CN106825044A - A kind of TiAl alloy plate hot rolling device and hot-rolling method - Google Patents
A kind of TiAl alloy plate hot rolling device and hot-rolling method Download PDFInfo
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- CN106825044A CN106825044A CN201710186975.1A CN201710186975A CN106825044A CN 106825044 A CN106825044 A CN 106825044A CN 201710186975 A CN201710186975 A CN 201710186975A CN 106825044 A CN106825044 A CN 106825044A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 73
- 239000000956 alloy Substances 0.000 title claims abstract description 73
- 238000005098 hot rolling Methods 0.000 title claims abstract description 73
- 229910010038 TiAl Inorganic materials 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims abstract description 124
- 238000005096 rolling process Methods 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 37
- 238000003801 milling Methods 0.000 claims abstract description 28
- 238000011533 pre-incubation Methods 0.000 claims abstract description 14
- 238000009413 insulation Methods 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 description 7
- 238000005272 metallurgy Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910006281 γ-TiAl Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
- B21B1/34—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 by hot-rolling
-
- 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
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
Abstract
The present invention relates to a kind of TiAl alloy plate hot rolling device and hot-rolling method.The device is included with lower component：Roller-way, also includes being arranged at stay-warm case and roller-bottom type tunnel heat-treatment furnace after the second heating furnace by the roller-way, the first heating furnace on the roller-way, milling train preincubation cover, hot-rolling mill, milling train successively；First heating furnace is roller-bottom type tunnel heating furnace；Stay-warm case is respectively positioned at the entrance side and outlet side of the hot-rolling mill after the milling train preincubation cover and the milling train；Roller-bottom type tunnel heat-treatment furnace includes high-temperature region, middle warm area and low-temperature space successively.The problems such as hot-rolling method can effectively solve the problem that the temperature drop and operating difficulties during TiAl alloy plate rolling, especially large scale TiAl alloy sheet material.
Description
Technical field
The present invention relates to a kind of rolling device and hot-rolling method of TiAl alloy sheet material, a kind of rolling large scale is referred in particular to
TiAl alloy sheet material hot-rolling arrangement and its hot-rolling method.
Background technology
TiAl alloy is a kind of novel light heat resistant structure material, and, less than the 50% of nickel-base alloy, temperature in use can for proportion
Up to 700 DEG C -900 DEG C, with the feature performance benefit such as lightweight, high-strength, anti-corrosion, wear-resisting, high temperature resistant, the neck such as Aeronautics and Astronautics is increasingly becoming
The important candidate materials in domain.The sheet material of TiAl alloy in addition to being expected to be directly used as structural material, be also used as superplasticity into
The preforming material of shape, and for make the parts of near-net-shape Aeronautics and Astronautics engine and the wing of super speed vehicle,
Housing etc..
The preparation of TiAl alloy sheet material mainly has ingot metallurgy method and powder metallurgic method.Prepared by ingot metallurgy method is first melting
TiAl alloy ingot casting is prepared, is then processed using high temperature insostatic pressing (HIP) and homogenizing annealing, then forging refinement cast sturcture, most laggard
Row rolling.A kind of advanced TiAl alloy plate rolling has been invented on the basis of ingot metallurgy method by Austrian Plansee AG companies
Technology (ASRP), successfully rolls out the full-size of TiAl alloy sheet material up to 1800mm × 500mm × 1mm.Domestic Beijing section
The units such as skill university, Harbin Institute of Technology have carried out ingot metallurgy method TiAl alloy sheet material preparation research, and chi is rolled out respectively
β-gamma-TiAl alloy the plate of very little high niobium Ti Al alloy sheet material and 700mm × 200mm for 360mm × 100mm × 3.5mm × 2mm
Material.Powder metallurgic method be by Ti and Al elements mixed powder by compacting, extruding, rolling etc. process near-net-shape be mixed powder
Sheet material, the sheet material after shaping generates TiAl alloy in subsequent sintering, hot pressing or hot isostatic pressing by priming reaction, or
Hot rolling is carried out again after person's pre-alloying powder high temperature insostatic pressing (HIP) consolidation.The units such as domestic Central South University have been carried out last metallurgy method TiAl and have been closed
Golden plate material preparation research, its size is relatively small.As described above, the TiAl alloy board dimension that the country is rolled is smaller, with state
Also there is larger gap outward.Therefore, it is highly desirable to carry out the research of large scale TiAl alloy sheet material technology of preparing.
