A method for preparing 5-series aluminum alloy can lid material
By optimizing hot rolling and cold rolling processes and filtration methods, the problems of low rolling power and low efficiency of 5-series aluminum alloy can lid materials were solved, achieving efficient and stable production of aluminum alloy can lid materials and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN ZHONGWANG ALUMINUM IND CO LTD
- Filing Date
- 2024-12-11
- Publication Date
- 2026-05-26
AI Technical Summary
The existing methods for preparing 5-series aluminum alloy can lid materials have low rolling success rate, low rolling efficiency, and unstable finished product quality, which cannot meet the demands of market competition.
The hot rolling and cold rolling processes are optimized. Hot roughing and five-stand hot continuous rolling are used to achieve a product thickness of 2.1-2.2 mm with a final rolling temperature of 315-335℃. Cold rolling is carried out under three-stand cold continuous rolling to 0.32-0.36 mm, followed by single-stand rolling to achieve a product thickness of 0.218-0.224 mm. Al-5Ti-0.2B is used for online refining treatment, and plate and deep bed filtration are combined to reduce the slag content of the melt and ensure the purity of the melt.
It improved the rolling power and efficiency of 5-series aluminum alloy can lid stock, reduced production costs, reduced waste, and improved the stability of finished product quality.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of aluminum alloy preparation and processing, and specifically relates to a method for preparing 5-series aluminum alloy can lid material. Background Technology
[0002] The main alloying element of 5-series aluminum alloys is magnesium, which has good processing performance, corrosion resistance, weldability and high strength, making it the preferred material for can lids.
[0003] Currently, the cold rolling process for 5-series aluminum alloy can lids requires 5-6 passes, which is time-consuming, costly, inefficient, and produces a lot of waste, failing to meet the demands of fierce market competition.
[0004] In summary, there is an urgent need for a method to prepare 5-series aluminum alloy can lid material with high rolling success rate, high rolling efficiency, and stable finished product quality. Summary of the Invention
[0005] The present invention aims to solve the technical problems of low rolling success rate, low rolling efficiency, and unstable finished product quality in the preparation method of 5-series aluminum alloy can lid material.
[0006] To achieve the above objectives, the first aspect of the present invention provides a method for preparing 5-series aluminum alloy can lid material, wherein the preparation method includes: batching, melting, refining, filtering, casting, sawing and milling, heating, hot rolling, cold rolling, cleaning, trimming, straightening, and packaging.
[0007] The hot rolling conditions include: first, hot roughing, which takes 21-23 passes, followed by five-stand hot continuous rolling to a product thickness of 2.1-2.2 mm, with a final rolling temperature of 315-335℃;
[0008] The conditions for cold rolling include: first, three-stand continuous cold rolling to 0.32-0.36mm, then single-stand rolling, with a cold-rolled product thickness of 0.218-0.224mm.
[0009] A second aspect of the present invention provides an aluminum alloy can lid material prepared by the above-described preparation method.
[0010] Beneficial effects: The rolling preparation method disclosed in this invention has high rolling success rate, high rolling efficiency, and stable finished product quality. Detailed Implementation
[0011] The endpoints and any values of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoint values of the various ranges, the endpoint values of the various ranges and individual point values, and individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.
[0012] The existing technology for preparing 5-series aluminum alloy can lids requires 5-6 cold rolling processes, which is time-consuming, costly, inefficient, and produces a lot of waste.
[0013] In this invention, the inventors discovered that by optimizing the hot rolling and cold rolling processes, the preparation method of 5-series aluminum alloy can lid material can achieve high rolling success rate, high rolling efficiency, and stable finished product quality.
[0014] Therefore, the first aspect of the present invention provides a method for preparing 5-series aluminum alloy can lid material, wherein the preparation method includes: batching, melting, refining, filtering, casting, sawing and milling, heating, hot rolling, cold rolling, cleaning, edge trimming, straightening, and packaging;
[0015] The hot rolling conditions include: first, hot roughing, which takes 21-23 passes, followed by five-stand hot continuous rolling to a product thickness of 2.1-2.2 mm, with a final rolling temperature of 315-335℃;
[0016] The conditions for cold rolling include: first, three-stand continuous cold rolling to 0.32-0.36mm, then single-stand rolling, with a cold-rolled product thickness of 0.218-0.224mm.
[0017] In this invention, the preparation method is optimized, which improves the production efficiency of 5-series aluminum alloy can stock, shortens the auxiliary time of coil rolling, saves one or two rolling scraps, increases the yield, reduces production costs, and accelerates metal turnover.
[0018] Furthermore, the alloy temper of the aluminum alloy can stock is 5182-H19.
[0019] According to the present invention, the cold rolling conditions further include: the processing rates of the three-stand cold rolling are 55-58%, 40-42% and 36-38% respectively, and the processing rate of the single stand is 33-39%.
