CN103695820B - A kind of forging of 7050 aluminium alloys and heat-treatment technology method - Google Patents
A kind of forging of 7050 aluminium alloys and heat-treatment technology method Download PDFInfo
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Abstract
The invention provides a kind of forging and heat-treatment technology method of 7050 aluminium alloys, it can effectively obtain excellent mechanical property.It comprises following technical process: (1) forging and molding: be put in by starting material in process furnace and be heated to 380 DEG C ~ 420 DEG C, insulation, and then carry out forging and molding and obtain forging stock, forging deformation amount controls 30% ~ 50%, and after forging, described forging stock carries out air cooling; (2) quench treatment: forging stock is put into the heat treatment furnace heated, is incubated 3 hours, and the Heating temperature of heat treatment furnace is 470 DEG C ~ 480 DEG C, oil cooling of coming out of the stove; (3) ageing treatment: adopt two-stage aging technique, first first step ageing treatment is carried out, by the forging stock after quench treatment, put into the heat treatment furnace being heated to 121 DEG C, be incubated 3 hours ~ 6 hours, then carry out second stage ageing treatment, forging stock is heated to 177 DEG C with described heat treatment furnace, after being again incubated 6 hours, air cooling of coming out of the stove.
Description
Technical field
The present invention relates to 7050 aluminium alloy hot forming fields, especially relate to the technical field obtaining excellent mechanical performances after adopting process for forging to carry out hot forming and thermal treatment, be specially a kind of forging and heat-treatment technology method of 7050 aluminium alloys.
Background technology
7050 aluminium alloys belong to A1, Zn, Mg, Cu 7 series extra super duralumin alloy, are the Aircraft Structure Materials of a kind of high strength, high tenacity.7050 aluminum alloy forge pieces are widely used in aircraft vitals, as bulkhead, spar, the bracket equivalent-load component of undercarriage.Aviation heavy forging forging process is not singly forging forming process, the more important thing is elimination metallurgical imperfection, improves the process of tissue, reaches the object become second nature.Material property depends on the interior microscopic weave construction formed in smelting, casting, shaping, heat treatment process, and shaping plays vital effect to heterogeneous microstructure.
Therefore obtaining suitable forging and forming technology system and system of heat treatment process, is the deciding factor determining forging microtexture and final performance.
Summary of the invention
The invention provides a kind of forging and heat-treatment technology method of 7050 aluminium alloys, it can effectively obtain excellent mechanical property.
Its technical scheme is such, and it comprises following technical process:
(1) forging and molding: starting material are put in process furnace and are heated to 380 DEG C ~ 420 DEG C, insulation, then carry out forging and molding, forging deformation amount controls 30% ~ 50%, and air cooling after forging, obtains forging stock;
(2) quench treatment: described forging stock is put into the heat treatment furnace heated, insulation, the Heating temperature of described heat treatment furnace is 470 DEG C ~ 480 DEG C, oil cooling of coming out of the stove;
(3) ageing treatment: adopt two-stage aging technique, first first step ageing treatment is carried out, by the forging stock after quench treatment, put into the heat treatment furnace being heated to 121 DEG C, be incubated 3 hours ~ 6 hours, then carry out second stage ageing treatment, described forging stock is heated to 177 DEG C with described heat treatment furnace, after being again incubated 6 hours, air cooling of coming out of the stove.
It is further characterized in that:
All process furnace for heating and heat treatment furnace, temperature uniformity requires ± 5 DEG C;
Soaking time in described step (1), step (2) is determined by the maximum ga(u)ge size of heat insulating coefficient 1.5min/mm ~ 2.0min/mm and described forging stock;
In described step (1), Heating temperature preferably 420 DEG C;
In described step (2), the Heating temperature of described heat treatment furnace preferably 475 DEG C;
In described step (3), in described first step ageing treatment, described soaking time preferably 3 hours.
The beneficial effect of present invention process is:
Rational controlled forge process Heating temperature and deflection, and subsequent heat treatment quenching temperature and aging time, make the forging finally obtaining excellent mechanical property.
Embodiment
Embodiment one:
The forging of 7050 aluminium alloys and a heat-treatment technology method, it comprises following technical process:
(1) starting material are heated to 380 DEG C, are incubated after 200 minutes, carry out the forging deformation of 50% deflection, be out of shape rear air cooling;
(2) be out of shape the forging stock after terminating, put into the heat treatment furnace of 475 DEG C, be incubated after 3 hours, oil cooling of coming out of the stove, carry out quenching technology;
(3) forging stock after having quenched, puts into the heat treatment furnace being heated to 121 DEG C, is incubated after 3 hours, is heated to 177 DEG C with stove, and be incubated 6 hours, air cooling of coming out of the stove, carries out two-stage aging technique.
Embodiment two:
The forging of 7050 aluminium alloys and a heat-treatment technology method, it comprises following technical process:
(1) starting material are heated to 420 DEG C, are incubated after 200 minutes, carry out the forging deformation of 50% deflection, be out of shape rear air cooling;
(2) be out of shape the forging stock after terminating, put into the heat treatment furnace of 475 DEG C, be incubated after 3 hours, oil cooling of coming out of the stove, carry out quenching technology;
(3) forging stock after having quenched, puts into the heat treatment furnace being heated to 121 DEG C, is incubated after 3 hours, is heated to 177 DEG C with stove, and be incubated 6 hours, air cooling of coming out of the stove, carries out two-stage aging technique.
