CN108326051B - A kind of aluminum alloy plate materials coupling process of preparing - Google Patents
A kind of aluminum alloy plate materials coupling process of preparing Download PDFInfo
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- CN108326051B CN108326051B CN201810084659.8A CN201810084659A CN108326051B CN 108326051 B CN108326051 B CN 108326051B CN 201810084659 A CN201810084659 A CN 201810084659A CN 108326051 B CN108326051 B CN 108326051B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
- B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
Abstract
Control cooling and controlled rolling field the present invention relates to aluminium sheet production are related to a kind of aluminum alloy plate materials coupling process of preparing.The problem of heavy plate rolling maximum is exactly that compression ratio is small, deformation is difficult to penetrate into center portion when rolling, cause center portion and Crystallite Sizes On The Surface difference larger, the present invention is in the way of cooling passage, coupling control with cooling for rolling to aluminium sheet, realize good differential temperature effect of rolling, the refinement for promoting surface microstructure enhances deformation permeability, improves center portion quality, the flatness defects such as the lateral Double drum type of rolled piece are improved, lumber recovery is improved.
Description
Technical field
The present invention relates to the raw Rolling Production fields of aluminium sheet, and in particular to cooling technique carrys out controlled rolling between a kind of application passage
Method.
Background technique
The segregation of think gauge slab is serious when this programme is for 5182 aluminium alloy pair rolling, central tissue is coarse, causes
The following quality in surface layer and surface quality are inconsistent, and requirement is not achieved in intensity hardness.Compression ratio is small when conventional heavy plate rolling, leads
The problems such as mutagens shape poor permeability, core defect are difficult to eliminate, and lateral Double drum type defect, edge fold is serious, and lumber recovery is lower,
Rolled piece temperature is uncontrollable, and structure property uniformity is poor.In recent years, the research of " temperature control-deformation " coupling control is especially prominent, by
Gradually become the important method for improving product quality performance.For the think gauge rolling of aluminium alloy, it is equally applicable controlled rolling
With the cooling coupling technique of control.Cooling technique refers to and is cooled down before the rolling between passage, and cooling has little time to be deep into slab
Portion is upwardly formed upper layer low temperature in slab thickness side, and central core still maintains the temperature distribution state of high temperature.It is rolling in this way
When, upper and lower surface temperature is lower than core, and resistance of deformation is big, it is unlikely to deform, and core temperature is high, is easily deformed.This will promote
Deformation is deep into slab core, is conducive to eliminate core defect, improves core quality, while reducing or eliminating since deformation can not
Double drum type defect caused by deeply or even edge fold, and improve lumber recovery.Water cooling technology can satisfy equipment arrangement spirit simultaneously
It lives, intensity of cooling is big, cooling rate control range is wide, cooling performance wants good, accurate temperature control etc. to require.Due to carrying out
Between passage when cold rolling, surface rapid cooling, temperature has little time to be deep into inside slab, and upper and lower surface low temperature belongs to low temperature controlled rolling,
And slab center still maintains original higher temperature to roll, and thus will form the aluminium sheet of surface grain refining.
Summary of the invention
In order to overcome the problems, such as technical field, the purpose of the present invention is to provide a kind of application " cooling+big pressures between passage
Rolling " technique coupling prepares the controlled rolling method of aluminium alloy, mainly by calculating simulation software, formulates rolling mill practice rule
Journey, progress " pressure rolling cooling between passage+big " rolling simulation, by cooling time between change passage, when obtaining different cooling
Between under blank temperature field, stress-strain field and the infiltrative comparing result of deformation, formulated according to result optimal " between passage cold
But-big depress rolls " coupling process of preparing.Solve central tissue in the case of conventional heavy plate rolling is coarse, heart table quality not
Unanimously, the low problem of intensity hardness, to meet the performance requirement of product.
