CN109930038A - A kind of deformation heat treatment method of Al-Mg-Zn sheet alloy - Google Patents
A kind of deformation heat treatment method of Al-Mg-Zn sheet alloy Download PDFInfo
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 200
- 239000000956 alloy Substances 0.000 title claims abstract description 200
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 91
- 238000004321 preservation Methods 0.000 claims abstract description 79
- 238000005097 cold rolling Methods 0.000 claims abstract description 74
- 238000001953 recrystallisation Methods 0.000 claims abstract description 43
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 22
- 230000007797 corrosion Effects 0.000 abstract description 21
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 description 33
- 230000000052 comparative effect Effects 0.000 description 32
- 230000000930 thermomechanical effect Effects 0.000 description 6
- 229910018134 Al-Mg Inorganic materials 0.000 description 4
- 229910018467 Al—Mg Inorganic materials 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- YIWGJFPJRAEKMK-UHFFFAOYSA-N 1-(2H-benzotriazol-5-yl)-3-methyl-8-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carbonyl]-1,3,8-triazaspiro[4.5]decane-2,4-dione Chemical compound CN1C(=O)N(c2ccc3n[nH]nc3c2)C2(CCN(CC2)C(=O)c2cnc(NCc3cccc(OC(F)(F)F)c3)nc2)C1=O YIWGJFPJRAEKMK-UHFFFAOYSA-N 0.000 description 1
- PQVHMOLNSYFXIJ-UHFFFAOYSA-N 4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]pyrazole-3-carboxylic acid Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(N1CC2=C(CC1)NN=N2)=O)C(=O)O PQVHMOLNSYFXIJ-UHFFFAOYSA-N 0.000 description 1
- 229910019580 Cr Zr Inorganic materials 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
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- 239000011159 matrix material Substances 0.000 description 1
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- 230000001737 promoting effect Effects 0.000 description 1
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- 230000008313 sensitization Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The invention discloses a kind of deformation heat treatment methods of Al-Mg-Zn sheet alloy, belong to field of aluminum alloy heat treatment technology.Carry out cold rolling alloy hot rolled to Al-Mg-Zn then carries out recrystallization annealing in 370-380 DEG C of heat preservation 70-80min；First time cold rolling is carried out after cooling, using multi-pass cold rolling, deflection 20%-70%.Intermediate annealing process is carried out after once cold rolling, annealing temperature is 200-280 DEG C, annealing time 0.5-4h；Second of cold rolling, deflection 0%-50% are carried out after annealing.The present invention promotes T-phase to be uniformly precipitated in intra-die by deformation, Low Temperature Heat Treatment and the heat treatment process of deformation again, and by cold-rolling deformation twice, makes alloy while the good corrosion resistance having with outstanding mechanical property.In addition, this production process is simple, and it is easy to operate, it adapts in industrial production.Solves the problems, such as the disadvantages of sheet alloy poor mechanical property in existing Al-Mg-Zn sheet alloy, corrosion resistance is undesirable.
Description
Technical field
The invention belongs to field of aluminum alloy heat treatment technology more particularly to a kind of raising aluminum alloy plate materials intensity, corrosion-resistant
Thermomechanical treatment process method.
Background technique
With the development of Shipping industry, people are for the mechanical property of ship aluminium alloy and wanting for corrosion resistance
It asks and is being continuously improved, in order to meet the requirement to performance, ship is also constantly being mentioned with the content of Mg, Zn element in aluminum alloy plate materials
It rises.Although wherein the increase of Mg constituent content improves the mechanical property of alloy to a certain extent, Mg content is greater than 3%
When, β-Al is precipitated in crystal boundary in Mg atoms3Mg2.Since the current potential of β phase is lower than matrix current potential, easily it is preferential occur corrosion to
The corrosion resistance of Al-Mg alloy is reduced to a certain extent.Current AA5059 alloy widely used in the world, mechanical property
(H321/116 state alloy yield strength be 370MPa, tensile strength 270MPa, elongation percentage 10%) and corrosion resistance all compared with
Previous alloy increases.Patent of invention ZL201410117124.8 on the basis of AA5059 alloy, by Mg in optimized alloy,
Zn content discloses new A l-Mg-Zn series alloy, i.e. 5B59 alloy.The yield strength of alloy reaches 270-280MPa, resists
Tensile strength reaches 370-390MPa, and intercrystalline corrosion mass loss is lower than 15mg/cm2.ZL201410381094.1 passes through in raising
Cold rolling reduction before stating alloy stabilization processes significantly improves under the premise of keeping corrosion resisting property and 10% elongation percentage
The intensity of alloy, wherein yield strength reaches 320-350MPa, tensile strength reaches 400-415MPa.Nevertheless, above-mentioned
Alloy remains difficult to meet the high-strength needs for being still difficult to meet shipping industry continuous development.
