent, because being difficult for accurate control, heat conduction distance still can produce the casting flaws such as distinctive segregation knurl, cold shut, coarse-grain layer and face crack.Ingot casting surface and internal soundness are not fundamentally improved.In order fundamentally to address the aforementioned drawbacks, invented sliding (cunning) foundry engieering of gas both at home and abroad, (Airslip) technology is made in the Pneumatic type thermal direct casting technology for making of mentioning as United States Patent (USP) 4157728 and the sliding hot direct casting of gas of U.S. Wagstaff company invention.This technology is used lubricating oil and compressed air to form a kind of oil/gas mixed lubrication medium between crystallizer inwall and melt in Hot-Top mould simultaneously, guarantee the stable of this medium simultaneously, pressure differential between balance itself and melt static pressure, the heat that this technology makes motlten metal pass through crystallizer wall reduces, greatly weakened the intensity of cooling of crystallizer wall, melt liquid cave shoals, ingot casting crystallization process is easy to feeding, be difficult for producing segregation, from crystallizer ingot casting out, be directly subject to the effect of secondary cooling water, greatly strengthened intensity of cooling, refinement ingot casting grain structure, and cooling point is near solid-liquid interface, so the ingot casting that Air-slip Casting is produced surface and internal soundness are fine.It is very responsive that but this technology requires to change to air pressure, needs accurately to control air pressure, in addition, porous graphite ring consumption is larger, and consuming cost is high, also very high to the requirement of foundry engieering, equipment is also comparatively complicated, is difficult for grasping, and has also greatly limited the scope of application of this technology.
Summary of the invention
The object of the present invention is to provide the apparatus and method of the high-quality alloy cast ingot of a kind of continuous production.
A device for the high-quality alloy cast ingot of continuous production, this device is comprised of heat top 1, graphite annulus 2 and crystallizer 4; In crystallizer 4, be embedded with graphite annulus 2, interior two primary cooling water chambeies 3 that communicate or do not communicate and the secondary cooling water chamber 5 of arranging of crystallizer 4; Primary cooling water chamber 3 sets out the mouth of a river 6; Secondary cooling water chamber 5 sets out the mouth of a river 7; The direction of the delivery port 6 in primary cooling water chamber 3 and its projection angle A are radially 60-88 degree, and wherein pressure and the flow of the cooling water in primary cooling water chamber 3 and secondary cooling water chamber 5 are controlled.
In vertical direction, the position of the delivery port 6 in primary cooling water chamber 3 is between graphite annulus 2 bottoms and the delivery port 7 in secondary cooling water chamber 5.
Said apparatus is suitable for the preparation of acieral, magnesium base alloy, zinc-containing alloy, acid bronze alloy, nickel-base alloy, cobalt-base alloys or ferrous alloy ingot casting.
A kind of method that adopts the high-quality alloy cast ingot of said apparatus continuous production, the cooling water that the method sprays by delivery port 6 by primary cooling water chamber 3 is ejected on the ingot casting 9 of high temperature, cooling water partial gasification, by the air gap 8 forming between ingot casting 9 and crystallizer 4 inwalls, enter the interior formation one deck of graphite annulus 2 aqueous vapor film 11, under the supporting role of this aqueous vapor film 11, melt 10 glides and contacts with secondary cooling water and be frozen into ingot casting 9 with the primary cooling water not yet gasifying.The large I of pressure of vapor membrane is controlled by pressure and the flow of cooling water in primary cooling water chamber 3.The existence of aqueous vapor film 11 has reduced melt 10 by the heat transfer of graphite annulus 2 radial direction, melt 10 conducts heat and mainly by the ingot casting 9 solidifying, carries out unidirectional heat transfer, component segregation or breach casting flaw that the scull remelting of having avoided melt 10 to bring due to a large amount of releases of latent heat of solidification causes.
Beneficial effect of the present invention is:
(1) compare with traditional hot direct casting technology for making, in the present invention, the pressure of aqueous vapor film can be adjusted by changing hydraulic pressure and the water yield of cooling water, to meet the pressure of aqueous vapor film, equal the suffered static pressure of melt, alloy melt is not directly contacted with graphite annulus inwall, simultaneously, after melt scull among the i.e. encirclement in cooling water, increased the intensity of cooling of ingot casting, the contraction that can greatly reduce scull in crystallizer makes the segregation knurl of ingot casting surface generation, cold shut, the casting flaws such as coarse-grain layer and face crack, thereby the high-quality alloy cast ingot that the smooth surface of obtaining and inherent quality are good.