The specific technical proposal is:
A kind of aluminum alloy plate materials " pressure rolling cooling between passage-big " coupling process of preparing, includes the following steps:
Step 1 is heated using resistance furnace, is heated to 450-480 DEG C, is kept the temperature 1-4h, is then carried out at this temperature
Rolling；
Step 2, rolling deformation carry out on two-roller reversible milling train, rolling parameter: mill speed 0.3-1.5m/s, by plate
Base is rolled down to target thickness according to differential temperature rolling procedure:
Slab is quickly transferred on rolling mill conveying roll (since the pyroconductivity of aluminium is big, for the temperature for keeping thickness direction
Gradient, therefore cannot enter after the cooling period before milling train and stop for a long time), cooling device is opened, allows slab to pass through with transfer roller cold
But device carries out water-spraying control to its upper and lower surface, and cooling time, 5-8s, carried out thermometric to its surface by temperature measuring device,
So that surface temperature is cooled to 250-270 DEG C, then rolled, reduction ratio is 15-25% per pass, rolls rear surface temperature and exists
300℃-320℃；Carried out under the cooling device of the other side cooling before the rolling of the second passage, cooling time, 2-4s, made its table
Face temperature is down to 230-250 DEG C, continues to roll, and the second passage back plate base surface temperature is 300-320 DEG C, continues to following table thereon
Face is cooled down, and cooling time, 1-3s, made surface temperature be down to 240-260 DEG C, carries out the rolling of third passage, slab thickness
It is rolled by original depth to 59~68mm, with the reduction of thickness, when carrying out water-spraying control to slab upper and lower surface, cooling is easy to
Be deep into inside slab so that the temperature change from surface to center portion is unobvious, and then between leading to passage cooling means to heart table
Tissue, intensity hardness and the infiltrative influence of deformation are smaller, so it is cooling between subsequent rolling no longer progress passage.
Further, cooling time is 6~8s before first passage is rolled in above-mentioned steps two, and cooling temperature is 250~260
℃。
Further, cooling time is 3~4s before second passage is rolled in above-mentioned steps two, and cooling temperature is 230~240
℃。
Further, cooling time is 1-3s before third passage is rolled in above-mentioned steps two, and cooling temperature is 240~250 DEG C.
In addition, before carrying out practical aluminum alloy plate materials " pressure rolling cooling between passage-big " coupling preparation process, it is first
It is first based on software for calculation, formulates rolling mill practice regulation, carries out " pressure cooling between passage+big " rolling simulation, then by changing road
Obtain blank temperature field, stress-strain field and the deformation infiltrative comparing result under different cooling times cooling time between secondary,
Optimal " cooling-big pressure rolling between passage " coupling process of preparing is formulated according to result, specifically:
1) in Calculation of Heat Transfer, the temperature of workpiece is only calculated, does not consider the temperature change of roll.Steel is simulated with simulation softward
The plate operation of rolling calculates to simplify, establishes a quarter of model as analytical calculation.Using Shape Rolling module,
Rolling type selects Lagrangian increment to roll type, carries out tetrahedral grid；
2) mold only includes home roll, and regards roll as rigid body, designs roll according to roller diameter and moulded dimension, fixed
The plane of symmetry and the speed of rolls of adopted roll；Setting blank temperature is and blank moulded dimension, the plane of symmetry and heat for defining blank are handed over
Change face；
3) pushing block is added in simulation process, in order to enable blank can smoothly enter into roll, and the speed of pushing block is far small
In mill speed, after pushing block is separated with blank, pushing block, that is, stop motion；Heat exchange does not occur between pushing block and blank；Setting
The coefficient of friction and the coefficient of heat conduction of blank and roll；Setting simulation control includes step number, time step；It checks and generates data
Library file；
4) simulate pre-treatment: setting grid draws criterion and activation target volume again；When cooling between carrying out passage, only retain
Heat exchange mode chooses the upper surface of model, and Heat transfer boundary will be deleted after the completion of cooling by carrying out the setting of Transfer Boundary Condition
Condition, and the boundary condition of environment heat exchange is made an addition to, deformation pattern is chosen again, carries out analog approach；
5) by changing cooling time between passage, obtain blank temperature field under different cooling times, stress-strain field and
Infiltrative comparing result is deformed, optimal " cooling-big pressure rolling between passage " coupling preparation process side is formulated according to result
Method.