5xxx line aluminium alloy belongs to not heat-treatable strengthened alloy, and solution strengthening and the cold-working for relying primarily on Mg atom are hard
Change the reinforcing for carrying out alloy.Therefore the general processing technology of ship aluminum alloy plate materials at this stage are as follows: (1) deformation process: cold rolling
It is a kind of process for increasing deformation.Although the processing method can effectively improve the mechanical property of alloy, due to cold
Any heat treatment is not carried out to alloy after rolling, alloy state is more unstable, is not particularly suited for the alloy of production long service
Plate；(2) technique of stabilizing annealing deformation+stabilization processes: is carried out after once cold rolling.The processing method carries out after cold rolling
Stabilizing annealing, improves the corrosion resistance of alloy, but due in annealing process reply and partial, re-crystallization, often lead
Cause the relative drop of alloy mechanical property.For above-mentioned now there are two types of the deficiency of process, the present invention proposes a kind of new Al-
The production and processing technology of Mg sheet alloy is able to solve problems of the prior art, obtains while having outstanding mechanical property
It can be with the sheet alloy of corrosion resistance.
Summary of the invention
The purpose of the present invention is to provide a kind of thermomechanical treatment process of anti-corrosion Al-Mg-Zn sheet alloy.Pass through the work
Skill enables aluminum alloy to also have preferable corrosion resistance while with outstanding mechanical property.
A kind of deformation heat treatment method of Al-Mg-Zn sheet alloy, comprising the following steps:
(1) carry out cold rolling alloy hot rolled to Al-Mg-Zn is then recrystallized in 370-380 DEG C of heat preservation 70-80min
Annealing；
(2) first time cold rolling is carried out to the resulting aluminum alloy plate materials of step (1), using multi-pass cold rolling, deflection is
20%-70%；
(3) intermediate annealing process is carried out to the resulting cold-rolled aluminum alloy sheet of step (2), annealing temperature is 200-280 DEG C, is moved back
The fiery time is 0.5-4h；
(4) second of cold rolling, cold rolling reduction 0%-50% are carried out to aluminum alloy plate materials obtained by step (3).
Further, step (2) the first time cold rolling reduction is 40%-60%.
Further, step (3) intermediate anneal temperature is 250 DEG C of -280 DEG C of heat preservation 1-2h.
Further, step (4) second of cold rolling reduction is 5%-20%.
Further, the chemical component of alloy as described above is 4.0-7.0Mg, 0-2Zn, 0-0.4Cu, 0-1.0Mn, 0-
0.15Ti, 0-0.2Zr, 0-0.4Fe, 0-0.4Si, surplus Al.
The processing method can effectively improve the microstructure of Al-Mg (- Zn) alloy: by promoting β phase or T-phase in crystalline substance
Intragranular portion is uniformly precipitated, is discontinuously precipitated in crystal boundary, the effective corrosion resistance for improving alloy.Pass through big cold-rolling deformation for the first time
And the cold rolling again after intermediate annealing, make alloy that there is well processed hardening effect and obtain more excellent mechanical property.Cause
This uses the sheet alloy obtained after this kind of thermomechanical treatment process: relative to simple cold-rolling process, often having more excellent
Stability, corrosion resistance；Relative to deformation+stabilization process, then there is higher mechanical property.Existing life is made up well
The deficiency of processing technology is produced, and then obtains while having the sheet alloy of outstanding mechanical property and corrosion resistance.The production
Simple process, it is easy to operate, it is suitable for industrial production.
Specific embodiment
Below with reference to comparative example and embodiment, the present invention is further elaborated.
3 kinds of Al-Mg alloys are melted out in laboratory scope, chemical component is as shown in table 1, and alloy is moved back through homogenization
Hot rolling fight to 6mm.Different thermomechanical treatment process is used to the plate after hot rolling, as shown in table 2.Then plate is existed
100 DEG C of heat preservation 7d carry out sensitized treatment.
The specific chemical composition (wt%) of the implementation alloy of table 1
| Alloy number | Mg | Zn | Mn | Cu | Cr | Zr | Ti | Fe | Si |
| 1# | 5.80 | 0.00 | 0.50 | 0.05 | 0.03 | 0.15 | 0.07 | 0.15 | 0.15 |
| 2# | 5.80 | 1.00 | 0.50 | 0.05 | 0.03 | 0.15 | 0.07 | 0.15 | 0.15 |
| 3# | 5.80 | 1.00 | 0.50 | - | 0.03 | 0.15 | 0.07 | - | - |
Preparation method used by table 2 alloy 1# and 2#
Comparative example 1:
3.13mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.
