CN111041283A - Production method of 3003 aluminum alloy wafer for deep-drawing expansion type electric cooker liner - Google Patents
Production method of 3003 aluminum alloy wafer for deep-drawing expansion type electric cooker liner Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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Abstract
The invention relates to a production method of aluminum alloy, in particular to a production method of a 3003 aluminum alloy wafer for a deep-drawing expansion type electric cooker liner, belonging to the technical field of alloy materials. The method comprises the following steps: smelting and casting an aluminum alloy ingot, homogenizing, hot rolling, cold rolling, annealing and punching to obtain an aluminum alloy finished product. The production method of the 3003 aluminum alloy deep-drawing wafer has the advantages of simple process, short flow, low energy consumption, low cost, and good deep-drawing performance and appearance quality.
Description
Technical Field
The invention relates to a production method of aluminum alloy, in particular to a production method of a 3003 aluminum alloy wafer for a deep-drawing expansion type electric cooker liner, belonging to the technical field of alloy materials.
Background
The aluminum alloy electric cooker liner product is popular with consumers and kitchenware industries due to the advantages of light weight, good deep drawing performance, high thermal uniformity, gorgeous color and luster after surface anodization and the like. At present, the deep-drawing expansion type pot body is attractive and beautiful, but the expansion type pot has high requirement on the toughness of a wafer product, so that the expansion type pot body has a requirement on the processing performance of a 3003 wafer product.
The traditional 3003 aluminum alloy wafer is mostly produced by adopting a casting and rolling method, and has the following defects which are difficult to overcome: the product has coarse grains, rough surface after drawing, cracks after expansion, and ear making effect after drawing due to the inherent defects of the cast and rolled material.
Disclosure of Invention
In order to solve the problem that the traditional 3003 wafer product cracks in the subsequent drawing and expanding process of customers, the production method of the 3003 aluminum alloy wafer for the drawing and expanding electric cooker liner is provided, crystal grains can be greatly refined, and the processing toughness of the wafer is improved.
The purpose of the invention is realized by the following technical scheme:
a production method of 3003 aluminum alloy wafers for deep-drawing expansion type electric cooker liners comprises the following steps:
1) smelting and casting an aluminum alloy ingot, wherein the aluminum alloy ingot comprises the following chemical components in percentage by mass:
0.2 to 0.3% of Si, 0.5 to 0.7% of Fe, 0.7 to 1.0% of Mn, 0.05 to 0.10% of Cu, 0 to 0.01% of Cr, 0.01 to 0.025% of Ti, 0 to 0.03% of Zn, 0.002 to 0.005% of Mg, and the balance of Al and unavoidable impurities;
2) and carrying out homogenization treatment, hot rolling, cold rolling, annealing and sheet punching on the aluminum alloy ingot obtained in the step 1) to obtain an aluminum alloy finished product.
Preferably, the homogenization treatment in the step 2) adopts a two-stage soaking mode, wherein the first-stage soaking temperature is 615 +/-10 ℃, the heat preservation time is 9-10 hours, and the uniform heat treatment is carried out along with furnace cooling to 445 +/-10 ℃; wherein the second-stage soaking temperature is 450 +/-10 ℃, the heat preservation time is 8-9 h, and the product is discharged from the furnace and cooled in air.
Preferably, the hot rolling start temperature in the step 2) is 500-530 ℃, and the finish rolling temperature is 330-350 ℃.
Preferably, the hot rolling in the step 2) comprises hot rough rolling and hot finish rolling, the transfer thickness of the hot rough rolling is 18-20 mm, and the thickness of the lower line after the hot finish rolling is 10-11 mm.
Preferably, the thickness of the finished product obtained by the cold rolling in the step 2) is 1.0-2.0 mm.
Preferably, the furnace gas temperature of the annealing in the step 2) is 420-480 ℃.
Preferably, the annealing strip heat treatment speed is 20-40 m/min.
