CN1150179A - Al-Li alloy low-temp superplasticity pretreating method - Google Patents
Al-Li alloy low-temp superplasticity pretreating method Download PDFInfo
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- CN1150179A CN1150179A CN 95113916 CN95113916A CN1150179A CN 1150179 A CN1150179 A CN 1150179A CN 95113916 CN95113916 CN 95113916 CN 95113916 A CN95113916 A CN 95113916A CN 1150179 A CN1150179 A CN 1150179A
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Abstract
A low-temp. super-plasticity pretreating process for Al-Li alloy includes such steps as uniforming and milling the surface of alloy ingot, wrapping aluminium, heating to 300-400 deg.C, applying 10-15 MPa and insulating at the same temp. for 30-50 min, hot-rolling to 10 mm at 450 deg.C, solid dissolving at 530 deg.C for 1-2 hr, ageing at 360-420 deg.C for 24-40 hr, cold-rolling to 1.2-1.5 mm, low-temp. recrystallizing at 250-450 deg.C for 25-40 min and quenching in water, and features lowering super-plasticity deformation temp. by 60-100 deg.C, increasing strain rate by 10 times and effectively surppressing oxidation and lithium loss in the process of super-plasticity treatment and strain. It is suitable for low-temp. super-plasticity pretreatment of Al-Li-Cu-Mg-Zr series alloys.
Description
The present invention relates to the treatment technology that gives of non-ferrous raw material, particularly a kind of Al-Li alloy low-temp superplasticity gives the method for processing.
Prior art Al-Li alloy super mould give the treatment process method be basically continue to use traditional 7 * * * super the moulding of line aluminium alloy give treatment process, be about to alloy hot rolled material through solid solution, overaging, warm-rolling, about 530 ℃ of recrystallize, shrend obtain the following recrystallization crystal particle dimension of about 10 μ.The super sheet material of moulding that obtains by this pretreatment technology is 510 ℃ of-525 ℃ of temperature ranges, and strain rate is lower than 8.33 * 10
-4S
-1Experiment condition under could obtain superplasticity preferably.This superplastic deformation condition (high temperature, low strain rate) has two outstanding shortcomings:
1, in the oxidation of superplastic deformation process interalloy with to take off lithium very serious, the super unit elongation of moulding of influence reduces the quality of superplastic forming spare;
2, former is required height, the cost height wastes energy.
Deficiency in view of prior art exists the invention provides a kind of temperature that reduces superplastic deformation, improves the strain rate of superplastic deformation, solves the method that alloy oxidation and the Al-Li alloy low-temp superplasticity that takes off the lithium phenomenon give processing.
For achieving the above object, the present invention realizes by following steps: earlier the alloy pig homogenizing is handled, milled face, carry out alclad technology then, promptly at 300 ℃ of-400 ℃ of constant temperature, add 10-15Mpa pressure, be incubated 30-50 minute.Be diffused in its surface by hot pressing and coat the blunt aluminium of one deck.Its purpose be reduce alloy super mould give handle and the superplastic deformation process in oxidation and take off lithium.Cause 10mm 450 ℃ of hot rollings, again through 530 ℃ of solid solution 1-2 hours, 360 ℃-420 ℃ overaging 24-40 hour, the cold rolling again 1.2-1.5mm that causes, improve the recrystallized structure of alloy to improve recrystallize motivating force and nucleation rate, be that cold-reduced sheet is carried out the low temperature recrystallize at 250 ℃-450 ℃ at last, be incubated and carry out shrend after 25-40 minute.
The present invention compared with prior art has following advantage and effect:
Experimental result shows that with wide 6mm, gauge length 10mm sample is at 420 ℃-480 ℃, with 8.33 * 10 according to super thick surpassing of 1.2-1.5mm of moulding the pretreatment technology acquisition of Al-Li alloy of the present invention moulding Al-Li alloy sheet material
-4S
-1-8.33 * 10
-3S
-1Strain rate surpass and mould when stretching, superly mould unit elongation and can reach 400%-900%, mould the sample that pretreatment technology obtains and compare with existing Al-Li alloy is super: (1) reduces 60-100 ℃ of superplastic deformation temperature; (2) improve 10 times of strain rates; (3) because alclad, reduce recrystallization temperature, reduce texturing temperature and improve strain rate, suppressed effectively alloy super mould give handle and superplastic deformation in oxidation and take off lithium, thereby improved the quality of drip molding.