Up to the present, problem present in TiAl alloy technology of preparing is not still well solved, particularly
Cracking is easy to when preparing sheet material using hot rolling technology, so as to get large scale, high-quality sheet material are extremely difficult.Reason is on the one hand main
If TiAl alloy belongs to less-deformable alloy, be not suitable for high temperature rolling shaping.On the other hand it is TiAl alloy deformation temperature window
Very narrow, the control of nearly isothermal pack rolling technique is more difficult.In order to reduce the temperature drop of slab in the operation of rolling, generally using jacket
Mode roll, insulation is melted down between passage.As ingot metallurgy method is (" a kind of high disclosed in Chinese patent CN201410035393.X
" a kind of uniform formation disclosed in the preparation method of Nb TiAl-base alloy sheet material " and Chinese patent application CN201610265054.X
TiAl alloy sheet material preparation method ") and powder metallurgic method (" disclosed in Chinese patent application CN201010144977.2
Plant the preparation method of TiAl-base alloy rolled plate " and " a kind of powder metallurgy disclosed in Chinese patent CN201210131206.9
The preparation method of Ultra-fine Grained TiAl base alloy plate ").But, the above method carries out low speed rolling using jacket mode, it is impossible to
TiAl alloy sheet material is avoided along the thermograde and the temperature drop of sheet edge produced by rolling direction, especially large scale TiAl plates
Material.Meanwhile, sheet material makes plate surface sharp temperature drop with roll contact.Additionally, by large scale TiAl alloy slab between passage
Or sheet material when coming out of the stove in the presence of certain temperature drop, taken out from stove or melt down insulation and also bring difficulty to operation.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide a kind of TiAl alloy plate hot rolling device and hot rolling side
Method, the problems such as can effectively solve the problem that the temperature drop and operating difficulties during TiAl alloy plate rolling, especially large scale TiAl
Sheet alloy.
In order to achieve the above object, the invention provides a kind of TiAl alloy plate hot rolling device, the hot-rolling arrangement includes
With lower component：Roller-way, also includes being arranged at the second heating furnace by roller-way, the first heating furnace, milling train on the roller-way successively
Stay-warm case and roller-bottom type tunnel heat-treatment furnace after preincubation cover, hot-rolling mill, milling train；
First heating furnace is roller-bottom type tunnel heating furnace；
Stay-warm case is respectively positioned at the entrance side and outlet side of hot-rolling mill after milling train preincubation cover and milling train；
Roller-bottom type tunnel heat-treatment furnace includes high-temperature region, middle warm area and low-temperature space successively.
In said apparatus, it is preferable that certain spacing is provided between all parts.
In said apparatus, it is preferable that the spacing of the second heating furnace and the first heating furnace is 1m-10m；First heating furnace with
The spacing of milling train preincubation cover is 0.1m-2m；Milling train preincubation cover is 0.5m-5m with the spacing of hot-rolling mill；Hot-rolling mill and milling train
The spacing of stay-warm case is 0.5m-5m afterwards；Stay-warm case and the spacing of roller-bottom type tunnel heat-treatment furnace are 0.1m-2m after milling train.
In said apparatus, it is preferable that hot-rolling mill includes working roll, secondary heating mechanism and two guide devices；
Working roll is used to carry out the rolling of sheet material, and it at least includes a top working roll and a bottom working roll, upper work
Roller is correspondingly arranged to use cooperatively up and down with bottom working roll, and the upper surface of bottom working roll is located at same water with the upper surface of roller-way
In plane；
Secondary heating mechanism is arranged near the top working roll and bottom working roll, continuous online for being carried out to working roll
Heating；The mode of heating of secondary heating mechanism is continuous online high-frequency induction heating, can be by top working roll and bottom working roll table
Face temperature is heated to 300 DEG C -600 DEG C and is kept；
Two guide devices are located at the porch and exit of hot-rolling mill respectively, so that slab or rolled piece press set direction
With state exactly, stably into and out roll.