The invention adopts special ingot chemical components, controls the Mg content to be 0.002-0.005%, and has scientific and reasonable proportion. The homogenization treatment is carried out by a 1+1 type hot rolling unit in a two-stage soaking mode, the thickness of the finished product is 10-11 mm through finish rolling, the total cold rolling processing rate is 80-91%, and the continuous air cushion annealing furnace is used for regulating and controlling the aspects of finished product annealing (O state) and the like, so that crystal grains are greatly refined, and the processing toughness of the wafer is improved.
The production method of the 3003 aluminum alloy deep-drawing wafer has the advantages of simple process, short flow, low energy consumption, low cost, and good deep-drawing performance and appearance quality.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited to the scope of the examples. These examples are intended to illustrate the invention only and are not intended to limit the scope of the invention. In addition, various modifications may occur to those skilled in the art upon reading the present disclosure, and such equivalent variations are within the scope of the present invention as defined in the appended claims.
Example 1
The production process of the 3003 aluminum alloy wafer product for the deep-drawing expansion type electric cooker liner produced by the aluminum alloy ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.25% of Si, 0.55% of Fe, 0.95% of Mn, 0.07% of Cu, 0.004% of Mg, 0.007% of Cr, 0.015% of Ti, 0.02% of Zn and the balance of Al and inevitable impurities.
(2) Smelting and slag drawing: smelting, refining and slag-drawing the ingredients in the step 1 to obtain molten aluminum alloy; specifically, in this example, the temperature range of melting, refining, and slag removal was 720 ℃, and the melt was stirred.
(3) Casting: casting the aluminum alloy melt in the step 2 into a rectangular ingot blank; the casting temperature in this example was 680 ℃, the casting speed was 30mm/min, the water pressure was 0.3Mpa, and the specifications of the obtained ingot were: 650 x 1200 x 5000 mm.
(4) Milling a surface: and (4) symmetrically milling the cast ingot obtained in the step (3), wherein the milling depth of the surface of the cast ingot is 16 mm.
(5) Homogenizing: carrying out homogenization heat treatment on the cast ingot subjected to surface milling, wherein the soaking process comprises the following steps: the first stage is 620 ℃/10h, and the furnace is cooled to 445 ℃; the second stage is 445 deg.C/8 h, and then directly discharged from the furnace for air cooling.
(6) Hot rolling: and (2) carrying out hot rough rolling and hot finish rolling on the cast ingot subjected to the homogenization heat treatment by a 1+1 type hot rolling unit, wherein the initial rolling temperature of the hot rough rolling is 530 ℃, the transfer thickness is 19.5mm, the offline thickness of the hot finish rolling is 10.5mm, and the final rolling temperature is 335 ℃.
(7) Cold rolling: and (4) cold rolling for 4 times until the thickness of the finished product is 2.0mm, wherein the total cold rolling reduction rate is 81%.
(8) And (3) carrying out finished product annealing (O state) by using an air cushion type continuous annealing furnace: furnace gas temperature 460 ℃, strip heat treatment speed: 30 m/min.
(9) Punching: the falling speed is 30 pieces/min;
the grain size of the final wafer product is one-fold lower, and the average grain size is 25 mu m.
Example 2
The production process of the 3003 aluminum alloy wafer product for the deep-drawing expansion type electric cooker liner produced by the aluminum alloy ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.26% of Si, 0.58% of Fe, 0.95% of Mn, 0.07% of Cu, 0.003% of Mg, 0.005% of Cr, 0.017% of Ti, 0.018% of Zn, and the balance of Al and unavoidable impurities.
(2) Smelting and slag drawing: smelting, refining and slag-drawing the ingredients in the step 1 to obtain molten aluminum alloy; specifically, in this example, the temperature of melting, refining, and slag removal was 735 ℃, and the melt was stirred.
