CN113462936A - Aluminum alloy ring-pull can pull ring and processing technology thereof - Google Patents
Aluminum alloy ring-pull can pull ring and processing technology thereof Download PDFInfo
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- CN113462936A CN113462936A CN202111023812.4A CN202111023812A CN113462936A CN 113462936 A CN113462936 A CN 113462936A CN 202111023812 A CN202111023812 A CN 202111023812A CN 113462936 A CN113462936 A CN 113462936A
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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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
- B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
- B65D17/34—Arrangement or construction of pull or lift tabs
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Abstract
The invention discloses an aluminum alloy ring-pull can and a processing technology thereof, the aluminum alloy ring-pull can is formed by punching 5182 aluminum alloy, and the 5182 aluminum alloy comprises the following elements in percentage by weight: si is less than or equal to 0.08 percent, Fe: less than or equal to 0.25%, Cu: less than or equal to 0.1 percent, Mn: 0.2-0.3%, Mg: 4.4-4.6%, Cr: less than or equal to 0.05 percent, Zn: less than or equal to 0.15 percent, less than or equal to 0.03 percent of other single impurities, less than or equal to 0.15 percent of total impurities and the balance of Al, and is prepared by casting, sawing and milling, soaking, hot rolling, cold rolling and stretch bending straightening processing. The 5182 aluminum alloy with the thickness of 0.22-0.35 mm prepared by the invention directly omits a baking process, shortens the construction period, reduces the fuel consumption, changes the rolling pass and the temperature, is easier to form and reduces the cracking risk when being applied to punching of the ring pull of the pop can, and has long storage time and low attenuation speed of strength and elongation after fracture.
Description
Technical Field
The invention belongs to the technical field of pop can packaging containers and aluminum alloy can material processing, and particularly relates to an aluminum alloy pop can pull ring and a processing technology thereof.
Background
With the comprehensive understanding, development and utilization of marine resources by human beings, marine aquaculture becomes a component in marine industry, and plays an important role in marine economic development. With the continuous deepening of fishery industry structures, the deep processing is carried out by utilizing marine fishery resources to form great advantages and characteristics. The canned aquatic product is made up by using fish and other aquatic products as raw material, cooking and dewatering, canning, adding flavouring material and sealing and sterilizing, and features no poison to human body, no pollution to food, good sealing performance, long storage period and good corrosion resistance.
The common canned container is made of plastic materials, glass materials or tinplate cans, the plastic materials are easy to react with components (such as salt) in the cans, glass products are easy to collide, the tinplate cans are inconvenient to carry, the tinplate cans cannot be reused, and the tinplate cans are difficult to recycle. At present, aluminum alloy is widely used for producing cans for packaging solid or liquid food grade carbonated beverages, the cans comprise two parts, a can body is integrated with a bottom surface, the side surface of the cans can be printed, and a cover with an easy-to-open system is connected with the can body.
5182 aluminum alloy is widely used for can lids and tab materials of cans because of its moderate strength, good corrosion resistance and excellent formability. The production process of the current 5182 film-coated tab material or DOS tab material is as follows: smelting → refining → casting → sawing and milling → heating → hot rolling (rough rolling, finish rolling) → cold rolling (middle trimming) → stretch bending and straightening → coating line/continuous annealing line baking → coating film/coating DOS oil, the process needs to bake the aluminum material before coating film or before coating DOS oil, and the main purpose is to reduce the cost and improve the quality of the aluminum productLow material strength and reduced cracking risk of the pull ring. But the performance of the tab material is greatly attenuated along with the long-time storage or the performance of the tab before and after forming, and the prior process has the advantages of complex procedure, long construction period, high production cost and reduced production profit. In addition, the roasting uses natural gas, which causes consumption of fossil fuels, and combustion releases a large amount of CO2And the greenhouse effect is increased.
In conclusion, the aluminum alloy pull material with excellent performance is researched and developed, and the material is of great significance in punching the pull ring of the pop can.
