CN104451296A - Method for manufacturing 2-series aluminum alloy - Google Patents
Method for manufacturing 2-series aluminum alloy Download PDFInfo
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- CN104451296A CN104451296A CN201410775472.4A CN201410775472A CN104451296A CN 104451296 A CN104451296 A CN 104451296A CN 201410775472 A CN201410775472 A CN 201410775472A CN 104451296 A CN104451296 A CN 104451296A
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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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
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Abstract
The invention provides a method for manufacturing a 2-series aluminum alloy. The method comprises the following steps: firstly carrying out uniform heat treatment on an aluminum alloy ingot, and then cooling to obtain an aluminum alloy ingot subjected to uniform heat treatment; and then rolling the aluminum alloy ingot subjected to the uniform heat treatment, and then carrying out air-cushion furnace solid solution quenching to obtain the 2-series aluminum alloy. The method for manufacturing the 2-series aluminum alloy, which is provided by the invention, is suitable for the manufacture of an aluminum alloy for 2xxxseries aviation. The 2-series aluminum alloy manufactured through the method has the advantages of lower crack propagation rate and preferable fatigue property and mechanical property.
Description
Technical field
The invention belongs to technical field of metal, particularly relate to a kind of preparation method of 2 line aluminium alloys.
Background technology
The alloy of aluminium alloy to be a kind of with aluminium be base, main alloy element has copper, silicon, magnesium, zinc and manganese.Aluminium alloy is a most widely used class non-ferrous metal structured material in industry.At present, aluminium alloy is one comparatively main in aluminium alloy extrusions, its production method becomes ingot bar by aluminium alloy or direct chill casting, or continuous casting becomes thick strip, is then rolled into pre-determined thickness, use one independent operation by after strap cold rolling to final thickness again, heat-treat technique, to improve the mechanical property of aluminium alloy, corrosion resistance nature, and improve its processing characteristics, obtain the stability of size.
The thermal treatment process of aluminium alloy can be divided into anneal, solution treatment, ageing treatment and cold cycling treatment.In annealing process, sosoloid decomposes, and Second Phase Particles is assembled, and can eliminate the internal stress of foundry goods, stablize casting dimension, reduces distortion, increases the plasticity of foundry goods.Solution heat treatment refers to that alloy being heated to high temperature single phase region constant temperature keeps, make in hot rolling and cold-rolled process, the all soluble alloy component dissolves be precipitated out from precursor alloy become sosoloid, quick cooling is to obtain the thermal treatment process of supersaturated solid solution, heavy alloyed intensity and plasticity can be put forward, improve the corrosion resistance nature of alloy.Ageing treatment carries out the spontaneous process that supersaturated solid solution decomposes, thus makes the dot matrix of alloy substrate return to more stable state.Cold cycling treatment can cause sosoloid lattice contraction and expansion, makes the lattice of each phase there occurs a little displacement, makes Second Phase Particles be in more stable state, thus improves the stability of alloy size, is suitable for the manufacture of precision component.
Along with the fast development of economy, aluminium alloy is widely applied in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry, especially in recent years, along with global economic integration, Air Logistics is fast-developing, and air system drives the flourish of Aerospace manufacturing industry, based on domestic, international Aircraft Market demand, as the aluminium alloy of one of the main raw of aircraft industry, downstream producer is progressively promoting its demand and specification of quality always.Aircraft aluminium alloy plate requires that employing density is little, intensity is high, good processability aluminum alloy materials.In the trade mark of numerous aluminium alloy, aircraft aluminium alloy is mostly 2xxx alloy, but because foreign technology is secret, the research of Domestic Aircraft alloy product lacks systematicness and causes gap, the performance of of home make 2xxx line aluminium alloy, description, production level still can not meet organism material service requirements completely, its mechanical property need further raising, needs to work out the novel alloy that can meet fuselage and use on traditional 2xxx system alloy basis.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is the preparation method providing a kind of 2 line aluminium alloys, especially be applicable to a preparation method for 2xxx system aviation alloyed aluminium, 2 line aluminium alloys prepared by present method have good anti-fatigue performance and mechanical property.
The invention provides a kind of preparation method of 2 line aluminium alloys, it is characterized in that, comprise the following steps,
A) aluminium alloy cast ingot is carried out homogenizing thermal treatment, then after cooling, obtain the heat treated aluminium alloy cast ingot of homogenizing;
B) by after heat treated for homogenizing aluminium alloy cast ingot rolling, after carrying out air cushion furnace solution hardening, 2 line aluminium alloys are obtained.
