CN106637006B - The method for improving 5052 aluminium alloy cold rolling state plasticity - Google Patents
The method for improving 5052 aluminium alloy cold rolling state plasticity Download PDFInfo
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- CN106637006B CN106637006B CN201710001673.2A CN201710001673A CN106637006B CN 106637006 B CN106637006 B CN 106637006B CN 201710001673 A CN201710001673 A CN 201710001673A CN 106637006 B CN106637006 B CN 106637006B
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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Abstract
The invention discloses a kind of method for improving 5052 aluminium alloy cold rolling state plasticity, it is related to metal working technical area, this method is 0.01~0.05%Sr of addition into 5052 aluminium alloys, the slab of recrystallization state is prepared by hot rolling, heat treatment step, by the cold rolling in two steps of obtained slab, surface temperature when controlling the slab to enter milling train is 61~90 DEG C；First step cold rolling reduction ratio is 70~75%, and an intermediate annealing is carried out after first step cold rolling；Total reduction control after second step cold rolling is rolling to 0.2~0.8mm thickness 95~98%.The present invention solves the problems, such as that existing 5052 aluminium alloy cold rolling state plasticity is poor.
Description
Technical field
The present invention relates to metal working technical area, especially a kind of method for improving 5052 aluminium alloy plasticity.
Background technology
5052 aluminium alloys have the characteristics that moderate strength, excellent welding performance and corrosion resistance are good, are widely used in aviation
The fields such as space flight, Shipping, building decoration, it is one of important materials for preparing LNG cargo ships.But in 5052 aluminium alloys
Mg contents are higher, and stress corrosion easily occurs in plastic processing and ftractures；In addition in fusion-casting process, the iron member in alloy
Element is easily combined with other elements generates thick iron phase, triggers stress concentration, difficulty is brought to deformation.Therefore 5052 aluminium alloys
Easily ftractureed during cold-rolling deformation, plasticity is poor after being processed into cold rolled sheet, especially the higher material of cold deformation rate.Cause
This, improving 5052 aluminium alloy cold rolling state plasticity, there is very important Practical Project to be worth.At present, 5052 aluminium alloy cold rollings are improved
The method of state plasticity mainly has alloy element component optimization, processing technology optimization and microalloying, and first two method is in the industry
It is relatively conventional, but caused effect is limited.
The content of the invention
It is an object of the invention to provide a kind of method for improving 5052 aluminium alloy cold rolling state plasticity, this method can solve
The problem of existing 5052 aluminium alloy cold rolling state plasticity is poor.
In order to solve the above problems, the technical solution adopted by the present invention is：5052 aluminium alloy cold rolling state plasticity of this raising
Method be into 5052 aluminium alloys addition 0.01~0.05%Sr, pass through hot rolling, heat treatment step prepare recrystallization state plate
Base, by the cold rolling in two steps of obtained slab, surface temperature when controlling the slab to enter milling train is 61~90 DEG C, first step cold rolling
Lower rate is 70~75%, and an intermediate annealing is carried out after first step cold rolling；Total reduction control after second step cold rolling 95~
98%, it is rolling to 0.2~0.8mm thickness.
In the technical scheme of the method for the above-mentioned aluminium alloy cold rolling state plasticity of raising 5052, more specifically technical scheme can be with
It is：The rolling pass of first step cold rolling and the second cold rolling is more than twice.
Further, the intermediate anneal temperature after first step cold rolling is 350~380 DEG C, 1~1.5h of soaking time.
The present invention adds Sr into 5052 aluminium alloys, and mainly value Sr has suppression, refining effect to iron phase, and passes through
Appropriate plastic deformation, liftings of the Sr to 5052 cold-rolled aluminum alloy sheet plasticity will be embodied.
In order to lift the plasticity of 5052 cold-rolled aluminum alloy sheets, it is necessary to consider two influence factors：When the Mg of high content
Influence；Second, the stress concentration that iron phase has influenceed.
Before cold rolling, 5052 aluminum alloy plate materials have undergone hot rolling deformation, and sheet metal thickness is thinned, and Mg distribution is more
Add uniformly.Because deformation heat causes sheet material temperature to raise in cold-rolled process, 150 DEG C or so are can reach, if sheet material temperature mistake
Height, easily cause Mg to aoxidize, so as to form through wall flaw, cause sheet material to be broken.Therefore, propose that sheet material enters in the present invention to roll
Surface temperature control is not higher than 100 DEG C during machine.