Disclosure of Invention
Aiming at the problems of complex procedures, high cost, high energy consumption, high strength of aluminum alloy materials in an unbaked normal state, easiness in cracking in a pull ring forming process, long-time storage of materials or high attenuation speed of the strength of the materials after the pull ring is formed in the prior art, the invention provides the aluminum alloy pull ring for the pop can and the processing technology thereof, the baking procedure of the prepared 5182 alloy material is omitted, and meanwhile, the raw material components, rolling passes and temperature are changed, so that the pull ring for the pop can is easier to form when being applied to punching of the pull ring for the pop can, the cracking risk is reduced, the storage time is long, and the attenuation speed of the strength and the elongation after breakage is low.
The invention is realized by the following technical scheme:
an aluminum alloy ring-pull can is formed by blanking 5182 aluminum alloy; the 5182 aluminum alloy comprises the following elements in percentage by weight: si: 0.06-0.07%, Fe: 0.18 to 0.20%, Cu: 0.05-0.06%, Mn: 0.23-0.25%, Mg: 4.43-4.55%, Cr: 0.025-0.035%, Zn: 0.09-0.109%, less than or equal to 0.03% of other single impurities, less than or equal to 0.15% of total impurities, and the balance of Al.
Further, the thickness of the 5182 aluminum alloy is 0.249-0.279 mm.
In the invention, the aluminum alloy ring-pull can pull ring is formed by punching 5182 aluminum alloy;
the processing method of the 5182 aluminum alloy comprises the following steps:
(1) casting: the formula comprises the following chemical components in percentage by weight: si: 0.06-0.07%, Fe: 0.18 to 0.20%, Cu: 0.05-0.06%, Mn: 0.23-0.25%, Mg: 4.43-4.55%, Cr: 0.025-0.035%, Zn: 0.09-0.109%, less than or equal to 0.03% of other single impurities, less than or equal to 0.15% of total impurities and the balance of Al, smelting, refining and casting into ingots;
(2) sawing and milling;
(3) soaking the raw materials: the ingot after sawing and milling is heated in a grading mode, the first section is heated to 400-420 ℃ and is kept warm for 2-3 hours, the second section is heated to 480-500 ℃ and is kept warm for 2-3 hours, a grading heating process is adopted, the precipitation of Mg element in the heating process is reduced, and the tissue overheating and the dissolution of a crystal boundary low-melting point compound caused by too fast heating are prevented;
(4) hot rolling: 1+4 hot continuous rolling is adopted, the ingot is processed to the thickness of 27mm after rough rolling for 27 passes, then finish rolling is carried out, the ingot is finely rolled into a strip with the thickness of 2.3mm, the hot rolling finishing temperature is 350 ℃, and the hot rolling speed is 400 m/min; by a hot rolling process, the number of cubic textures of the material is increased, the forming performance of the material is improved, the total cold rolling processing rate is reduced, the work hardening degree is reduced, and the room-temperature mechanical property of the material is reduced;
(5) cold rolling: rolling the hot-rolled strip with the thickness of 2.3mm for two times to obtain a semi-finished product with the thickness of 0.56-0.6 mm at the rolling speed of 600-800 m/min, and after trimming and cleaning the semi-finished product, continuously rolling for two times to obtain a finished product with the thickness of 0.249-0.279 mm at the rolling speed of 1000-1200 m/min;
(6) and (6) stretch bending and straightening.
Further, the smelting temperature in the step (1) is 750-760 ℃, the refining temperature is 740-750 ℃, the casting temperature is 680-700 ℃, the casting speed is 60mm/min, and the water temperature is 20-30 ℃.
Further, the sawing and milling in the step (2) is as follows: and sawing a cast ingot sprue by 50mm, sawing a dummy ingot head by 250mm, milling a large surface by 11mm, and milling a side surface by 9 mm.
Further, the total reduction rate of the cold rolling in the step (5) is 87.8-88.69%, and the outlet temperature of the cold rolling is 130-135 ℃.
Further, the thickness of the cast ingot after the sawing and milling in the step (2) is 618 mm.
