CN104419882A - Heat treatment method of aluminum alloy profile - Google Patents
Heat treatment method of aluminum alloy profile Download PDFInfo
- Publication number
- CN104419882A CN104419882A CN201310391125.7A CN201310391125A CN104419882A CN 104419882 A CN104419882 A CN 104419882A CN 201310391125 A CN201310391125 A CN 201310391125A CN 104419882 A CN104419882 A CN 104419882A
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- CN
- China
- Prior art keywords
- aluminium alloy
- cooling
- aluminum alloy
- alloy extrusions
- alloy profile
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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
-
- 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
- C22F1/047—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 magnesium as the next major constituent
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a heat treatment method of an aluminum alloy profile. The heat treatment method comprises the following steps: (1) heating an aluminum alloy profile to 450-500 DEG C, and keeping for 1-2 hours; (2) cooling to 350-300 DEG C along with a furnace; (3) cooling to room temperature at a speed of 25 DEG C per second; (4) heating to 280-300 DEG C again, and preserving heat for 2-3 hours; and (5) finally, cooling to the room temperature along with the furnace. By adopting the heat treatment method disclosed by the invention, internal stress of the aluminum alloy profile can be removed, the size stability and plasticity of the aluminum alloy profile can be improved, and the deformation and warping can be reduced.
Description
Technical field
The present invention relates to a kind of heat treating method of aluminium alloy extrusions, belong to field of aluminum alloy heat treatment technology.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, widely applies in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry.Along with science and technology and the develop rapidly of industrial economy in recent years, increasing to the demand of Welded structural part, make the Research on Weldability of aluminium alloy also thereupon deeply.The widespread use of aluminium alloy facilitates the development of aluminum alloy solder technology, and the development of welding technique has simultaneously expanded again the Application Areas of aluminium alloy, the therefore welding technique of aluminium alloy just one of focus becoming research.
The density of fine aluminium is little (ρ=2.7g/cm3), is approximately 1/3 of iron, fusing point low (660 DEG C), aluminium is face-centred cubic structure, therefore has very high plasticity (δ: 32 ~ 40%, ψ: 70 ~ 90%), be easy to processing, can be made into various section bar, sheet material, corrosion resistance is good; But the intensity of fine aluminium is very low, as-annealed condition σ b value is about 8kgf/mm2, therefore should not make structured material.By long-term production practice and scientific experiment, people are gradually to add alloying element and to use the methods such as thermal treatment to carry out reinforced aluminum, and this just obtains a series of aluminium alloy.The alloy adding the formation of certain element can also have higher intensity while the advantages such as maintenance fine aluminium light weight, and σ b value can reach 24 ~ 60kgf/mm2 respectively.Its " specific tenacity " (ratio σ b/ ρ of intensity and proportion) is made to surpass a lot of steel alloy like this, become desirable structured material, be widely used in the aspects such as machinofacture, Transport Machinery, power machine and aircraft industry, the fuselage, covering, pneumatic plant etc. of aircraft are normal with aluminium alloy manufacture, to alleviate deadweight.Adopt aluminium alloy to replace the welding of steel plate materials, structural weight can alleviate more than 50%.
Aluminium alloy density is low, but strength ratio is higher, close to or exceed high-quality steel, plasticity is good, can be processed into various section bar, has excellent electroconductibility, thermal conductivity and corrosion stability, industrially widely uses, and usage quantity is only second to steel.But the shape of aluminium alloy is unstable, the shortcoming of yielding warpage also hampers the application of aluminium alloy in some delicate mechanical field.
Summary of the invention
The object of the invention is to, a kind of heat treating method of aluminium alloy extrusions is provided.It can eliminate the internal stress of aluminium alloy extrusions, can improve dimensional stability and the plasticity of aluminium alloy extrusions, and reduces distortion, warpage.
Technical scheme of the present invention: a kind of heat treating method of aluminium alloy extrusions, is characterized in, comprises the following steps:
1. aluminium alloy extrusions is heated to 450 ~ 500 DEG C, keeps 1 ~ 2 hour;
2. 350 ~ 300 DEG C are cooled to furnace temperature;
3. room temperature is cooled to 25 DEG C of speed per second;
4. 280 ~ 300 DEG C are again warming up to, insulation 2 ~ 3h;
5. last, furnace cooling is to room temperature.
Described aluminium alloy extrusions, by mass parts, comprises 94 ~ 97 parts, aluminium, 3.2 ~ 3.8 parts, magnesium, 0.2 ~ 0.3 part, manganese, 0.3 ~ 0.5 part, nickel, copper 0.1 ~ 0.2 part.
The cooling 3. of described step by inculcate in stove carbonic acid gas realize, by control carbonic acid gas pour into flow to control the cooling rate in stove.This mode is easy to implement, and can be precisely controlled.
Compared with prior art, the present invention is by carrying out temperature variation repeatedly to aluminium alloy extrusions, and use fast cooling and furnace cooling two kinds of cooling methods, quick cooling can improve the shape stability of aluminium alloy extrusions to a great extent, stove cooling then can eliminate the internal stress of aluminium alloy extrusions further, and the change of multiple temperature stage of the present invention can make sosoloid slowly decompose, second particle of separating out is assembled, thus elimination internal stress, the object reaching stable dimensions, improve plasticity, reduce distortion, warpage.Therefore, the purposes of the aluminium alloy after the inventive method process can become more extensive.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but not as the foundation limited the present invention.