In said apparatus, it is preferable that the roll surface length of heated top working roll and bottom working roll is its barrel length
90%-95%.
In said apparatus, it is preferable that the top and both sides of the first heating furnace are provided with some first heaters；Roller bottom
The top and both sides of each warm area of formula tunnel heat-treatment furnace are provided with some first heaters, wherein, first heater is
The device that can be arbitrarily heated, the quantity to first heater is not also restricted；
Hot-rolling mill is four-high reversing mill, and each working roll is provided with positive and negative roller.
In said apparatus, it is preferable that roller-way includes furnace rolls road and the outer roller-way of stove；
Furnace rolls road includes several roller-way groups, wherein, can individually be rotated between each roller-way group or at least two groups linkages, often
Individual roller-way group can forward or reverse, velocity of rotation is 0.2m/min-2m/min；
The outer roller-way of stove includes several roller-way groups, and the outer roller-way of the stove of hot-rolling mill entrance side and outlet side is able to individually just
Turn or invert, velocity of rotation is 2m/min-20m/min；Wherein, roller-way group includes 2-7 root roller-ways.
The present invention also provides a kind of hot-rolling method of TiAl alloy sheet material, and the hot-rolling method comprises the following steps：
(1) raw material is provided：TiAl alloy slab is provided, high temperature coatings are coated in the surface of TiAl alloy slab；
(2) heat：TiAl alloy slab is placed in the second heating furnace and is heated, transporting into first through roller-way after coming out of the stove adds
In hot stove, heat again and be incubated；
(3) warm operation roller：Before TiAl alloy slab goes out the first heating furnace, by secondary heating mechanism to hot-rolling mill
The surface of top working roll and bottom working roll is preheated；
(4) roll：After reaching the temperature of positive rolling through the TiAl alloy slab after step (2), carry it to hot rolling
Positive rolling, subsequently enters the high-temperature region of roller-bottom type tunnel heat-treatment furnace on machine, heats and is incubated, and reaches the temperature of reverse rolling
Afterwards, come out of the stove and inversely rolled in hot-rolling mill, be again introduced into the first heating furnace, heat and be incubated, this process is referred to as one
Individual rolling backhaul, through multiple rolling backhauls by TiAl alloy slab rolling into target thickness sheet material；
(5) cool down：Sheet material is sequentially passed through high-temperature region, middle warm area and the low-temperature space of roller-bottom type tunnel heat-treatment furnace, is carried out
Cooling, completes course of hot rolling.
In the above-mentioned methods, it is preferable that in step (2), heating is heated to 1100 DEG C -1200 in the second heating furnace
DEG C, the time of insulation is 20min-60min.
In the above-mentioned methods, it is preferable that in step (3), preheating is heated to 300 DEG C -600 DEG C.To top working roll with
Working roll carries out slab or rolled piece surface when preheating can avoid rolling and the urgency for causing slab or rolled piece is contacted with the roll surface of low temperature
Acute temperature drop.
In the above-mentioned methods, it is preferable that in step (4), rolling is at least 1 passage, and positive and reverse rolling temperature is
γ+α two-phase sections or γ+alpha+beta threephase region, soaking time is 5min-20min, wherein, the TiAl alloy of heterogeneity system has
Different γ+α two-phase sections or γ+alpha+beta threephase region, the i.e. TiAl alloy of heterogeneity system, the temperature of forward direction rolling and reverse
The temperature of rolling is different.
In the above-mentioned methods, it is preferable that in step (5), the furnace temperature of high-temperature region be higher than 1000 DEG C, preferably 1000 DEG C-
1350℃；The furnace temperature of middle warm area is 650 DEG C -1000 DEG C；The furnace temperature of low-temperature space is less than 650 DEG C.
