GB2473050A - An aluminium-silicon-iron-beryllium alloy - Google Patents
An aluminium-silicon-iron-beryllium alloy Download PDFInfo
- Publication number
- GB2473050A GB2473050A GB0915071A GB0915071A GB2473050A GB 2473050 A GB2473050 A GB 2473050A GB 0915071 A GB0915071 A GB 0915071A GB 0915071 A GB0915071 A GB 0915071A GB 2473050 A GB2473050 A GB 2473050A
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- United Kingdom
- Prior art keywords
- weight
- alloy
- aluminum
- silicon
- beryllium
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/003—Aluminium alloys
-
- 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
-
- 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
-
- 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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
An aluminum alloy for manufacturing closures and caps for packaging which comprises (by weight): 0.4-1.0 % silicon, 0.35-1.2 % iron, 0.02-0.1 % beryllium, up to 0,15 % manganese, up to 0.15 % magnesium, up to 0.1 % copper, up to 0.1 % zinc, up to 0.1 % titanium, with the balance being aluminum and unavoidable slight impurities and where the weight ratio of beryllium Be to titanium Ti is in the range of 0.6-2.0 and the weight ratio of iron to silicon is in the range of 0.9-1.1. Strip is made by forming the alloy in a melting furnace 110, pouring it into a foundry furnace 112, refining and filtering 125, continuously casting into strip of thickness 3-10 mm by feeding between two rollers 115 and 116 internally cooled by water and then coiling the cast strip.
Description
ALUMINUM ALLOY AND METHOD FOR MANUFACTURING OF AN
ALUMINUM ALLOY
Description
The object of the invention is an aluminum alloy, in particular for manufacturing of closures and caps by drawing, in particular for packaging industry, and a method for manufacturing of an aluminum alloy.
Aluminum alloys, due to their properties, especially ductility, are widely used for manufacturing of metal containers. Properties of alloys depend on their chemical composition as well as the method of their manufacturing. One of the alloys of a known and typical composition, the 8011A type defined by a Polish standard PN-EN573, comprises, in addition to aluminum, additives of silicon Si at 0,4 -0,8 % by weight, ferrum Fe at 0,5 -1,0 % by weight and admixtures of manganese Mn, magnesium Mg, copper Cu, chromium Cr, each at 0,1 % by weight.
Properties of aluminum alloys depend in particular on the chemical composition of a solution and on the crystal composition and structure, mainly the amount and distribution of intermetallic diffusions at grain boundaries. Typical processes of continuous casting (in short CC) of known aluminum alloys provide alloys having a dendritic structure, which defines the high alloy heterogeneity, diverse amount of diffusions and their distribution. Such a structure of the material affects the end properties of a product, typically a rolled strip. The differences in microcrystal structure lead to large differences in plasticity and strength properties of known alloys.
Another aluminum alloy, the 7475 type, known from a Polish patent specification PL 194380 entitled "METHOD FOR OBTAINING AN ALUMINUM ALLOY OF 7475 TYPE IN A SUPERPLASTIC STATE HAVING A FORM OF A BILLET", comprises, apart from aluminum, admixtures of Zinc Zn at 5,85 % by weight, copper Cu at 1,65 % by weight, magnesium Mg at 2,4 % by weight, zirconium Zr at 0,4 % by weight, as well as silicon Si and ferrum Fe at less than 0,1 % by weight. In order to improve the properties of the alloy in the superplastic state, the alloy is subject to thermo-chemical processing, wherein the processing comprises a step of homogenization at temperatures of 480-520°C ended by hyper-quenching in water at room temperature, a step of age hardening at 380- 420°C ended by hyper-quenching in water at room temperature, a step of plastic straining with heating and ended by a step of recrystalisation of the strained sample in a salt furnace at 470-490°C.
The alloys described above do not meet the requirements for alloys to be used for manufacturing of closures and caps by deep drawing.
As a result of performed trials, it has unexpectedly appeared that by modifying the chemical composition of the 8011A alloy it is possible to obtain a new aluminum alloy, which is the object of the present invention and is characterized by good mechanical properties, homogenous structure, good drawability, low horizontal anisotropy index, which are particularly advantageous for the deep drawing processes, as well as stability of the mentioned properties after thermal treatment related to drying of lacquers.
The aluminum alloy according to the present invention comprises, apart from aluminum Al, silicon Si at 0,4 -1,0 % by weight, ferrum Fe at 0,35-1,2 % by weight, beryllium Be at 0,02 -0,1 % by weight, manganese Mn at up to 0,15 % by weight, magnesium Mg at up to 0,15 % by weight, copper Cu at up to 0,1 % by weight, Zinc Zn at up to 0,1 % by weight, titanium Ti at up to 0,1 % by weight, whereas the ratio of percentages by weight of beryllium Be to titanium Ti [Be/Ti] is in the range of 0,6 to 2,0 and the ratio of percentages by weight of ferrum Fe to silicon Si [Fe,Si] is in the range of 0,9 to 1,1.
