CN103978170A - Semi-continuous casting crystallizer for aluminum alloy near net shape cast ingot - Google Patents
Semi-continuous casting crystallizer for aluminum alloy near net shape cast ingot Download PDFInfo
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- CN103978170A CN103978170A CN201410179871.4A CN201410179871A CN103978170A CN 103978170 A CN103978170 A CN 103978170A CN 201410179871 A CN201410179871 A CN 201410179871A CN 103978170 A CN103978170 A CN 103978170A
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- crystallizer
- ingot casting
- semi
- continuous casting
- cast ingot
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 26
- 238000009749 continuous casting Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000498 cooling water Substances 0.000 claims abstract description 28
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 76
- 238000004321 preservation Methods 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 9
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract 3
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 239000007921 spray Substances 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 22
- 238000001816 cooling Methods 0.000 description 11
- 239000010687 lubricating oil Substances 0.000 description 11
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000013461 design Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 6
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Continuous Casting (AREA)
Abstract
The invention relates to a semi-continuous casting crystallizer for an aluminum alloy near net shape cast ingot. The semi-continuous casting crystallizer comprises a crystallizer body and a thermal insulation hot top, wherein the thermal insulation hot top is arranged on the crystallizer body, an oil-gas distribution ring is arranged between the thermal insulation hot top and the crystallizer, gas injection holes and oil injection holes are uniformly distributed in the oil-gas distribution ring along the circumferential direction, the crystallizer body comprises a cooling water cavity and water spray structures communicated with the water cavity, the water spray structures are water seam structures with unequal widths, so that the cooling water flow in the circumferential direction of the crystallizer is a non-equivalent value. According to the crystallizer, liquid metal can be restrained, so that the liquid metal is condensed to a required shape of the cast ingot, and the cast ingot has a smooth surface and consistent quality to meet the dimensional requirements on subsequent thermal forming of the cast ingot. The cast ingot has stable forming condition, smooth surface and no defects, such as a drawing stamp and a gap.
Description
Technical field
The present invention relates to the nearly end form ingot casting of a kind of aluminium alloy Semi-continuous casting crystallizer, belong to aluminum alloy semi-continuous casting technical field.
Background technology
Conventional aluminium alloy cast ingot shape mostly is circle or rectangle at present, and circle ingot casting is mainly used in the follow-up section bar that is squeezed into various shapes, and flat ingot casting is plate, band, the foil that rectangle ingot casting is mainly used in being rolled into desired thickness.Nearly end form aluminium alloy cast ingot shape is different from conventional aluminium alloy round cast ingot or flat ingot casting, it is mainly the appearance and size that designs ingot casting according to the shape of subsequent product, then adopt the mode of low cost semi-continuous casting to prepare the nearly end form aluminium alloy cast ingot that geomery and final products profile approach, for the follow-up alloy product that directly forges.
Crystallizer is key and the capital equipment of preparing aluminium alloy ingot blank, and the airtight casing that it often forms an internal storage cooling circulating water by metal provides the cooling of liquid metal and retrains its coagulation forming.Prepare the incipient stage at ingot casting, dummy ingot base and crystallizer form the space of a bottom lock.After casting starts, liquid metal flows into crystallizer inside and keeps certain height, and crystallizer passes into a certain amount of cooling circulating water.Under the effect of cooling water, liquid metal contacts with crystallizer inwall and is frozen into gradually skim solidified shell, and along with moving down of dummy ingot base, whole ingot casting touches the cooling water of crystallizer inside and coagulation forming gradually under the effect of cooling water gradually.Therefore, crystallizer not only plays cool metal ingot casting, makes its coagulation forming, and it also plays constraint liquid metal simultaneously, makes whole ingot casting be frozen into smoothly the effect that needs shape.As can be seen here, the difference of ingot casting geomery and the quality of surface quality, vital effect is played in the casting crystallizer design of its restriction molding.
Along with improving constantly of aluminium processing section product quality requirement, aluminium alloy crystallizer has experienced copper coin crystallizer, short groove crystallizer, Hot-Top mould and follow-up advanced person's gas lubricated crystallizer and the developing stage of low liquid level casting crystallizer, coming into operation of these advanced crystallizers brought revolutionary impact for aluminium alloy cast ingot quality, not only make inside ingot metallurgical quality significantly improve, and ingot surface quality has been realized rapid progress especially, ingotism layer thickness reduces, milling face amount reduces, and comprehensive production efficiency significantly improves.
