CN102560298A - Heat treatment method particularly applicable to spinning plastic forming of aluminum alloy extruded tube - Google Patents
Heat treatment method particularly applicable to spinning plastic forming of aluminum alloy extruded tube Download PDFInfo
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- CN102560298A CN102560298A CN2012100486720A CN201210048672A CN102560298A CN 102560298 A CN102560298 A CN 102560298A CN 2012100486720 A CN2012100486720 A CN 2012100486720A CN 201210048672 A CN201210048672 A CN 201210048672A CN 102560298 A CN102560298 A CN 102560298A
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Abstract
The invention discloses a heat treatment method particularly applicable to spinning plastic forming of an aluminum alloy extruded tube, aiming to provide a method by which industrial application can be economically and effectively, and the toughness level of an alloy material can be improved on the basis of keeping the spinning plastic forming capability of the aluminum alloy extruded tube. The key point of the technical scheme is that the heat treatment method comprises the following steps: firstly, proceeding from control of the metallurgical quality of the aluminum alloy to reduce the Fe impurity content and alloying of a trace element, cooling the extruded tube in a high temperature forming process; secondly, naturally aging the extruded tube to a stable state, annealing the extruded tube, and performing spinning plastic forming on an annealed 6063 alloy extruded tube; and finally, aging the extruded tube artificially. The heat treatment method is characterized in that through microalloying and annealing treatment, the material can obtain plasticity which is necessary to spinning forming; a fine grain strain hardening mechanism as well as a pre-aging mechanism in the spinning plastic forming process accumulate energy for desolventizing precipitation process in the later artificial aging treatment; and the mechanical properties of a spinning workpiece material can reach standard stated values in a T5 state.
Description
Technical field
The present invention relates to a kind of heat-treatment technology method, particularly relate to a kind of heat-treatment technology method that is used for the aluminium alloy extruded tubing of spinning plastic making.
Background technology
Rotary pressure technology is local plastic forming process continuously, by the rotation of instruments such as spinning roller, core, can make aluminum alloy materials produce local continuous modification, obtains to have the rotary surface aluminium alloy element.For example use aluminium alloy extruded pipe, obtain a kind of surface shape fin in the shape of a spiral through the spinning plastic making, and the aluminium alloy pipe of tool heat sinking function.
Adopt spinning forming process to make workpiece, its higher-strength, comparatively Accurate Shaping size and excellent surface smooth finish are that its over-all properties pursues one's goal.The thermomechanical treatment technology that adopts in the aluminum alloy heat extruded tube spinning process of exploitation in recent years; Phase transformation strengthening combines when the deformation strengthening of viscous deformation soon and thermal treatment, the spin-on material over-all properties is improved, but this technology is limited to the laboratory applications result more; And because required workpiece solid solution/quenching process is handled in the thermomechanical treatment technology; Need in mould pressing operation passage, to carry out, before particularly many spinning passages in the end, implement off-line solid solution heating, insulation and shrend thermal treatment; Reduce production efficiency, especially be unfavorable for industrial application.
Summary of the invention
Technical problem to be solved by this invention is; Provide a kind of and can realize industrial application cost-effectively; And keeping on the aluminium alloy extruded tubing spinning plastic forming ability basis; Improve alloy material mechanical property level, be specially adapted to the heat-treatment technology method of the aluminium alloy extruded tubing of 6063 types of mould pressing.
The technical scheme that the present invention adopted is: reduce foreign matter content and micro-alloyings such as Fe from control duraluminum metallurgical quality, extruded tube is by the cooling of high-temperature molding process, and seasoning is to basicly stable state and carry out anneal then; 6063 alloy pipes after the annealing are implemented the spinning plastic making, carry out artificial aging thermal treatment at last.
A kind of heat-treatment technology method that is specially adapted to the aluminium alloy extruded tubing of spinning plastic making of the present invention, this process method comprises step:
A. microalloying is handled aluminium alloy extruded round ingot casting heating back extruding, and accept online air synchronously, and seasoning to basicly stable state;
B. anneal; This state extruded tube is placed in the lehre, and Heating temperature is 400～420 ℃, 2～3 hours heat-up times, the air cooling of coming out of the stove;
C. mould pressing; Wherein, produce distortion heat at plastic forming process, effectively active material low temperature preageing thermal treatment, the preageing temperature is 70 ℃;
D. artificial aging is handled; In the timeliness process furnace, carry out ageing treatment, its Heating temperature is 170～180 ℃, soaking time 8 hours.
