CN107326311A - A kind of control method of reduction Al Mg line aluminium alloy Strip yield tensile ratios - Google Patents
A kind of control method of reduction Al Mg line aluminium alloy Strip yield tensile ratios Download PDFInfo
- Publication number
- CN107326311A CN107326311A CN201710420602.6A CN201710420602A CN107326311A CN 107326311 A CN107326311 A CN 107326311A CN 201710420602 A CN201710420602 A CN 201710420602A CN 107326311 A CN107326311 A CN 107326311A
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- China
- Prior art keywords
- aluminium alloy
- reduction
- hot rolling
- yield tensile
- line aluminium
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Classifications
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
Abstract
The invention belongs to the preparation field of aluminium alloy strips, and in particular to a kind of control method of reduction Al Mg line aluminium alloy Strip yield tensile ratios.The present invention according to the recrystallization temperature of specific aluminium alloy, can carry out the adjustment of hot rolling finishing temperature, and hot rolling finishing temperature control is at 300 ~ 360 DEG C, hot rolling total reduction >=90%, with reach hot rolled coil fully recrystallize and grain uniformity purpose；Plane library saddle need to add heat keeper, avoid partial, re-crystallization insufficient in the way of Slow cooling and generation the problems such as uneven crystal grain；And appropriate increase cold processing ratio and raising annealing temperature, average grain size control is at 20 μm ~ 50 μm, the purpose of the final yield tensile ratio for realizing reduction Al Mg line aluminium alloys.
Description
Technical field
The invention belongs to the preparation field of aluminium alloy strips, and in particular to one kind reduction Al-Mg line aluminium alloys Strip is bent
The control method of strong ratio.
Background technology
Al-Mg line aluminium alloys belong to the processing of middle high-strength hot can not reinforced aluminium alloy, with solution strengthening, processing hardening and fine grain
Based on the modes such as reinforcing, it is widely used in the fields such as automobile, ship, Aero-Space, electronics.
Yield tensile ratio is used as one of important indicator for weighing aluminium alloy processability.Yield tensile ratio is smaller, shows aluminium alloy from opening
The deformation quantity for beginning to produce plastic deformation to eventual failure is bigger, it is meant that the aluminium alloy processability of low yield strength ratio is better, makes
It is safer during.Especially for the Al-Mg line aluminium alloys of centering high intensity, for ensure the security that uses and it is good into
Type performance, higher intensity is not required nothing more than, and low yield tensile ratio is required again.Influence the factor of yield tensile ratio of Al-Mg line aluminium alloys very
It is many, including chemical composition, production technology, grain structure and sample position etc..
The present invention is based on the control by rolling and Technology for Heating Processing, by controlling hot rolling total reduction and finishing temperature
More than recrystallization temperature, after plane library carry out certain time Slow cooling, to realize the isometric property of final finished crystal grain
And uniformity, and appropriate increase cold processing ratio and raising annealing temperature, average grain size control is at 20 μm ~ 50 μm, most
The purpose of the yield tensile ratio of reduction Al-Mg line aluminium alloys is realized eventually.
The content of the invention
It is an object of the invention to provide a kind of control method of reduction Al-Mg line aluminium alloy Strip yield tensile ratios.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of control method of reduction Al-Mg line aluminium alloy Strip yield tensile ratios, its processing step and control parameter are as follows：
（1）By aluminium alloy stock is smelting, refining, degasification is later half is continuously cast into aluminium alloy flat bloom for online slagging-off；Slab ingot jagsaw
Cut, behind milling face, be put into heating furnace and be heated to 450-550 DEG C and be incubated 1-5 hours, rolling of then coming out of the stove；
（2）Hot rolling is carried out first, and hot rolling total reduction >=90%, 2 ~ 8mm of hot rolled thickness, hot rolling finishing temperature is controlled 300 ~ 360
℃；
（3）Then hot rolled coil is put into plane library natural cooling time >=14 hour, while plane library saddle need to add heat keeper；Then
It is air-cooled into shelf magazine；
（4）Then carry out being cold-rolled to finished product thickness, be cold processing ratio before control finished products 30% ~ 50%, it is cold rolling if necessary
Between increase an intermediate annealing；
（5）It is rolled to after finished product thickness and carries out finished products；
（6）Intermediate annealing and finished products temperature control are at 300 ~ 360 DEG C, depending on soaking time is according to volume weight；
（7）It is to control average grain size at 20 μm ~ 50 μm, phase is carried out with reference to cold processing ratio before finished products and annealing process
The appropriateness adjustment answered.
The present invention has advantages below compared with the prior art：
（1）The present invention carries out the adjustment of hot rolling finishing temperature, hot rolling finishing temperature control according to the recrystallization temperature of specific aluminium alloy
System is at 300 ~ 360 DEG C, hot rolling total reduction more than 90%, with reach hot rolled coil fully recrystallize and grain uniformity purpose.
