CN101745628A - Synchronous composite casting method of multi-layer heterogeneous aluminum alloy - Google Patents
Synchronous composite casting method of multi-layer heterogeneous aluminum alloy Download PDFInfo
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- CN101745628A CN101745628A CN200810244176A CN200810244176A CN101745628A CN 101745628 A CN101745628 A CN 101745628A CN 200810244176 A CN200810244176 A CN 200810244176A CN 200810244176 A CN200810244176 A CN 200810244176A CN 101745628 A CN101745628 A CN 101745628A
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Abstract
The invention provides a synchronous composite casting method of a multi-layer heterogeneous aluminum alloy, which comprise: depending on the difference of the melting points of the heterogeneous aluminum alloy, firstly casting an alloy cast ingot with a high melting point, then casting an alloy cast ingot with a low melting point after the cast ingot with the high melting point is solidified at a certain temperature below a solidus line and has a certain intensity, realizing the liquid-solid metallurgical bonding of the two cast ingots under a thermal state, solidifying together to form a composite cast ingot under the action of the cooling water of a crystallizer. The junction surface of the heterogeneous aluminum alloy cast ingots uses the metallurgical bonding under a semisolid state in a casting process, the interface bonding strength is high, and the method is suitable for synchronously casting a double-layer composite cast ingot and a three-layer composite cast ingot.
Description
Technical field
The present invention relates to a kind of synchronous composite casting method of multi-layer heterogeneous aluminum alloy, belong to the aluminum alloy semi-continuous casting technical field.
Background technology
Aluminium alloy bimetallic or three-layer metal composite board are the important materials of making radiator, heat exchanger, are widely used in industries such as automobile, air-conditioning, oxygenerator, and market prospects are very wide.At present the production process that adopts of China's aluminium alloy compound sheet material is that at first the mode by the direct water-cooling semi-continuous casting prepares sandwich layer and clad ingot casting blank, and respectively sandwich layer, clad ingot casting are milled relevant treatment such as face, hot rolling, shearing, pickling, alkali cleaning, produce the aluminium alloy compound plate material by the compound mode of hot rolling at last.
Not only the production cycle is long, operation is many, labour intensity is big to adopt this hot rolling combination process to prepare aluminium alloy compound plate, and the easy oxidation of compound interface in the rolling recombination process of sandwich layer and clad, metal composite layer bond strength are low.Deficiency at current aluminium alloy compound board production technology existence, Novelis company has developed the synchronous foundry engieering of the flat ingot casting of aluminium alloy compound and has dropped into commercial operation, be direct pouring sandwich layer and clad metal in the process of metal direct water-cooling semi-continuous casting, make it realize that under semi-solid state metallurgical seam also directly is cast as bilayer or three-layer alloy ingot, then this composite ingot is carried out hot rolling and the cold rolling aluminium alloy compound plate material of producing, production cost descends significantly.
The synchronous foundry engieering of aluminium alloy compound slab ingot is external a kind of advanced aluminium alloy semi-continuous casting technology newly developed, and related process and technological core are in the state of being kept absolutely secret.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of synchronous composite casting method of multi-layer heterogeneous aluminum alloy is provided, be intended to effectively simplify technological process, cast out the multi-layer heterogeneous aluminum alloy slab ingot.