Embodiment three:
The forging of 7050 aluminium alloys and a heat-treatment technology method, it comprises following technical process:
(1) starting material are heated to 400 DEG C, are incubated after 200 minutes, carry out the forging deformation of 30% deflection, be out of shape rear air cooling;
(2) be out of shape the forging stock after terminating, put into the heat treatment furnace of 475 DEG C, be incubated after 3 hours, oil cooling of coming out of the stove, carry out quenching technology;
(3) forging stock after having quenched, puts into the heat treatment furnace being heated to 121 DEG C, is incubated after 3 hours, is heated to 177 DEG C with stove, and be incubated 6 hours, air cooling of coming out of the stove, carries out two-stage aging technique.
Embodiment four:
The forging of 7050 aluminium alloys and a heat-treatment technology method, it comprises following technical process:
(1) starting material are heated to 400 DEG C, are incubated after 200 minutes, carry out the forging deformation of 50% deflection, be out of shape rear air cooling;
(2) be out of shape the forging stock after terminating, put into the heat treatment furnace of 475 DEG C, be incubated after 6 hours, oil cooling of coming out of the stove, carry out quenching technology;
(3) forging stock after having quenched, puts into the heat treatment furnace being heated to 121 DEG C, is incubated after 3 hours, is heated to 177 DEG C with stove, and be incubated 6 hours, air cooling of coming out of the stove, carries out two-stage aging technique.
Carry out Mechanics Performance Testing to the embodiment forging after thermal treatment, result is as shown in table 1.Visible acquired results is all better than code requirement.
Table 1
Claims (6)
1. the forging of 7050 aluminium alloys and a heat-treatment technology method, is characterized in that: it comprises following technical process:
(1) forging and molding: starting material are put in process furnace and are heated to 380 DEG C ~ 420 DEG C, insulation, then carry out forging and molding and obtain forging stock, forging deformation amount controls 30% ~ 50%, and after forging, described forging stock carries out air cooling;
(2) quench treatment: described forging stock is put into the heat treatment furnace heated, is incubated 3 hours, and the Heating temperature of described heat treatment furnace is 470 DEG C ~ 480 DEG C, oil cooling of coming out of the stove;
(3) ageing treatment: adopt two-stage aging technique, first first step ageing treatment is carried out, by the forging stock after quench treatment, put into the heat treatment furnace being heated to 121 DEG C, be incubated 3 hours ~ 6 hours, then carry out second stage ageing treatment, described forging stock is heated to 177 DEG C with described heat treatment furnace, after being again incubated 6 hours, air cooling of coming out of the stove.
2. the forging of a kind of 7050 aluminium alloys according to claim 1 and heat-treatment technology method, is characterized in that: all process furnace for heating and heat treatment furnace, temperature uniformity requires ± 5 DEG C.
3. the forging of a kind of 7050 aluminium alloys according to claim 2 and heat-treatment technology method, is characterized in that: the soaking time of described step (1) is determined by the maximum ga(u)ge size of heat insulating coefficient 1.5min/mm ~ 2.0min/mm and described forging stock.
4. the forging of a kind of 7050 aluminium alloys according to claim 3 and heat-treatment technology method, is characterized in that: in described step (1), Heating temperature preferably 420 DEG C.
5. the forging of a kind of 7050 aluminium alloys according to claim 4 and heat-treatment technology method, is characterized in that: in described step (2), the Heating temperature of described heat treatment furnace preferably 475 DEG C.
6. the forging of a kind of 7050 aluminium alloys according to claim 5 and heat-treatment technology method, is characterized in that: in described step (3), in described first step ageing treatment, and described soaking time preferably 3 hours.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104674142A (en) * | 2015-02-12 | 2015-06-03 | 东北大学 | Aging heat treatment method for high-zinc aluminum alloy containing scandium |
| CN104846242A (en) * | 2015-05-12 | 2015-08-19 | 福建省闽发铝业股份有限公司 | High-strength aluminum alloy |
| CN105463350A (en) * | 2015-12-01 | 2016-04-06 | 国际铝业(厦门)有限公司 | Treatment process for increasing elongation of thick-wall aluminum alloy profile |
| CN108642410B (en) * | 2018-05-16 | 2020-01-03 | 江苏理工学院 | Process method for improving comprehensive mechanical property of aluminum alloy plate |
| CN108687160B (en) * | 2018-05-16 | 2020-02-14 | 江苏理工学院 | Aluminum alloy plate treatment process |
| CN112792271A (en) * | 2020-12-22 | 2021-05-14 | 西南铝业（集团）有限责任公司 | 7050 alloy forging production process |
| CN114799586B (en) * | 2022-03-10 | 2023-04-11 | 中国电子科技集团公司第二十九研究所 | Combined process method for connecting and destressing multifunctional composite component |
| CN115595518B (en) * | 2022-11-30 | 2023-07-25 | 昆明冶金研究院有限公司 | Forging heat treatment process for 7-series extruded aluminum alloy bar |
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| US5718780A (en) * | 1995-12-18 | 1998-02-17 | Reynolds Metals Company | Process and apparatus to enhance the paintbake response and aging stability of aluminum sheet materials and product therefrom |
| CN1656240A (en) * | 2002-06-24 | 2005-08-17 | 克里斯铝轧制品有限公司 | Method for producing a high strength Al-Zn-Mg-Cu alloy |
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| JP2002088454A (en) * | 2000-09-12 | 2002-03-27 | Honda Motor Co Ltd | Aging furnace for resin-coated aluminum alloy member |
| KR100750459B1 (en) * | 2005-06-27 | 2007-08-22 | 카야바 고교 가부시기가이샤 | Method for manufacturing aluminum alloy pipe |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5718780A (en) * | 1995-12-18 | 1998-02-17 | Reynolds Metals Company | Process and apparatus to enhance the paintbake response and aging stability of aluminum sheet materials and product therefrom |
| CN1656240A (en) * | 2002-06-24 | 2005-08-17 | 克里斯铝轧制品有限公司 | Method for producing a high strength Al-Zn-Mg-Cu alloy |
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