(3) Casting: casting the aluminum alloy melt in the step 2 into a rectangular ingot blank; the casting temperature in this example was 688 ℃, the casting speed was 32mm/min, the water pressure was 0.32Mpa, and the ingot specification obtained was: 700 x 1500 x 5500 mm.
(4) Milling a surface: and (4) symmetrically milling the cast ingot obtained in the step (3), wherein the milling depth of the surface of the cast ingot is 19 mm.
(5) Homogenizing: carrying out homogenization heat treatment on the cast ingot subjected to surface milling, wherein the soaking process comprises the following steps: the first stage is 622 ℃/10h, and the temperature is cooled to 448 ℃ along with the furnace; the second stage is 448 ℃/8h, and then the product is directly discharged from the furnace for air cooling.
(6) Hot rolling: and (3) carrying out hot rough rolling and hot finish rolling on the cast ingot after the homogenization heat treatment, wherein the initial rolling temperature of the hot rough rolling is 530 ℃, the transfer thickness is 19.0mm, the offline thickness of the hot finish rolling is 10.9mm, and the final rolling temperature is 350 ℃.
(7) Cold rolling: and (4) cold rolling for 3 times until the thickness of a finished product is 1.2mm, wherein the total cold rolling reduction rate is 89%.
(8) Air cushion type continuous annealing furnace: furnace gas temperature 450 ℃, strip heat treatment speed: 20 m/min.
(9) Punching: the speed of falling slices is 25 slices/min;
the grain size of the final wafer product is first order of magnitude, and the average grain size is 32 μm.
Example 3
The production process of the 3003 aluminum alloy wafer product for the deep-drawing expansion type electric cooker liner produced by the aluminum alloy ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.28% of Si, 0.65% of Fe, 0.88% of Mn, 0.08% of Cu, 0.0045% of Mg, 0.009% of Cr, 0.024% of Ti, 0.026% of Zn, and the balance of Al and inevitable impurities.
(2) Smelting and slag drawing: smelting, refining and slag-drawing the ingredients in the step 1 to obtain molten aluminum alloy; specifically, in this example, the temperature range of melting, refining, and slag removal was 745 ℃, and the melt was stirred.
(3) Casting: casting the aluminum alloy melt in the step 2 into a rectangular ingot blank; the casting temperature in this example was 668 deg.C, the casting speed was 35mm/min, and the water pressure was 0.28 MPa. The specification of the obtained cast ingot is as follows: 750 x 2300 x 6500 mm.
(4) Milling a surface: and (4) symmetrically milling the cast ingot obtained in the step (3), wherein the milling depth of the surface of the cast ingot is 20 mm.
(5) Homogenizing: carrying out homogenization heat treatment on the cast ingot subjected to surface milling, wherein the soaking process comprises the following steps: the first stage 608 ℃/10h is cooled to 442 ℃ along with the furnace; the second stage is 442 ℃/8h, and then the product is directly discharged from the furnace for air cooling.
(6) Hot rolling: and (3) carrying out hot rough rolling and hot finish rolling on the ingot subjected to the homogenization heat treatment, wherein the initial rolling temperature of the hot rough rolling is 520 ℃, the transfer thickness is 19.8mm, the offline thickness of the hot finish rolling is 10.3mm, and the final rolling temperature is 345 ℃.
(7) Cold rolling: and (4) cold rolling for 4 times until the thickness of the finished product is 1.8mm, wherein the total cold rolling reduction rate is 82%.
(8) Air cushion type continuous annealing furnace: furnace gas temperature 445 ℃, strip heat treatment speed: 35 m/min.
(9) Punching: the speed of falling slices is 40 slices/min;
the grain size of the final wafer product is one order of magnitude lower, and the average grain size is 22 μm.