The object of the present invention is also a method for manufacturing of an aluminum alloy, based on a technology of continuous casting of strip, comprising the steps of, in a melting furnace, melting input material comprising aluminum and additives by changing their weight and controlling composition of the alloy up to a moment when an alloy is obtained that comprises silicon Si at 0,4 -1,0 % by weight, ferrum Fe at 0,35-1,2 % by weight, beryllium Be at 0,02 -0,1 % by weight, manganese Mn at up to 0,15 % by weight, magnesium Mg at up to 0,15 % by weight, copper Cu at up to 0,1 % by weight, Zinc Zn at up to 0,1 % by weight, titanium Ti at up to 0,1 % by weight and the remaining part comprising aluminum and unavoidable slight impurities, whereas the ratio of percentages by weight of beryllium Be to titanium Ti [Be/Ti] is in the range of 0,6 to 2,0 and the ratio of percentages by weight of ferrum Fe to silicon Si [Fe,Si] is in the range of 0,9 to 1,1, pouring the alloy to a foundry furnace, refining and filtering the alloy and casting strips in a continuous casting apparatus, by feeding the liquid alloy from an input nozzle between two rollers cooled by water from the inside.
Preferably the strip is rolled up into a roll.
Preferably the rollers are situated such that the distance between their casings is 3-10 mm.
The object of the present invention is shown in a preferred embodiment on a drawing, in which Fig. 1 shows a diagram of a manufacturing cycle of a strip of aluminum alloy with a continuous strip casting apparatus, and Fig. 2a and 2b present photographs of cast microstructure of tested samples whereas Fig. 2a shows a photograph of cast microstructure of a sample of the alloy according to the present invention and Fig. 2b shows a cast microstructure of a sample of aluminum alloy type 8011A.
Alloys based on aluminum comprise, according to the present invention, silicon Si at 0,4 -1,0 % by weight, ferrum Fe at 0,35-1,2 % by weight, beryllium Be at 0,02 -0,1 % by weight, manganese Mn at up to 0,15 % by weight, magnesium Mg at up to 0,15 % by weight, copper Cu at up to 0,1 % by weight, Zinc Zn at up to 0,1 % by weight, titanium Ti at up to 0,1 % by weight and the remaining part comprising aluminum Al and unavoidable slight impurities, whereas the ratio of percentages by weight of beryllium Be to titanium Ti [Be/Ti] is in the range of 0,6 to 2,0 and the ratio of percentages by weight of ferrum Fe to silicon Si [Fe,Si] is in the range of 0,9 to 1,1.
The composition of the ingredients of the alloy according to the present invention provides to the aluminum alloy the characteristic properties of a globular cast structure, which results from its new chemical composition. The effect of alloy crystallization in a globular state, in the presence of alloy strengthening elements such as Si, Fe, Mg, Mn and admixtures, guarantees uniform distribution of insoluble elements in a form of slight intermetallic phases at boundaries of grains created as a result of crystallization. Due to the created globular structure, when the alloy is processed to an end product in form of a rolled strip, the effect of solution strengthening and age hardening is achieved, while maintaining high plasticity and good thermal resistance.
The cycle of production of the aluminum alloy comprising, apart from aluminum, silicon Si at 0,4 -1,0 % by weight, ferrum Fe at 0,35-1,2 % by weight, beryllium Be at 0,02 -0,1 % by weight, manganese Mn at up to 0,15 % by weight, magnesium Mg at up to 0,15 % by weight, copper Cu at up to 0,1 % by weight, Zinc Zn at up to 0,1 % by weight, titanium Ti at up to 0,1 % by weight, whereas the ratio of percentages by weight of beryllium Be to titanium Ti [Be/Ti] is in the range of 0,6 to 2,0 and the ratio of percentages by weight of ferrum Fe to silicon Si [Fe,Si] is in the range of 0,9 to 1,1, is based on continuous casting of a strip having a thickness of 3 -10 mm and comprises melting 1 21, in a melting furnace 110, the input material 101, alloying 122 with the use of a metallic master alloy 102 in order to obtain predefined chemical composition, controlling 123 of the chemical composition by means of a spectral analysis apparatus 111, pouring 124 the alloy 103 to a foundry furnace 112, refining and filtering 125, casting 126 a strip 104 having a thickness of 3-10 mm by a continuous casting apparatus 113 by feeding a liquid alloy 105 from an input nozzle 114 between two rollers 115, 116 which are cooled by water 117 from the inside. The last step of strip 126 manufacturing is rolling up of the strip into a roll 127.