Further, the stretch bending and straightening process in the step (6) comprises the following steps: straightening and trimming a cold-rolled finished product, degreasing the surface of the product by using alkali liquor, cleaning the product by using water at 60 ℃, repeatedly bending and deforming the cold-rolled strip by using a stretch bending straightening machine, prolonging the longitudinal tight area of the material, and ensuring that the wave height, the wave distance and the longitudinal warping of the material meet the requirements of a laminating or punching and pulling ring.
Advantageous effects
1) The 5182 aluminum alloy with the thickness of 0.249-0.279 mm prepared by the method directly omits a baking process, shortens the construction period, reduces the loss of fuel, electric power and manpower, reduces the emission of carbon dioxide, and is more environment-friendly;
2) the invention does not need baking, is easy to form and reduces the cracking risk when being applied to punching the ring-pull of the pop-top can by changing the alloy components, the rolling pass and the temperature, and has long storage time and low attenuation speed of the strength and the elongation percentage after breakage.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description is provided clearly and completely, and other similar embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application based on the embodiments in the present application.
Example 1
(1) Casting: chemical components: si: 0.07%, Fe: 0.20%, Cu: 0.06%, Mn: 0.25%, Mg: 4.43%, Cr: 0.035%, Zn: 0.109 percent of the total Al, less than or equal to 0.03 percent of other single impurities, less than or equal to 0.15 percent of the total Al, the smelting temperature of 750-760 ℃, the refining temperature of 740-750 ℃, the DC casting speed of 60mm/min, the casting temperature of 690 ℃, the water temperature of 20-30 ℃, and obtaining cast ingots after casting;
(2) sawing and milling: sawing a cast ingot gate by 50mm, sawing a dummy ingot head by 250mm, milling a large surface by 11mm, milling a side surface by 9mm, and sawing and milling to obtain a cast ingot with the thickness of 618 mm;
(3) soaking the raw materials: the ingot after sawing and milling is heated in stages, the first section is heated to 410 ℃ and is insulated for 3 hours, and the second section is heated to 490 ℃ and is insulated for 2 hours;
(4) hot rolling: 1+4 hot continuous rolling is used, the thickness of an ingot is 27mm after 27 rough rolling passes, then the ingot is finish rolled by a 4-frame continuous rolling mill, a strip with the thickness of 2.3mm is obtained after finish rolling, the final rolling temperature of hot rolling is 350 ℃, and the hot rolling speed is 400 m/min;
(5) cold rolling: and (3) rolling the hot-rolled strip with the thickness of 2.3mm to a semi-finished product with the thickness of 0.6mm by using a cold rolling mill, and distributing cold rolling passes: 2.3 → 1.1 (52.2%) → 0.6 (45.5%), the rolling speed is 600 m/min, the semi-finished product is subjected to edge cutting and alkali liquor cleaning, after surface grease is removed, the semi-finished product is rolled from the thickness of 0.6mm to a finished product with the thickness of 0.279mm by using cold rolling two-pass continuous rolling, and the cold continuous rolling distribution pass is 0.6 → 0.40 (33.3%) → 0.279 (30.2%); cold rolling speed: 1000m/min, cold rolling outlet temperature 130 ℃, cold rolling total reduction ratio: 87.8 percent;
(6) stretch bending and straightening: straightening and trimming a cold-rolled finished product, degreasing the surface of the product by using alkali liquor, cleaning the surface of the product by using 60 ℃ deionized water, repeatedly bending and deforming the cold-rolled strip by using a stretch bending straightening machine at the stretch bending straightening speed of 150 m/min, prolonging the longitudinal tight area of the material, and ensuring that the wave height, the wave distance and the longitudinal warping of the material meet the requirements of a laminating film or a punching and pulling ring.
