CN104962786A - Corrosion-resistant aluminum alloy profile - Google Patents
Corrosion-resistant aluminum alloy profile Download PDFInfo
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- CN104962786A CN104962786A CN201510321524.5A CN201510321524A CN104962786A CN 104962786 A CN104962786 A CN 104962786A CN 201510321524 A CN201510321524 A CN 201510321524A CN 104962786 A CN104962786 A CN 104962786A
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Abstract
The invention discloses a production method of a corrosion-resistant aluminum alloy profile. The corrosion-resistant aluminum alloy profile comprises, by mass percent, 3%-8% of Cu, 2%-5% of Fe, 5%-9% of Mn, 1%-2% of Mg, 1%-2% of Zn, 0.3%-0.8% of Si, 0.1% of Ni, 0.05% of Ti and the balance Al. The materials are smelted for 6-8 hours at high temperature to obtain molten aluminum alloy; horizontal continuous casting is carried out on the obtained molten aluminum alloy and cleaning is conducted; the aluminum alloy profile is obtained through continuous extruding and forming; second-stage aging heat treatment is carried out on the obtained aluminum alloy profile, and a finished corrosion-resistant aluminum alloy profile product is obtained. The alloy production process is simplified and the alloy production period is shortened without homogenization and pre-heating treatment, and the energy-saving and environment-friendly production requirements of a short-process technology are completely met. Besides, the manufactured aluminum alloy profile has excellent corrosion resistance and tensile strength and can meet high-end requirements increasing day by day.
Description
Technical field
The invention belongs to technical field of metal material manufacture, be specifically related to a kind of anticorrosion aluminium ally section and production technique thereof.
Background technology
China has been that global maximum aluminium extrusion material is produced, exported and consumption big country.Current, China's aluminum extrusion industry enters the new stage of mass-producing and technology upgrading, is in the important period changed with transition.Present aluminium alloy industry towards production Environmentally-frielow-energy-consumptipolycarboxylic low-energy-consumptipolycarboxylic, the future development of alloy property excellence.
In existing Complex Aluminum Alloy, alloying element is many, Xiang Duo, even if be also the alloy of complete solid solution in the state of the equilibrium, often occurs eutectic.In order to improve its corrosion resistance nature, American-European countries successively develops the overaging systems such as T73, T76, T74.The result done like this is that corrosion resisting property improves, but tensile strength really reduces.Neither influenced in order to take into account, someone studies multistage aging to prior art, and thinks that multistage aging is the effective way improving 7N01 alloy corrosion resistance.In addition, research finds in composition proportion, only has strict implement: Zn+Mg≤7%, the rule of Zn/Mg=6 ~ 7, just can produce qualified anticorodal aluminum section bar.And multistage aging is a very complicated process, the aluminium alloy of often kind of different ingredients, just needs different multistage agings.
The continuously extruded a kind of important process being aluminium alloy extrusions and producing, continuously extruded bar material without the need to carrying out thermal pretreatment, but requires good toughness, moulding and forming property for blank.Adopt the aluminium alloy of continuously extruded shaping to mainly contain: 1050,1060,1100,3003,6063, AA1050, AA6082, AA6063, AA3103, AA1200, AA3005 and AA3004 etc. 1 are, 3 be and 6 line aluminium alloys.Along with the development of science and technology, continual extruding technology constantly improves, by the design of extrusion process and tool and mould and optimization, the fertile product cross section of institute is day by day complicated, various section bar emerges in an endless stream, but, continuously extruded all the time for object are all soft aluminium alloys.For duralumins such as 2xxx system, 4xxx system, 5xxx system and 7xxx systems, because plastic deformation resistance is comparatively large, processability is poor, is generally considered to adopt continual extruding technology to shape.Prior art is disclosed one and obtains aluminium alloy extrusions finished product by continuously extruded and two-stage time effect thermal treatment.Products obtained therefrom room temperature tensile intensity can reach 450 ~ 500MPa, and elongation can reach 4 ~ 7.7%, and average grain size can reach 0.020 ~ 0.040mm.But although this technology considerably reduces energy consumption, in practical application, elongation, namely toughness not, should can not meet high-end demand.A kind of special section bar of aviation product needed as a certain in state, requires that this kind of aluminium alloy extrusions tensile strength reaches 540N/mm
-2, Proof strength of non-proportional reaches 480N/mm
-2, elongation after fracture reaches 8%, exfoliation Corrosion reaches EB level.
The present invention aims to provide a kind of new Environment-friendlycorrosion-resistant corrosion-resistant Production technology of aluminum alloy sectional bar, optimize from raw material to processing parameter comprehensively, be surprised to find that, under the parameter optimized, can less energy-consumption produce corrosion-resistant like this, the outstanding aluminium alloy extrusions that intensity is high, this brings great benefit to production practice, and such technique have not been reported.