Example 4
The production process of the 3003 aluminum alloy wafer product for the deep-drawing expansion type electric cooker liner produced by the aluminum alloy ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.2% of Si, 0.5% of Fe, 0.7% of Mn, 0.05% of Cu, 0% of Cr, 0.01% of Ti, 0% of Zn, 0.005% of Mg, and the balance of Al and inevitable impurities.
(2) Smelting and slag drawing: smelting, refining and slag-drawing the ingredients in the step 1 to obtain molten aluminum alloy; specifically, in this example, the temperature of melting, refining, and slag removal was 720 ℃, and the melt was stirred.
(3) Casting: casting the aluminum alloy melt in the step 2 into a rectangular ingot blank; the casting temperature in this example was 680 deg.C, the casting speed was 30mm/min, and the water pressure was 0.3 MPa. The specification of the obtained cast ingot is as follows: 650 x 1200 x 5000 mm.
(4) Milling a surface: and (4) symmetrically milling the cast ingot obtained in the step (3), wherein the milling depth of the surface of the cast ingot is 16 mm.
(5) Homogenizing: carrying out homogenization heat treatment on the cast ingot subjected to surface milling, wherein the soaking process comprises the following steps: the first stage is 605 ℃/9h, and the furnace is cooled to 435 ℃; the second stage is 440 ℃/9h, and then the product is directly discharged from the furnace for air cooling.
(6) Hot rolling: and (3) carrying out hot rough rolling and hot finish rolling on the cast ingot after the homogenization heat treatment, wherein the initial rolling temperature of the hot rough rolling is 500 ℃, the transfer thickness is 18mm, the offline thickness of the hot finish rolling is 10mm, and the final rolling temperature is 330 ℃.
(7) Cold rolling: and (4) cold rolling for 4 times until the thickness of the finished product is 1mm, wherein the total cold rolling reduction rate is 90%.
(8) Air cushion type continuous annealing furnace: furnace gas temperature 420 ℃, strip heat treatment speed: 20 m/min.
(9) Punching: the falling speed is 30 pieces/min;
the grain size of the final wafer product is first order of magnitude, and the average grain size is 28 μm.
Example 5
The production process of the 3003 aluminum alloy wafer product for the deep-drawing expansion type electric cooker liner produced by the aluminum alloy ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.3% of Si, 0.7% of Fe, 1.0% of Mn, 0.10% of Cu, 0.01% of Cr, 0.025% of Ti, 0.03% of Zn, 0.002% of Mg, and the balance of Al and inevitable impurities.
(2) Smelting and slag drawing: smelting, refining and slag-drawing the ingredients in the step 1 to obtain molten aluminum alloy; specifically, in this example, the temperature of melting, refining, and slag removal was 720 ℃, and the melt was stirred.
(3) Casting: casting the aluminum alloy melt in the step 2 into a rectangular ingot blank; the casting temperature in this example was 680 deg.C, the casting speed was 30mm/min, and the water pressure was 0.3 MPa. The specification of the obtained cast ingot is as follows: 750 x 2300 x 6500 mm.
(4) Milling a surface: and (4) symmetrically milling the cast ingot obtained in the step (3), wherein the milling depth of the surface of the cast ingot is 16 mm.
(5) Homogenizing: carrying out homogenization heat treatment on the cast ingot subjected to surface milling, wherein the soaking process comprises the following steps: the first stage is 625 ℃/9.5h, and the temperature is cooled to 455 ℃ along with the furnace; the second stage is 460 ℃/8.5h, and then directly discharged from the furnace for air cooling.
(6) Hot rolling: and (3) carrying out hot rough rolling and hot finish rolling on the cast ingot after the homogenization heat treatment, wherein the initial rolling temperature of the hot rough rolling is 530 ℃, the transfer thickness is 20mm, the offline thickness of the hot finish rolling is 11mm, and the final rolling temperature is 350 ℃.
(7) Cold rolling: and (4) cold rolling for 4 times until the thickness of the finished product is 1.5mm, wherein the total cold rolling reduction rate is 86.4%.