Example 2
The steps (1) to (4) are the same as in example 1;
(5) cold rolling: the hot rolled strip with the thickness of 2.2mm is rolled to a semi-finished product with the thickness of 0.56mm by using cold rolling, and the cold rolling pass distribution is as follows: 2.2 → 1.1 (50%) → 0.56 (49%), wherein the rolling speed is 800m/min, the semi-finished product is subjected to edge cutting, alkali liquor cleaning and surface grease removal, then the semi-finished product is rolled from the thickness of 0.56mm to a finished product with the thickness of 0.249mm by using cold rolling two-pass continuous rolling, and the cold rolling distribution pass is 0.56 → 0.36 (35.7%) → 0.249 (30.8%); cold continuous rolling speed: 1200m/min, cold rolling outlet temperature 135 ℃, cold rolling total reduction ratio: 88.69 percent;
(6) stretch bending and straightening: and straightening and trimming the cold-rolled finished product, degreasing the surface of the product by using alkali liquor, and cleaning the product by using deionized water at the temperature of 60 ℃, wherein the stretch bending straightening speed is 150 m/min.
Example 3
The steps (1) to (4) are the same as in example 1;
(5) cold rolling: the hot rolled strip with the thickness of 2.2mm is rolled to a semi-finished product with the thickness of 0.258mm by using cold rolling, and the cold rolling pass distribution is as follows: 2.2 → 1.2 (45.5%) → 0.58 (51.7%), wherein the rolling speed is 700 m/min, the semi-finished product is subjected to trimming and alkali liquor cleaning, surface grease is removed, then the semi-finished product is rolled from the thickness of 0.58mm to a finished product with the thickness of 0.258mm by using cold rolling two-pass continuous rolling, and the cold continuous rolling distribution pass is 0.58 → 0.35 (39.7%) → 0.258 (26.3%); cold continuous rolling speed: 1100m/min, cold rolling outlet temperature of 135 ℃, and cold rolling total reduction ratio: 88.3 percent;
(6) stretch bending and straightening: and straightening and trimming the cold-rolled finished product, degreasing the surface of the product by using alkali liquor, and cleaning the product by using deionized water at the temperature of 60 ℃, wherein the stretch bending straightening speed is 150 m/min.
Example 4
(1) Casting: chemical components: si: 0.06%, Fe: 0.18%, Cu: 0.05%, Mn: 0.23%, Mg: 4.55%, Cr: 0.025%, Zn: 0.09 percent of other single impurities, less than or equal to 0.03 percent of other single impurities, less than or equal to 0.15 percent of the total impurities, and the balance of Al, wherein the smelting temperature is 750-760 ℃, the refining temperature is 740-750 ℃, the DC casting speed is 60mm/min, the casting temperature is 690 ℃, and the water temperature is controlled to be 20-30 ℃;
steps (2) to (6) are the same as those in example 1.
Comparative example 1
Changing and adjusting the chemical components cast in the step (1), wherein the adjusted components comprise the following components in percentage by weight: si: 0.11%, Fe: 0.254%, Cu: 0.075%, Mn: 0.44%, Mg: 4.76%, Cr: 0.034%, Zn: 0.160 percent, less than or equal to 0.03 percent of other single impurities, less than or equal to 0.15 percent in total, and the balance of Al, and the rest steps are the same as the steps in the embodiment 1.
Comparative example 2
The soaking process in the step (3) of example 1 was changed, and the soaking process was carried out at 490 ℃ for 5 hours, which was the same as example 1 in terms of the procedure and the parameter conditions.