Comparative example 2:
It carries out being cold-rolled to 3.13mm by the 2# of 6mm thickness is alloy hot rolled.Then recrystallized in 375 DEG C of heat preservation 75min
Annealing.Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.
Comparative example 3:
3.33mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 25%, finish to gauge is with a thickness of 2.5mm.
Comparative example 4:
3.75mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 30%, finish to gauge is with a thickness of 2.5mm.
Comparative example 5:
3.85mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 35%, finish to gauge is with a thickness of 2.5mm.
Comparative example 6:
4.17mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 40%, finish to gauge is with a thickness of 2.5mm.
Comparative example 7:
4.55mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 45%, finish to gauge is with a thickness of 2.5mm.
Comparative example 8:
5.00mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 50%, finish to gauge is with a thickness of 2.5mm.
Comparative example 9:
5.56mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 55%, finish to gauge is with a thickness of 2.5mm.
Comparative example 10:
3.13mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.Then by sheet alloy 210
DEG C heat preservation 2h carry out stabilizing annealing processing.
Comparative example 11:
3.13mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.Then by sheet alloy 240
DEG C heat preservation 2h carry out stabilizing annealing processing.
Comparative example 12:
3.13mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.Then by sheet alloy 270
DEG C heat preservation 2h carry out stabilizing annealing processing.
Comparative example 13:
3.13mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.Then by sheet alloy 210
DEG C heat preservation 2h carry out stabilizing annealing processing.
Comparative example 14:
3.13mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.Then by sheet alloy 240
DEG C heat preservation 2h carry out stabilizing annealing processing.
Comparative example 15:
3.13mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Then sheet alloy is subjected to the cold-rolling deformation that deflection is 20%, finish to gauge is with a thickness of 2.5mm.Then by sheet alloy 270
DEG C heat preservation 2h carry out stabilizing annealing processing.
Comparative example 16:
4.27mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 35%.Sheet alloy is carried out at stabilizing annealing in 210 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 17:
4.27mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 35%.Sheet alloy is carried out at stabilizing annealing in 240 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 18:
4.27mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 35%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 19:
4.46mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 3.57mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 210 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 30% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 20:
4.46mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 3.57mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 240 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 30% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 21:
4.46mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 3.57mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 30% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 22:
5.55mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 210 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 23:
5.55mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 240 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 24:
5.55mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Comparative example 25:
5.55mm is cold-rolled to by the 1# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 1h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 1:
4.27mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 35%.Sheet alloy is carried out at stabilizing annealing in 210 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 2:
4.27mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 35%.Sheet alloy is carried out at stabilizing annealing in 240 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 3:
4.27mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 35%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 4:
4.46mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 3.57mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 210 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 30% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 5:
4.46mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 3.57mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 240 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 30% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 6:
4.46mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 3.57mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 30% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 7:
5.68mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 4.54mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 210 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 45% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 8:
5.68mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 4.54mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 240 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 45% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 9:
5.68mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 4.54mm, deflection 20%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 45% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 10:
5.55mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 210 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 11:
5.55mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 240 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 12:
5.55mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 2h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
Embodiment 13:
5.55mm is cold-rolled to by the 2# of 6mm thickness is alloy hot rolled.Then recrystallization annealing is carried out in 375 DEG C of heat preservation 75min.
Sheet alloy is cold rolled to 2.78mm, deflection 50%.Sheet alloy is carried out at stabilizing annealing in 270 DEG C of heat preservation 1h
Reason.Then sheet alloy is carried out deflection is 10% second of cold rolling, and finish to gauge is with a thickness of 2.5mm.