In the above-mentioned methods, it is preferable that in heating and insulating process, furnace rolls road keeps 0.2m/min-2m/min speed
Degree carries out forward or reverse.Furnace rolls road keeps low speed forward or reverse, can eliminate the black print of slab lower surface, it is ensured that temperature is equal
Even property.
In the above-mentioned methods, it is preferable if slab reaches the temperature of reverse rolling after forward direction rolling, then it is directly reverse
Rolling, and enter heating and insulation in the first heating furnace, heated in roller-bottom type tunnel heat-treatment furnace without entering.
In the above-mentioned methods, it is preferable if slab reaches the temperature of positive rolling after reverse rolling, then it is directly positive
Rolling, and enter heating and insulation in the high-temperature region of roller-bottom type tunnel heat-treatment furnace, heated without entering in the first heating furnace.
In the above-mentioned methods, it is preferable that the time of insulation is 5min-20min.
In the above-mentioned methods, it is preferable that during first block of slab of rolling, next block of slab enter in the first heating furnace heating and
Insulation, when after first piece of slab rolling into roller-bottom type tunnel heat-treatment furnace high-temperature region in heating and be incubated when, next block of plate
Base enters hot mill rolling, you can carry out alternately heating, insulation and rolling with two pieces or polylith slab.
The TiAl alloy plate hot rolling device that the present invention is provided arranges that TiAl alloy plate hot rolling method is adopted using close-coupled
Online heat preserving method is used, is had the advantages that：
1. slab or rolled piece are not only shortened in the stove outer shipping time, and in slab or workpiece front end feed mill, are rolled
In the middle of part with afterbody still in stay-warm case；
2. the working roll with slab or rolled piece directly contact is heated, so invention production TiAl alloy sheet material can significantly drop
The thermograde of low its three-dimensional (rolling to-length direction, transverse direction-width, thickness direction), and eliminate traditional bag
Set step；
3. large scale TiAl sheet materials can be rolled；
4. the surface quality and production efficiency of TiAl sheet materials can be improved.
Brief description of the drawings
Fig. 1 is the structural representation of the TiAl alloy plate hot rolling device of offer in embodiment 1.
Fig. 2 is the flow chart of the TiAl alloy plate hot rolling method of offer in embodiment 2.
Main Reference symbol description：
1 second heating furnace, the outer roller-way of 2 stoves, 3 first heating furnaces, 41 first heaters, 42 secondary heating mechanisms, 51 roll
Machine preincubation cover, stay-warm case after 52 milling trains, 6 hot-rolling mills, 71 top working rolls, 72 bottom working rolls, 8 guide devices, 9 roller-bottom type tunnels
Heat-treatment furnace, 10 furnace rolls roads.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and beneficial effect, now to skill of the invention
Art scheme carry out it is described further below, but it is not intended that to it is of the invention can practical range restriction.
