CN111020250A - Production method of 3005 aluminum alloy wafer for electric cooker liner - Google Patents
Production method of 3005 aluminum alloy wafer for electric cooker liner Download PDFInfo
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- CN111020250A CN111020250A CN201911316734.XA CN201911316734A CN111020250A CN 111020250 A CN111020250 A CN 111020250A CN 201911316734 A CN201911316734 A CN 201911316734A CN 111020250 A CN111020250 A CN 111020250A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- 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 3005 aluminum alloy wafers for an electric cooker liner, belonging to the technical field of alloy materials. A production method of 3005 aluminum alloy wafers for electric cooker liners comprises the following steps: 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, 0.4 to 0.5% of Fe, 0.8 to 0.9% of Mn, 0 to 0.12% of Cu, 0 to 0.03% of Cr, 0 to 0.03% of Ti, 0 to 0.1% of Zn, 0.35 to 0.45% of Mg, and the balance of Al and unavoidable impurities; and carrying out homogenization treatment, hot rolling, cold rolling, annealing and punching on the obtained aluminum alloy ingot to obtain an aluminum alloy finished product. The production method of the 3005 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 3005 aluminum alloy wafers for an 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 industry due to the advantages of light weight, good cold processing performance, gorgeous color and luster after surface anodic oxidation and the like. At present, a large amount of wafer products are exported to Japanese and American high-end deep pots, 3005 alloy products with higher strength are generally adopted, compared with 3003 alloy, 3005 products are harder, and good processing performance and surface quality are more difficult to ensure.
The conventional process has the following disadvantages: the aluminum alloy texture is softer, and industrial production process easily appears the surface grazing, and the surface is rougher, dull, and the impression is relatively poor, and the pot body durability is poor after the deep-drawing to follow-up anodic oxidation film thickness is low, and the wire drawing line is easily appeared in the deep-drawing process.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a production method of a 3005 aluminum alloy wafer for an electric cooker liner, so as to obtain a wafer product with hard texture and good surface quality.
The purpose of the invention is realized by the following technical scheme:
a production method of 3005 aluminum alloy wafers for 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, 0.4 to 0.5% of Fe, 0.8 to 0.9% of Mn, 0 to 0.12% of Cu, 0 to 0.03% of Cr, 0 to 0.03% of Ti, 0 to 0.1% of Zn, 0.35 to 0.45% 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 proportion of the furnace feeding return materials for smelting in the step 1) is less than 10%.
Preferably, the size of the ingot obtained in the step 1) is 650-750 × 1200-2300 × 5000-6500 mm.
Preferably, the ingot casting temperature of the homogenization treatment in the step 2) is 610 +/-10 ℃, the heat preservation time is 9-10 hours, the ingot casting temperature is cooled to 200 +/-10 ℃ along with the furnace, and the ingot casting is taken out of the furnace and air-cooled.
Preferably, the hot rolling start temperature in the step 2) is 500-530 ℃, and the finish rolling temperature is 240-300 ℃.
Preferably, the hot rolling in the step 2) comprises hot rough rolling and hot finish rolling, wherein the transfer thickness of the hot rough rolling is 20-23 mm, the roughness of a working roll of the hot rough rolling is Ra2.0-3.0 mu m, the roughness of a working roll of the hot finish rolling is Ra2.0-3.0 mu m, and the thickness of an off-line strip is 6-10 mm.
Preferably, the working roll used in the cold rolling in the step 2) has a roughness Ra2.0-3.0 μm.
Preferably, the thickness of the finished product obtained by the cold rolling in the step 2) is 2.0-3.0 mm.
Preferably, the temperature of furnace gas for annealing in the step 2) is 150-200 ℃, the temperature of the material to be annealed is raised to 140 +/-10 ℃, the temperature is kept for 6-12 h, the temperature of the furnace gas is raised to 330-380 ℃, the temperature of the material to be annealed is raised to 300-330 ℃, and the temperature is kept for 4-8 h.
By strictly controlling the proportion of chemical components of the cast ingot to the return material, and simultaneously controlling the finish rolling temperature and the off-line cooling mode, the roughness of the cold rolling roller and the cooling mode of the box type annealing furnace, crystal grains are greatly refined, the subsequent drawing toughness of the 3005 alloy wafer is improved, wire drawing lines are not easy to appear in the drawing process, the surface quality of a drawing pot is improved, the durability of the drawing pot is ensured, and the thickness of the subsequent anodic oxidation film is high.