When the material passes between the rollers, the liquid aluminum alloy crystallizes in certain zones, as in a typical casting process, but work hardening occurs as well, as in a typical rolling process. As a result, a material of a modified structure is created, which has its micro-and macrostructural properties similar to a material obtained in a typical hot rolling method. The present casting technology is unique in that it involves both solidification and rolling in a single stage.
Embodiment 1 Fig. 2a presents a microcrystalic structure of one of aluminum alloys according to the present invention, which comprises silicon Si at 0,885 % by weight, ferrum Fe at 0,977 % by weight, beryllium Be at 0,045 % by weight, manganese Mn at 0,080 % by weight, magnesium Mg at 0,081 % by weight, copper Cu at 0,033 % by weight, Zinc Zn at 0,027 % by weight, titanium Ti at up to 0,050 % by weight and remaining ingredients being aluminum Al and unavoidable slight impurities.
In turn, Fig. 2b presents microcrystalic structure of a standard aluminum alloy of type 801 1A defined by Polish standard PN -EN 573, wherein the alloy comprises silicon Si at 0,652 % by weight, ferrum Fe at 0,774 % by weight, beryllium Be at 0,045 % by weight, manganese Mn at 0,083 % by weight, magnesium Mg at 0,064 % by weight, copper Cu at 0,025 % by weight, Zinc Zn at 0,031 % by weight, titanium Ti at up to 0,024 % by weight and remaining ingredients being aluminum Al and unavoidable slight impurities.
The above-described alloys have been sampled. Metallographic microsections were made from the samples for micrustructure analysis. Strips were produced from the samples by cold rolling with heat processing at strengthening between 40% and 80%.
Both samples were subject to hardness tests according to Polish standard PN-EN10002-1 wherein the samples had a form of stripes. Results of hardness tests of both alloys are presented in table 1.
Table 1. Mechanical properties Alloy type Rm [MPa] R02 [MPa] A50 [%] W[%] IE[mm] Present invention 160 142 4 0,6 4,2 8011A 145 135 3 1,1 3,9 wherein Rm -tensile strength -apparent yield point A50 -relative elongation W -horizontal an isotropy index 1E20 -drawability -Erichsen index In turn, the hardness results of both samples after thermal treatment, simulating lacquer drying according to Polish standard PN-EN541, are presented
in table 2.
Table 2. Mechanical properties after thermal treatment Alloy type Rm [MPa] R02 [MPa] A50 [%] W[%] 1E20[rnrn] Present invention 0,8 alloy 152 135 6 5,6 Type 8OllAalloy 125 105 6 1,5 4,9 As shown in the tables above, the mechanical properties of the strip made of the alloy according to the present invention are superior to mechanical properties of the strip made of the 8011A type alloy. The tensile strength is increased by about 20%, the apparent plasticity boundary by about 28%, the plasticity 1E20 by about 14% and the horizontal anisotropy index by about 46%. In addition, it was found that the aluminum alloy according to the present invention has very good drawability properties, while maintaining high hardness and stability of these properties after thermal treatment related to drying of lacquers during the process of manufacturing of caps.
Claims (4)
- Claims 1. An aluminum alloy, especially for manufacturing of closures and caps, characterised in that it comprises silicon Si at 0,4 -1,0 % by weight, ferrum Fe at 0,35-1,2 % by weight, beryllium Be at 0,02 -0,1 % by weight, manganese Mn at up to 0,15 % by weight, magnesium Mg at up to 0,15 % by weight, copper Cu at up to 0,1 % by weight, Zinc Zn at up to 0,1 % by weight, titanium Ti at up to 0,1 % by weight and the remaining part comprising aluminum Al and unavoidable slight impurities, whereas the ratio of percentages by weight of beryllium Be to titanium Ti [Be/Ti] is in the range of 0,6 to 2,0 and the ratio of percentages by weight of ferrum Fe to silicon Si [Fe,Si] is in the range of 0,9 to 1,1.
- 2. A method for manufacturing of an aluminum alloy, based on a technology of continuous casting of strip, characterized in that it comprises the steps of: -in a melting furnace, melting input material comprising aluminum and additives by changing their weight and controlling composition of the alloy up to a moment when an alloy is obtained that comprises silicon Si at 0,4 - 1,0 % by weight, ferrum Fe at 0,35-1,2 % by weight, beryllium Be at 0,02 - 0,1 % by weight, manganese Mn at up to 0,15 % by weight, magnesium Mg at up to 0,15 % by weight, copper Cu at up to 0,1 % by weight, Zinc Zn at up to 0,1 % by weight, titanium Ti at up to 0,1 % by weight and the remaining part comprising aluminum and unavoidable slight impurities, whereas the ratio of percentages by weight of beryllium Be to titanium Ti [Be/Ti] is in the range of 0,6 to 2,0 and the ratio of percentages by weight of ferrum Fe to silicon Si [Fe,Si] is in the range of 0,9 to 1,1, -pouring the alloy to a foundry furnace -refining and filtering the alloy -casting strips in a continuous casting apparatus, by feeding the liquid alloy from an input nozzle to between two rollers cooled by water from the inside.