" pressure rolling cooling between passage+big " rolling simulation method be based primarily upon steel plate in the heated operation of rolling needed in
Heat transfer theory formulate rolling mill practice regulation using DEFORM-3D software, carry out " pressure rolling cooling between passage+big " and roll
Molding is quasi-, by cooling time between change passage, obtains blank temperature field, stress-strain field and the deformation under different cooling times
Infiltrative comparing result formulates optimal " cooling-big pressure rolling between passage " coupling process of preparing according to result.
The equation of heat conduction during steel plate is required in the heated operation of rolling:
Wherein, ρ is density of material, kg/m3；C is specific heat capacity, J/ (kgK)；T is temperature, K；T is time, s；K is to pass
Hot coefficient, KW/ (m2K)；Q is inner heat source, J/ (m3s)。
Metal rolled, also by the rubbing action of rotary roller, these are the factors for causing temperature rise in addition to plastic deformation, modeling
Property deform caused by thermal change indicate are as follows:
Wherein, ξ is deformation heat transformation efficiency, is typically set to 0.9；For flow stress, Mpa；For strain rate, S-1。
Rolling the boundary condition between plate and roll includes connecing caused by frictional heat generation and the two articles temperature difference between surface
Touching heat transfer, indicates are as follows:
WhereinFor metal flow rates, mm/s；For frictional force, N；η is that the object absorption friction thermal efficiency (is usually set
For 0.9)；H is lubrication thermal transition efficiency；The temperature difference of the Δ t between two articles, K；dS1To roll contact infinitesimal face of the plate with roll
Product.
It rolls at room temperature, roll plate meeting because of heat loss through radiation and causes thermal loss with the heat loss through convection of air, indicate
For；
Wherein, hcFor convection transfer rate；TrFor room temperature, K；σ is that Boltzmann radiates Changshu；ε is surface emissivity；dS2
To roll contact unit dimension of the plate with air.
Beneficial effects of the present invention are to carry out accurate roll control by simulation softward, according to the thickness change of rolling, control
The process of refrigeration but, promotes deformation to be deep into slab core, is conducive to eliminate core defect, improves core quality, reduce simultaneously
Or eliminate due to deformation can not deeply caused by Double drum type defect or even edge fold, raising lumber recovery.Water cooling technology simultaneously
It can satisfy that equipment flexible arrangement, intensity of cooling are big, cooling rate control range is wide, cooling performance wants good, accurate temperature
Control etc. requires.Since when cold rolling, surface rapid cooling, temperature has little time to be deep into inside slab, upper following table between progress passage
Face low temperature belongs to low temperature controlled rolling, and slab center still maintains original higher temperature to roll, and thus will form surface grain refining
Aluminium sheet.Solve the problems, such as that central tissue is coarse, heart table quality is inconsistent, intensity hardness is low in the case of conventional heavy plate rolling, from
And meet the performance requirement of product.
Detailed description of the invention
Fig. 1 is the process layout of cooling and big pressure rolling between passage provided by this patent.
Fig. 2 is the modeler model of DEFORM-3D simulation.
Fig. 3 between passage 1 previous three passes of cold rolling technique it is thick to temperature curve；(a) the first passage, (b) second
Secondary (c) third passage.
Deformation permeability vs of the Fig. 4 between routine and passage after the first passage of cold rolling technique 1；It is (a) conventional,
(b) cold rolling technique 1 between passage.
Fig. 5 is the final products of pair rolling technique.
The final products of Fig. 6 cold rolling technique 1 between passage.
The final products of Fig. 7 cold rolling technique 2 between passage.
Fig. 8 is the microstructure on its surface layer, a quarter and core after annealed processing under pair rolling technique；(a) table
Layer, (b) a quarter, (c) core.
The microstructure on Fig. 9 its surface layer, a quarter and core after the annealed processing of cold rolling technique 1 between passage；
(a) surface layer, (b) a quarter, (c) core.
The microstructure on Figure 10 its surface layer, a quarter and core after the annealed processing of cold rolling technique 2 between passage.
(a) surface layer, (b) a quarter, (c) core.
In figure: water injection system on 101；102 slabs；103 rolls；104 lower water injection systems.