[0020] According to the present invention, the components and their weight percentages in the aluminum alloy can lid material are as follows: Si content ≤ 0.12%, Fe content 0.20-0.30%, Cu content ≤ 0.12%, Mg content 4.75-4.90%, Zn content ≤ 0.03%, Cr content 0.02-0.04%, Ni content ≤ 0.05%, Ti content 0.008-0.02%, Mn content 0.35-0.45%, single impurity content ≤ 0.05%, total impurity content ≤ 0.15%, and the balance being Al.
[0021] According to the present invention, the smelting conditions include a smelting temperature of 720-760°C.
[0022] According to the present invention, the refining conditions include a refining temperature of 710-760°C.
[0023] According to the present invention, the filtration adopts a plate-type CFF filtration followed by a deep bed filtration or a tubular filtration.
[0024] In this invention, the above-mentioned filtration method can reduce the slag content of the melt and ensure the purity of the melt.
[0025] In this invention, Al-5Ti-0.2B is used for online grain refinement to ensure the grain size of the aluminum alloy ingot.
[0026] According to the present invention, the casting conditions include a casting temperature of 665-705°C.
[0027] According to the present invention, the heating conditions include: a heating time of 2-3 hours and a heating metal temperature of 500-520°C.
[0028] A second aspect of the present invention provides an aluminum alloy can lid material prepared by the above-described preparation method.
[0029] Test methods
[0030] Tensile mechanical properties (tensile strength, specified non-proportional elongation strength, elongation after fracture) are measured according to GB / T 16865.
[0031] The technical solution of the present invention will be further described in detail below with reference to the embodiments. Obviously, the embodiments described herein are only some embodiments of the present invention and are not intended to limit the present invention. All other embodiments implemented by those skilled in the art based on the embodiments of the present invention without creative improvements are within the protection scope of the present invention.
[0032] Example 1
[0033] The composition of the 5182 aluminum alloy can lid material by mass fraction is as follows: Si: 0.059%, Fe: 0.264%, Cu: 0.09%, Mg: 4.825%, Zn: 0.005%, Cr: 0.023%, Ni: 0.004%, Ti: 0.0016%, Mn: 0.408%, with individual impurities ≤0.05%, total ≤0.15%, and the balance being Al.
[0034] The melting temperature was 745℃, and the refining temperature was 735℃. CFF filtration and deep bed filtration were used, and the casting temperature was 678℃. The sawing and milling of the ingot head resulted in a sawing margin of 360mm; the large-face milling margin was 12mm. The flat ingots after sawing and milling were heated to 500℃ and held for 2 hours. First, hot roughing was performed in 21 passes, followed by continuous hot rolling on a 5-stand mill to a finished thickness of 2.1mm, with a final rolling temperature of 324℃. Cold rolling was performed in a three-stand continuous mill with intermediate edge trimming. The cold rolling mill pass allocation and process parameters are shown in Table 1.
[0035] Table 1
[0036]
[0037] The rolled aluminum alloy coil is stretched, bent, straightened, and cleaned with an elongation of 0.7% and a cleaning temperature of 65℃. The cleaned and straightened aluminum alloy coil is then cut into finished product specifications to obtain aluminum alloy can lid material A1.
[0038] Example 2
[0039] The composition of the 5182 aluminum alloy can lid material by mass fraction is as follows: Si: 0.049%, Fe: 0.262%, Cu: 0.092%, Mg: 4.815%, Zn: 0.005%, Cr: 0.026%, Ni: 0.004%, Ti: 0.0016%, Mn: 0.416%, with individual impurities ≤0.05%, total ≤0.15%, and the balance being Al.
[0040] The melting temperature was 749℃, and the refining temperature was 742℃. CFF filtration and deep bed filtration were used, and the casting temperature was 680℃. The sawing and milling of the ingot head resulted in a sawing margin of 350mm; the large-face milling margin was 12mm. The flat ingots after sawing and milling were heated to 510℃ and held for 3 hours. First, hot roughing was performed in 21 passes, followed by continuous hot rolling on a 5-stand mill to a finished thickness of 2.15mm, with a final rolling temperature of 330℃. Cold rolling was performed in a three-stand continuous mill with edge trimming in the middle. The cold rolling mill pass allocation and process parameters are shown in Table 2.
[0041] Table 2
[0042]
[0043] The rolled aluminum alloy coil is stretched, bent, straightened, and cleaned with an elongation of 0.7% and a cleaning temperature of 65℃. The cleaned and straightened aluminum alloy coil is then cut into finished product specifications to obtain aluminum alloy can lid material A2.
[0044] Comparative Example 1
[0045] The composition of the 5182 aluminum alloy can lid material by mass fraction is as follows: Si: 0.057%, Fe: 0.26%, Cu: 0.092%, Mg: 4.829%, Zn: 0.005%, Cr: 0.03%, Ni: 0.004%, Ti: 0.018%, Mn: 0.404%, with individual impurities ≤0.05%, total ≤0.15%, and the balance being Al.