- 3. The method according to claim 2, further comprising the step of rolling the strip up into a roll.
- 4. The method according to claim 2, wherein the rollers are situated such that the distance between their casings is 3-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0915071A GB2473050B (en) | 2009-08-29 | 2009-08-29 | Aluminium alloy and method for manufacturing of an aluminium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0915071A GB2473050B (en) | 2009-08-29 | 2009-08-29 | Aluminium alloy and method for manufacturing of an aluminium alloy |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0915071D0 GB0915071D0 (en) | 2009-09-30 |
| GB2473050A true GB2473050A (en) | 2011-03-02 |
| GB2473050B GB2473050B (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0915071A Expired - Fee Related GB2473050B (en) | 2009-08-29 | 2009-08-29 | Aluminium alloy and method for manufacturing of an aluminium alloy |
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| Country | Link |
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| GB (1) | GB2473050B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102756116A (en) * | 2012-07-19 | 2012-10-31 | 重庆硕龙科技有限公司 | Method for integration implementation of continuously melting, refining and quantitatively positioning pouring of aluminum alloy furnace burden |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115948684B (en) * | 2022-12-21 | 2024-06-07 | 广东领胜新材料科技有限公司 | High-strength high-conductivity aluminum alloy wire and manufacturing method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB711860A (en) * | 1950-07-03 | 1954-07-14 | Aluminum Co Of America | Improvements in or relating to wrought aluminous metal articles |
| GB711859A (en) * | 1950-07-03 | 1954-07-14 | Aluminum Co Of America | Improvements in or relating to process of producing aluminous metal extrusions |
| US2826518A (en) * | 1953-07-09 | 1958-03-11 | Aluminum Co Of America | Aluminum base alloy article |
| GB1475587A (en) * | 1973-07-23 | 1977-06-01 | Southwire Co | High iron aluminum alloy |
| JPS59156550A (en) * | 1983-02-23 | 1984-09-05 | Sumitomo Electric Ind Ltd | Manufacturing method of thin aluminum alloy wire |
| JPH02282495A (en) * | 1989-04-24 | 1990-11-20 | Sumitomo Light Metal Ind Ltd | Production of aluminum alloy material forming stable bluish gray anodic oxide film |
| JP2003082426A (en) * | 2001-09-12 | 2003-03-19 | Fuji Photo Film Co Ltd | Supporting body for lithographic printing plate and lithographic printing original plate |
| US20030124364A1 (en) * | 2001-09-12 | 2003-07-03 | Hirokazu Sawada | Support for lithographic printing plate and presensitized plate |
-
2009
- 2009-08-29 GB GB0915071A patent/GB2473050B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB711860A (en) * | 1950-07-03 | 1954-07-14 | Aluminum Co Of America | Improvements in or relating to wrought aluminous metal articles |
| GB711859A (en) * | 1950-07-03 | 1954-07-14 | Aluminum Co Of America | Improvements in or relating to process of producing aluminous metal extrusions |
| US2826518A (en) * | 1953-07-09 | 1958-03-11 | Aluminum Co Of America | Aluminum base alloy article |
| GB1475587A (en) * | 1973-07-23 | 1977-06-01 | Southwire Co | High iron aluminum alloy |
| JPS59156550A (en) * | 1983-02-23 | 1984-09-05 | Sumitomo Electric Ind Ltd | Manufacturing method of thin aluminum alloy wire |
| JPH02282495A (en) * | 1989-04-24 | 1990-11-20 | Sumitomo Light Metal Ind Ltd | Production of aluminum alloy material forming stable bluish gray anodic oxide film |
| JP2003082426A (en) * | 2001-09-12 | 2003-03-19 | Fuji Photo Film Co Ltd | Supporting body for lithographic printing plate and lithographic printing original plate |
| US20030124364A1 (en) * | 2001-09-12 | 2003-07-03 | Hirokazu Sawada | Support for lithographic printing plate and presensitized plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102756116A (en) * | 2012-07-19 | 2012-10-31 | 重庆硕龙科技有限公司 | Method for integration implementation of continuously melting, refining and quantitatively positioning pouring of aluminum alloy furnace burden |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0915071D0 (en) | 2009-09-30 |
| GB2473050B (en) | 2014-02-19 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20180829 |