Specific embodiment
In Calculation of Heat Transfer, the temperature of workpiece is only calculated, does not consider the temperature change of roll.It is simulated with DEFORM-3D soft
Steel plate rolling process is simulated in part, is calculated to simplify, is established a quarter of model as analytical calculation, as shown in Figure 2.It adopts
With Shape Rolling module, rolling type selection Lagrangian (incremental) rolling, (Lagrangian increment rolls
Type processed), carry out tetrahedral grid.
Mold only includes home roll, and regards roll as rigid body, and roller temperature is set as 20 DEG C, according to roller diameter and model
Size design roll defines the plane of symmetry and the speed of rolls of roll.It is 450 DEG C that blank temperature, which is arranged, moulded dimension: length is generous
80mm × 80mm × 60mm defines the plane of symmetry and heat-exchange surface of blank.
A pushing block is added in simulation process, in order to enable blank can smoothly enter into roll, and the speed of pushing block is remote
Less than mill speed, after pushing block is separated with blank, pushing block, that is, stop motion.Heat exchange does not occur between pushing block and blank.If
Set the coefficient of friction and the coefficient of heat conduction of blank and roll.Setting simulation control: including step number, time step.It checks and generates
Database file.
Simulation pre-treatment: setting grid draws criterion and activation target volume again.When cooling between carrying out passage, to hook first
Fall deformation pattern, only retain heat exchange, choose the upper surface of model, carries out the setting of Transfer Boundary Condition and wanted after the completion of cooling
Transfer Boundary Condition is deleted, and makes an addition to the boundary condition of environment heat exchange, chooses deformation pattern again, carries out analog approach.
By cooling time between change passage, blank temperature field, stress-strain field and the change under different cooling times are obtained
The infiltrative comparing result of shape is as shown in Figure 3,4, formulates optimal " cooling-big pressure rolling between passage " coupling according to result and makes
Standby process.
According to simulation calculated result, the rolling experiment of aluminium alloy is carried out in an experiment, first in the box electricity of RX-30-10
It is heated in resistance furnace, heating temperature is 450 DEG C, keeps the temperature 2.5h, is rolled at this temperature.
Rolling deformation carries out on milling train, rolling parameter: mill speed 0.52m/s, and the slab rolling of 120mm thickness is arrived
5mm., cold rolling regulation between passage: 120 → 94 → 76 → 59 → 41 → 27 → 15 → 8.5 → 5 (mm), cooling is rolled between passage
The previous three passes of system carry out water-spraying control.
Aluminium alloy used in the embodiment is 5182 aluminium alloys, and size is: thickness 120mm, width 200mm, institute
With the parameter of milling train: roller diameter Φ 450mm, mill speed 0.52m/s.450 DEG C of heating temperature, 2.5 hours are kept the temperature, is routinely rolled
Regulation processed: 120 → 86 → 59 → 41 → 27 → 15 → 8.5 → 5 (mm), cold rolling regulation 1:120 → 94 → 76 between passage →
59 → 41 → 27 → 15 → 8.5 → 5 (mm), cold rolling regulation 2:120 → 100 → 82 → 68 → 56 → 48 → 38 between passage →
30 → 23 → 16 → 9 → 5 (mm) previous three passes carry out water-spraying control to slab upper and lower surface, and being cooled to skin temperature is 230-260
℃。
Example one
It uses through 450 DEG C of heating, keep the temperature 5182 aluminium alloys of 2.5h as rolling stock (plate thickness 120mm), pair rolling
Regulation is 120 → 86 → 59 → 41 → 27 → 15 → 8.5 → 5 (mm), by 450 DEG C of heating, the slab fast transfer of heat preservation 2.5h
To milling train position, as far as possible shortening transfer time, the heat losses in transfer process are reduced, are carried out on two-roller reversible milling train conventional
Rolling.Part finished product is taken to make annealing treatment through 370 DEG C/2h, surface layer, at 1/4 and the tissue of core is as shown in Figure 8.
