CN103045975A - Method for improving high probability of cracking in rolling of Al-Mg-Li system alloys - Google Patents
Method for improving high probability of cracking in rolling of Al-Mg-Li system alloys Download PDFInfo
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- CN103045975A CN103045975A CN 201210589350 CN201210589350A CN103045975A CN 103045975 A CN103045975 A CN 103045975A CN 201210589350 CN201210589350 CN 201210589350 CN 201210589350 A CN201210589350 A CN 201210589350A CN 103045975 A CN103045975 A CN 103045975A
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Abstract
The invention discloses a method for improving high probability of cracking in rolling of Al-Mg-Li system alloys. The method includes steps of using a 1420 alloy slab as a raw material, preheating the slab at a temperature of 400 DEG C for 1 hour to 6 hours, then rolling the slab, wherein the rolling reduction of each pass ranges from 15% to 25%, performing reverse rolling from a fourth pass to a sixth pass, and performing intermediate annealing between a third pass and the fourth pass. By aid of the method, Al-Mg-Li slabs cannot crack or the cracking degree is small in the rolling process, and a typical maximum non-cracking slab size achieves 500*1000*2.
Description
Technical field
The method that to the present invention relates to a kind of Al-Mg-Li of improvement be the easy rolling crack of alloy.
Background technology
The Al-Mg-Li Al-Li alloy be a kind of high-strength, can weld, aluminium alloy that cryogenic mechanics performance is good, according to existing research, the Al-Mg-Li alloy strength that passes through optimum intensive treatment can reach more than the 700MPa, is the choosing of good aerospace material.Modern aerospace industry proposes light littleization to component, requirement low-costly and in high volume, and require the aircraft component global formation, adopt superplastic forming not only can make Irregular Shaped Parts reach the purpose of global formation member and further weight reduction.But Al-Li alloy has strong work hardening and local deformaton tendency, the rolling crack problem occurs easily in to Al-Mg-Li Al-Li alloy mechanical thermal treating processes.
Summary of the invention
In order to solve the above-mentioned technical problem of the existing rolling existence of Al-Mg-Li Al-Li alloy, the present invention provides the method that a kind of Al-Mg-Li of improvement is the easy rolling crack of alloy.
The technical scheme that the present invention solves the problems of the technologies described above is: adopting 1420 alloy slabs is raw material, with slab in 400 ℃ of preheating 1～6h, then be rolled, it is characterized in that: draught per pass is 15～25%, this turns to rollingly in four-pass to the six roads, carries out process annealing between the 3rd passage to the four-pass.
Above-mentioned improves in the method that Al-Mg-Li is the easy rolling crack of alloy, the hot-rolled sheet of described raw material slab for processing through the solid solution overaging.
Above-mentioned improves in the method that Al-Mg-Li is the easy rolling crack of alloy, and described raw material plate blanket thickness is 8.5mm.
Above-mentioned improves in the method that Al-Mg-Li is the easy rolling crack of alloy,, be 2h described warm up time.
Above-mentioned improves in the method that Al-Mg-Li is the easy rolling crack of alloy, described rolling be flat rolling, namely two roller diameters are identical, direction of rotation.
Above-mentioned improves in the method that Al-Mg-Li is the easy rolling crack of alloy, described turn to rolling for current roll to for upper a time laterally, be about to former rolling to turning 90 ° and be rolled.
Above-mentioned improves in the method that Al-Mg-Li is the easy rolling crack of alloy, and described process annealing is annealed for the plate with drop in temperature in the operation of rolling melts down again, and temperature is 350 ℃～400 ℃, and soaking time is 30 minutes～60 minutes.
Technique effect of the present invention is: adopt the present invention that the Al-Mg-Li plate rolling is not ftractureed or cracking degree less, the board dimension that typically the most very much not ftractures reaches 500 * 1000 * 2.
Description of drawings
Fig. 1: the sample slab (original thickness is 8.5mm) after 01420 Al-Li alloy is processed through two-stage time effect process, do not turn to rollingly through multi-pass, deflection reaches respectively the upper figure of 76.7%() and 72.4%(figure below) cracking pattern photomacrograph.
Fig. 2: the final grain structure photo that example 1 of the present invention obtains.
Fig. 3: the high-temperature constant strain rate stretching photomacrograph of example 1 of the present invention.