（2）Put can be air-cooled behind plane library natural cooling time >=14 hour for hot rolled coil in the present invention, while plane library saddle
Seat need to add heat keeper, avoid partial, re-crystallization insufficient in the way of Slow cooling and generation the problems such as uneven crystal grain.
（3）The present invention is adjusted by the appropriateness to cold processing ratio before finished products and annealing process, controls average crystal grain
Size is at 20 μm ~ 50 μm, the purpose of the final yield tensile ratio for realizing reduction Al-Mg line aluminium alloys；This is due to that crystal grain is too small, fine grain
Contribution of the intensity to yield strength is bigger, and yield tensile ratio is too high；Crystal grain is excessively thick, easily produces the harmful effects such as orange peel.
Embodiment
For the further open rather than limitation present invention, below in conjunction with example, the present invention is described in further detail.
Embodiment 1
1st, the aluminium alloy smelting of the composition composition of such as table 1, produces specification flat as 500*1300*5500 using semi-continuous casting method
Ingot：
The Al-Mg line aluminium alloy chemical compositions of table 1（Mass fraction %）
2nd, come out of the stove rolling, hot rolling exit thickness 2.0mm, 300 DEG C of hot rolling finishing temperature after 450 DEG C of heating in -1 hour；
3rd, hot rolled coil puts to the plane library natural cooling 14 hours with heat keeper that to enter shelf magazine air-cooled；
4th, cold rolling and annealing is then carried out, three kinds of scheme comparisons are devised, concrete outcome is shown in Table 2：
2 three kinds of process program performance data contrasts of table
Note：Intermediate annealing, finished products are using 300 DEG C of techniques；Above scheme does not occur orange peel cracking through 180 ° of bendings
Phenomenon.
Embodiment 2
1st, the aluminium alloy smelting of the composition composition of such as table 3, produces specification flat as 650*2000*7300 using semi-continuous casting method
Ingot：
The Al-Mg line aluminium alloy chemical compositions of table 3（Mass fraction %）
2nd, come out of the stove rolling, hot rolling exit thickness 8.0mm, 340 DEG C of hot rolling finishing temperature after 500 DEG C of heating in -4 hours；
3rd, hot rolled coil puts to the plane library natural cooling 16 hours with heat keeper that to enter shelf magazine air-cooled；
4th, cold rolling and annealing is then carried out, three kinds of scheme comparisons are devised, concrete outcome is shown in Table 4：
4 three kinds of process program performance data contrasts of table
Note：Intermediate annealing, finished products are using 340 DEG C of techniques；Above scheme does not occur orange peel cracking through 180 ° of bendings
Phenomenon.
Embodiment 3
1st, the aluminium alloy smelting of the composition composition of such as table 5, produces specification flat as 560*1500*5800 using semi-continuous casting method
Ingot：
The Al-Mg line aluminium alloy chemical compositions of table 5（Mass fraction %）
2nd, come out of the stove rolling, hot rolling exit thickness 5.1mm, 360 DEG C of hot rolling finishing temperature after 480 DEG C of heating in -3 hours；
3rd, hot rolled coil puts to the plane library natural cooling 15 hours with heat keeper that to enter shelf magazine air-cooled；
4th, cold rolling and annealing is then carried out, three kinds of scheme comparisons are devised, concrete outcome is shown in Table 6：
6 three kinds of process program performance data contrasts of table
Note：Intermediate annealing, finished products are using 360 DEG C of techniques；Above scheme does not occur orange peel cracking through 180 ° of bendings
Phenomenon.
5th, then on the basis of the process program N0.7 of table 6, three kinds of different finished products scheme comparisons, specific knot are devised
Fruit is shown in Table 7：
7 three kinds of Annealing Scheme performance data contrasts of table
Note：Above scheme does not occur the phenomenon of orange peel cracking through 180 ° of bendings.
As can be seen from the above results, with the reduction of cold processing ratio before finished products, average grain size increase resists
Tensile strength change is little, and yield strength reduction is obvious, yield tensile ratio reduction；With the rise of finished products, limited by cold rolling energy storage
System, average grain size has slight increase, and yield tensile ratio, which has, slightly to be reduced.Illustrate cold processing ratio and annealing temperature before annealing
Contrast, influence of the cold processing ratio to average grain size and yield tensile ratio is bigger.From reduction yield tensile ratio and the purpose of the saving energy
Set out, preferably relatively low cold processing ratio, and it is annealed into auxiliary to increase finished product.
The foregoing is only presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, should all belong to the covering scope of the present invention.