Preferably, the heat treated temperature of described homogenizing is 450 DEG C ~ 520 DEG C.
Preferably, the described homogenizing heat treated time is 15 ~ 20 hours.
Preferably, the temperature of described solution hardening is 490 DEG C ~ 510 DEG C.
Preferably, the soaking time of described solid solution is 30s ~ 300s.
Preferably, the speed of described air cushion furnace solution hardening is 2 ~ 20 ms/min.
Preferably, described rolling comprises hot rolling and/or cold rolling.
Preferably, the consisting of of described 2 line aluminium alloys:
The Fe of 0.06wt%;
The Si of 0.12wt%;
The Mg of 1.2 ~ 1.6wt%;
The Cu of 4.0 ~ 4.5wt%;
The Mn of 0.45 ~ 0.7wt%;
The aluminium of surplus.
Preferably, the consisting of of described 2 line aluminium alloys:
The Fe of 0.06wt%;
The Si of 0.12wt%;
The Mg of 1.3 ~ 1.5wt%;
The Cu of 4.1 ~ 4.4wt%;
The Mn of 0.55 ~ 0.6wt%;
The aluminium of surplus.
The invention provides a kind of preparation method of 2 line aluminium alloys, aluminium alloy cast ingot is carried out homogenizing thermal treatment by the present invention, then after cooling, obtains the heat treated aluminium alloy cast ingot of homogenizing; Then by after heat treated for homogenizing aluminium alloy cast ingot rolling, after carrying out air cushion furnace solution hardening, 2 line aluminium alloys are obtained.Wherein the composition of 2 line aluminium alloys comprises: the Fe of 0.06wt%; The Si of 0.12wt%; The Mg of 1.2 ~ 1.6wt%; The Cu of 4.0 ~ 4.5wt%; The Mn of 0.45 ~ 0.7wt% and the aluminium of surplus.Compared with prior art 2 line aluminium alloy, the present invention is by the optimization to al alloy component, in conjunction with to the cooperation of the heat treated temperature of ingot homogenization and the type of cooling and quenching mode, the interior tissue of alloy is improved, eliminate the phenomenon of Structure of Aluminum Alloy Ingots and uneven components, put forward heavy alloyed mechanical property.The preparation method of 2 line aluminium alloys provided by the invention, is particularly useful for the preparation of 2xxx system aviation alloyed aluminium, and 2 line aluminium alloys prepared by present method have lower crack growth rate and preferably fatigue property and mechanical property the method.Experimental result shows, aluminium alloy tensile strength provided by the invention is more than or equal to 458MPa.Yield strength is more than or equal to 350MPa, and unit elongation is greater than 23.5%; As Δ K=33MPa, when R=0.1, f=2 ~ 10Hz, da/dN≤3.05 × 10-3mm/cycle.
Embodiment
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
The invention provides a kind of preparation method of 2 line aluminium alloys, it is characterized in that, comprise the following steps,
First aluminium alloy cast ingot is carried out homogenizing thermal treatment, then after cooling, obtain the heat treated aluminium alloy cast ingot of homogenizing;
Then by after heat treated for homogenizing aluminium alloy cast ingot rolling, after carrying out air cushion furnace solution hardening, 2 line aluminium alloys are obtained.
The all raw materials of the present invention, be not particularly limited its source, commercially buy or prepare according to ordinary method well known to those skilled in the art.
The all raw materials of the present invention, be not particularly limited its purity, the present invention preferably adopts analytical pure.
First aluminium alloy cast ingot is carried out homogenizing thermal treatment by the present invention, then after cooling, obtains the heat treated aluminium alloy cast ingot of homogenizing; The heat treated temperature of described homogenizing is preferably 450 DEG C ~ 520 DEG C, is more preferably 480 DEG C ~ 500 DEG C; The described homogenizing heat treated time is preferably 15 ~ 20 hours, is more preferably 17 ~ 18 hours; The present invention does not have other to limit especially to described aluminium alloy cast ingot, and with the ingot casting for the preparation of 2 line aluminium alloys well known to those skilled in the art, the present invention preferably adopts composition to meet the aluminium alloy cast ingot of 2 line aluminium alloy component requirements of the present invention; The mode of the present invention to described Homogenization Treatments is not particularly limited, in Homogenization Treatments mode well known to those skilled in the art; The equipment of Homogenization Treatments of the present invention is not particularly limited, with Homogenization Treatments equipment well known to those skilled in the art; The mode of the present invention to described cooling is not particularly limited, and with the type of cooling well known to those skilled in the art, the present invention is preferably cooling fast, is more preferably water-cooled or air-cooled; The present invention is the stability ensureing Homogenization Treatments, preferably adopts the aluminium alloy cast ingot through milling face.