But aluminum current Alloys Casting crystallizer is mainly to prepare round ingot casting and flat ingot casting as main, to have no mold structure and the composition relevant report that can cast irregular ingot casting shape.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, the nearly end form ingot casting of a kind of aluminium alloy Semi-continuous casting crystallizer is provided, according to subsequent thermal modified product shape requirement, design aluminium alloy cast ingot cross sectional shape size, and then prepare aluminium alloy ingot blank in irregular shape and ensure surface of ingot blank quality and the requirement of segregation layer thickness, thereby meet subsequent thermal processing and be out of shape the needs of direct preparing product.
Object of the present invention is achieved through the following technical solutions:
The nearly end form ingot casting of aluminium alloy Semi-continuous casting crystallizer, feature is: comprise crystallizer body and heat preservation hot top, heat preservation hot top is placed on crystallizer body, between heat preservation hot top and crystallizer body, be provided with oil gas and distribute ring, on oil gas distribution ring, injecting hole and oil filler point are uniformly distributed circumferentially, the water spraying structure that described crystallizer body comprises cooling water cavity and is connected with water cavity, water spraying structure is non-wide formula water crack structure, makes to distribute along the circumferential cooling water flow non-equivalent of crystallizer.
Further, the nearly end form ingot casting of above-mentioned aluminium alloy Semi-continuous casting crystallizer, is provided with water knockout drum in described cooling water cavity.
Further, the nearly end form ingot casting of above-mentioned aluminium alloy Semi-continuous casting crystallizer, the width of described oil filler point is 0～2.5mm, is highly 0～1.6mm, the spacing of adjacent two oil filler points is 1～5mm.
Further, the nearly end form ingot casting of above-mentioned aluminium alloy Semi-continuous casting crystallizer, the width of described injecting hole is 0～3.9mm, is highly 0～2.8mm, the spacing of adjacent two injecting holes is 1～6mm.
The substantive distinguishing features that technical solution of the present invention is outstanding and significant progressive being mainly reflected in:
1. heat preservation hot top is arranged in crystallizer body top, works to keep melt temperature, increases fluidity of molten, improves metal feeding capacity; Not only can retrain liquid metal, make it be frozen into needed ingot casting shape, and can guarantee ingot casting smooth surface, uniform quality, meet the dimensional requirement of ingot casting subsequent thermal moulding;
2. adopt non-wide formula water seam, realize along ingot casting periphery and rely on water seam width adjusting cooling water flow value, realize cooling water flow and be non-equivalent distribution along ingot casting periphery; Distribute to control intensity of cooling and the solidification shrinkage trend of nearly end form ingot casting entirety according to the non-equivalent of cooling water flow, and then realize smooth casting;
3. oil gas distributes ring to play the effect that improves ingot surface quality, compressed air and lubricating oil enter by injecting hole and oil filler point respectively, wherein compressed air and melt pressure form dynamic equilibrium, under heat preservation hot top, edge promotes metal bath, make it form meniscus, reduce the static pressure of metal solution to crystallizer liner, lubricating oil forms skim lubricating oil film at crystallizer inwall after oil outlet, play continuous lubricating crystallizer inner surface, reduce the effect of frictional force between ingot casting surface and crystallizer; The ingot blank that adopts this crystallizer to prepare, ingot casting moulding situation is stable, and smooth surface, without drawing the defect such as trace, breach.
Brief description of the drawings
Below in conjunction with accompanying drawing, technical solution of the present invention is described further:
Fig. 1: cross-sectional schematic of the present invention;
Fig. 2: schematic top plan view of the present invention.
Detailed description of the invention
As Fig. 1, shown in Fig. 2, the nearly end form ingot casting of aluminium alloy Semi-continuous casting crystallizer, comprise crystallizer body 2 and heat preservation hot top 1, heat preservation hot top 1 is placed on crystallizer body 2, between heat preservation hot top 1 and crystallizer body 2, be provided with oil gas and distribute ring 4, oil gas distributes on ring 4 along being circumferentially evenly distributed with respectively injecting hole 6 and oil filler point 5, the water spraying structure that crystallizer body 2 comprises cooling water cavity and is connected with water cavity, water spraying structure is non-wide formula water crack structure 8, the water spraying structure that crystallizer body comprises cooling water cavity and is connected with water cavity, water spraying structure is non-wide formula water crack structure, make to distribute along the circumferential cooling water flow non-equivalent of crystallizer, in 0 L/min × mm ~ 0.95 L/min × mm range, in cooling water cavity, be provided with water knockout drum 7.