The production method of the 3005 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 wafer product produced by the aluminum alloy hot rolling ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.25% of Si, 0.42% of Fe, 0.81% of Mn, 0.06% of Cu, 0.01% of Cr, 0 to 0.025% of Ti, 0.04% of Zn, 0.38% of Mg, and the balance of Al and inevitable impurities, wherein the proportion of primary returns (such as slab ingots, hot rolled coils, and cold rolled coils are not used) is 5%.
(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; in this example, the casting temperature was 682 ℃, the casting speed was 40mm/min, and the water flow rate was 22m 3/hr. Specification of ingot casting: 660 × 1260 × 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 18 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 ingot casting temperature is 615 ℃/9.5h, the ingot casting temperature is cooled to 201 ℃ along with the furnace, and then the ingot is 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 500 ℃, the transfer thickness is 21.2mm, the roughness of a hot rough rolling working roll is Ra2.65 mu m, the hot finish rolling is carried out for 3 times, the roughness of a hot finish rolling working roll is Ra2.55 mu m, the offline thickness of the hot finish rolling is 6.95mm, and the final rolling temperature is 295 ℃. And (4) after the hot finish rolling is off line, slowly cooling the steel plate to room temperature in the air, measuring the temperature to be 25 ℃, and then performing cold rolling.
(7) Cold rolling: the roughness of the cold rolling working roll is 2.55 mu m, the thickness of the finished product is 3.0mm after 3 passes, and the total cold rolling processing rate is 57 percent.
(8) And (3) annealing the finished product by adopting a box-type annealing furnace: the temperature of furnace gas is 165 ℃, the temperature of the material is kept for 8 hours after the temperature of the material is raised to 145 ℃, then the temperature of the furnace gas is raised to 340 ℃, the temperature of the material is kept for 5 hours after the temperature of the material is raised to 320 ℃, and the coiled material is naturally cooled to 25 ℃ in the air after being discharged.
(9) Punching: the speed of falling slices is 20 slices/min;
the surface crystal grains of the final wafer product are equiaxial crystals, the grain size is lower by one order, and the average size of the crystal grains is 36 mu m.
Example 2
The production process of the wafer product produced by the aluminum alloy hot rolling ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.22% of Si, 0.49% of Fe, 0.88% of Mn, 0.04% of Cu, 0.02% of Cr, 0-0.022% of Ti, 0.01% of Zn, 0.44% of Mg, and the balance of Al and inevitable impurities, wherein the proportion of the primary return is 7%.
(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 715 ℃, and the melt was stirred.
(3) Casting: casting the aluminum alloy melt in the step 2 into a rectangular ingot blank; in this example, the casting temperature was 678 ℃, the casting speed was 38mm/min, and the water flow rate was 25m 3/hr. Specification of ingot casting: 680 x 2200 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 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 ingot casting temperature is 618 ℃/10h, the ingot casting temperature is cooled to 195 ℃ along with the furnace, and then the ingot is 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 homogenization heat treatment by a 1+1 type hot rolling unit, wherein the starting temperature of the hot rough rolling is 520 ℃, the transfer thickness is 22mm, the roughness of a hot rough rolling working roll is Ra2.4 mu m, the hot finish rolling is carried out for 3 times, the roughness of a hot finish rolling working roll is Ra2.5 mu m, the offline thickness of the hot finish rolling is 8.2mm, and the finishing temperature is 285 ℃. And (4) after the hot finish rolling is off line, slowly cooling the steel plate to room temperature in the air, measuring the temperature to be 22 ℃, and then performing cold rolling.
(7) Cold rolling: the roughness of the cold rolling working roll is 2.35 mu m, the thickness of the finished product is 3mm after 3 passes, and the total cold rolling processing rate is 63 percent.
(8) Annealing in a box furnace: the temperature of furnace gas is 195 ℃, the temperature of the material is kept for 7 hours after the temperature of the material is raised to 135 ℃, then the temperature of the furnace gas is raised to 355 ℃, the temperature of the material is kept for 6 hours after the temperature of the material is raised to 330 ℃, and the coiled material is naturally cooled to 22 ℃ in the air after being discharged.
(9) Punching: the speed of falling slices is 25 slices/min;
the crystal grains on the surface of the final wafer product are equiaxial crystals, the grain size is lower by one order, and the average size of the crystal grains is 28 mu m.