Embodiment 1
A kind of TiAl alloy plate hot rolling device is present embodiments provided, its structure is as shown in Figure 1.The device includes roller
Road, and it is set in turn in the second heating furnace 1, the first heating furnace 3, milling train preincubation cover 51, hot-rolling mill 6, milling train by roller-way
Stay-warm case 52 and roller-bottom type tunnel heat-treatment furnace 9 afterwards；
Roller-way includes furnace rolls road 10 and the outer roller-way 2 of stove, wherein, furnace rolls road 10 includes several roller-way group (each rollers
Road group includes 5 roller-ways), wherein, can individually be rotated between each roller-way group or at least two groups linkages, each roller-way group can be rotated forward
Or reversion, velocity of rotation is 0.6m/min；The outer roller-way 2 of stove before and after hot-rolling mill can be rotated individually respectively, can forward or reverse,
Velocity of rotation is 12m/min；
The spacing of the second heating furnace 1 and the first heating furnace 3 is 2m；
First heating furnace 3 is roller-bottom type tunnel heating furnace, is inside provided with some first heaters 41 and (is installed on first to add
Top and both sides in hot stove 3, in use, the first heater 41 of top and both sides is respectively perpendicular to the upper of slab
Surface and side surface), and be 0.1m with the spacing of milling train preincubation cover 51；
Hot-rolling mill 6 be four-high reversing mill, working roll barrel length be 1450mm, and each working roll be provided with it is positive and negative
Roller, positive and negative bending roller force is -200KN to+200KN, and the hot-rolling mill 6 includes 71, bottom working roll 72 of a top working roll, leads
Position device 8, secondary heating mechanism 42, wherein, top working roll 71 is correspondingly arranged to use cooperatively with bottom working roll about 72, and under
The upper surface of working roll 72 is located in same level with the upper surface of roller-way 2；
Secondary heating mechanism 42 is arranged on the vicinity of top working roll 71 and bottom working roll 72, for being carried out continuously to working roll
On-line heating, heated roll surface length is the 90% of its barrel length；The mode of heating of secondary heating mechanism 42 is continuous existing
Line high-frequency induction heating, is heated using the kelvin effect of high-frequency induction heating to working roll；
Two guide devices 8 are respectively positioned at the porch and exit of hot-rolling mill 6；
After milling train preincubation cover 51 and milling train stay-warm case 52 respectively positioned at hot-rolling mill 6 entrance side and outlet side, and with heat
The spacing of milling train 6 is 0.5m；Stay-warm case is mainly used in the middle afterbody to the slab in slab in transit or the operation of rolling
It is incubated；
After roller-bottom type tunnel heat-treatment furnace 9, with milling train the spacing of stay-warm case 52 be 0.1m, its successively include high-temperature region, in
Warm area and low-temperature space, wherein, some first heating dresses are installed in the position of each warm area of correspondence in roller-bottom type tunnel heat-treatment furnace 9
Put 41 and (be respectively arranged in the top and both sides of each warm area of correspondence in roller-bottom type tunnel heat-treatment furnace 9, in use, top
And the first heater 41 of both sides is respectively perpendicular to upper surface and the side surface of slab).
In said apparatus, the furnace temperature of the high-temperature region of the first heating furnace 3 and roller-bottom type tunnel heat-treatment furnace 9 is controlled
1230℃-1270℃。
Embodiment 2
The present embodiment provides a kind of TiAl alloy plate hot rolling method, and the method is carried out using the device of embodiment 1, specifically
Flow is as shown in Figure 2.The method is comprised the following steps：
(1) raw material is provided：There is provided Ti-43.5Al-4Nb-1Mo-0.1B (at.%) alloy (referred to as：TNM alloys) slab,
High temperature coatings are coated on the surface of the alloy slab；
(2) heat：TNM alloy slabs are placed in the second heating furnace 1,1180 DEG C are heated to, transported through roller-way 2 after coming out of the stove
Send into the first heating furnace 3, be heated to 1255 DEG C (temperature of forward direction rolling), be incubated 30min；
(3) warm operation roller：Before TNM alloy slabs go out the first heating furnace 3, filled by continuous online high-frequency induction heating
Put and the surface temperature of the top working roll 71 of hot-rolling mill 6 and bottom working roll 72 is heated to 500 DEG C -560 DEG C；
(4) roll：Rolled forward direction on hot-rolling mill 6 is transported to through the TNM alloy slabs for being heated to 1255 DEG C after step (2)
1 passage is made, the high-temperature region of roller-bottom type tunnel heat-treatment furnace 9 is subsequently entered, 1255 DEG C (temperature of reverse rolling), insulation are heated to
Come out of the stove after 10min and 1 passage of reverse rolling in hot-rolling mill 6, enter back into heating and thermal insulation in the first heating furnace, rolled back through multiple
TNM alloy slabs are rolled into target thickness sheet material by journey, and sheet metal thickness is 2mm；In heating and insulating process, furnace rolls road 10 is protected
Holding 0.6m/min speed carries out forward or reverse；
(5) cool down：By TNM sheet alloys successively through the high-temperature region of roller-bottom type tunnel heat-treatment furnace 9, middle warm area and low-temperature space
(furnace temperature of high-temperature region is 1000 DEG C -1350 DEG C；The furnace temperature of middle warm area is 650 DEG C -1000 DEG C；The furnace temperature of low-temperature space is less than 650
DEG C), cooled down, complete the operation of rolling of hot rolled plate；
During first block of TNM alloy slab of rolling, second block of TNM alloys slab enters heating and insulation in the first heating furnace 3,
When being heated into the high-temperature region of roller-bottom type tunnel heat-treatment furnace 9 and being incubated after first piece of slab rolling, second piece of TNM alloy sheets
Base is rolled into hot-rolling mill 6, and two blocks of TNM alloys slabs carry out alternately heating, insulation and rolling.
