CN104962786B - A kind of anticorrosion aluminium ally section - Google Patents
A kind of anticorrosion aluminium ally section Download PDFInfo
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- CN104962786B CN104962786B CN201510321524.5A CN201510321524A CN104962786B CN 104962786 B CN104962786 B CN 104962786B CN 201510321524 A CN201510321524 A CN 201510321524A CN 104962786 B CN104962786 B CN 104962786B
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Abstract
The invention discloses the production method of a kind of anticorrosion aluminium ally section: according to mass percent dispensing: 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%, remaining is Al, at high temperature melting 6h～8h, obtains molten aluminium alloy；The aluminium alloy solution obtained is carried out horizontal casting, and cleans；Continuously extruding and molding obtains aluminium alloy extrusions；The aluminium alloy extrusions obtained carries out secondary time effect heat treatment, obtains anticorrosion aluminium ally section finished product.The technique of the present invention makes alloy production technique and cycle time without homogenization and the pre-heat treatment, comply fully with the energy-conservation green production requirement of abbreviated system, and the aluminium alloy extrusions prepared has outstanding corrosion resistance and tensile strength, can meet the high demand day by day increased.
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 technology thereof.
Background technology
China has been that the aluminium extrusion material of whole world maximum produces, exports and consume big country.Currently, China's aluminum extrusion industry enters scale and the new stage of technology upgrading, is in and changes and the important period of transition.Aluminium alloy industry is towards producing Environmentally-frielow-energy-consumptipolycarboxylic low-energy-consumptipolycarboxylic now, and the direction of alloy property excellence is developed.
In existing Complex Aluminum Alloy, alloying element is many, Xiang Duo, even if being the most also the alloy of complete solid solution, eutectic often occurs.In order to improve its decay resistance, American-European countries successively develops the overaging systems such as T73, T76, T74.This have the consequence that corrosion resisting property improves, but tensile strength really reduces.The most impacted 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.Additionally, research finds in composition proportion, only strict implement: Zn+Mg≤7%, the rule of Zn/Mg=6 ~ 7, just can produce qualified corrosion resistant aluminium section bar.And multistage aging is a most complicated process, the aluminium alloy of every kind of different formulations, it is necessary to different multistage agings.
The continuously extruded a kind of important process being aluminium alloy extrusions and producing, continuously extruded bar material is without carrying out the pre-heat treatment, but requires good toughness, moulding and forming property for blank.The aluminium alloy using continuously extruded shaping mainly has: 1050,1060,1100,3003,6063, AA1050, AA6082, AA6063, AA3103, AA1200, AA3005 and AA3004 etc. 1 are, 3 are and 6 line aluminium alloys.Along with the development of science and technology, continual extruding technology constantly improves, and by the design of extrusion process and tool and mould and optimization, the fertile product cross section of institute is the most complicated, and various section bars emerge in an endless stream, but, continuously extruded all the time for object be all soft aluminium alloy.For duralumin, hard alumin ium alloys such as 2xxx system, 4xxx system, 5xxx system and 7xxx systems, owing to plastic deformation resistance is relatively big, processability is poor, is generally believed that and continual extruding technology cannot be used to shape.Prior art is disclosed one and is thermally treated resulting in aluminium alloy extrusions finished product by continuously extruded and two-stage time effect.Products obtained therefrom room temperature tensile intensity is up to 450 ~ 500MPa, and percentage elongation is up to 4 ~ 7.7%, and average grain size is up to 0.020 ~ 0.040mm.But, although this technology considerably reduces energy consumption, but in actual application, percentage elongation, namely toughness should be not, it is impossible to meets high demand.A kind of special section bar of aviation product needed as a certain in state, it is desirable to this kind of aluminium alloy extrusions tensile strength reaches 540N/mm-2, Proof strength of non-proportional reach 480N/mm-2, elongation after fracture reaches 8%, exfoliation Corrosion reaches EB level.
It is desirable to provide a kind of new Environment-friendlycorrosion-resistant corrosion-resistant Production technology of aluminum alloy sectional bar, optimize from raw material to technological parameter comprehensively, it is surprised to find that, under the parameter optimized, so can produce corrosion-resistant with low energy consumption, the outstanding aluminium alloy extrusions that intensity is high, this brings great benefit to production practices, and such technique have not been reported.
Summary of the invention
The technical problem existed based on background technology, the shortcoming that the present invention is directed to prior art, by years of researches and experiment, and optimize and pass through proportioning raw materials, and the condition of technique, it is provided that a kind of new Environment-friendlycorrosion-resistant corrosion-resistant Production technology of aluminum alloy sectional bar, optimize from raw material to technological parameter comprehensively, corrosion-resistant, that intensity is high aluminium alloy extrusions can be produced with low energy consumption.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 is as follows:
A kind of production method of anticorrosion aluminium ally section:
(1) dispensing and melting:
According to mass percent dispensing: 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%, remaining is Al, 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 heat treatment:
The aluminium alloy extrusions obtaining step (3) carries out secondary time effect heat treatment, obtains anticorrosion aluminium ally section finished product.
Preferred steps (3) is: extruding rotating speed 6-9r/min, 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；
Two grades: temperature is 180-220 DEG C, time 80-100min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
The invention have benefit that:
1, the technique of the present invention makes alloy production technique and cycle time without homogenization and the pre-heat treatment, complies fully with the energy-conservation green production requirement of abbreviated system.
2, the aluminium alloy extrusions that the present invention prepares has outstanding corrosion resistance and tensile strength, can meet the high demand day by day increased.