Below provide embodiments of the invention.
Embodiment 1:
The Al-2.20Li-2.65Cu-1.20Mg-0.15Zr alloy pig of selecting for use the ingot metallurgy method to produce after the alloy pig homogenizing is handled, mills face, carries out alclad then, and promptly at 300 ℃ of constant temperature, pressurization 10Mpa pressure is incubated 30 minutes.Cause 10mm 450 ℃ of hot rollings again, 530 ℃ of solid solutions 1 hour, through 360 ℃ of overaging 24 hours, the cold rolling 1.5mm that causes was at last 250 ℃ of recrystallize shrends after 25 minutes.
Embodiment 2:
The Al-2.20Li-2.65Cu-1.20Mg-0.15Zr alloy pig of selecting for use the ingot metallurgy method to produce, after homogenizing is handled, mill face, carry out alclad then, promptly at 400 ℃ of constant temperature, pressurization 15Mpa, be incubated 50 minutes, again 530 ℃ of solid solutions 1.5 hours, through 420 ℃ of overaging 40 hours, the cold rolling 1.2mm that causes is at last 450 ℃ of recrystallize shrends after 40 minutes.
Embodiment 3:
The Al-2.20Li-2.65Cu-1.20Mg-0.15Zr alloy pig of selecting for use the ingot metallurgy method to produce, after homogenizing is handled, mill face, carry out alclad then, promptly at 370 ℃ of constant temperature, pressurization 11Mpa, be incubated 45 minutes, cause 10mm 450 ℃ of hot rollings again, 530 ℃ of solid solutions 2 hours, through 400 ℃ of overaging 32 hours, the cold rolling 1.3mm that causes was 350 ℃ of recrystallize shrends after 30 minutes.
Claims (2)
1, a kind of Al-Li alloy low-temp superplasticity gives the method for processing, comprise the alloy pig homogenizing, mill face, hot rolling-solid solution, overaging, the shrend operation, it is characterized in that: with the alloy pig homogenizing, carry out alclad technology after milling face, promptly, add 10-15Mpa pressure, be incubated 30-50 minute at 300 ℃ of-400 ℃ of constant temperature, cause 10mm 450 ℃ of hot rollings again, at 530 ℃ of solid solution 1-2 hours, 360 ℃-420 ℃ overaging 24-40 hour, carry out the cold rolling 1.2-1.5mm that causes again, carry out the low temperature recrystallize at 250 ℃-450 ℃ at last, be incubated and carry out shrend after 25-40 minute.