Making cooling water flow be non-equivalent along ingot casting periphery by non-wide formula water crack structure 8 distributes, according to ingot casting appearance and size, by adjust crystallizer water seam width make cooling water flow line density along ingot casting periphery in 0 L/min × mm ~ 0.95 L/min × mm range.Crystallizer dependence water seam or hole for water spraying mode realize cooling water flow line density and change along ingot casting periphery.
Crystallizer adopts heat preservation hot top and cooling wall to solidify ingot casting, for improving the surface quality of nearly end form ingot casting, controls segregation layer thickness, be designed with oil gas and distribute ring 4, play the effect that improves ingot surface quality, wherein, the width of oil filler point 5 is 0～2.5mm, be highly 0～1.6mm, the spacing of adjacent two oil filler points is 1～5mm, and the width of injecting hole 6 is 0～3.9mm, is highly 0～2.8mm, the spacing of adjacent two injecting holes is 1～6mm, the oilhole that oil filler point is designed to body to get through.In casting process, compressed air and lubricating oil enter oil gas by injecting hole 6 and oil filler point 5 respectively and distribute ring 4, wherein compressed air and melt pressure form dynamic equilibrium, under heat preservation hot top, edge promotes metal bath, make it form meniscus, reduce the static pressure of metal solution to crystallizer liner.Lubricating oil forms skim lubricating oil film at crystallizer inwall after oil outlet, plays continuous lubricating crystallizer inner surface, reduces the effect of frictional force between ingot casting surface and crystallizer.In casting process, nearly end form crystallizer adopts oil gas to distribute ring continuously for after compressed air and lubricating oil, and ingot surface quality significantly improves.Also can be according to ingot surface quality requirement, in casting process, can select to lead to lubricating oil and compressed air, or continuous oil injecting lubricating only obstructed compressed air, or obstructed lubricating oil and compressed air simultaneously simultaneously.
Heat preservation hot top 1 is arranged in crystallizer body 2 tops, works to keep melt temperature, increases fluidity of molten, improves metal feeding capacity.Crystallizer body 2 is formed through machined by aluminum alloy plate materials or the red copper sheet material of rolling deformation, and in casting process, crystallizer body 2 liners directly contact aluminum melt, and the once cooling of nearly end form ingot casting is provided.For the cooling water that ensures crystallizer inside is evenly distributed, avoid because of crystallizer chamber body out-of-shape and the asymmetric cooling water flow variation causing of water inlet position, have water knockout drum 7 in crystallizer indoor design, its effect is the object that keeps height of water level, uniform distribution water cavity internal cooling discharge in cavity.
Because of nearly not specification of end form crystallizer internal cavity shape, therefore metal bath is inconsistent at the freezing rate of each position of inner chamber, and some position is even subject to shape difference affect and cause freezing rate difference excessive.For ensureing carrying out smoothly of casting process, adopt non-wide formula water seam, rely on water seam width adjusting cooling water flow value along ingot casting periphery, realize cooling water flow and be non-equivalent distribution along ingot casting periphery.Control intensity of cooling and the solidification shrinkage trend of nearly end form ingot casting entirety according to the variation of cooling water flow, and then realize smooth casting.
Adopt crystallizer not only can retrain liquid metal, make it be frozen into needed ingot casting shape, and can guarantee ingot casting smooth surface, uniform quality, meet the dimensional requirement of ingot casting subsequent thermal moulding.
First according to shape of product, consider thermal deformation requirement, the ingot casting appearance and size that design outline is close, designs nearly end form mold shape and thermal insulating material shape after the solidification shrinkage amount of consideration ingot casting.Thermal insulating material is arranged in crystallizer body top, plays and keeps molten metal temperature and above crystallizer, maintain certain metal liquid height, improves the mobility of melt and the effect of stamp.
According to the nearly end form ingot casting geomery of design, adjust the overall intensity of cooling of ingot casting by adjusting the circumferential cooling water sphere of action of crystallizer and intensity, and then control the solidification shrinkage amount of nearly end form ingot casting diverse location, realize the even contraction distortion of whole nearly end form ingot casting.Because of nearly end form ingot casting change of shape, the intensity of cooling of each position of ingot casting differs greatly, different with flat ingot casting crystallizer from traditional round ingot casting, nearly end form crystallizer cooling water flow must circumferentially be adjusted along crystallizer according to the change of cast ingot position, otherwise will cause some position of ingot casting to produce excess shrinkage, increase the frictional force of ingot casting surface and crystallizer inwall, cause ingot casting cracking or surperficial tear mark, cannot realize smooth moulding.Therefore, this crystallizer adopts non-wide formula water to seam meter and adjusts the intensity of cooling value of ingot casting diverse location, and then adjusts the solidification shrinkage amount of nearly end form ingot casting entirety.