Example two
Use 5182 aluminium alloys that 2.5h is heated, kept the temperature through 450 DEG C for rolling stock (plate thickness 120mm), rolling procedure is
120 → 94 → 76 → 59 → 41 → 27 → 15 → 8.5 → 5 (mm), 120mm slab is quickly transferred on rolling mill conveying roll (by
It is big in the pyroconductivity of aluminium, for the temperature gradient for keeping thickness direction, therefore cannot be after the cooling period into stopping before milling train for a long time
Stay), cooling device is opened, allows slab with roller by cooling device, to its upper and lower surface progress water-spraying control, cooling time is
6s carries out thermometric to its surface by temperature measuring device, so that surface temperature is cooled to 260 DEG C or so, then rolled, roll rear table
Face temperature at 310 DEG C -320 DEG C, carried out under the cooling device of the other side it is cooling before the rolling of the second passage, cooling time 3s,
So that its surface temperature is down to 240 DEG C or so, continue to roll, the second passage back plate base surface temperature is 310 DEG C or so, is continued to it
Upper and lower surface is cooled down, and cooling time is 1 second, and surface temperature is made to be down to 250 DEG C or so, carries out the rolling of third passage, plate
Base thickness rolls 59mm by 120mm, and with the reduction of thickness, when carrying out water-spraying control to slab upper and lower surface, cooling is easy to
Be deep into inside slab so that the temperature change from surface to core is unobvious, and then between leading to passage cooling means to heart table
Tissue, intensity hardness and the infiltrative influence of deformation are smaller.Part finished product is taken to make annealing treatment through 370 DEG C/2h, surface layer, 1/4
The tissue of place and core is as shown in Figure 9.
Example three
Use 5182 aluminium alloys that 2.5h is heated, kept the temperature through 450 DEG C for rolling stock (plate thickness 120mm), rolling procedure is
120mm slab is quickly transferred to milling train by 120 → 100 → 82 → 68 → 56 → 48 → 38 → 30 → 23 → 16 → 9 → 5 (mm)
(since the pyroconductivity of aluminium is big, to keep the temperature gradient of thickness direction, therefore milling train cannot be entered after the cooling period on transfer roller
Preceding long-time stops), cooling device is opened, allows slab with roller by cooling device, water-spraying control is carried out to its upper and lower surface, it is cold
But the time is 6s, carries out thermometric to its surface by temperature measuring device, so that surface temperature is cooled to 260 DEG C or so, then rolled
System, rolls rear surface temperature at 300 DEG C or so, carried out under the cooling device of the other side it is cooling before the rolling of the second passage, when cooling
Between be 3s, so that its surface temperature is down to 240 DEG C or so, continue to roll, the second passage back plate base surface temperature be 320 DEG C or so,
Continue to cool down its upper and lower surface, cooling time is 1 second, and surface temperature is made to be down to 250 DEG C or so, carries out third passage
Rolling, slab thickness roll 68mm by 120mm, cooling when carrying out water-spraying control to slab upper and lower surface with the reduction of thickness
It is easy to be deep into inside slab, so that the temperature change from surface to core is unobvious, and then leads to cooling means between passage
It is smaller on heart table organization, intensity hardness and the infiltrative influence of deformation.Part finished product is taken to make annealing treatment through 370 DEG C/2h, table
Layer, at 1/4 and the tissue of core is as shown in Figure 10.
Claims (8)
1. a kind of aluminum alloy plate materials couple process of preparing, which is characterized in that the coupling process of preparing is " cold between passage
But-big depress rolls " method, include the following steps:
Step 1 is heated using resistance furnace, is heated to 450-480 DEG C, is kept the temperature 1-4h, is then rolled at this temperature
System；
Step 2, rolling deformation carry out on two-roller reversible milling train, rolling parameter: mill speed 0.3-1.5m/s presses slab
Target thickness is rolled down to according to differential temperature rolling procedure:
Slab is quickly transferred on milling train conveying roller, cooling device is opened, allows slab with conveying roller by cooling device, to it
Upper and lower surface carries out water-spraying control, and 5-8s, carried out thermometric to its surface by temperature measuring device, kept surface temperature cold cooling time
But 250-270 DEG C is arrived, is rolled immediately after, reduction ratio is 15-25% per pass, rolls rear surface temperature at 300 DEG C -320
℃；Carried out under the cooling device of the other side cooling before the rolling of the second passage, cooling time, 2-4s, was down to its surface temperature
230-250 DEG C, continue to roll, the second passage back plate base surface temperature is 300-320 DEG C, continues to carry out its upper and lower surface cold
But, 1-3s cooling time makes surface temperature be down to 240-260 DEG C, carries out the rolling of third passage immediately, slab thickness is by first
Beginning, thickness 100-120mm was rolled to 59~68mm, and subsequent rolling no longer carries out cooling between passage.