The invention has the beneficial effects as follows: through microalloying and anneal, material obtains the necessary plasticity storage of spinning plastic making; Refined crystalline strengthening, strain-hardening and " preageing " mechanism that spinning plastic forming process itself takes place, the precipitation precipitation process that takes place for artificial aging thermal treatment has again been put aside energy.Spinning workpiece material mechanical property therefore be improved significantly.
Embodiment
Below in conjunction with embodiment the present invention is done further explain:
(1) application of micro-alloying technology: promptly in 6063 alloys, add 0.05～0.15%Ti, simultaneously Fe content is limited in 0.15～0.2%; To form the complex compound of rich Ti after adding the Ti element, and improve deleterious rich Fe phase pattern and distribution, and the more distribution of quantity more disperse is even, the core of more heterogeneous nucleations is provided, be beneficial to the raising of grain refining and alloy mechanical property.
(2) extruded tube anneal: the aluminium alloy extruded tubing of seasoning to stable state will obtain the perfect recrystallization tissue after annealing.In heat-processed, half solid solution behavior of part intracrystalline precipitated phase dissolved and recrystallization process take place simultaneously in the alloy, and therefore alloy material forms the thin brilliant recrystallized structure of half solid solution attitude, and obtains enough plasticity storages.Annealing process is: 400～420 ℃ of Heating temperatures, soaking time: 2～3 hours.
(3) mould pressing process/preageing thermal treatment: in the annealed state aluminium alloy pipe rotary pressure deformation process, because strain-hardening and heat effect thereof, and the long-pending accumulative energy of a large amount of grain boundary dislocation plugs in the fine grained texture, driving material low temperature preageing mechanism; Realize that 70 ℃ and above low temperature aging pre-treatment can make precipitated phase quantity increase, size is tiny and be evenly distributed, and effectively improves alloy mechanical property.
(4) artificial aging thermal treatment: workpiece after the spinning plastic making is carried out timeliness thermal treatment; " pre-treatment " that in the spinning plastic forming process, takes place synchronously; And strain hardening, refined crystalline strengthening causes that the alloy dislocation multiplication has all improved artificial aging power, the precipitation process will be quickened because of cold deformation; And the forming core that effectively activates precipitated phase with separate out, spinning workpiece material mechanical property be improved significantly.The artificial aging treatment process is: 170～180 ℃ of Heating temperatures, soaking time: 8 hours.
Embodiment 1:
With the aluminium alloy extruded tubing of 6063 types is example, and chemical ingredients is Al-0.54 Mg-0.43 Si-0.15 Fe-0.10 Ti (mass percent).
(1) with aluminium alloy extruded round ingot casting heating back extruding, and accept online air synchronously, high-temperature molding cooling back obtains seasoning to stable state extruded tube, and its typical mechanical property such as table 1 show.
Table 1
(2) place lehre to carry out anneal this state extruded tube: 410 ℃ of Heating temperatures, 2.5 hours heat-up times, the air cooling of coming out of the stove; Material can obtain the fine grained texture of average grain size 110 μ m perfect recrystallizations, and its typical mechanical property such as table 2 show.
Table 2
(3) extruded tube entering mould pressing operation after annealing, the distortion heat that this plastic forming process produces, effectively the thermal treatment of active material low temperature preageing is machine-processed, 70 ℃ of preageing temperature.
(4) workpiece places the timeliness process furnace to carry out artificial aging and handles 170 ℃ of aging temps, soaking time 8 hours after the spinning plastic making.Utilize short proportional test bar to measure the alloy tensile mechanical properties, and compare with standard code T5 state tensile mechanical properties, result such as table 3 show.
Table 3
Can find out from table 3; 6063 aluminium alloy extruded tubing through said process control; After experience spinning plastix strain and artificial aging were handled, the tensile strength of material, disproportional extension strength and elongation after fracture had had all met and exceeded T5 state standard gauge definite value.
