CN108724890B - Production method of aluminum alloy composite plate strip blank for milling side surface of interlayer alloy at small angle - Google Patents
Production method of aluminum alloy composite plate strip blank for milling side surface of interlayer alloy at small angle Download PDFInfo
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- CN108724890B CN108724890B CN201810381314.9A CN201810381314A CN108724890B CN 108724890 B CN108724890 B CN 108724890B CN 201810381314 A CN201810381314 A CN 201810381314A CN 108724890 B CN108724890 B CN 108724890B
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
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Abstract
A method for producing an aluminum alloy composite plate strip blank by milling the side surface of an intermediate layer alloy at a small angle. The invention relates to a method for producing a composite material plate strip blank. The invention aims to solve the problems of uneven edge coating, more trimming wastes and low yield of the existing hot-rolled plate strip blank. The method comprises the following steps: (1) heating the cast ingot with the milled brazing layer, and performing hot rolling and saw cutting after heat preservation; (2) the milling machine performs side milling on the large surface and the small angle of the core layer cast ingot; (3) respectively assembling two brazing layer plates obtained in the step 1 on the upper surface and the lower surface of the core layer with the milled surfaces in the step 2, and binding the brazing layer plates into a composite ingot by using steel strips after spot welding; (4) heating the composite ingot obtained in the step 3, and preserving heat; (5) and (4) carrying out hot rolling on the composite ingot in the step (4) to obtain the composite plate strip blank coiled material. The invention is used for producing the coiled material of the composite plate strip blank.
Description
Technical Field
The invention relates to a method for producing a composite material plate strip blank.
Background
The aluminum alloy composite material is used as a raw material for preparing air separation heat dissipation equipment and is produced by adopting a brazing process, a brazing layer alloy is used as welding metal, and an interlayer alloy is used as a compression-resistant support structure body. Therefore, the premise of ensuring firm welding and high compressive strength is that the coating layer is uniformly distributed. The prior production process is that the intermediate layer alloy is not subjected to side milling. The disadvantages of this production method are: when hot rolling is carried out for composite production, the skin material deforms firstly, and the skin material extends and deforms fast close to the edge part, so that the edge part is coated unevenly.
Disclosure of Invention
The invention provides a production method of an aluminum alloy composite plate strip blank milled at a small angle on the side surface of a middle layer alloy, aiming at solving the problems of uneven edge coating, more trimming wastes and low yield of the existing hot rolled plate strip blank.
The production method of the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the intermediate layer alloy is specifically carried out according to the following steps:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 460-480 ℃, preserving heat for 2-10 hours at the temperature of 460-480 ℃, starting hot rolling after heat preservation, rolling to the thickness of 45-110 mm, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milled side surface is 5-20 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 460-480 ℃, and then preserving heat for 2-10 hours at the temperature of 460-480 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 3.5-8 mm.
The invention has the beneficial effects that:
according to the invention, the intermediate alloy core material is subjected to small-angle side milling, then is subjected to hot rolling compounding with the brazing layer, and is matched with large reduction rolling, so that the phenomenon that the edge coating is not uniform and the coating thickness is low due to rapid deformation of the blank material at the edge is avoided, and therefore, under the condition that the widths of the cast ingot intermediate layer and the brazing layer are not changed, the trimming amount is reduced, and the yield is improved. And the energy consumption is reduced by reducing the rolling pass, and the practical operation shows that the trimming amount is reduced to 50mm from the previous 100mm to the single-side trimming amount of the finished product, the hot rolling yield is improved to about 98% from about 92% before, and the hot rolling pass is reduced to about 26 from about 30 before.
Drawings
FIG. 1 is a schematic structural view of a composite ingot bundled by steel strips after three-side spot welding in the process of the present invention; wherein 1 is brazing layer plate, and 2 is a milled surface core layer.
Detailed Description
The first embodiment is as follows: the production method of the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the intermediate layer alloy is specifically carried out according to the following steps:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 460-480 ℃, preserving heat for 2-10 hours at the temperature of 460-480 ℃, starting hot rolling after heat preservation, rolling to the thickness of 45-110 mm, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milled side surface is 5-20 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 460-480 ℃, and then preserving heat for 2-10 hours at the temperature of 460-480 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 3.5-8 mm.