Detailed description of the invention
Embodiment
1
:
A kind of production method of anticorrosion aluminium ally section:
(1) dispensing and melting:
According to mass percent dispensing: Cu 8%, Fe 3%, Mn 5%, Mg 2%, Zn 1.5%, Si 0.5%, Ni 0.1%, Ti 0.05%, remaining is Al, 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, obtain aluminium alloy extrusions；
(4) secondary time effect heat treatment:
One-level: temperature is 120 DEG C, time 7h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature；
Two grades: 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) dispensing and melting:
According to mass percent dispensing: Cu 3%, Fe 2%, Mn 5%, Mg 1%, Zn 1.7%, Si 0.3%, Ni 0.1%, Ti 0.05%, remaining is Al, 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, obtain aluminium alloy extrusions；
(4) secondary time effect heat treatment:
One-level: temperature is 100 DEG C, time 10h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature；
Two grades: 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) dispensing and melting:
According to mass percent dispensing: Cu 3%, Fe 5%, Mn 6%, Mg 1.5%, Zn 1.1%, Si 0.4%, Ni 0.1%, Ti 0.05%, remaining is Al, 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, obtain aluminium alloy extrusions；
(4) secondary time effect heat treatment:
One-level: temperature is 110 DEG C, time 9h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature；
Two grades: 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) dispensing and melting:
According to mass percent dispensing: Cu 4%, Fe 4%, Mn 7%, Mg 2%, Zn 1.3%, Si 0.7%, Ni 0.1%, Ti 0.05%, remaining is Al, 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, obtain aluminium alloy extrusions；
(4) secondary time effect heat treatment:
One-level: temperature is 117 DEG C, time 8h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature；
Two grades: 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) dispensing and melting:
According to mass percent dispensing: Cu 3%, Fe 2%, Mn 6%, Mg 1.8%, Zn 1.4%, Si 0.8%, Ni 0.1%, Ti 0.05%, remaining is Al, 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, obtain aluminium alloy extrusions；
(4) secondary time effect heat treatment:
One-level: temperature is 105 DEG C, time 7h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature；
Two grades: temperature is 195 DEG C, time 93min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
Embodiment
6
:
It practice, the quality feeds proportioning of the present invention, and continuously extruded parameter, secondary time effect heat 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) dispensing and melting:
According to mass percent dispensing: Cu 9%, Fe 2%, Mn 3%, Mg 1.4%, Zn 1%, Si 0.6%, Ni 0.1%, Ti 0.05%, remaining is Al, 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, obtain aluminium alloy extrusions；
(4) secondary time effect heat treatment:
One-level: temperature is 150 DEG C, time 10h, then by aluminium alloy extrusions water-cooled or air cooling to room temperature；
Two grades: 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) dispensing and melting:
According to mass percent dispensing: Cu 3%, Fe 2%, Mn 8%, Mg 1.7%, Zn 1%, Si 0.3%, Ti 0.05%, remaining is Al, 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, obtain aluminium alloy extrusions；
(4) secondary time effect heat treatment:
One-level: temperature is 215 DEG C, time 99min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature；
Two grades: 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 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, corrosion resistance is by GB GB/T6892-2006 regulation, and small bleb scar, crackle, thin slice or powder occurs in surface, is only qualified with phenomenon (EA) level being slightly separated；There is substantially layering in surface, and to penetrate phenomenon (EB ~ ED) level into metal be defective.
Result is as shown in table 1.
Table 1
| Tensile strength/(N/mm-2) | Corrosion 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 |
From the experimental result of form it can be seen that only have the corrosion resistance of EC relative to comparative example, the technique of the present invention can surprisingly be produced has EA rank corrosion resistant aluminum alloy section bar.Respectively with dropper dropping 2mL acetate and hydrochloride in the aluminum alloy mould surface observation of embodiment of the present invention 1-5, until dry tack free, having no bubbling phenomenon, surface is intact.Conclusion is also that this aluminium shape surface coating is acidproof.Additionally, the aluminium alloy extrusions that the present invention prepares, percentage elongation can reach 11-13%, and toughness is the most outstanding.
As can be seen here, the technique of the present invention is the most outstanding, can produce corrosion-resistant, that tensile strength is big aluminium alloy extrusions in an energy-saving and environment-friendly manner, this great market potential of new material.
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; according to technical scheme and inventive concept equivalent or change in addition thereof, all should contain within protection scope of the present invention.
Claims (2)
1. the production method of an anticorrosion aluminium ally section:
(1) dispensing and melting:
According to mass percent dispensing: 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%, remaining is Al, at high temperature melting 6h～8h, obtains molten aluminium alloy；
(2) horizontal casting:
The molten aluminium alloy obtained is carried out horizontal casting, and cleans；
(3) continuously extruded:
Continuously extruding and molding obtains aluminium alloy extrusions；
(4) secondary time effect heat treatment:
The aluminium alloy extrusions obtaining step (3) carries out secondary time effect heat treatment, obtains anticorrosion aluminium ally section finished product；
Wherein said step (3) is: extruding rotating speed 6-9r/min, die entrance fillet r=0.2-0.4mm, obtains aluminium alloy extrusions；
Described step (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；
Two grades: temperature is 180-220 DEG C, time 80-100min, then by aluminium alloy extrusions water-cooled or air cooling to room temperature.
2. the production method described in claim 1 produces the anticorrosion aluminium ally section obtained.
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| 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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Address after: 313000 Zhejiang Nanxun District in the town of high-tech industrial park in Dagang Road No. 1088 12B306 Patentee after: Zhejiang rice new material Limited by Share Ltd Address before: 313000 Zhejiang city of Huzhou Province town Wuxing District Road No. 288 East Lake fabric Patentee before: ZHEJIANG MIHUANG ALUMINUM INDUSTRY CO., LTD. |
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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 |