2, method according to claim 1 is characterized in that: said alclad technology, can be at 340-380 ℃ of constant temperature, and said low temperature recrystallize can carry out at 300 ℃-400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95113916A CN1049251C (en) | 1995-11-14 | 1995-11-14 | Al-Li alloy low-temp superplasticity pretreating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95113916A CN1049251C (en) | 1995-11-14 | 1995-11-14 | Al-Li alloy low-temp superplasticity pretreating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1150179A true CN1150179A (en) | 1997-05-21 |
| CN1049251C CN1049251C (en) | 2000-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN95113916A Expired - Fee Related CN1049251C (en) | 1995-11-14 | 1995-11-14 | Al-Li alloy low-temp superplasticity pretreating method |
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| CN (1) | CN1049251C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173700A (en) * | 2013-03-15 | 2013-06-26 | 中国航空工业集团公司北京航空材料研究院 | Preparation method of surface deintercalation layer of Al-Cu-Li-X aluminium-lithium alloy |
| CN105369170A (en) * | 2015-12-18 | 2016-03-02 | 西南铝业（集团）有限责任公司 | Aluminum lithium alloy profile black and white spot controlling method |
| CN105483576A (en) * | 2015-12-18 | 2016-04-13 | 西南铝业（集团）有限责任公司 | Surface black and white spot control method in production of aluminum lithium alloy profile |
| CN106271035A (en) * | 2016-10-14 | 2017-01-04 | 重庆大学 | A kind of surface protection improves the method for aluminium lithium alloy strength of welded joint |
| CN106480385A (en) * | 2016-12-12 | 2017-03-08 | 中南大学 | A kind of raising aluminium lithium alloy thin plate strong plasticity solid solution pre-treating method and its heat treatment method |
| CN107858614A (en) * | 2017-11-22 | 2018-03-30 | 重庆理工大学 | A kind of micro-meter scale T based on Al Cu Li alloys1The in-situ preparation method of phase |
| CN110423966A (en) * | 2019-07-29 | 2019-11-08 | 中国航发北京航空材料研究院 | A kind of preparation process improving aluminium lithium alloy product comprehensive performance |
| CN115418534A (en) * | 2022-09-19 | 2022-12-02 | 郑州轻研合金科技有限公司 | 8090 aluminum lithium alloy fine-grain plate and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171374A (en) * | 1988-11-28 | 1992-12-15 | Allied-Signal Inc. | Rapidly solidified superplastic aluminum-lithium alloys and process for making same |
| JPH07145441A (en) * | 1993-01-27 | 1995-06-06 | Toyota Motor Corp | Superplastic aluminum alloy and its production |
| WO2001056447A2 (en) * | 2000-02-01 | 2001-08-09 | Conti Elektrikli Ev Aletleri Sanayi Ve Ticaret A.S. | Wet and dry horizontal vacuum cleaner |
| EP2258941A1 (en) * | 2009-06-05 | 2010-12-08 | Jia-Yuan Lee | Wind turbine |
-
1995
- 1995-11-14 CN CN95113916A patent/CN1049251C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173700A (en) * | 2013-03-15 | 2013-06-26 | 中国航空工业集团公司北京航空材料研究院 | Preparation method of surface deintercalation layer of Al-Cu-Li-X aluminium-lithium alloy |
| CN103173700B (en) * | 2013-03-15 | 2016-01-06 | 中国航空工业集团公司北京航空材料研究院 | The preparation method of surface deintercalation layer of Al-Cu-Li-X aluminium-lithium alloy |
| CN105369170A (en) * | 2015-12-18 | 2016-03-02 | 西南铝业（集团）有限责任公司 | Aluminum lithium alloy profile black and white spot controlling method |
| CN105483576A (en) * | 2015-12-18 | 2016-04-13 | 西南铝业（集团）有限责任公司 | Surface black and white spot control method in production of aluminum lithium alloy profile |
| CN106271035A (en) * | 2016-10-14 | 2017-01-04 | 重庆大学 | A kind of surface protection improves the method for aluminium lithium alloy strength of welded joint |
| CN106480385A (en) * | 2016-12-12 | 2017-03-08 | 中南大学 | A kind of raising aluminium lithium alloy thin plate strong plasticity solid solution pre-treating method and its heat treatment method |
| CN107858614A (en) * | 2017-11-22 | 2018-03-30 | 重庆理工大学 | A kind of micro-meter scale T based on Al Cu Li alloys1The in-situ preparation method of phase |
| CN107858614B (en) * | 2017-11-22 | 2019-04-16 | 重庆理工大学 | A kind of micro-meter scale T based on Al-Cu-Li alloy1The in-situ preparation method of phase |
| CN110423966A (en) * | 2019-07-29 | 2019-11-08 | 中国航发北京航空材料研究院 | A kind of preparation process improving aluminium lithium alloy product comprehensive performance |
| CN110423966B (en) * | 2019-07-29 | 2020-09-22 | 中国航发北京航空材料研究院 | Preparation process for improving comprehensive performance of aluminum-lithium alloy product |
| CN115418534A (en) * | 2022-09-19 | 2022-12-02 | 郑州轻研合金科技有限公司 | 8090 aluminum lithium alloy fine-grain plate and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1049251C (en) | 2000-02-09 |
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