Summary of the invention
Based on the technical problem that background technology exists, the present invention is directed to the shortcoming of prior art, by years of researches and experiment, and optimize and pass through proportioning raw materials, and the condition of technique, a kind of new Environment-friendlycorrosion-resistant corrosion-resistant Production technology of aluminum alloy sectional bar is provided, optimizes from raw material to processing parameter comprehensively, can less energy-consumption produce corrosion-resistant, the aluminium alloy extrusions that intensity is high.And overcoming prior art Zn+Mg≤7%, Zn/Mg=6 ~ 7 could produce the technology prejudice of anticorrosion aluminium ally section, can produce the outstanding aluminium alloy extrusions having many-sided index concurrently.
Technical scheme of the present invention is as follows:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 3-8%, Fe 2-5%, Mn 5-9%, Mg 1-2%, Zn 1-2%, Si 0.3-0.8%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 6h ~ 8h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Continuously extruding and molding obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
Secondary time effect thermal treatment is carried out to the aluminium alloy extrusions that step (3) obtains, obtains anticorrosion aluminium ally section finished product.
Preferred steps (3) is: extruding rotating speed 6-9r/min, and die entrance fillet r=0.2-0.4mm, obtains aluminium alloy extrusions;
Preferred steps (4) is:
One-level: temperature is 100-120 DEG C, time 7-10h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 180-220 DEG C, time 80-100min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
Usefulness of the present invention is:
1, technique of the present invention makes alloy production technique and cycle time without the need to homogenizing and thermal pretreatment, meets the energy-conservation green production requirement of abbreviated system completely.
2, the aluminium alloy extrusions that the present invention obtains has outstanding erosion resistance and tensile strength, can meet the high-end demand day by day increased.
Embodiment
embodiment 1:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 8%, Fe 3%, Mn 5%, Mg 2%, Zn 1.5%, Si 0.5%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 6h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Extruding rotating speed 9r/min, die entrance fillet r=0.2mm, obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
One-level: temperature is 120 DEG C, time 7h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 220 DEG C, time 80min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
embodiment 2:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 3%, Fe 2%, Mn 5%, Mg 1%, Zn 1.7%, Si 0.3%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 8h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Extruding rotating speed 6r/min, die entrance fillet r=0.4mm, obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
One-level: temperature is 100 DEG C, time 10h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 180 DEG C, time 100min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
embodiment 3:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 3%, Fe 5%, Mn 6%, Mg 1.5%, Zn 1.1%, Si 0.4%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 7h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Extruding rotating speed 8r/min, die entrance fillet r=0.3mm, obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
One-level: temperature is 110 DEG C, time 9h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 188 DEG C, time 88min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
embodiment 4:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 4%, Fe 4%, Mn 7%, Mg 2%, Zn 1.3%, Si 0.7%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 6h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Extruding rotating speed 7r/min, die entrance fillet r=0.2mm, obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
One-level: temperature is 117 DEG C, time 8h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 200 DEG C, time 95min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
embodiment 5:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 3%, Fe 2%, Mn 6%, Mg 1.8%, Zn 1.4%, Si 0.8%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 8h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Extruding rotating speed 9r/min, die entrance fillet r=0.4mm, obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
One-level: temperature is 105 DEG C, time 7h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 195 DEG C, time 93min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
embodiment 6:
In fact, quality feeds proportioning of the present invention, and continuously extruded parameter, secondary time effect thermal treatment has significant synergy, changes parameter, has a great impact result.
Comparative example 1:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 9%, Fe 2%, Mn 3%, Mg 1.4%, Zn 1%, Si 0.6%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 7h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Extruding rotating speed 8r/min, die entrance fillet r=0.3mm, obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
One-level: temperature is 150 DEG C, time 10h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 250 DEG C, time 84min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
embodiment 7:
Comparative example 2:
A kind of production method of anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 3%, Fe 2%, Mn 8%, Mg 1.7%, Zn 1%, Si 0.3%, Ti 0.05%, all the other are Al, and at high temperature melting 8h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Extruding rotating speed 7r/min, die entrance fillet r=0.2mm, obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
One-level: temperature is 215 DEG C, time 99min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 115 DEG C, time 9h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
embodiment 8 index is tested and assessed:
The aluminium alloy extrusions using the comparative example 1-2 of embodiment 1-5 and embodiment 7-8 to obtain carries out index test and appraisal, and result is as shown in table 1.
Wherein, erosion resistance is by GB GB/T6892-2006 regulation, and small blister scar, crackle, thin slice or powder appear in surface, and phenomenon (EA) level only with slight separation is qualified; There is obvious layering in surface, and phenomenon (EB ~ ED) level penetrated into metal is defective.