The mechanical property and corrosion resisting property of alloy 1# and 2# under 3 different process of table
Table 3 list the hardness, intensity and intercrystalline corrosion that sheet alloy is prepared using the above method it is weightless (according to
ASTMG66 method measurement).The result shows that compared with " traditional deformation process " technique of comparative example 1-9, after thermomechanical treatment
Although alloy strength is declined slightly, but intergranular corrosion resistance performance has been significantly improved；With " the deformation+steady of comparative example 10-15
Determining processing " technique is compared, and alloy effectively enhances mechanical property while guaranteeing that corrosion resistance does not reduce.As a result
Show to carry out first time cold rolling using aximal deformation value (50%) and combines the stabilizing annealing (270 DEG C/1h) of higher temperature that can make
T-phase is discontinuously precipitated in transgranular homogeneous precipitation, crystal boundary, carries out second of cold rolling (5-10%) of small deformation amount finally to make up stabilization
The intensity that annealing is lost.Minimum weightless value after alloy sensitization reaches 31mg/cm2, it is significantly better than the alloy of other techniques.With
Above the experimental results showed that, by thermomechanical treatment process, the deficiency of existing production technology can be effectively made up, Al-Mg alloy is made
Mechanical property and corrosion resistance are improved simultaneously.Table 4 lists the processing preparation process of alloy 3#.
Preparation process used by 4 alloy 3# of table
| Example | Alloy number | Processing mode |
| Comparative example 26 | 3# | (50%)+270 DEG C/1h of cold-rolling deformation |
| Comparative example 27 | 3# | (60%)+270 DEG C/1h of cold-rolling deformation |
| Embodiment 24 | 3# | Cold-rolling deformation first time, cold-rolling deformation (50%)+270 DEG C/1h+ first time (5%) |
Comparative example 26:
The 3# of 6mm thickness is alloy hot rolled in 375 DEG C of heat preservation 75min progress recrystallization annealings.Then by sheet alloy into
The cold-rolling deformation that row deflection is 50%, finish to gauge is with a thickness of 3.0mm.Then sheet alloy is stablized in 270 DEG C of heat preservation 1h
Annealing processing.
Comparative example 27:
The 3# of 6mm thickness is alloy hot rolled in 375 DEG C of heat preservation 75min progress recrystallization annealings.Then by sheet alloy into
The cold-rolling deformation that row deflection is 60%, finish to gauge is with a thickness of 2.4mm.Then sheet alloy is stablized in 270 DEG C of heat preservation 1h
Annealing processing.
Embodiment 24:
The 3# of 6mm thickness is alloy hot rolled in 375 DEG C of heat preservation 75min progress recrystallization annealings.Sheet alloy is cold rolled to
3.0mm, deflection 50%.Sheet alloy is subjected to stabilizing annealing processing in 270 DEG C of heat preservation 1h.Then by sheet alloy into
Row deflection is 5% second of cold rolling, and finish to gauge is with a thickness of 2.85mm.
The mechanical property and corrosion resisting property of 5 alloy 3# of table
Technological parameter of the present invention is not limited only to several concrete technologies selected in embodiment, in the parameter model
It encloses and interior can reach same effect.
Claims (5)
1. a kind of deformation heat treatment method of Al-Mg-Zn sheet alloy, which comprises the following steps:
(1) carry out cold rolling alloy hot rolled to Al-Mg-Zn then carries out recrystallization in 370-380 DEG C of heat preservation 70-80min and moves back
Fire；
(2) first time cold rolling is carried out to the resulting aluminum alloy plate materials of step (1), using multi-pass cold rolling, deflection 20%-
70%；
(3) intermediate annealing process is carried out to the resulting cold-rolled aluminum alloy sheet of step (2), annealing temperature is 200-280 DEG C, when annealing
Between be 0.5-4h；
(4) second of cold rolling, cold rolling reduction 0%-50% are carried out to aluminum alloy plate materials obtained by step (3).
2. the deformation heat treatment method of Al-Mg-Zn sheet alloy described in accordance with the claim 1, it is characterised in that step (2)
Once cold rolling deflection is 40%-60%.
3. the deformation heat treatment method of Al-Mg-Zn sheet alloy described in accordance with the claim 1, it is characterised in that in step (3)
Between annealing temperature be 250 DEG C of -280 DEG C of heat preservation 1-2h.
4. the deformation heat treatment method of Al-Mg-Zn sheet alloy described in accordance with the claim 1, it is characterised in that step (4)
Secondary cold-rolling deflection is 5%-20%.
5. the deformation heat treatment method of Al-Mg-Zn sheet alloy according to claim 1, it is characterised in that the alloy
Chemical component be 4.0-7.0Mg, 0-2Zn, 0-0.4Cu, 0-1.0Mn, 0-0.15Ti, 0-0.2Zr, 0-0.4Fe, 0-0.4Si,
Surplus is Al.
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