The present invention adopts the homogenizing thermal treatment under specified temp and time, collocation is cooling fast, significant process before being out of shape as alloy, obviously can improve the element segregation phenomenon in cast alloy, eliminate eutectic structure, reduce the focal point of stress of alloy in deformation process, put forward heavy alloyed mechanics ability, for strengthening phase Precipitation in ag(e)ing process is subsequently prepared.
Then the present invention by after heat treated for homogenizing aluminium alloy cast ingot rolling, after carrying out air cushion furnace solution hardening, obtains 2 line aluminium alloys; The temperature of described solution hardening is preferably 490 DEG C ~ 510 DEG C, is more preferably 495 DEG C ~ 505 DEG C, most preferably is 498 DEG C; The soaking time of described solid solution is preferably 30s ~ 300s, is more preferably 60s ~ 250s, is more preferably 100 ~ 200s; The speed of described air cushion furnace solution hardening is preferably 2 ~ 20 ms/min, is more preferably 5 ~ 15 ms/min; Described rolling is preferably hot rolling and/or cold rolling, is more preferably hot rolling or cold rolling, is more preferably hot rolling; The mode of the present invention to described quenching is not particularly limited, and in quenching mode well known to those skilled in the art, the present invention is preferably rapid water cold quenching; The present invention is not particularly limited the temperature after described quenching, and with temperature after quenching well known to those skilled in the art, the present invention is preferably 20 ~ 30 DEG C.
The present invention is the outward appearance and the class requirement that improve finished product aluminium alloy, and 2 line aluminium alloys preferably above-mentioned steps obtained are again through shearing, align and after sawing, obtaining finished product 2 line aluminium alloy; The present invention is not particularly limited above-mentioned technological process and state modulator condition, with technological process well known to those skilled in the art and state modulator condition, also can arrange voluntarily according to practical condition.
The present invention adopts the air cushion furnace solution hardening process under specified temp and speed, and collocation rolling, makes the interior tissue of alloy improve, further increase the mechanical property of alloy.
The composition of the present invention to described 2 line aluminium alloys is not particularly limited, and with 2 line aluminium alloys well known to those skilled in the art, the present invention preferably consists of: the Fe of 0.06 ~ 0.5wt%; The Si of 0.12 ~ 0.5wt%; The Mg of 1.2 ~ 1.8wt%; The Cu of 3.8 ~ 4.9wt%; The Mn of 0.3 ~ 0.9wt% and the aluminium of surplus;
2 line aluminium alloys of the present invention are preferably the Fe of 0.06wt%; The Si of 0.12wt%; The Mg of 1.2 ~ 1.6wt%; The Cu of 4.0 ~ 4.5wt%; The Mn of 0.45 ~ 0.7wt% and the aluminium of surplus; Be more preferably the Fe of 0.06wt%; The Si of 0.12wt%; The Mg of 1.3 ~ 1.5wt%; The Cu of 4.1 ~ 4.4wt%; The Mn of 0.5 ~ 0.65wt% and the aluminium of surplus; Most preferably be the Fe of 0.06wt%; The Si of 0.12wt%; The Mg of 1.35 ~ 1.45wt%; The Cu of 4.2 ~ 4.3wt%; The Mn of 0.55 ~ 0.6wt% and the aluminium of surplus.
2 line aluminium alloys that aforesaid method is prepared by the present invention carry out Performance Detection, and experimental result shows, aluminium alloy tensile strength prepared by the present invention is more than or equal to 458MPa.Yield strength is more than or equal to 350MPa, and unit elongation is greater than 24.5%; As Δ K=33MPa, when R=0.1, f=2 ~ 10Hz, da/dN≤3.05 × 10-3mm/cycle.
In order to further illustrate the present invention, be described in detail below in conjunction with the production method of embodiment to a kind of aluminium alloy provided by the invention.
Reagent used in following examples and aluminium alloy cast ingot are commercially available.
Embodiment 1
1.1 by aluminium alloy blank ingot casting behind milling face, obtain aluminium alloy cast ingot, aluminium alloy cast ingot being heated to soaking temperature is carry out homogenizing thermal treatment under the condition of 450 DEG C, starts rapid water cooling after 15 hours again, after being cooled to 30 DEG C, obtain the aluminium alloy cast ingot after homogenizing thermal treatment.