Result is as shown in table 1.
Table 1
| Tensile strength/(N/mm -2) | Erosion resistance | Average grain size (mm) | |
| Embodiment 1 | 510 | EA | 0.03 |
| Embodiment 2 | 500 | EA | 0.04 |
| Embodiment 3 | 535 | EA | 0.02 |
| Embodiment 4 | 525 | EA | 0.04 |
| Embodiment 5 | 550 | EA | 0.02 |
| Comparative example 1 | 393 | EC | 0.03 |
| Comparative example 2 | 408 | EC | 0.02 |
As can be seen from the experimental result of form, only have the erosion resistance of EC relative to comparative example, technique of the present invention can surprisingly be produced has EA rank corrosion resistant aluminum alloy section bar.Drip 2mL acetate and hydrochloride in the aluminum alloy mould surface observation of embodiment of the present invention 1-5 with dropper respectively, until surface drying, have no bubbling phenomenon, surface is intact.Conclusion is also that this aluminium shape surface coating is acidproof.In addition, the aluminium alloy extrusions that the present invention obtains, elongation can reach 11-13%, and toughness is also very outstanding.
As can be seen here, technique of the present invention is very outstanding, and can produce corrosion-resistant in energy-conserving and environment-protective ground, the aluminium alloy extrusions that tensile strength is large, this type material has market potential.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (3)
1. the production method of an anticorrosion aluminium ally section:
(1) batching and melting:
Prepare burden according to mass percent: Cu 3-8%, Fe 2-5%, Mn 5-9%, Mg 1-2%, Zn 1-2%, Si 0.3-0.8%, Ni 0.1%, Ti 0.05%, all the other are Al, and at high temperature melting 6h ~ 8h, obtains molten aluminium alloy;
(2) horizontal casting:
The aluminium alloy solution obtained is carried out horizontal casting, and cleans;
(3) continuously extruded:
Continuously extruding and molding obtains aluminium alloy extrusions;
(4) secondary time effect thermal treatment:
Secondary time effect thermal treatment is carried out to the aluminium alloy extrusions that step (3) obtains, obtains anticorrosion aluminium ally section finished product.
2. the production method of anticorrosion aluminium ally section according to claim 1, is characterized in that:
Preferred steps (3) is: extruding rotating speed 6-9r/min, and die entrance fillet r=0.2-0.4mm, obtains aluminium alloy extrusions;
Preferred steps (4) is:
One-level: temperature is 100-120 DEG C, time 7-10h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature;
Secondary: temperature is 180-220 DEG C, time 80-100min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
3. the production method described in claim 1-2 produces the anticorrosion aluminium ally section obtained.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256178A (en) * | 2015-10-29 | 2016-01-20 | 无锡市嘉邦电力管道厂 | Corrosion resisting aluminum alloy and preparing method thereof |
| CN105331910A (en) * | 2015-11-05 | 2016-02-17 | 山东南山铝业股份有限公司 | 6063-T5 aluminum profile two-stage energy-saving aging process |
| CN106011548A (en) * | 2016-07-07 | 2016-10-12 | 无锡戴尔普机电设备有限公司 | Novel aluminum profile material |
| CN107686917A (en) * | 2016-08-05 | 2018-02-13 | 田静 | A kind of aluminium alloy |
| CN108213389A (en) * | 2017-12-29 | 2018-06-29 | 安徽高德铝业有限公司 | A kind of door and window aluminium alloy extrusions processing technology of vacuum pouring forming |
-
2015
- 2015-06-12 CN CN201510321524.5A patent/CN104962786B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256178A (en) * | 2015-10-29 | 2016-01-20 | 无锡市嘉邦电力管道厂 | Corrosion resisting aluminum alloy and preparing method thereof |
| CN105331910A (en) * | 2015-11-05 | 2016-02-17 | 山东南山铝业股份有限公司 | 6063-T5 aluminum profile two-stage energy-saving aging process |
| CN106011548A (en) * | 2016-07-07 | 2016-10-12 | 无锡戴尔普机电设备有限公司 | Novel aluminum profile material |
| CN107686917A (en) * | 2016-08-05 | 2018-02-13 | 田静 | A kind of aluminium alloy |
| CN108213389A (en) * | 2017-12-29 | 2018-06-29 | 安徽高德铝业有限公司 | A kind of door and window aluminium alloy extrusions processing technology of vacuum pouring forming |
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Denomination of invention: Anticorrosion aluminium ally section and its preparing process Effective date of registration: 20171214 Granted publication date: 20170104 Pledgee: The Agricultural Bank of Huzhou branch, Limited by Share Ltd Chinese Pledgor: Zhejiang rice new material Limited by Share Ltd Registration number: 2017980000551 |
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