In addition, for improving the surface quality of ingot casting, improve forging process lumber recovery, design oil gas distributes ring.In use set the scope of oil and gas content addition according to technological requirement.If ingot surface quality is required strictly, can select simultaneously continuously for lubricating oil and compressed air.Crystallizer supplies after lubricating oil gas medium continuously, ingot casting smooth surface, stable, and segregation layer thickness can be controlled at and be less than 0.9mm.
The nearly end form 6 ' ' ' line aluminium alloy ingot blank that adopts crystallizer of the present invention to prepare, ingot casting moulding situation is stable, and smooth surface, without drawing the defect such as trace, breach.
It is to be understood that: the above is only the preferred embodiment of the present invention; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the nearly end form ingot casting of aluminium alloy Semi-continuous casting crystallizer, it is characterized in that: comprise crystallizer body and heat preservation hot top, heat preservation hot top is placed on crystallizer body, between heat preservation hot top and crystallizer body, be provided with oil gas and distribute ring, on oil gas distribution ring, injecting hole and oil filler point are uniformly distributed circumferentially, the water spraying structure that described crystallizer body comprises cooling water cavity and is connected with water cavity, water spraying structure is non-wide formula water crack structure, makes to distribute along the circumferential cooling water flow non-equivalent of crystallizer.
2. the nearly end form ingot casting of aluminium alloy according to claim 1 Semi-continuous casting crystallizer, is characterized in that: in described cooling water cavity, be provided with water knockout drum.
3. the nearly end form ingot casting of aluminium alloy according to claim 1 Semi-continuous casting crystallizer, is characterized in that: the width of described oil filler point is 0～2.5mm, is highly 0～1.6mm, and the spacing of adjacent two oil filler points is 1～5mm.
4. the nearly end form ingot casting of aluminium alloy according to claim 1 Semi-continuous casting crystallizer, is characterized in that: the width of described injecting hole is 0～3.9mm, is highly 0～2.8mm, and the spacing of adjacent two injecting holes is 1～6mm.
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| CN201410179871.4A CN103978170B (en) | 2014-04-30 | 2014-04-30 | Semi-continuous casting crystallizer for aluminum alloy near net shape cast ingot |
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| CN103978170B CN103978170B (en) | 2017-02-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522132A (en) * | 2016-01-21 | 2016-04-27 | 东北大学 | Triangular continuous casting slab preparation device and using method thereof |
| CN106077541A (en) * | 2016-08-19 | 2016-11-09 | 中国重型机械研究院股份公司 | Magnesium alloy continuous casting crystallizer automatic fuelling device |
| CN106925735A (en) * | 2015-12-30 | 2017-07-07 | 北京有色金属研究总院 | A kind of device and method for preparing big specification high-quality aluminium alloy cast ingot |
| CN110899647A (en) * | 2019-12-19 | 2020-03-24 | 辽宁忠旺机械设备制造有限公司 | Crystallizer oil-gas lubrication control system and method |
| CN113664167A (en) * | 2021-08-18 | 2021-11-19 | 二重（德阳）重型装备有限公司 | Ingot mould |
| CN113976844A (en) * | 2021-10-21 | 2022-01-28 | 捷安特轻合金科技(海安)有限公司 | Special-shaped aluminum alloy ingot casting crystallization device capable of casting multiple aluminum alloy ingots simultaneously |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113664167A (en) * | 2021-08-18 | 2021-11-19 | 二重（德阳）重型装备有限公司 | Ingot mould |
| CN113976844A (en) * | 2021-10-21 | 2022-01-28 | 捷安特轻合金科技(海安)有限公司 | Special-shaped aluminum alloy ingot casting crystallization device capable of casting multiple aluminum alloy ingots simultaneously |
| CN113976844B (en) * | 2021-10-21 | 2022-11-25 | 捷安特轻合金科技(海安)有限公司 | Special-shaped aluminum alloy ingot casting crystallization device capable of casting multiple aluminum alloy ingots simultaneously |
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Effective date of registration: 20171011 Address after: 471000 Henan Province, Luoyang city high tech Development Zone middle Ling Road Patentee after: China Nonferrous Metals Processing Technology Co., Ltd. Address before: 215021 Suzhou Suzhou Nonferrous Metal Research Institute Co., Ltd., Jiangsu Patentee before: Suzhou Non-ferrous Metal academy Co., Ltd. |