(2) compare with sliding (cunning) foundry engieering of the gas adopting at present, the gas that the present invention directly adopts cooling water gasification to produce can be directly as lubricant medium.And without adopting oil gas lubricating system, reduced the consumption of lubricating oil and graphite annulus, also without being equipped with lubricant recovery device, protected environment, simplify the structure, reduced the production cost of ingot casting.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of the high-quality alloy cast ingot of preparation;
Fig. 2 is ingot casting primary cooling water apopore direction Yu Qi radially projecting angle schematic diagram while being billet;
Fig. 3 is ingot casting primary cooling water apopore direction Yu Qi radially projecting angle schematic diagram while being slab ingot;
Wherein each label is: 1-heat top, 2-graphite annulus, 3-primary cooling water chamber, 4-crystallizer, 5-secondary cooling water chamber, the delivery port in 6-primary cooling water chamber, the delivery port in 7-secondary cooling water chamber, 8-air gap, 9-ingot casting, melt-10,11-aqueous vapor film.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
This device is comprised of heat top 1, graphite annulus 2 and crystallizer 4 as shown in Figure 1; In crystallizer 4, be embedded with graphite annulus 2, interior two primary cooling water chambeies 3 that communicate or do not communicate and the secondary cooling water chamber 5 of arranging of crystallizer 4; Primary cooling water chamber 3 sets out the mouth of a river 6; Secondary cooling water chamber 5 sets out the mouth of a river 7; The direction of the delivery port 6 in primary cooling water chamber 3 and its projection angle A are radially 60-88 degree, as Figure 2-3.In vertical direction, the position of the delivery port 6 in primary cooling water chamber 3 is between graphite annulus 2 bottoms and the delivery port 7 in secondary cooling water chamber 5.
When preparing alloy cast ingot, the cooling water spraying by delivery port 6 by primary cooling water chamber 3 is ejected on the ingot casting 9 of high temperature, cooling water partial gasification, by the air gap 8 forming between ingot casting 9 and crystallizer 4 inwalls, enter the interior formation one deck of graphite annulus 2 aqueous vapor film 11, under the supporting role of this aqueous vapor film 11, melt 10 glides and contacts with secondary cooling water and be frozen into ingot casting 9 with the primary cooling water not yet gasifying.The large I of pressure of vapor membrane is controlled by pressure and the flow of cooling water in primary cooling water chamber 3.
Embodiment 1
Prepare high-quality 2024 aluminium alloy round cast ingot.As shown in Figure 1, this device is comprised of heat top 1, graphite annulus 2, crystallizer 4.Wherein, graphite annulus 2 is embedded in crystallizer 4.Graphite annulus internal diameter is 78mm, and graphite annulus thickness is 3mm.In crystallizer, include two cooling water cavities, be respectively primary cooling water chamber 3 and secondary cooling water chamber 5, pressure and the flow of the cooling water in primary cooling water chamber 3 and secondary cooling water chamber 5 can be controlled respectively.The radial angle A of primary cooling water chamber delivery port 6 water spraying directions and this delivery port 9 is 75 degree, as shown in Figure 2.
Adopt the device shown in Fig. 1, Fig. 2 to cast 2024 aluminium alloy round cast ingot continuously, 2024 aluminium alloy liquidus temperatures are 638 ℃, and in casting process, in heat top 1,2024 aluminium alloy melt temperature are 670 ℃.Ingot casting decrease speed is 3.5mm/s, and primary cooling water is pressed as 0.35MPa, and cooling water flow is 0.3L/s, and secondary cooling water pressure is 0.20MPa, and cooling water flow is 1.8L/s.Obtain ganoid 4032 aluminium alloy cast ingots.
Embodiment 2
Prepare high-quality AZ31 magnesium alloy circle ingot casting, as shown in Figure 1, this device is comprised of heat top 1, graphite annulus 2, crystallizer 4.Wherein, graphite annulus 2 is embedded in crystallizer 4.Graphite annulus internal diameter is 95mm, and graphite annulus thickness is 4mm.In crystallizer, include two cooling water cavities, be respectively primary cooling water chamber 3 and secondary cooling water chamber 5, pressure and the flow of the cooling water in primary cooling water chamber 3 and secondary cooling water chamber 5 can be controlled respectively.The radial angle A of primary cooling water chamber delivery port 6 water spraying directions and this delivery port 9 is 80 degree, as shown in Figure 2.
Adopt the device continuous casting AZ31 magnesium alloy circle ingot casting shown in Fig. 1, Fig. 2, AZ31 magnesium alloy liquidus temperature is 636 ℃, and in casting process, in heat top 1, AZ31 magnesium alloy fused mass temperature is 670 ℃.Ingot casting decrease speed is 4.0mm/s, and primary cooling water is pressed as 0.25MPa, and cooling water flow is 0.2L/s, and secondary cooling water pressure is 0.35MPa, and cooling water flow is 1.6L/s.Obtain ganoid AZ31 magnesium alloy ingot.