Embodiment.A heat treating method for aluminium alloy extrusions, comprises the following steps: 1. by aluminium
Alloy profile is heated to 450 ~ 500 DEG C, keeps 1 ~ 2 hour;
2. 350 ~ 300 DEG C are cooled to furnace temperature;
3. room temperature is cooled to 25 DEG C of speed per second;
4. 280 ~ 300 DEG C are again warming up to, insulation 2 ~ 3h;
5. last, furnace cooling is to room temperature.
Described aluminium alloy extrusions, by mass parts, comprises 94 ~ 97 parts, aluminium, 3.2 ~ 3.8 parts, magnesium, 0.2 ~ 0.3 part, manganese, 0.3 ~ 0.5 part, nickel, copper 0.1 ~ 0.2 part.
The cooling 3. of described step by inculcate in stove carbonic acid gas realize, by control carbonic acid gas pour into flow to control the cooling rate in stove.
Claims (3)
1. a heat treating method for aluminium alloy extrusions, is characterized in that, comprises the following steps:
1. aluminium alloy extrusions is heated to 450 ~ 500 DEG C, keeps 1 ~ 2 hour;
2. 350 ~ 300 DEG C are cooled to furnace temperature;
3. room temperature is cooled to 25 DEG C of speed per second;
4. 280 ~ 300 DEG C are again warming up to, insulation 2 ~ 3h;
5. last, furnace cooling is to room temperature.
2. aluminium alloy extrusions heat treating method according to claim 1, is characterized in that: described aluminium alloy extrusions, by mass parts, comprises 94 ~ 97 parts, aluminium, 3.2 ~ 3.8 parts, magnesium, 0.2 ~ 0.3 part, manganese, 0.3 ~ 0.5 part, nickel, copper 0.1 ~ 0.2 part.
3. aluminium alloy extrusions heat treating method according to claim 1, is characterized in that: the cooling 3. of described step by inculcate in stove carbonic acid gas realize, by control carbonic acid gas pour into flow to control the cooling rate in stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310391125.7A CN104419882A (en) | 2013-08-31 | 2013-08-31 | Heat treatment method of aluminum alloy profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310391125.7A CN104419882A (en) | 2013-08-31 | 2013-08-31 | Heat treatment method of aluminum alloy profile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104419882A true CN104419882A (en) | 2015-03-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310391125.7A Pending CN104419882A (en) | 2013-08-31 | 2013-08-31 | Heat treatment method of aluminum alloy profile |
Country Status (1)
| Country | Link |
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| CN (1) | CN104419882A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219986A (en) * | 2015-10-31 | 2016-01-06 | 林州市林丰铝电有限责任公司 | A kind of production method of aluminum alloy casting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024265A (en) * | 2001-07-25 | 2009-02-05 | Showa Denko Kk | Aluminum alloy and aluminum and aluminum alloy material having excellent machinability |
| CN101509648A (en) * | 2008-07-08 | 2009-08-19 | 浙江晶日照明科技有限公司 | Section bar processing technique for producing LED street lamp radiation fins |
| CN101760679A (en) * | 2009-12-28 | 2010-06-30 | 东北轻合金有限责任公司 | Preparation method of 7B04 aluminium alloy section |
| CN102127667A (en) * | 2010-11-29 | 2011-07-20 | 长沙朗圣实验室设备有限公司 | Aluminium alloy section and manufacture method thereof |
| CN102825092A (en) * | 2012-08-30 | 2012-12-19 | 郴州市强旺新金属材料有限公司 | Production process of hard aluminum alloy profiles |
-
2013
- 2013-08-31 CN CN201310391125.7A patent/CN104419882A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024265A (en) * | 2001-07-25 | 2009-02-05 | Showa Denko Kk | Aluminum alloy and aluminum and aluminum alloy material having excellent machinability |
| CN101509648A (en) * | 2008-07-08 | 2009-08-19 | 浙江晶日照明科技有限公司 | Section bar processing technique for producing LED street lamp radiation fins |
| CN101760679A (en) * | 2009-12-28 | 2010-06-30 | 东北轻合金有限责任公司 | Preparation method of 7B04 aluminium alloy section |
| CN102127667A (en) * | 2010-11-29 | 2011-07-20 | 长沙朗圣实验室设备有限公司 | Aluminium alloy section and manufacture method thereof |
| CN102825092A (en) * | 2012-08-30 | 2012-12-19 | 郴州市强旺新金属材料有限公司 | Production process of hard aluminum alloy profiles |
Non-Patent Citations (1)
| Title |
|---|
| 闫庆斌: "《铸造合金熔炼及控制》", 31 January 2011 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219986A (en) * | 2015-10-31 | 2016-01-06 | 林州市林丰铝电有限责任公司 | A kind of production method of aluminum alloy casting |
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Application publication date: 20150318 |