Claims (5)
1. a heat-treatment technology method that is specially adapted to the aluminium alloy extruded tubing of spinning plastic making is characterized in that, this process method comprises step:
A. microalloying aluminium alloy treated extruding circle ingot casting heating back is pushed, and accepted online air synchronously, and seasoning to basicly stable state;
B. anneal;
C. mould pressing; Wherein, produce distortion heat, effectively active material low temperature preageing thermal treatment mechanism at plastic forming process;
D. artificial aging is handled.
2. the heat-treatment technology method that is specially adapted to the aluminium alloy extruded tubing of spinning plastic making according to claim 1; It is characterized in that; In the said steps A microalloying aluminium alloy treated extruding circle ingot casting, add 0.05～0.15%Ti, simultaneously Fe content is limited in 0.15～0.2%; Air is pushed and accepted synchronously in the heating back, and high-temperature molding cooling back seasoning is to basicly stable state.
3. the heat-treatment technology method that is specially adapted to the aluminium alloy extruded tubing of spinning plastic making according to claim 1; It is characterized in that the extruded tube of said step B is placed in the lehre, and Heating temperature is 400～420 ℃; 2～3 hours heat-up times, the air cooling of coming out of the stove.
4. the heat-treatment technology method that is specially adapted to the aluminium alloy extruded tubing of spinning plastic making according to claim 1 is characterized in that, the preageing temperature of said step C is 70 ℃.
5. the heat-treatment technology method that is specially adapted to the aluminium alloy extruded tubing of spinning plastic making according to claim 1 is characterized in that, said step D carries out in the timeliness process furnace, and its Heating temperature is 170～180 ℃, soaking time 8 hours.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589975A (en) * | 2013-11-07 | 2014-02-19 | 中国航天科技集团公司长征机械厂 | Die-less spinning technology for large thick-wall aluminum alloy curved bus type rotary body part |
| CN105567940A (en) * | 2015-12-23 | 2016-05-11 | 北京有色金属研究总院 | Method for improving flaring and bending deformation resisting capacity of metal pipe |
| US10105746B1 (en) | 2015-09-14 | 2018-10-23 | Shoals Tubular Products, Inc. | Tube end sealing method |
| CN114850260A (en) * | 2022-04-22 | 2022-08-05 | 成都飞机工业（集团）有限责任公司 | Aluminum alloy pipe bending forming method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514421A (en) * | 2009-04-03 | 2009-08-26 | 天津锐新电子热传技术股份有限公司 | Aluminium alloy material of electric hardware fittings and manufacturing method thereof |
| CN101717870A (en) * | 2009-12-28 | 2010-06-02 | 东北轻合金有限责任公司 | Method for manufacturing aluminum alloy bar for rail wagon body rivets |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514421A (en) * | 2009-04-03 | 2009-08-26 | 天津锐新电子热传技术股份有限公司 | Aluminium alloy material of electric hardware fittings and manufacturing method thereof |
| CN101717870A (en) * | 2009-12-28 | 2010-06-02 | 东北轻合金有限责任公司 | Method for manufacturing aluminum alloy bar for rail wagon body rivets |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103589975A (en) * | 2013-11-07 | 2014-02-19 | 中国航天科技集团公司长征机械厂 | Die-less spinning technology for large thick-wall aluminum alloy curved bus type rotary body part |
| CN103589975B (en) * | 2013-11-07 | 2015-03-25 | 中国航天科技集团公司长征机械厂 | Die-less spinning technology for large thick-wall aluminum alloy curved bus type rotary body part |
| US10105746B1 (en) | 2015-09-14 | 2018-10-23 | Shoals Tubular Products, Inc. | Tube end sealing method |
| CN105567940A (en) * | 2015-12-23 | 2016-05-11 | 北京有色金属研究总院 | Method for improving flaring and bending deformation resisting capacity of metal pipe |
| CN105567940B (en) * | 2015-12-23 | 2017-08-25 | 北京有色金属研究总院 | A kind of method for improving the anti-enlarging crooked deformability of metal pipe material |
| CN114850260A (en) * | 2022-04-22 | 2022-08-05 | 成都飞机工业（集团）有限责任公司 | Aluminum alloy pipe bending forming method |
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