At the same time, with the aggravation of cold-rolling deformation, inside sheet material, the stress situation especially around iron phase distributed area is got over
Come more complicated, the stress concentration phenomenon triggered also significantly, if temperature is too low, concentrate and crack by easy stress.Cause
This, the present invention proposes that surface temperature control is not less than 50 DEG C when sheet material enters milling train, suitably discharges stress.Meanwhile in order to avoid
Cumulative stress in the operation of rolling causes crackle, and cold-rolled process is allocated as into two steps during cold rolling of the present invention is carried out, and is arranged in centre
Intermediate annealing, it is intended that reduce or eliminate this stress influence, ensure that cold deformation can be smoothed out down.
By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：Pass through micro- conjunction
Aurification is combined with process system improves 5052 aluminium alloy cold rolling state plasticity, cold rolling state sheet material tensile strength, yield strength difference
0.3~7.1%, 0.3~10.2% is improved, while the strength of materials raises, elongation percentage improves 61.1~113.3%.
Embodiment
With reference to embodiment, the invention will be further described：
Embodiment 1
It is as follows that the present embodiment improves the step of method of 5052 aluminium alloy cold rolling state plasticity：Add into 5052 aluminum alloy slabs
Add 0.01%Sr, the slab of recrystallization state, slab thickness 10mm, by obtained slab point are prepared by hot rolling, heat treatment step
Two step cold rollings, through three rolling passes, surface temperature when controlling the slab to enter milling train is 63 DEG C, and sheet material is rolled for first step cold rolling
System is thick to 2.5mm, and an intermediate annealing is carried out after first step cold rolling, and intermediate anneal temperature is 350 DEG C, soaking time 1.5h；
Second step cold rolling is through three rolling passes, and surface temperature when controlling the slab to enter milling train is 66 DEG C, by plate rolling to 0.2mm
It is thick.
Embodiment 2
The present embodiment adds 0.03%Sr into 5052 aluminum alloy slabs, and surface temperature when slab enters milling train is 61 DEG C,
Sheet material surface temperature is 65 DEG C before second of cold rolling, remaining feature and the phase of embodiment 1.
Embodiment 3
The present embodiment adds 0.05%Sr into 5052 aluminum alloy slabs, and surface temperature when slab enters milling train is 62 DEG C,
Remaining feature is same as Example 1.
Embodiment 4
It is as follows that the present embodiment improves the step of method of 5052 aluminium alloy cold rolling state plasticity：Add into 5052 aluminum alloy slabs
Add 0.01%Sr, the slab of recrystallization state, slab thickness 16mm, by obtained slab point are prepared by hot rolling, heat treatment step
Two step cold rollings, through three rolling passes, surface temperature when controlling the slab to enter milling train is 90 DEG C, and sheet material is rolled for first step cold rolling
System is thick to 4.8mm, and an intermediate annealing is carried out after first step cold rolling, and intermediate anneal temperature is 380 DEG C, soaking time 1h；The
Two step cold rollings are through three rolling passes, and surface temperature when controlling the slab to enter milling train is 89 DEG C, by plate rolling to 0.8mm
It is thick.
Embodiment 5
The present embodiment adds 0.03%Sr into 5052 aluminum alloy slabs, and surface temperature when slab enters milling train is 89 DEG C,
Sheet material surface temperature is 88 DEG C before second of cold rolling, and remaining feature is same as Example 4.
Embodiment 6
The present embodiment adds 0.05%Sr into 5052 aluminum alloy slabs, and surface temperature when slab enters milling train is 89 DEG C,
Sheet material surface temperature is 90 DEG C before second of cold rolling, and remaining feature is same as Example 4.
Embodiment 7
It is as follows that the present embodiment improves the step of method of 5052 aluminium alloy cold rolling state plasticity：Add into 5052 aluminum alloy slabs
Add 0.01%Sr, the slab of recrystallization state, slab thickness 10mm, by obtained slab point are prepared by hot rolling, heat treatment step
Two step cold rollings, through two rolling passes, surface temperature when controlling the slab to enter milling train is 70 DEG C, and sheet material is rolled for first step cold rolling
System is thick to 2.8mm, and an intermediate annealing is carried out after first step cold rolling, and intermediate anneal temperature is 360 DEG C, soaking time 1.2h；
Second step cold rolling is through two rolling passes, and surface temperature when controlling the slab to enter milling train is 77 DEG C, by plate rolling to 0.5mm
It is thick.
Embodiment 8
The present embodiment adds 0.03%Sr into 5052 aluminum alloy slabs, and surface temperature when slab enters milling train is 71 DEG C,
Sheet material surface temperature is 78 DEG C before second of cold rolling, and remaining feature is same as Example 7.
Embodiment 9
The present embodiment adds 0.05%Sr into 5052 aluminum alloy slabs, and surface temperature when slab enters milling train is 71 DEG C,
Remaining feature is same as Example 7.