Claims (3)
1. a kind of control method of reduction Al-Mg line aluminium alloy Strip yield tensile ratios, it is characterised in that：Concretely comprise the following steps：
（1）By aluminium alloy stock is smelting, refining, degasification is later half is continuously cast into aluminium alloy flat bloom for online slagging-off；Slab ingot jagsaw
Cut, behind milling face, be put into heating furnace and be heated to 450-550 DEG C and be incubated 1-5 hours, rolling of then coming out of the stove；
（2）Then hot rolling is carried out, hot rolling total reduction >=90%, 2 ~ 8mm of hot rolled thickness, hot rolling finishing temperature is controlled 300 ~ 360
℃；
（3）Hot rolled coil is put into plane library natural cooling time >=14 hour, while plane library saddle need to add heat keeper；Subsequently enter
Shelf magazine is air-cooled；
（4）Coiled material after hot rolling carries out being cold-rolled to finished product thickness, and cold processing ratio is 30% ~ 50%, then carries out finished products, is made
Finished product；Or the coiled material progress after hot rolling is cold rolling, then intermediate annealing is carried out, finished product thickness is then cold-rolled to, after intermediate annealing
Cold processing ratio finally carries out finished products, finished product is made 30% ~ 50%.
2. a kind of control method of reduction Al-Mg line aluminium alloy Strip yield tensile ratios according to claim 1, its feature exists
In：Step（4）Described intermediate annealing and finished products temperature control are at 300 ~ 360 DEG C, depending on soaking time is according to volume weight.
3. a kind of control method of reduction Al-Mg line aluminium alloy Strip yield tensile ratios according to claim 1, its feature exists
In：Finished product controls average grain size at 20 μm ~ 50 μm.
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| CN201710420602.6A CN107326311A (en) | 2017-06-07 | 2017-06-07 | A kind of control method of reduction Al Mg line aluminium alloy Strip yield tensile ratios |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117265303A (en) * | 2023-11-21 | 2023-12-22 | 中铝材料应用研究院有限公司 | Aluminum alloy plate strip and preparation method thereof |
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| CN103667819A (en) * | 2013-11-22 | 2014-03-26 | 中铝瑞闽铝板带有限公司 | CTP plate base and preparation method thereof |
| CN103740990A (en) * | 2014-01-10 | 2014-04-23 | 中铝瑞闽铝板带有限公司 | Aluminum alloy strip for automobile heat insulation cover and manufacturing method thereof |
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| CN105525166A (en) * | 2016-02-05 | 2016-04-27 | 中铝瑞闽股份有限公司 | Aluminum alloy strip for anodic oxidation and preparation method thereof |
| CN105624483A (en) * | 2016-02-05 | 2016-06-01 | 中铝瑞闽股份有限公司 | Moderate-strength aluminum alloy strip used for anodic oxidation and preparation method of moderate-strength aluminum alloy strip |
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2017
- 2017-06-07 CN CN201710420602.6A patent/CN107326311A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| CN103667819A (en) * | 2013-11-22 | 2014-03-26 | 中铝瑞闽铝板带有限公司 | CTP plate base and preparation method thereof |
| CN103740990A (en) * | 2014-01-10 | 2014-04-23 | 中铝瑞闽铝板带有限公司 | Aluminum alloy strip for automobile heat insulation cover and manufacturing method thereof |
| CN104894442A (en) * | 2015-05-05 | 2015-09-09 | 山东南山铝业股份有限公司 | Aluminum alloy sheet material for vehicles and preparation method thereof |
| CN105039804A (en) * | 2015-08-10 | 2015-11-11 | 北京工业大学 | Strengthened Er/Sc/Zr composite microalloyed Al-6Mg-0.4Mn alloy resistant to long-term intercrystalline corrosion |
| CN105525167A (en) * | 2016-02-05 | 2016-04-27 | 中铝瑞闽股份有限公司 | Aluminum alloy strip for ultrahigh-strength anodic oxidation and preparation method thereof |
| CN105525166A (en) * | 2016-02-05 | 2016-04-27 | 中铝瑞闽股份有限公司 | Aluminum alloy strip for anodic oxidation and preparation method thereof |
| CN105624483A (en) * | 2016-02-05 | 2016-06-01 | 中铝瑞闽股份有限公司 | Moderate-strength aluminum alloy strip used for anodic oxidation and preparation method of moderate-strength aluminum alloy strip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117265303A (en) * | 2023-11-21 | 2023-12-22 | 中铝材料应用研究院有限公司 | Aluminum alloy plate strip and preparation method thereof |
| CN117265303B (en) * | 2023-11-21 | 2024-03-12 | 中铝材料应用研究院有限公司 | Aluminum alloy plate strip and preparation method thereof |
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Application publication date: 20171107 |
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