The heating temperature in the first step of the embodiment is moderate, so that the phenomenon that the ingot is over-burnt due to overhigh temperature and the biting resistance of the ingot is increased due to overlow temperature to cause that the ingot cannot be bitten by rough rolling is avoided; and keeping the temperature for 2-10 h to ensure that the internal and external temperatures of the cast ingot are consistent.
Saw cutting four sides in this embodiment step one, in order to guarantee that brazing layer slab width and intermediate level slab width phase-match, it is extravagant to reduce the finished product side cut.
In the third step of the embodiment, the spot welding of the edge part can ensure that the blank material does not move left and right during rolling.
In the fourth step of the embodiment, the heating temperature is moderate, so that the problems that the surface oxidation is difficult to compound due to overhigh temperature and the deformation resistance is increased due to overlow temperature to increase the energy consumption are avoided; and keeping the temperature for 2-10 h to ensure that the internal and external temperatures of the cast ingot are consistent.
The angle of the milling side face in the second step of the embodiment is 5-20 degrees with the large face, so that the edge coating rate is stable, the phenomenon that the edge coating rate is higher than the integral average value due to the overlarge angle is avoided, and the edge coating rate is lower due to the undersize.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: rolling to 54mm thickness in the first step. Other steps and parameters are the same as those in the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: rolling to the thickness of 74mm in the first step. Other steps and parameters are the same as those in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: in the second step, the angle of the milled side surface is 6 degrees with the large surface. Other steps and parameters are the same as those in one of the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: and in the second step, the angle of the milled side surface is 8 degrees with the large surface. Other steps and parameters are the same as those in one of the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is: and in the second step, the angle of the milled side surface is 9 degrees with the large surface. Other steps and parameters are the same as those in one of the first to fifth embodiments.
The seventh embodiment: the difference between this embodiment and one of the first to sixth embodiments is: and fifthly, the rolling reduction of the first 5 times of hot rolling is 18-25 mm. Other steps and parameters are the same as those in one of the first to sixth embodiments.
The specific implementation mode is eight: the present embodiment differs from one of the first to seventh embodiments in that: and fifthly, the thickness of the composite plate strip blank coiled material is 5 mm. Other steps and parameters are the same as those in one of the first to seventh embodiments.
The beneficial effects of the present invention are demonstrated by the following examples:
the first embodiment is as follows: the production method of the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the intermediate layer alloy is specifically carried out according to the following steps:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 480 ℃, preserving the heat for 2 hours at the temperature of 480 ℃, starting hot rolling after preserving the heat, rolling to the thickness of 45mm, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milling side surface is 6 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 480 ℃, and then preserving heat for 2 hours at the temperature of 480 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 5 mm.
Example two: the production method of the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the intermediate layer alloy is specifically carried out according to the following steps:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 480 ℃, preserving the heat for 4 hours at the temperature of 480 ℃, starting hot rolling after preserving the heat, rolling to 54mm thickness, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milling side surface is 6 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 470 ℃, and then preserving heat for 5 hours at the temperature of 470 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 4 mm.
Example three: the production method of the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the intermediate layer alloy is specifically carried out according to the following steps:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 470 ℃, preserving the heat for 5 hours at the temperature of 470 ℃, starting hot rolling after preserving the heat, rolling to the thickness of 74mm, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milling side surface is 8 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 480 ℃, and then preserving heat for 5 hours at the temperature of 480 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 7 mm.
Example four: the production method of the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the intermediate layer alloy is specifically carried out according to the following steps:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 460 ℃, preserving heat for 6 hours at the temperature of 460 ℃, starting hot rolling after heat preservation, rolling to the thickness of 103mm, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milling side surface is 9 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 470 ℃, and then preserving heat for 4 hours at the temperature of 470 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 6 mm.