Aluminium alloy cast ingot after the homogenizing thermal treatment obtained in 1.1 is rolled by 1.2 at the temperature of 300 DEG C, and then being sent in air cushion furnace by the aluminium alloy cast ingot after rolling, is 495 DEG C in temperature, speed is under the condition of 5 ms/min, carry out solution hardening, after solid solution 100s, obtain 2 line aluminium alloys.
1.3 by 2 line aluminium alloys that obtain in 1.2 through shearing, after aligning and sawing, obtain finished product 2 line aluminium alloy.
According to GB and rower, 2 line aluminium alloys that above-mentioned steps obtains are tested, the Fe consisting of 0.5wt% of 2024 aluminium alloys prepared by the present embodiment; The Si of 0.5wt%; The Mg of 1.8wt%; The Cu of 4.0wt%; The Mn of 0.3wt% and the aluminium of surplus.Performance test result shows, aluminium alloy tensile strength prepared by the present invention equals 458MPa.Yield strength equals 350MPa, and unit elongation is 23.5%, and fatigue crack growth rate is, as Δ K=33MPa, when R=0.1, f=2 ~ 10Hz, da/dN is 3.05 × 10
-3mm/cycle; This shows that aluminium alloy prepared by the present invention meets national standard, meets the service requirements of the higher mechanical property of aviation 2 line aluminium alloy plates and anti-fatigue performance.
Embodiment 2
1.1 by aluminium alloy blank ingot casting behind milling face, obtain aluminium alloy cast ingot, aluminium alloy cast ingot being heated to soaking temperature is carry out homogenizing thermal treatment under the condition of 520 DEG C, starts rapid water cooling after 20 hours again, after being cooled to 30 DEG C, obtain the aluminium alloy cast ingot after homogenizing thermal treatment.
Aluminium alloy cast ingot after the homogenizing thermal treatment obtained in 1.1 is rolled by 1.2 at the temperature of 300 DEG C, then the aluminium alloy cast ingot after rolling is sent in air cushion furnace, it is 505 DEG C in temperature, speed is under the condition of 15 ms/min, carry out solution hardening, after solid solution 200s, obtain 2 line aluminium alloys.
1.3 by 2 line aluminium alloys that obtain in 1.2 through shearing, after aligning and sawing, obtain finished product 2 line aluminium alloy.
According to GB and rower, 2 line aluminium alloys that above-mentioned steps obtains are tested, the Fe consisting of 0.06wt% of 2524 aluminium alloys prepared by the present embodiment; The Si of 0.12wt%; The Mg of 1.40wt%; The Cu of 4.25wt%; The Mn of 0.6wt% and the aluminium of surplus.Performance test result shows, aluminium alloy tensile strength prepared by the present invention equals 473MPa.Yield strength equals 358MPa, and unit elongation is 24.5%, and fatigue crack growth rate is, as Δ K=33MPa, when R=0.1, f=2 ~ 10Hz, da/dN is 3.00 × 10
-3mm/cycle; This shows that aluminium alloy prepared by the present invention meets national standard, meets the service requirements of the higher mechanical property of aviation 2 line aluminium alloy plates and anti-fatigue performance.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a preparation method for 2 line aluminium alloys, is characterized in that, comprises the following steps,
A) aluminium alloy cast ingot is carried out homogenizing thermal treatment, then after cooling, obtain the heat treated aluminium alloy cast ingot of homogenizing;
B) by after heat treated for homogenizing aluminium alloy cast ingot rolling, after carrying out air cushion furnace solution hardening, 2 line aluminium alloys are obtained.
2. the preparation method of 2 line aluminium alloys according to claim 1, it is characterized in that, the heat treated temperature of described homogenizing is 450 DEG C ~ 520 DEG C.
3. the preparation method of 2 line aluminium alloys according to claim 1, it is characterized in that, the described homogenizing heat treated time is 15 ~ 20 hours.
4. the preparation method of 2 line aluminium alloys according to claim 1, it is characterized in that, the temperature of described solution hardening is 490 DEG C ~ 510 DEG C.
5. the preparation method of 2 line aluminium alloys according to claim 1, it is characterized in that, the soaking time of described solid solution is 30s ~ 300s.
6. the preparation method of 2 line aluminium alloys according to claim 1, it is characterized in that, the speed of described air cushion furnace solution hardening is 2 ~ 20 ms/min.
7. the preparation method of 2 line aluminium alloys according to claim 1, is characterized in that, described rolling comprises hot rolling and/or cold rolling.