Purpose of the present invention is achieved through the following technical solutions:
Synchronous composite casting method of multi-layer heterogeneous aluminum alloy, concrete processing step---
1) the heterogeneity aluminum alloy melt is melted in different smelting furnaces respectively, and carry out melt refining and slagging-off processing respectively;
2) when the casting beginning, earlier by molten bath and the control stream stopper higher sandwich layer metal of fusing point of in crystallizer, casting, the crystallizer upper design has dividing plate, the cooling effect of sandwich layer metal by crystallizer inwall and dividing plate be solidification forming at first, the intensity of cooling of control dividing plate is fully cooled off the sandwich layer metal in casting process;
3) treat that the sandwich layer metal freezing is to semi-solid temperature, open clad molten bath control stream stopper, in graphite mold, slowly inject the lower clad metal of fusing point, liquid level at the process control clad metal that injects, make in its scope that remains on dividing plate bottom lower edge 10～30mm, behind the liquid clad metal bath contact sandwich layer supporting surface, the clad melt solidifies under interface cooling, solidifies latent heat of solidification that the back discharges and the sandwich layer interface is reheated to semi-solid temperature carries out metallurgical binding;
4) the dummy ingot base constantly descends, and the compound slab ingot of strong bonded breaks away from crystallizer gradually and touches secondary cooling water, and sandwich layer and clad ingot casting are frozen into compound slab ingot simultaneously under the effect of cooling water.
Further, above-mentioned synchronous composite casting method of multi-layer heterogeneous aluminum alloy, step 2) intensity of cooling of control dividing plate in casting process, sandwich layer metal partion (metp) lower end interface temperature is in 50 ℃～150 ℃ scopes of this alloy subsolidus.
Further, above-mentioned synchronous composite casting method of multi-layer heterogeneous aluminum alloy, step 3) is in casting process, and the liquid fluctuating scope of sandwich layer and clad metal is controlled at ± 5mm.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
Synchronous composite casting method of multi-layer heterogeneous aluminum alloy of the present invention, rely on the different difference of heterogeneity aluminum alloy fusing point, at first cast the high alloy cast ingot of fusing point, treat that dystectic ingot solidification casts low-melting alloy cast ingot again to uniform temperature and after having certain intensity, two kinds of alloy cast ingots are realized metallurgical binding under hot state, realize the synchronous casting of heterogeneity aluminum alloy ingot blank.Adopt the compound ingot blank of mould casting of internal partition design, this dividing plate had both been separated aluminium alloy melt not of the same race in the crystallizer, and the once cooling of ingot casting is provided again.Heterogeneity aluminum alloy pouring bay faying face is the metallurgical binding under the semi-solid state in the casting process, the interface bond strength height; Can cast bilayer or three layers of aluminium alloy compound ingot casting synchronously, composite ingot is synchronous solidification forming under the cooling effect of crystallizer, has simplified the preparation technology of clad aluminium greatly.
The specific embodiment
The invention provides synchronous composite casting method of multi-layer heterogeneous aluminum alloy, rely on the difference of heterogeneity aluminum alloy fusing point, at first cast the high alloy cast ingot of fusing point, treat that dystectic ingot solidification casts low-melting alloy cast ingot again to the subsolidus uniform temperature and after having certain intensity, two-layer ingot casting is realized liquid-solid metallurgical binding under hot state, and is frozen into composite ingot jointly under the cooling water effect of crystallizer.
During concrete the casting, its detailed process process is: at first the heterogeneity aluminum alloy melt is melted in different smelting furnaces respectively, and carry out melt refining and slagging-off processing respectively.When the casting beginning, earlier by molten bath and the control stream stopper higher sandwich layer metal of fusing point of in crystallizer, casting, the crystallizer upper design has dividing plate, the cooling effect of sandwich layer metal by crystallizer inwall and dividing plate be solidification forming at first, the intensity of cooling of control dividing plate in casting process, sandwich layer metal partion (metp) lower end interface temperature fully cools off the sandwich layer metal in 50 ℃～150 ℃ scopes of this alloy subsolidus.Treat that the sandwich layer metal freezing is to semi-solid temperature, open clad molten bath control stream stopper, in graphite mold, slowly inject the lower clad metal of fusing point, liquid level at the process control clad metal that injects, make in its scope that remains on dividing plate bottom lower edge 10～30mm, behind the liquid clad metal bath contact sandwich layer supporting surface, the clad melt solidifies under the cooling of interface, solidifies latent heat of solidification that the back discharges and the sandwich layer interface is reheated to semi-solid temperature carries out metallurgical binding; In casting process, the liquid fluctuating scope of sandwich layer and clad metal is controlled at ± 5mm.The dummy ingot base constantly descends, and the compound slab ingot of strong bonded breaks away from crystallizer gradually and touches secondary cooling water, and sandwich layer and clad ingot casting are frozen into compound slab ingot simultaneously under the effect of cooling water.