Embodiment
Enforcement of the present invention illustrates with the thick 1420 Al-Li alloy hot-rolled sheets of 8.5mm.
Example 1: with slab at 400 ℃ of preheating 2h, then be rolled, rolling is flat rolling, and namely two roller diameters are identical, direction of rotation, draught per pass is 15%, this turns to rollingly in four-pass to the six roads, carries out process annealing between the 3rd passage to the four-pass, and process annealing is annealed for the plate with drop in temperature in the operation of rolling melts down again, temperature is 350 ℃～400 ℃, and soaking time is 30 minutes～60 minutes.
Example 2: then slab carries out warm-rolling at 350 ℃ of insulation 6h, and every time deflection is 20%, and this turns to rollingly in four-pass to the six roads, carries out process annealing between the 3rd passage to the four-pass.
Example 3: slab at 400 ℃ of preheating 1h, is then carried out warm-rolling, and draught per pass is 18%, and this turns to rollingly in four-pass to the six roads, carries out process annealing between the 3rd passage to the four-pass.
Claims (7)
1. one kind is improved the method that Al-Mg-Li is the easy rolling crack of alloy, may further comprise the steps: adopting 1420 alloy slabs is raw material, with slab in 400 ℃ of preheating 1～6h, then be rolled, draught per pass is 15～25%, this turns to rollingly in four-pass to the six roads, carries out process annealing between the 3rd passage to the four-pass.
2. the Al-Mg-Li of improvement according to claim 1 is the method for the easy rolling crack of alloy, the hot-rolled sheet of described raw material slab for processing through the solid solution overaging.
3. the Al-Mg-Li of improvement according to claim 1 is the method for the easy rolling crack of alloy, and described raw material plate blanket thickness is 8.5mm.
4. the Al-Mg-Li of improvement according to claim 1 is the method for the easy rolling crack of alloy, and be 2h described warm up time.
5. the Al-Mg-Li of improvement according to claim 1 is the method for the easy rolling crack of alloy, described rolling be flat rolling, namely two roller diameters are identical, direction of rotation.
6. the described Al-Mg-Li of improvement is the method for the easy rolling crack of alloy according to claim 1-5, described turn to rolling for current roll to for upper a time laterally, be about to former rolling to turning 90 ° and be rolled.
7. the described Al-Mg-Li of improvement is the method for the easy rolling crack of alloy according to claim 1-5, and described process annealing is annealed for the plate with drop in temperature in the operation of rolling melts down again, and temperature is 350 ℃～400 ℃, and soaking time is 30 minutes～60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210589350 CN103045975A (en) | 2012-12-29 | 2012-12-29 | Method for improving high probability of cracking in rolling of Al-Mg-Li system alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210589350 CN103045975A (en) | 2012-12-29 | 2012-12-29 | Method for improving high probability of cracking in rolling of Al-Mg-Li system alloys |
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| CN103045975A true CN103045975A (en) | 2013-04-17 |
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| CN 201210589350 Pending CN103045975A (en) | 2012-12-29 | 2012-12-29 | Method for improving high probability of cracking in rolling of Al-Mg-Li system alloys |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106947926A (en) * | 2017-04-21 | 2017-07-14 | 中铝瑞闽股份有限公司 | A kind of preparation method of large scale rafifinal target |
| CN107075623A (en) * | 2014-09-29 | 2017-08-18 | 伊苏瓦尔肯联铝业 | The method for preparing magnesium lithium-aluminium alloy product |
| CN108570632A (en) * | 2017-12-07 | 2018-09-25 | 湖南工程学院 | A method of improving Al-Mg-Li systems sheet alloy performance |
-
2012
- 2012-12-29 CN CN 201210589350 patent/CN103045975A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107075623A (en) * | 2014-09-29 | 2017-08-18 | 伊苏瓦尔肯联铝业 | The method for preparing magnesium lithium-aluminium alloy product |
| CN106947926A (en) * | 2017-04-21 | 2017-07-14 | 中铝瑞闽股份有限公司 | A kind of preparation method of large scale rafifinal target |
| CN106947926B (en) * | 2017-04-21 | 2018-04-03 | 中铝瑞闽股份有限公司 | A kind of preparation method of large scale rafifinal target |
| CN108570632A (en) * | 2017-12-07 | 2018-09-25 | 湖南工程学院 | A method of improving Al-Mg-Li systems sheet alloy performance |
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Application publication date: 20130417 |