In above-mentioned hot-rolling method, if TNM alloys slab reaches the temperature of reverse rolling after forward direction rolling, directly
Reverse rolling, and enter heating and insulation 10min-20min in the first heating furnace 3, without entering roller-bottom type tunnel heat-treatment furnace 9
Middle heating.
In above-mentioned hot-rolling method, if TNM alloys slab is by reaching the positive temperature for rolling after reverse rolling, directly
Connect positive rolling, and enter high-temperature region heating and the insulation 10min-20min of roller-bottom type tunnel heat-treatment furnace 9, without entering the
Heated in two heating furnaces 1.
By above-mentioned hot-rolling method, can prepare that surface quality is good, the large scale TNM sheet alloys of excellent performance.
Claims (10)
1. a kind of TiAl alloy plate hot rolling device, it is characterised in that：The device is included with lower component：Roller-way, also includes successively
It is arranged at the second heating furnace by the roller-way, the first heating furnace on the roller-way, milling train preincubation cover, hot-rolling mill, milling train
Stay-warm case and roller-bottom type tunnel heat-treatment furnace afterwards；
First heating furnace is roller-bottom type tunnel heating furnace；
Stay-warm case is respectively positioned at the entrance side and outlet side of the hot-rolling mill after the milling train preincubation cover and the milling train；
Roller-bottom type tunnel heat-treatment furnace includes high-temperature region, middle warm area and low-temperature space successively.
2. device according to claim 1, it is characterised in that：Spacing is provided between each part；
Preferably, second heating furnace and the spacing of first heating furnace are 1m-10m；
First heating furnace is 0.1m-2m with the spacing of the milling train preincubation cover；
The milling train preincubation cover is 0.5m-5m with the spacing of hot-rolling mill；
The spacing of stay-warm case is 0.5m-5m after the hot-rolling mill and the milling train；
Stay-warm case and the spacing of roller-bottom type tunnel heat-treatment furnace are 0.1m-2m after the milling train.
3. device according to claim 1 and 2, it is characterised in that：The hot-rolling mill includes working roll, secondary heating mechanism
With two guide devices；
The working roll at least includes on a top working roll and a bottom working roll, the top working roll and the bottom working roll
Under be correspondingly arranged to use cooperatively, and the upper surface of the upper surface of the bottom working roll and the roller-way is located at same level
On；
The secondary heating mechanism is arranged near the top working roll and bottom working roll, for being carried out continuously to the working roll
On-line heating；Preferably, the roll surface length of the heated top working roll and the bottom working roll is its barrel length
90%-95%；
Two guide devices are respectively positioned at the porch and exit of the hot-rolling mill.
4. the device according to any one of claim 1-3, it is characterised in that：The top and both sides of first heating furnace
Some first heaters are installed；
The top and both sides of each warm area of roller-bottom type tunnel heat-treatment furnace are provided with some first heaters；
The hot-rolling mill is four-high reversing mill, and each working roll is provided with positive and negative roller.