2. a kind of aluminum alloy plate materials according to claim 1 couple process of preparing, which is characterized in that the in step 2
Cooling time is 6~8s before a time is rolled, and cooling temperature is 250~260 DEG C.
3. a kind of aluminum alloy plate materials according to claim 1 or 2 couple process of preparing, which is characterized in that step 2
In the second passage roll before cooling time be 3~4s, cooling temperature be 230~240 DEG C.
4. a kind of aluminum alloy plate materials according to claim 1 or 2 couple process of preparing, which is characterized in that step 2
Cooling temperature is 240~250 DEG C before middle third passage is rolled.
5. a kind of aluminum alloy plate materials according to claim 3 couple process of preparing, which is characterized in that the in step 2
Cooling temperature is 240~250 DEG C before three passages are rolled.
6. a kind of aluminum alloy plate materials coupling process of preparing described according to claim 1 or 2 or 5, which is characterized in that carry out
Before practical aluminum alloy plate materials " pressure rolling cooling between passage-big " coupling preparation process, it is primarily based on software for calculation, is made
Determine rolling mill practice regulation, carries out " cooling between passage-pressure rolling greatly " simulation, then by cooling time between change passage, obtain
Blank temperature field, stress-strain field and the infiltrative comparing result of deformation under different cooling times, are formulated best according to result
" pressure rolling cooling between passage-big " coupling process of preparing, specifically:
1) in Calculation of Heat Transfer, the temperature of workpiece is only calculated, does not consider the temperature change of roll, rolled with simulation softward simulation steel plate
Process processed, a quarter for establishing model are rolled type and are selected glug as analytical calculation using Shape Rolling module
Bright daily increment rolls type, carries out tetrahedral grid；
2) mold only includes home roll, and regards roll as rigid body, designs roll according to roller diameter and moulded dimension, definition is rolled
The plane of symmetry and the speed of rolls of roller；Blank temperature and blank moulded dimension are set, the plane of symmetry and heat-exchange surface of blank are defined；
3) pushing block is added in simulation process, the speed of pushing block is much smaller than mill speed, after pushing block is separated with blank, pushing block
That is stop motion；Heat exchange does not occur between pushing block and blank；The coefficient of friction and the coefficient of heat conduction of blank and roll are set；If
Setting simulation control includes step number, time step；It checks and generates database file；
4) simulate pre-treatment: setting grid draws criterion and activation target volume again；When cooling between carrying out passage, only retain heat and hand over
Mold changing formula chooses the upper surface of model, and Transfer Boundary Condition will be deleted after the completion of cooling by carrying out the setting of Transfer Boundary Condition,
And the boundary condition of environment heat exchange is made an addition to, deformation pattern is chosen again, carries out analog approach；
5) by cooling time between change passage, blank temperature field, stress-strain field and the deformation under different cooling times are obtained
Infiltrative comparing result formulates optimal " cooling-big pressure rolling between passage " coupling process of preparing according to result.