The chemical composition of the comparative example of table 1 and embodiment（Mass fraction/%）：
From the chemical composition of table 1 relatively from the point of view of, the main distinction of the embodiment of the present invention and comparative example alloy is in the alloy
Add Sr.
Comparative example 1
The alloying component of comparative example 1 is as shown in table 1, and the slab of recrystallization state, slab are prepared by hot rolling, heat treatment step
Thickness is 10mm, and by the cold rolling in two steps of obtained slab, surface temperature when controlling the slab to enter milling train is 125 DEG C, the first step
Cold rolling, by plate rolling to 2.8mm thickness, carries out an intermediate annealing, centre through two rolling passes after first step cold rolling
Annealing temperature is 350 DEG C, soaking time 1.5h；Sheet material surface temperature is 125 DEG C before second of cold rolling, and second step cold rolling is through three
Rolling pass is thick to 0.2mm by plate rolling.
Comparative example 2
The alloying component of comparative example 2 is as shown in table 1, and the slab of recrystallization state, slab are prepared by hot rolling, heat treatment step
Thickness is 16mm, and by the cold rolling in two steps of obtained slab, surface temperature when controlling the slab to enter milling train is 30 DEG C, and the first step is cold
Roll through three rolling passes, plate rolling is thick to 4.8mm, an intermediate annealing, intermediate annealing are carried out after first step cold rolling
Temperature is 400 DEG C, soaking time 1h；Sheet material surface temperature is 30 DEG C before second of cold rolling, and second step cold rolling is through three rolling roads
It is secondary, plate rolling is thick to 0.8mm.
Comparative example 3
The alloying component of comparative example 3 is as shown in table 1, the slab for recrystallizing state, plate are prepared by hot rolling, heat treatment step
Base thickness is 10mm, and by the cold rolling in two steps of obtained slab, surface temperature when controlling the slab to enter milling train is 71 DEG C, the first step
Cold rolling, by plate rolling to 1.5mm thickness, carries out an intermediate annealing, centre is moved back through four rolling passes after first step cold rolling
Fiery temperature is 360 DEG C, soaking time 1.2h；Sheet material surface temperature is 77 DEG C before second of cold rolling, and second step cold rolling is rolled through one
Passage processed is thick to 0.5mm by plate rolling.
The mechanical performance index of the comparative example of table 2 and embodiment：
It can be seen from table 2, intensity of the embodiment of the present invention is higher than comparative example, and elongation percentage is higher than comparative example.
Claims (3)
- A kind of 1. method for improving 5052 aluminium alloy cold rolling state plasticity, it is characterised in that：Into 5052 aluminium alloys addition 0.01~ 0.05%Sr, the slab of recrystallization state is prepared by hot rolling, heat treatment step, by the cold rolling in two steps of obtained slab, control slab It it is 61~90 DEG C into surface temperature during milling train；First step cold rolling reduction ratio is 70~75%, and one is carried out after first step cold rolling Secondary intermediate annealing；Total reduction control after second step cold rolling is rolling to 0.2~0.8mm thickness 95~98%.
- 2. the method according to claim 1 for improving 5052 aluminium alloy cold rolling state plasticity, it is characterized in that：First step cold rolling and The rolling pass of second cold rolling is more than twice.
- 3. the method according to claim 1 or 2 for improving 5052 aluminium alloy cold rolling state plasticity, it is characterized in that：The first step is cold Intermediate anneal temperature after rolling is 350~380 DEG C, 1~1.5h of soaking time.
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| CN201710001673.2A CN106637006B (en) | 2017-01-03 | 2017-01-03 | The method for improving 5052 aluminium alloy cold rolling state plasticity |
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| CN201710001673.2A CN106637006B (en) | 2017-01-03 | 2017-01-03 | The method for improving 5052 aluminium alloy cold rolling state plasticity |
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| CN106637006B true CN106637006B (en) | 2018-03-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS62124254A (en) * | 1985-11-22 | 1987-06-05 | Kobe Steel Ltd | Aluminum alloy sheet for packaging and its production |
| JP2009108409A (en) * | 2007-10-12 | 2009-05-21 | Hitachi Metals Ltd | Al-Mg TYPE ALUMINUM ALLOY FOR FORGING, WITH EXCELLENT TOUGHNESS, AND CAST MEMBER COMPOSED THEREOF |
| CN101935786B (en) * | 2010-08-16 | 2012-06-13 | 浙江巨科铝业有限公司 | Stabilizing processing method of 5052 aluminium alloy |
| CN103008342B (en) * | 2012-12-27 | 2015-06-17 | 亚洲铝业（中国）有限公司 | Production method of 5052-H32 aluminum alloy plate-strip |
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