5. the device according to any one of claim 1-4, it is characterised in that：The roller-way is included outside furnace rolls road and stove
Roller-way；
The furnace rolls road includes several roller-way groups, wherein, can individually be rotated between each roller-way group or at least two groups connection
It is dynamic, each described roller-way group can forward or reverse, velocity of rotation is 0.2m/min-2m/min；
The outer roller-way of the stove includes several roller-way groups, the outer roller-way of the stove of hot-rolling mill entrance side and outlet side individually rotate forward or
Reversion, velocity of rotation is 2m/min-20m/min；
Each described roller-way group includes 2-7 root roller-ways.
6. a kind of hot-rolling method of TiAl alloy sheet material, it is using the TiAl alloy plate any one of claim 1-5
What material hot-rolling arrangement was carried out, it is characterised in that：The hot-rolling method comprises the following steps：
(1) TiAl alloy slab is provided, high temperature coatings is coated in the surface of TiAl alloy slab；
(2) TiAl alloy slab is placed in the second heating furnace and is heated, in transporting into the first heating furnace through roller-way after coming out of the stove, then
Secondary heating is simultaneously incubated；
(3) before TiAl alloy slab goes out the first heating furnace, by secondary heating mechanism to the top working roll of hot-rolling mill and lower work
The surface for making roller is preheated；
(4) after the temperature that TiAl alloy slab reaches positive rolling, carrying it to hot-rolling mill carries out positive rolling, then
Into the high-temperature region of roller-bottom type tunnel heat-treatment furnace, heat and be incubated, after reaching the temperature of reverse rolling, come out of the stove and send into hot rolling
Inversely rolled in machine, be then again introduced into the first heating furnace, heated and be incubated, this process is referred to as into one is rolled back
Journey, through multiple rolling backhauls by TiAl alloy slab rolling into target thickness sheet material；
(5) sheet material is sequentially passed through high-temperature region, middle warm area and the low-temperature space of roller-bottom type tunnel heat-treatment furnace, is cooled down,
Complete course of hot rolling.
7. hot-rolling method according to claim 6, it is characterised in that：In step (2), heating is to add in the second heating furnace
To 1100 DEG C -1200 DEG C, the time of insulation is 20min-60min to heat；
Preferably, in step (3), the preheating is heated to 300 DEG C -600 DEG C；
Preferably, in step (4), the rolling is at least 1 passage, and described positive and reverse rolling temperature is γ+α two-phase sections
Or γ+alpha+beta threephase region, the time of the insulation is 5min-20min；
Preferably, in step (5), the furnace temperature of the high-temperature region is higher than 1000 DEG C, preferably 1000 DEG C -1350 DEG C；The middle temperature
The furnace temperature in area is 650 DEG C -1000 DEG C；The furnace temperature of the low-temperature space is less than 650 DEG C.
8. the hot-rolling method according to claim 6 or 7, it is characterised in that：In heating and insulating process, furnace rolls road is protected
The speed for holding 0.2m/min-2m/min carries out forward or reverse.
9. the hot-rolling method according to any one of claim 6-8, it is characterised in that：After if slab is through forward direction rolling,
Its temperature reaches the temperature of reverse rolling, then direct reverse rolling, and enters heating and insulation in first heating furnace, without
Heated into roller-bottom type tunnel heat-treatment furnace；
Preferably, if slab is after reverse rolling, its temperature reaches the temperature of positive rolling, then directly positive rolling, goes forward side by side
Enter heating and insulation in the high-temperature region of roller-bottom type tunnel heat-treatment furnace, heated without entering in first heating furnace；
Preferably, the time of the insulation is 5min-20min.
10. the hot-rolling method according to any one of claim 6-9, it is characterised in that：It is next during first block of slab of rolling
Block slab enters the roller-bottom type into being heated in first heating furnace and being incubated after first piece of slab rolling
When heating and be incubated in the high-temperature region of tunnel heat-treatment furnace, the next block of slab is rolled into the hot-rolling mill, i.e., and two
Block or polylith slab carry out alternately heating, insulation and rolling.
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| CN115625207B (en) * | 2022-10-31 | 2024-03-19 | 华中科技大学 | Isothermal vibration auxiliary rolling device for preparing TiAl alloy plate and rolling method thereof |
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