(8) Air cushion type continuous annealing furnace: furnace gas temperature 480 ℃, strip heat treatment speed: 40 m/min.
(9) Punching: the falling speed is 30 pieces/min;
the grain size of the final wafer product is first order of magnitude, and the average grain size is 26 μm.
The invention can greatly refine crystal grains, improve the processing toughness of the wafer and meet the market demand.
Comparative example 1
In the comparative example 1, the weight content of Mg is adjusted based on the example 5, a series of Mg content values are set, the influence of the Mg content on the performance of the obtained product is examined, other raw materials and process parameters are kept unchanged, and the performance of the product prepared from the raw materials with different Mg contents is shown in the following table 1:
TABLE 1 influence of Mg content on the Properties of the products obtained
| Mg content by weight | 0.003％ | 0.004％ | 0.005％ | 0.006％ | 0.007％ | 0.008％ | 0.01％ |
| Average size of crystal grains | 27μm | 28μm | 32μm | 45μm | 48μm | 50μm | 56μm |
As shown in the table, when the Mg content is 0.002-0.005%, the grain size is less than or equal to 32 μm and can be maintained in a small range, and when the Mg content is more than 0.005%, the average size of the grain size is rapidly increased, so that the Mg content in the raw materials needs to be strictly controlled to ensure the processing toughness of the finally obtained product.
Claims (7)
1. A production method of 3003 aluminum alloy wafers for deep-drawing expansion type electric cooker liners is characterized by comprising the following steps:
1) smelting and casting an aluminum alloy ingot, wherein the aluminum alloy ingot comprises the following chemical components in percentage by mass:
0.2 to 0.3% of Si, 0.5 to 0.7% of Fe, 0.7 to 1.0% of Mn, 0.05 to 0.10% of Cu, 0 to 0.01% of Cr, 0.01 to 0.025% of Ti, 0 to 0.03% of Zn, 0.002 to 0.005% of Mg, and the balance of Al and unavoidable impurities;
2) and carrying out homogenization treatment, hot rolling, cold rolling, annealing and sheet punching on the aluminum alloy ingot obtained in the step 1) to obtain an aluminum alloy finished product.
2. The production method of the 3003 aluminum alloy wafer for the deep-drawing expansion type electric cooker liner according to claim 1, wherein the homogenization treatment in the step 2) adopts a two-stage soaking mode, wherein the first-stage soaking temperature is 615 +/-10 ℃, the heat preservation time is 9-10 h, and the wafer is cooled to 445 +/-10 ℃ along with a furnace; wherein the second-stage soaking temperature is 450 +/-10 ℃, the heat preservation time is 8-9 h, and the product is discharged from the furnace and cooled in air.
3. The production method of the 3003 aluminum alloy wafer for the deep-drawing expansion type electric cooker liner according to claim 1, wherein the hot rolling start temperature in the step 2) is 500-530 ℃, and the finish rolling temperature is 330-350 ℃.
4. The production method of the 3003 aluminum alloy wafer for the deep-drawing expansion type electric cooker liner according to claim 3, wherein the hot rolling in the step 2) comprises hot rough rolling and hot finish rolling, the hot rough rolling transfer thickness is 18-20 mm, and the thickness of the lower line after the hot finish rolling is 10-11 mm.
5. The production method of the 3003 aluminum alloy wafer for the deep-drawing expansion type electric cooker liner according to claim 1, wherein the thickness of the finished product obtained by the cold rolling in the step 2) is 1.0-2.0 mm.
6. The production method of the 3003 aluminum alloy wafer for the deep-drawing expansion type electric cooker liner according to claim 1, wherein the temperature of the furnace gas for annealing in the step 2) is 420-480 ℃.
7. The production method of the 3003 aluminum alloy wafer for the deep-drawing expansion type electric cooker liner according to claim 6, wherein the annealing strip heat treatment speed is 20-40 m/min.
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