[0046] The melting temperature was 746℃, and the refining temperature was 738℃. CFF filtration and deep bed filtration were used, and the casting temperature was 678℃. The sawing and milling of the ingot head resulted in a sawing margin of 365mm; the large-face milling margin was 12mm. The flat ingots after sawing and milling were heated to 500℃ and held for 3 hours. First, hot roughing was performed in 21 passes, followed by continuous hot rolling on a 5-stand mill to a finished thickness of 2.5mm, with a final rolling temperature of 325℃. Cold rolling was performed in six passes, with edge trimming in the middle. Cold rolling mill options included four passes per stand, five passes per stand, and six passes per stand. The cold rolling mill pass allocation and process parameters are shown in Table 3.
[0047] Table 3
[0048]
[0049] The rolled aluminum alloy coil is stretched, bent, straightened, and cleaned with an elongation of 0.7% and a cleaning temperature of 65℃. The cleaned and straightened aluminum alloy coil is then cut into finished product specifications to obtain aluminum alloy can lid material DA1.
[0050] Comparative Example 2
[0051] The composition of the 5182 aluminum alloy can lid material by mass fraction is as follows: Si: 0.057%, Fe: 0.26%, Cu: 0.092%, Mg: 4.829%, Zn: 0.005%, Cr: 0.03%, Ni: 0.004%, Ti: 0.018%, Mn: 0.404%, with individual impurities ≤0.05%, total ≤0.15%, and the balance being Al.
[0052] The melting temperature was 746℃, and the refining temperature was 732℃. CFF filtration and deep bed filtration were used, and the casting temperature was 682℃. The sawing allowance for the ingot head during milling was 365mm; the milling allowance for the large face was 12mm. The flat ingot after milling was heated to 500℃ and held for 3 hours. It was first hot-rolled in 21 passes, then continuously hot-rolled on a 5-stand mill to a finished thickness of 2.5mm, with a final rolling temperature of 327℃. Cold rolling consisted of six passes, three consecutive cold rolling runs with intermediate edge trimming, and single-stand cold rolling with four, five, and six passes. The cold rolling mill pass allocation and process parameters are shown in Table 4.
[0053] Table 4
[0054]
[0055] The rolled aluminum alloy coil is stretched, bent, straightened, and cleaned with an elongation of 0.7% and a cleaning temperature of 65℃. The cleaned and straightened aluminum alloy coil is then cut into finished product specifications to obtain aluminum alloy can lid material DA2.
[0056] The performance and production indicators of A1-A2 and DA1-DA2 are shown in Table 5.
[0057] Table 5
[0058]
[0059]
[0060] As shown in Table 5 above, the aluminum alloy can lid materials prepared in Examples 1 and 2 have comparable mechanical properties to those prepared in Comparative Examples 1 and 2, and other indicators meet the requirements. The number of production steps is reduced, efficiency is improved, and production costs are reduced.
[0061] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A method for preparing a 5-series aluminum alloy can lid material, characterized in that, The preparation method includes: batching, smelting, refining, filtering, casting, sawing and milling, heating, hot rolling, cold rolling, cleaning, trimming, straightening, and packaging; The hot rolling conditions include: first, hot roughing, which takes 21-23 passes, followed by five-stand hot continuous rolling to a product thickness of 2.1-2.2 mm, with a final rolling temperature of 315-335℃; The conditions for cold rolling include: first, continuous cold rolling in three stands to 0.32-0.36 mm, and then single-stand preparation, with a cold-rolled product thickness of 0.218-0.224 mm; The cold rolling conditions also include: the processing rates of the three-stand cold rolling mill are 55-58%, 40-42% and 36-38% respectively, and the processing rate of the single stand is 33-39%; The components and their weight percentages in the aluminum alloy can lid material are as follows: Si content ≤ 0.12%, Fe content 0.20-0.30%, Cu content ≤ 0.12%, Mg content 4.75-4.90%, Zn content ≤ 0.03%, Cr content 0.02-0.04%, Ni content ≤ 0.05%, Ti content 0.008-0.02%, Mn content 0.35-0.45%, single impurity content ≤ 0.05%, total impurity content ≤ 0.15%, and the balance being Al.
2. The preparation method according to claim 1, characterized in that, The smelting conditions include: a smelting temperature of 720-760℃; The refining conditions include a refining temperature of 710-760℃.
3. The preparation method according to claim 1, characterized in that, The filtration process employs a combination of plate-type CFF filtration followed by deep-bed filtration or tubular filtration.
4. The preparation method according to claim 1, characterized in that, The casting conditions include a casting temperature of 665-705℃.
5. The preparation method according to claim 1, characterized in that, The heating conditions include: a heating time of 2-3 hours and a metal temperature of 500-520℃.
6. An aluminum alloy can lid material prepared by any one of claims 1-5.