Example 3
The production process of the wafer product produced by the aluminum alloy hot rolling ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.2% of Si, 0.4% of Fe, 0.8% of Mn, 0% of Cu, 0% of Cr, 0% of Ti, 0% of Zn, 0.35% of Mg, and the balance of Al and inevitable impurities, wherein the proportion of primary return (such as slab ingot, hot rolled coil, and cold rolled coil cannot be used) is 6%.
(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; in this example, the casting temperature was 680 ℃, the casting speed was 40mm/min, and the water flow rate was 22m 3/hr. Specification of ingot casting: 650X 1200X 5000 mm.
(4) Milling a surface: and (4) symmetrically milling the cast ingot obtained in the step (3), wherein the milling depth of the example is 12mm of a single surface.
(5) Homogenizing: carrying out homogenization heat treatment on the cast ingot subjected to surface milling, wherein the soaking process comprises the following steps: the ingot casting temperature is 600 ℃/9h, the ingot casting temperature is cooled to 190 ℃ along with the furnace, and then the ingot is 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 homogenization heat treatment by a 1+1 type hot rolling unit, wherein the initial rolling temperature of the hot rough rolling is 500 ℃, the transfer thickness is 20mm, the roughness of a hot rough rolling working roll is Ra2.0 mu m, the hot finish rolling is carried out for 3 times, the roughness of a hot finish rolling working roll is Ra2.0 mu m, the offline thickness of the hot finish rolling is 6mm, and the final rolling temperature is 240 ℃. And (4) after the hot finish rolling is off line, slowly cooling the steel plate to room temperature in the air, measuring the temperature to be 25 ℃, and then performing cold rolling.
(7) Cold rolling: the roughness of the cold rolling working roll is 2 mu m, the thickness of the finished product is 2.5mm after 3 passes, and the total cold rolling processing rate is 58%.
(8) And (3) annealing the finished product by adopting a box-type annealing furnace: keeping the temperature for 6h after the temperature of the material rises to 130 ℃ under the furnace gas temperature of 150 ℃, then increasing the temperature of the furnace gas to 330 ℃, keeping the temperature for 4h after the temperature of the material reaches 300 ℃, and naturally cooling the coil discharged from the furnace to 25 ℃ in the air.
(9) Punching: the speed of falling slices is 20 slices/min;
the surface crystal grains of the final wafer product are equiaxial crystals, the grain size is lower by one order, and the average size of the crystal grains is 30 mu m.
Example 4
The production process of the wafer product produced by the aluminum alloy hot rolling ingot comprises the following production steps:
(1) the preparation method comprises the following steps of: 0.3% of Si, 0.5% of Fe, 0.9% of Mn, 0.12% of Cu, 0.03% of Cr, 0.03% of Ti, 0.1% of Zn, 0.45% of Mg, and the balance of Al and inevitable impurities, wherein the proportion of primary return materials (such as flat ingots and hot rolled coils, and cold rolled coils cannot be used) is 8%.
(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; in this example, the casting temperature was 680 ℃, the casting speed was 40mm/min, and the water flow rate was 22m 3/hr. Specification of ingot casting: 750X 2300X 6500 mm.
(4) Milling a surface: and (4) symmetrically milling the cast ingot obtained in the step (3), wherein the milling depth of the example is 12mm of a single surface.
(5, homogenizing treatment, namely homogenizing heat treatment is carried out on the cast ingot after the surface is milled, and the soaking process is that the temperature of the cast ingot is 620 ℃/10h, the cast ingot is cooled to 210 ℃ along with the furnace, and then the cast ingot is directly taken out of 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 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 23mm, the roughness of a hot rough rolling working roll is Ra3.0 mu m, the hot finish rolling is carried out for 3 passes, the roughness of a hot finish rolling working roll is Ra3.0 mu m, the off-line thickness of the hot finish rolling is 10mm, and the final rolling temperature is 300 ℃. And (4) after the hot finish rolling is off line, slowly cooling the steel plate to room temperature in the air, measuring the temperature to be 25 ℃, and then performing cold rolling.
(7) Cold rolling: the roughness of the cold rolling working roll is 3 mu m, the thickness of the finished product is 2mm after 3 passes, and the total cold rolling processing rate is 80 percent.
(8) And (3) annealing the finished product by adopting a box-type annealing furnace: keeping the temperature for 12h after the temperature of the material rises to 150 ℃ under the furnace gas temperature of 200 ℃, then increasing the temperature of the furnace gas to 380 ℃, keeping the temperature for 8h after the temperature of the material reaches 330 ℃, and naturally cooling the coil discharged from the furnace to 25 ℃ in the air.