It should be noted that above-mentioned process has been described the synchronous casting process of two-layer compound ingot casting, suitable equally for three layers of composite ingot the method.Melt fusing, refining and slagging-off are handled, treated that after the melt composition meets the demands the heterogeneity aluminum alloy melt being imported crystallizer casts; In crystallizer, mix when preventing that aluminium alloy melt not of the same race is liquid, the crystallizer upper design has one can separate aluminum melt, the baffle plate device of refrigerating function can be provided again, in the casting process, dividing plate is separated aluminium alloy melt not of the same race in crystallizer, simultaneously dividing plate has high thermal, and the aluminium alloy melt of dividing plate both sides is also played the once effect of cooling.During casting, at first cast the high alloy of fusing point, treat this alloy under the cooling effect of dividing plate, solidify have certain intensity to uniform temperature and outer surface solidified shell after beginning second kind of lower alloy of injection fusing point in the crystallizer.Like this, the outer surface solidified shell of high-melting-point alloy plays the supporting role of fixing its profile to low-melting-point metal on the one hand, form supporting surface, the latent heat of solidification that discharges after low-melting alloy solidifies on the other hand is heated to semi-solid temperature once more with this supporting surface, quicken the interatomic thermal diffusion of heterogeneity aluminum alloy thereby play, realize the purpose of heterogeneity aluminum alloy pouring bay metallurgical binding.At last, the heterogeneity aluminum alloy ingot casting synchronous solidification forming under the effect of crystallizer cooling water that has firm metallurgical binding face.
In sum, synchronous composite casting method of multi-layer heterogeneous aluminum alloy of the present invention, rely on the different difference of heterogeneity aluminum alloy fusing point, at first cast the high alloy cast ingot of fusing point, treat that dystectic ingot solidification casts low-melting alloy cast ingot again to uniform temperature and after having certain intensity, two kinds of alloy cast ingots are realized metallurgical binding under hot state, realize the synchronous casting of heterogeneity aluminum alloy ingot blank.Adopt the mould casting composite ingot of baffle design, dividing plate has both separates aluminium alloy melt not of the same race, again the function of cooling multiplayer ingot casting.Along with moving down of dummy ingot base, composite ingot is synchronous solidification forming under the cooling effect of crystallizer cooling water.The combination under metallurgical state of sandwich layer and clad, the interface bond strength height; Be suitable for the two-layer compound ingot casting and three layers of composite ingot are cast synchronously.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (3)
1. synchronous composite casting method of multi-layer heterogeneous aluminum alloy is characterized in that: may further comprise the steps---
1) the heterogeneity aluminum alloy melt is melted in different smelting furnaces respectively, and carry out melt refining and slagging-off processing respectively;
2) when the casting beginning, earlier by molten bath and the control stream stopper higher sandwich layer metal of fusing point of in crystallizer, casting, the crystallizer upper design has dividing plate, the cooling effect of sandwich layer metal by crystallizer inwall and dividing plate be solidification forming at first, the intensity of cooling of control dividing plate is fully cooled off the sandwich layer metal in casting process;
3) treat that the sandwich layer metal freezing is to semi-solid temperature, open clad molten bath control stream stopper, in graphite mold, slowly inject the lower clad metal of fusing point, liquid level at the process control clad metal that injects, make in its scope that remains on dividing plate bottom lower edge 10～30mm, behind the liquid clad metal bath contact sandwich layer supporting surface, the clad melt solidifies under interface cooling, solidifies latent heat of solidification that the back discharges and the sandwich layer interface is reheated to semi-solid temperature carries out metallurgical binding;
4) the dummy ingot base constantly descends, and the compound slab ingot of strong bonded breaks away from crystallizer gradually and touches secondary cooling water, and sandwich layer and clad ingot casting are frozen into compound slab ingot simultaneously under the effect of cooling water.