8. the preparation method of 2 line aluminium alloys according to claim 1, is characterized in that, consisting of of described 2 line aluminium alloys:
The Fe of 0.06wt%;
The Si of 0.12wt%;
The Mg of 1.2 ~ 1.6wt%;
The Cu of 4.0 ~ 4.5wt%;
The Mn of 0.45 ~ 0.7wt%;
The aluminium of surplus.
9. the preparation method of 2 line aluminium alloys according to claim 1, is characterized in that, consisting of of described 2 line aluminium alloys:
The Fe of 0.06wt%;
The Si of 0.12wt%;
The Mg of 1.3 ~ 1.5wt%;
The Cu of 4.1 ~ 4.4wt%;
The Mn of 0.55 ~ 0.6wt%;
The aluminium of surplus.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805319A (en) * | 2015-04-30 | 2015-07-29 | 广西南南铝加工有限公司 | Manufacturing method for 2xxx series ultra-large-dimension aluminum alloy round ingot |
| CN105441839A (en) * | 2016-01-12 | 2016-03-30 | 苏州有色金属研究院有限公司 | Processing technology for improving fatigue damage resistance of 2xxx series aluminium alloy plate |
| CN105483578A (en) * | 2015-11-24 | 2016-04-13 | 苏州有色金属研究院有限公司 | Thermal treatment method for improving fatigue crack spreading rate of 2xxx-T3 plates |
| CN109825748A (en) * | 2019-02-26 | 2019-05-31 | 中铝材料应用研究院有限公司 | A method of improving Al-Cu-Mg line aluminium alloy corrosion among crystalline grains |
| CN111041308A (en) * | 2019-12-30 | 2020-04-21 | 辽宁忠旺集团有限公司 | Production process of 2-series aluminum alloy thin-wall section workpiece |
| CN111187931A (en) * | 2020-03-10 | 2020-05-22 | 西南铝业（集团）有限责任公司 | Method for precisely controlling components of high-strength 2014 aluminum alloy cast ingot for civil aircraft landing gear hub |
| CN113523722A (en) * | 2021-07-15 | 2021-10-22 | 东北轻合金有限责任公司 | Manufacturing method of aluminum alloy structural member for air cushion furnace production vehicle |
| CN113751524A (en) * | 2021-08-19 | 2021-12-07 | 山东南山铝业股份有限公司 | Production and preparation process of aviation O-state coated 7-series aluminum alloy skin sheet |
| CN113751503A (en) * | 2021-08-19 | 2021-12-07 | 山东南山铝业股份有限公司 | Welding method of 7-series aluminum alloy clad thin plate for aviation |
| CN113996655A (en) * | 2021-08-19 | 2022-02-01 | 山东南山铝业股份有限公司 | Preparation method of 7075 aluminum alloy clad skin sheet for T6-state aviation |
| CN115948668A (en) * | 2022-12-27 | 2023-04-11 | 东北轻合金有限责任公司 | Manufacturing method of high-strength heat-treatment strengthenable aluminum alloy plate quenched in air cushion furnace |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104805319A (en) * | 2015-04-30 | 2015-07-29 | 广西南南铝加工有限公司 | Manufacturing method for 2xxx series ultra-large-dimension aluminum alloy round ingot |
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| CN105483578A (en) * | 2015-11-24 | 2016-04-13 | 苏州有色金属研究院有限公司 | Thermal treatment method for improving fatigue crack spreading rate of 2xxx-T3 plates |
| CN105483578B (en) * | 2015-11-24 | 2018-03-16 | 中铝材料应用研究院有限公司 | Improve the heat treatment method of 2 ××× T3 plate fatigue crack growth rates |
| CN105441839A (en) * | 2016-01-12 | 2016-03-30 | 苏州有色金属研究院有限公司 | Processing technology for improving fatigue damage resistance of 2xxx series aluminium alloy plate |
| CN105441839B (en) * | 2016-01-12 | 2017-08-08 | 苏州有色金属研究院有限公司 | Improve the processing technology of the 2 antifatigue damage performances of ××× line aluminium alloy sheet material |
| CN109825748A (en) * | 2019-02-26 | 2019-05-31 | 中铝材料应用研究院有限公司 | A method of improving Al-Cu-Mg line aluminium alloy corrosion among crystalline grains |
| CN109825748B (en) * | 2019-02-26 | 2021-08-27 | 中铝材料应用研究院有限公司 | Method for improving intergranular corrosion performance of Al-Cu-Mg series aluminum alloy |
| CN111041308A (en) * | 2019-12-30 | 2020-04-21 | 辽宁忠旺集团有限公司 | Production process of 2-series aluminum alloy thin-wall section workpiece |
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