7. a kind of aluminum alloy plate materials according to claim 3 couple process of preparing, which is characterized in that carry out practical aluminium
Before sheet alloy " pressure rolling cooling between passage-big " coupling preparation process, it is primarily based on software for calculation, formulates rolling
Technological procedure carries out " cooling between passage-pressure rolling greatly " simulation, then by cooling time between change passage, obtains different cold
But the blank temperature field under the time, stress-strain field and the infiltrative comparing result of deformation, formulate optimal " passage according to result
Between cooling-big pressure rolling " coupling process of preparing, specifically:
1) in Calculation of Heat Transfer, the temperature of workpiece is only calculated, does not consider the temperature change of roll, rolled with simulation softward simulation steel plate
Process processed, a quarter for establishing model are rolled type and are selected glug as analytical calculation using Shape Rolling module
Bright daily increment rolls type, carries out tetrahedral grid；
2) mold only includes home roll, and regards roll as rigid body, designs roll according to roller diameter and moulded dimension, definition is rolled
The plane of symmetry and the speed of rolls of roller；Blank temperature and blank moulded dimension are set, the plane of symmetry and heat-exchange surface of blank are defined；
3) pushing block is added in simulation process, the speed of pushing block is much smaller than mill speed, after pushing block is separated with blank, pushing block
That is stop motion；Heat exchange does not occur between pushing block and blank；The coefficient of friction and the coefficient of heat conduction of blank and roll are set；If
Setting simulation control includes step number, time step；It checks and generates database file；
4) simulate pre-treatment: setting grid draws criterion and activation target volume again；When cooling between carrying out passage, only retain heat and hand over
Mold changing formula chooses the upper surface of model, and Transfer Boundary Condition will be deleted after the completion of cooling by carrying out the setting of Transfer Boundary Condition,
And the boundary condition of environment heat exchange is made an addition to, deformation pattern is chosen again, carries out analog approach；
5) by cooling time between change passage, blank temperature field, stress-strain field and the deformation under different cooling times are obtained
Infiltrative comparing result formulates optimal " cooling-big pressure rolling between passage " coupling process of preparing according to result.
8. a kind of aluminum alloy plate materials according to claim 4 couple process of preparing, which is characterized in that carry out practical aluminium
Before sheet alloy " pressure rolling cooling between passage-big " coupling preparation process, it is primarily based on software for calculation, formulates rolling
Technological procedure carries out " cooling between passage-pressure rolling greatly " simulation, then by cooling time between change passage, obtains different cold
But the blank temperature field under the time, stress-strain field and the infiltrative comparing result of deformation, formulate optimal " passage according to result
Between cooling-big pressure rolling " coupling process of preparing, specifically:
1) in Calculation of Heat Transfer, the temperature of workpiece is only calculated, does not consider the temperature change of roll, rolled with simulation softward simulation steel plate
Process processed, a quarter for establishing model are rolled type and are selected glug as analytical calculation using Shape Rolling module
Bright daily increment rolls type, carries out tetrahedral grid；
2) mold only includes home roll, and regards roll as rigid body, designs roll according to roller diameter and moulded dimension, definition is rolled
The plane of symmetry and the speed of rolls of roller；Blank temperature and blank moulded dimension are set, the plane of symmetry and heat-exchange surface of blank are defined；
3) pushing block is added in simulation process, the speed of pushing block is much smaller than mill speed, after pushing block is separated with blank, pushing block
That is stop motion；Heat exchange does not occur between pushing block and blank；The coefficient of friction and the coefficient of heat conduction of blank and roll are set；If
Setting simulation control includes step number, time step；It checks and generates database file；
4) simulate pre-treatment: setting grid draws criterion and activation target volume again；When cooling between carrying out passage, only retain heat and hand over
Mold changing formula chooses the upper surface of model, and Transfer Boundary Condition will be deleted after the completion of cooling by carrying out the setting of Transfer Boundary Condition,
And the boundary condition of environment heat exchange is made an addition to, deformation pattern is chosen again, carries out analog approach；
5) by cooling time between change passage, blank temperature field, stress-strain field and the deformation under different cooling times are obtained
Infiltrative comparing result formulates optimal " cooling-big pressure rolling between passage " coupling process of preparing according to result.
Priority Applications (1)
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| TWI678244B (en) * | 2019-02-23 | 2019-12-01 | 中國鋼鐵股份有限公司 | Temperature control method for hot rolling process of aluminum coil |
| CN110976520A (en) * | 2019-12-20 | 2020-04-10 | 中铝瑞闽股份有限公司 | Production method for aluminum alloy hot-rolled crystal grains with excellent uniformity |
| CN111842489B (en) * | 2020-07-01 | 2022-02-08 | 东北大学 | Method for improving surface quality of hot-rolled pipeline steel |
| CN113695405B (en) * | 2021-09-07 | 2022-07-29 | 燕山大学 | Uniform cooling system and method for differential temperature rolling of large-scale shell ring |
| CN114522989B (en) * | 2022-03-18 | 2023-03-31 | 东北大学 | Metal rolling inter-pass cooling process optimization based on multi-physical-field simulation |
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