Claims (4)

1. a device for the high-quality alloy cast ingot of continuous production, is characterized in that, this device is comprised of heat top (1), graphite annulus (2) and crystallizer (4); In crystallizer (4), be embedded with graphite annulus (2), two primary cooling water chambeies (3) that communicate or do not communicate and secondary cooling water chamber (5) are set in crystallizer (4); Primary cooling water chamber (3) sets out the mouth of a river (6); Secondary cooling water chamber (5) sets out the mouth of a river (7); The direction of the delivery port (6) in primary cooling water chamber (3) and its projection angle A are radially 60-88 degree, and wherein pressure and the flow of the cooling water in primary cooling water chamber (3) and secondary cooling water chamber (5) are controlled.
2. the device of the high-quality alloy cast ingot of a kind of continuous production according to claim 1, it is characterized in that, in vertical direction, the position of the delivery port (6) of primary cooling water chamber (3) is positioned between graphite annulus (2) bottom and the delivery port (7) of secondary cooling water chamber (5).
3. according to right, want the device of the high-quality alloy cast ingot of a kind of continuous production described in 1, it is characterized in that, this device is applicable to the preparation of acieral, magnesium base alloy, zinc-containing alloy, acid bronze alloy, nickel-base alloy, cobalt-base alloys or ferrous alloy ingot casting.
4. one kind adopts the method for installing the high-quality alloy cast ingot of continuous production described in claim 1, it is characterized in that, by primary cooling water chamber (3), the cooling water by delivery port (6) ejection is ejected on the ingot casting (9) of high temperature the method, cooling water partial gasification, by the air gap (8) forming between ingot casting (9) and crystallizer (4) inwall, enter formation one deck aqueous vapor film (11) in graphite annulus (2), under the supporting role of aqueous vapor film (11), melt (10) glides and contacts with secondary cooling water and be frozen into ingot casting (9) with the primary cooling water not yet gasifying, the large I of pressure of vapor membrane is controlled by pressure and the flow of cooling water in primary cooling water chamber (3).
CN201210328413.3A 2012-09-06 2012-09-06 A kind of apparatus and method of continuous production high-quality alloy cast ingot Active CN103658579B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104525882A (en) * 2014-12-11 2015-04-22 西南铝业(集团)有限责任公司 Automatic oil lubricating crystallizer
CN105428276A (en) * 2015-11-11 2016-03-23 中国电子科技集团公司第四十八研究所 Indirect water cooling planetary transmission working stage
CN105522132A (en) * 2016-01-21 2016-04-27 东北大学 Triangular continuous casting slab preparation device and using method thereof
CN105772664A (en) * 2014-12-26 2016-07-20 北京有色金属研究总院 Gas-lubricated crystallizer device used for electromagnetic stirring and application method of gas-lubricated crystallizer device
CN108405821A (en) * 2018-04-03 2018-08-17 东北大学 The casting device and method of the big specification magnesium alloy slab ingot of flawless
CN112605354A (en) * 2020-11-26 2021-04-06 湖南文昌新材科技股份有限公司 Three-section cooling crystallizer for continuous casting
CN112808955A (en) * 2020-12-31 2021-05-18 湖南文昌新材科技股份有限公司 Casting crystallizer of high-silicon aluminum alloy semi-solid casting rod and preparation method thereof

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CN1994623A (en) * 2006-12-15 2007-07-11 清华大学深圳研究生院 Semi-continuous casting device and method for 7xxx aluminium
CN101168186A (en) * 2007-11-26 2008-04-30 苏州有色金属研究院有限公司 Continuous lubricating crystallizer for aluminum alloy semi-continuous casting
CN202824585U (en) * 2012-09-06 2013-03-27 北京有色金属研究总院 Device for continuously manufacturing high-quality alloy ingots

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EP0533133A1 (en) * 1991-09-19 1993-03-24 Ykk Corporation Cooling method of continuous casting and its mold
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104525882A (en) * 2014-12-11 2015-04-22 西南铝业(集团)有限责任公司 Automatic oil lubricating crystallizer
CN105772664A (en) * 2014-12-26 2016-07-20 北京有色金属研究总院 Gas-lubricated crystallizer device used for electromagnetic stirring and application method of gas-lubricated crystallizer device
CN105772664B (en) * 2014-12-26 2018-02-23 北京有色金属研究总院 A kind of gas lubricated crystallizer device and its application process for electromagnetic agitation
CN105428276A (en) * 2015-11-11 2016-03-23 中国电子科技集团公司第四十八研究所 Indirect water cooling planetary transmission working stage
CN105522132A (en) * 2016-01-21 2016-04-27 东北大学 Triangular continuous casting slab preparation device and using method thereof
CN108405821A (en) * 2018-04-03 2018-08-17 东北大学 The casting device and method of the big specification magnesium alloy slab ingot of flawless
CN112605354A (en) * 2020-11-26 2021-04-06 湖南文昌新材科技股份有限公司 Three-section cooling crystallizer for continuous casting
CN112808955A (en) * 2020-12-31 2021-05-18 湖南文昌新材科技股份有限公司 Casting crystallizer of high-silicon aluminum alloy semi-solid casting rod and preparation method thereof
CN112808955B (en) * 2020-12-31 2021-10-22 湖南文昌新材科技股份有限公司 Casting crystallizer of high-silicon aluminum alloy semi-solid casting rod and preparation method thereof

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