Comparative example 3
(1) Casting: the molten aluminum has the same chemical composition as that of comparative example 1, the smelting temperature is 750-760 ℃, the refining temperature is 740-750 ℃, the DC casting speed is 60mm/min, the casting temperature is 690 ℃, the water temperature is 20-30 ℃, and cast ingots are obtained after casting;
(2) sawing and milling: same as example 1;
(3) soaking the raw materials: heating the ingot after sawing and milling to 490 ℃, and preserving heat for 5 hours;
(4) hot rolling: 1+4 hot continuous rolling is used, the thickness of an ingot is 31mm after 29 passes of rough rolling, then the ingot is finish rolled by a 4-frame continuous rolling mill, a strip with the thickness of 2.7mm is obtained after finish rolling, the final rolling temperature of hot rolling is 340 ℃, and the hot rolling speed is 400 m/min;
(5) single-frame cold rolling: rolling the hot rolled strip from the thickness of 2.7mm to a semi-finished product with the thickness of 0.6mm by using a single frame in three passes, and distributing cold rolling passes: 2.7 → 1.62 (40%) → 0.98 (39.5%) → 0.6 (38.7%), after trimming and alkali cleaning of the semi-finished product and removal of surface grease, rolling the semi-finished product from the thickness of 0.6mm to a finished product with the thickness of 0.279mm by using a single-stand cold rolling two-pass process, wherein the cold rolling distribution pass is 0.6 → 0.38 (36.6%) → 0.279 (26.6%), and the single-stand cold rolling speed: 800m/min, cold rolling outlet temperature 98 ℃, and cold rolling total reduction ratio: 89.67 percent;
(6) stretch bending and straightening: the same as in example 1.
Comparative example 4
The steps (1) to (6) are the same as the comparative example 3, except that the baking step is added after the stretch bending and straightening in the step (6): the baking speed is 60m/min, and the furnace gas temperature is 200 ℃.
Testing and analyzing the performance of the aluminum alloy finished product:
(1) the finished product performances (tensile strength, yield strength and elongation after fracture) of the 5182 aluminum alloy pull ring materials prepared in examples 1-4 and comparative examples 1-4 were tested, and the results are shown in the following table 1: as can be seen from Table 1, by improving the process and the material components of the invention, the strength and the elongation after fracture of the aluminum alloy material can meet the requirements of the pull ring on strength and cap making, and the elongation after fracture is improved, so that the pull ring is not easy to crack, and the yield is improved;
TABLE 15182 tensile Strength, yield Strength, and elongation after Break of aluminum alloys
(2) The 5182 aluminum alloy pull ring materials prepared in the examples 1-4 and the comparative examples 1-4 are placed for 6 months under the same condition, and then the performances (tensile strength, yield strength and elongation after fracture) of the aluminum alloy are detected, and the results are shown in the following table 2, and the table 2 shows that the prepared 5182 aluminum alloy has the same attenuation speed of the strength and the elongation at break as the aluminum alloy baked by the traditional process without baking by changing the alloy components, rolling passes and temperature;
TABLE 2 tensile strength, yield strength and elongation after fracture of 5182 aluminum alloy after 6 months of storage
(3) The method omits a baking process, the baking production speed of domestic equipment is 30-80 m/min, calculated by the thickness of 0.279mm and the width of 1600mm, 10.3-27.6 min can be saved for each ton of rolls, 1717-4600 working hours can be saved for one million tons in a year, and about 30m is consumed for each ton of aluminum by natural gas3The natural gas per ton is 3.6 yuan, and 108 million yuan can be saved by ten thousand tons per year. The power consumption of each ton of aluminum is 100 kW.h, 0.5 yuan is consumed in each kW.h, and 50 yuan can be saved by one thousand tons in one year. The labor is 20 yuan per hour, generally 4 persons are needed, more than 13.7 ten thousand can be saved when ten thousand tons are produced in one year, more than comprehensive, and more than 171.7 ten thousand can be saved when one thousand tons are produced in one year; in addition, ten thousand tons of natural gas need to consume 30 ten thousand square parts every year, one part of the natural gas can generate 1.76kg of carbon dioxide, and one thousand tons of natural gas per year can reduce the emission of greenhouse gas of 528 tons, thereby making a positive contribution to carbon neutralization.
Claims (8)
1. An aluminum alloy ring-pull can pull ring is characterized in that the aluminum alloy ring-pull can pull ring is formed by punching 5182 aluminum alloy;
the 5182 aluminum alloy comprises the following elements in percentage by weight: si: 0.06-0.07%, Fe: 0.18 to 0.20%, Cu: 0.05-0.06%, Mn: 0.23-0.25%, Mg: 4.43-4.55%, Cr: 0.025-0.035%, Zn: 0.09-0.109%, less than or equal to 0.03% of other single impurities, less than or equal to 0.15% of total impurities, and the balance of Al.