Example five: the production method of the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the intermediate layer alloy is specifically carried out according to the following steps:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 460 ℃, preserving heat for 3 hours at the temperature of 460 ℃, starting hot rolling after heat preservation, rolling to the thickness of 45mm, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milling side surface is 6 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 470 ℃, and then preserving heat for 3 hours at the temperature of 470 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 4 mm.
According to the invention, the intermediate alloy core material is subjected to small-angle side milling, then is subjected to hot rolling compounding with the brazing layer, and is matched with large reduction rolling, so that the phenomenon that the edge coating is not uniform and the coating thickness is low due to rapid deformation of the blank material at the edge is avoided, and therefore, under the condition that the widths of the cast ingot intermediate layer and the brazing layer are not changed, the trimming amount is reduced, and the yield is improved.
Claims (8)
1. A production method of an aluminum alloy composite plate strip blank milled at a small angle on the side surface of an intermediate layer alloy is characterized by comprising the following steps of:
firstly, putting an ingot with a milled brazing layer into a heating furnace, heating the temperature of the heating furnace from room temperature to 460-480 ℃, preserving heat for 2-10 hours at the temperature of 460-480 ℃, starting hot rolling after heat preservation, rolling to the thickness of 45-110 mm, naturally cooling to room temperature, and sawing four sides by using a sawing machine to obtain a brazing layer plate;
secondly, milling the large surface and the side surface of the core layer cast ingot by using a milling machine to obtain a milled core layer; the angle of the milled side surface is 5-20 degrees with the large surface;
assembling the two brazing layer plates obtained in the first step on the upper surface and the lower surface of the milled core layer, and binding the edge parts into a composite ingot by using steel strips after spot welding;
fourthly, heating the composite ingot to 460-480 ℃, and then preserving heat for 2-10 hours at the temperature of 460-480 ℃ to obtain the heated composite ingot;
fifthly, carrying out hot rolling on the heated composite ingot to obtain a composite plate strip blank coiled material; the thickness of the composite plate strip blank coiled material is 3.5-8 mm.
2. The method for producing the composite aluminum alloy strip blank with the interlayer alloy side milled at the small angle according to claim 1, wherein the step one is rolling to a thickness of 54 mm.
3. The method for producing the composite aluminum alloy strip blank with the interlayer alloy side milled at the small angle according to claim 1, wherein the step one is rolling to the thickness of 74 mm.
4. The method for producing an intermediate layer alloy side surface small angle milled aluminum alloy composite plate strip blank according to claim 1, wherein the angle of the milled side surface in the second step is 6 degrees to the large surface.
5. The method for producing the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the interlayer alloy according to claim 1, wherein the angle of the milled side surface in the second step is 8 degrees to the large surface.
6. The method for producing an intermediate layer alloy side surface small angle milled aluminum alloy composite plate strip blank according to claim 1, wherein the angle of the milled side surface in the second step is 9 degrees to the large surface.
7. The method for producing the aluminum alloy composite plate strip blank milled at the small angle on the side surface of the interlayer alloy according to claim 1, wherein the reduction of the hot rolling of the first 5 passes in the fifth step is 18-25 mm.
8. The method for producing the composite plate strip blank of the aluminum alloy with the interlayer alloy side milled at the small angle according to the claim 1, wherein the thickness of the coiled material of the composite plate strip blank in the fifth step is 5 mm.
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| CN110976519A (en) * | 2019-12-17 | 2020-04-10 | 奥科宁克（昆山）铝业有限公司 | Production method of four-layer aluminum alloy composite plate strip blank |
| CN111702009B (en) * | 2020-06-28 | 2022-05-06 | 山东南山铝业股份有限公司 | Preparation method of T4 or T42-state 2024 aluminum alloy coated aluminum sheet |
| CN111906471B (en) * | 2020-07-13 | 2022-06-14 | 奥科宁克（昆山）铝业有限公司 | Multi-layer material brazing aluminum material with excellent internal and external corrosion performance and preparation method thereof |
| CN113858752A (en) * | 2021-10-08 | 2021-12-31 | 东北轻合金有限责任公司 | Manufacturing method of large-size aluminum alloy composite material with width of more than 1500mm |
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