2. synchronous composite casting method of multi-layer heterogeneous aluminum alloy according to claim 1, it is characterized in that: step 2) intensity of cooling of control dividing plate in casting process, sandwich layer metal partion (metp) lower end interface temperature is in 50 ℃～150 ℃ scopes of this alloy subsolidus.
3. synchronous composite casting method of multi-layer heterogeneous aluminum alloy according to claim 1 is characterized in that: step 3) is in casting process, and the liquid fluctuating scope of sandwich layer and clad metal is controlled at ± 5mm.
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| CN200810244176A CN101745628A (en) | 2008-12-18 | 2008-12-18 | Synchronous composite casting method of multi-layer heterogeneous aluminum alloy |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407298A (en) * | 2011-11-28 | 2012-04-11 | 苏州有色金属研究院有限公司 | Composite aluminum alloy round ingot blank |
| CN102909347A (en) * | 2012-10-29 | 2013-02-06 | 黄宣斐 | Composite aluminum alloy material |
| CN105251973A (en) * | 2014-07-17 | 2016-01-20 | 乔治费希尔有限责任公司 | Compound cast part |
| CN106363153A (en) * | 2016-09-18 | 2017-02-01 | 华北理工大学 | Method for preparing bimetal composite cast ingot through solidified liquid pool |
| CN107262525A (en) * | 2017-07-06 | 2017-10-20 | 兰州理工大学 | The method of aluminum-based layered composite material semi-solid state roll forming |
| CN113333694A (en) * | 2021-05-24 | 2021-09-03 | 佛山市三水凤铝铝业有限公司 | Casting equipment and method for bimetal aluminum alloy hollow ingot |
| CN114619043A (en) * | 2020-12-10 | 2022-06-14 | 上海交通大学 | Preparation method and device of composite aluminum alloy plate based on liquid metal 3D printing |
| CN117900397A (en) * | 2024-03-15 | 2024-04-19 | 江苏常铝铝业集团股份有限公司 | Preparation method of anti-corrosion high-corrosion-resistance aluminum alloy layered composite material |
-
2008
- 2008-12-18 CN CN200810244176A patent/CN101745628A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407298A (en) * | 2011-11-28 | 2012-04-11 | 苏州有色金属研究院有限公司 | Composite aluminum alloy round ingot blank |
| CN102909347A (en) * | 2012-10-29 | 2013-02-06 | 黄宣斐 | Composite aluminum alloy material |
| CN105251973A (en) * | 2014-07-17 | 2016-01-20 | 乔治费希尔有限责任公司 | Compound cast part |
| CN106363153A (en) * | 2016-09-18 | 2017-02-01 | 华北理工大学 | Method for preparing bimetal composite cast ingot through solidified liquid pool |
| CN107262525A (en) * | 2017-07-06 | 2017-10-20 | 兰州理工大学 | The method of aluminum-based layered composite material semi-solid state roll forming |
| CN114619043A (en) * | 2020-12-10 | 2022-06-14 | 上海交通大学 | Preparation method and device of composite aluminum alloy plate based on liquid metal 3D printing |
| CN113333694A (en) * | 2021-05-24 | 2021-09-03 | 佛山市三水凤铝铝业有限公司 | Casting equipment and method for bimetal aluminum alloy hollow ingot |
| CN117900397A (en) * | 2024-03-15 | 2024-04-19 | 江苏常铝铝业集团股份有限公司 | Preparation method of anti-corrosion high-corrosion-resistance aluminum alloy layered composite material |
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Open date: 20100623 |