2. The aluminum alloy ring pull of claim 1, wherein the 5182 aluminum alloy has a thickness of 0.249-0.279 mm.
3. The method for processing the aluminum alloy ring-pull can pull ring of claim 1 or 2, wherein the aluminum alloy ring-pull can pull ring is formed by punching 5182 aluminum alloy;
the processing method of the 5182 aluminum alloy comprises the following steps:
(1) casting: the formula comprises the following chemical components in percentage by weight: si: 0.06-0.07%, Fe: 0.18 to 0.20%, Cu: 0.05-0.06%, Mn: 0.23-0.25%, Mg: 4.43-4.55%, Cr: 0.025-0.035%, Zn: 0.09-0.109%, less than or equal to 0.03% of other single impurities, less than or equal to 0.15% of total impurities and the balance of Al, smelting, refining and casting into ingots;
(2) sawing and milling;
(3) soaking the raw materials: the ingot after sawing and milling is heated in a grading way, the first section is heated to 400-420 ℃ and is kept warm for 2-3 h, and the second section is heated to 480-500 ℃ and is kept warm for 2-3 h;
(4) hot rolling: 1+4 hot continuous rolling is adopted, the ingot is processed to the thickness of 27mm after rough rolling for 27 passes, then finish rolling is carried out, the ingot is finely rolled into a strip with the thickness of 2.3mm, the hot rolling finishing temperature is 350 ℃, and the hot rolling speed is 400 m/min;
(5) cold rolling: rolling the hot-rolled strip with the thickness of 2.3mm for two times to obtain a semi-finished product with the thickness of 0.56-0.6 mm at the rolling speed of 600-800 m/min, and after trimming and cleaning the semi-finished product, continuously rolling for two times to obtain a finished product with the thickness of 0.249-0.279 mm at the rolling speed of 1000-1200 m/min;
(6) and (6) stretch bending and straightening.
4. The processing method of the aluminum alloy ring-pull can pull ring according to claim 3, wherein the melting temperature in the step (1) is 750-760 ℃, the refining temperature is 740-750 ℃, the casting temperature is 680-700 ℃, the casting speed is 60mm/min, and the water temperature is 20-30 ℃.
5. The method for processing the pull ring of the aluminum alloy easy open can of claim 3, wherein the sawing and milling in the step (2) is as follows: and sawing a cast ingot sprue by 50mm, sawing a dummy ingot head by 250mm, milling a large surface by 11mm, and milling a side surface by 9 mm.
6. The method for processing the aluminum alloy ring-pull can pull ring according to claim 3, wherein the total cold rolling reduction rate in the step (5) is 87.8-88.69%, and the cold rolling outlet temperature is 130-135 ℃.
7. The method for processing the pull ring of the aluminum alloy easy open can of claim 3, wherein the thickness of the cast ingot after the sawing and milling in the step (2) is 618 mm.
8. The processing method of the aluminum alloy ring-pull can pull ring according to claim 3, wherein the stretch bending straightening process in the step (6) comprises the following steps: straightening and trimming the cold-rolled finished product, degreasing the surface of the product by using alkali liquor, and cleaning the product by using water at the temperature of 60 ℃.
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| CN114457264A (en) * | 2022-01-28 | 2022-05-10 | 邹平宏发铝业科技有限公司 | 5-series aluminum alloy strip for stamping lamp and processing method thereof |
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| CN105755333A (en) * | 2016-03-17 | 2016-07-13 | 中铝科学技术研究院有限公司 | Preparation method of aluminum alloy plate for thin cover of zip-top can |
| CN106834825A (en) * | 2016-11-16 | 2017-06-13 | 广西南南铝加工有限公司 | 5182 aluminium alloys and the aluminium alloy are prepared into the process of cover material strip material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457264A (en) * | 2022-01-28 | 2022-05-10 | 邹平宏发铝业科技有限公司 | 5-series aluminum alloy strip for stamping lamp and processing method thereof |
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| CN113462936B (en) | 2021-11-16 |
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