(9) Punching: the speed of falling slices is 20 slices/min;
the surface crystal grains of the final wafer product are equiaxial crystals, the grain size is lower by one order, and the average size of the crystal grains is 32 mu m.
The 3005 aluminum alloy obtained by the invention has fine crystal grains, further improves the processing toughness of the wafer and meets the market demand.
Claims (9)
1. A production method of 3005 aluminum alloy wafers for an electric cooker liner 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, 0.4 to 0.5% of Fe, 0.8 to 0.9% of Mn, 0 to 0.12% of Cu, 0 to 0.03% of Cr, 0 to 0.03% of Ti, 0 to 0.1% of Zn, 0.35 to 0.45% 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 method for producing 3005 aluminum alloy wafers for the inner container of an electric cooker as claimed in claim 1, wherein the proportion of furnace return materials for smelting in step 1) is less than 10%.
3. The production method of 3005 aluminum alloy wafers for the inner container of an electric cooker as claimed in claim 2, wherein the size of the ingot obtained in step 1) is 650 to 750 x 1200 to 2300 x 5000 to 6500 mm.
4. The production method of 3005 aluminum alloy wafers for the inner container of an electric cooker as claimed in claim 1, wherein the ingot casting temperature of the homogenization treatment in the step 2) is 610 +/-10 ℃, the holding time is 9-10 h, the wafers are cooled to 200 +/-10 ℃ along with the furnace, and the wafers are discharged from the furnace and cooled.
5. The method for producing the 3005 aluminum alloy wafer for the inner container of the electric cooker as claimed in claim 1, wherein the hot rolling start temperature in the step 2) is 500 to 530 ℃ and the finish rolling temperature is 240 to 300 ℃.
6. The production method of 3005 aluminum alloy wafers for the inner container of an electric cooker as claimed in claim 1, wherein the hot rolling in step 2) comprises hot rough rolling and hot finish rolling, wherein the hot rough rolling transfer thickness is 20 to 23mm, the hot rough rolling work roll roughness is 2.0 to 3.0 μm, the hot finish rolling work roll roughness is 2.0 to 3.0 μm, and the thickness of the lower line strip is 6 to 10 mm.
7. The production method of the 3005 aluminum alloy wafer for the inner container of the electric cooker as claimed in claim 1, wherein the roughness of the work roll used in the cold rolling in the step 2) is Ra2.0-3.0 μm.
8. The production method of 3005 aluminum alloy wafers for the inner container of an electric cooker as claimed in claim 7, wherein the thickness of the finished product obtained by the cold rolling in the step 2) is 2.0-3.0 mm.
9. The production method of 3005 aluminum alloy wafers for the inner container of an electric cooker as claimed in claim 1, wherein the temperature of the furnace gas for annealing in step 2) is 150-200 ℃, the temperature of the materials to be annealed is raised to 140 ± 10 ℃, the temperature is kept for 6-12 h, the temperature of the furnace gas is raised to 330-380 ℃, the temperature of the materials to be annealed is raised to 300-330 ℃, and the temperature is kept for 4-8 h.
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| CN109972001A (en) * | 2019-03-29 | 2019-07-05 | 郑州明泰实业有限公司 | A kind of capacitor case 1100-O state aluminium alloy strips and its production method |
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- 2019-12-19 CN CN201911316734.XA patent/CN111020250B/en active Active
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| EP1316623A1 (en) * | 2001-11-28 | 2003-06-04 | Hydro Aluminium Deutschland GmbH | Aluminium alloy for the production of products obtained by roll forming |
| US20050139296A1 (en) * | 2001-11-28 | 2005-06-30 | Reiner Markert | Aluminum alloy for producing roll-shaped products |
| CN101225491A (en) * | 2007-01-18 | 2008-07-23 | 株式会社神户制钢所 | Aluminum alloy sheet |
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| CN107406921A (en) * | 2015-03-13 | 2017-11-28 | 诺维尔里斯公司 | Aluminium alloy for highly moulding encapsulating products and preparation method thereof |
| CN108118201A (en) * | 2017-12-22 | 2018-06-05 | 中铝西南铝冷连轧板带有限公司 | A kind of coachbuilt body column plaque 3005 aluminum alloy base materials and its production method |
| CN109972001A (en) * | 2019-03-29 | 2019-07-05 | 郑州明泰实业有限公司 | A kind of capacitor case 1100-O state aluminium alloy strips and its production method |
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