CN106077088B - The method rolled using TiAl-base alloy wrapping structure - Google Patents
The method rolled using TiAl-base alloy wrapping structure Download PDFInfo
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- CN106077088B CN106077088B CN201610423585.7A CN201610423585A CN106077088B CN 106077088 B CN106077088 B CN 106077088B CN 201610423585 A CN201610423585 A CN 201610423585A CN 106077088 B CN106077088 B CN 106077088B
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- jacket
- tial
- base alloy
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- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
- B21B2203/12—Covers or shieldings
Abstract
The method rolled using TiAl-base alloy wrapping structure, a kind of method rolled the present invention relates to TiAl-base alloy wrapping structure and using it.Temperature and deformation uniformity of the blank in the operation of rolling are difficult to ensure that the present invention is to solve existing TiAl-base alloy hot rolling technique, easily occurs cracking phenomena, the problem of rolling success rate is relatively low.A kind of TiAl-base alloy wrapping structure is made up of upper jacket and lower jacket；The upper jacket is made up of cover plate, powdered polycrystalline mullite cotton, jacket interlayer and molybdenum plate；The upper jacket is identical with lower wrapping structure, and the upper jacket and lower jacket are symmetrical arranged.Method：First, TiAl-base alloy slab is put into jacket, high temp glass antioxidant is applied in outer surface；Put the workpiece in heating furnace；2nd, workpiece is sent into milling train, surface parcel polycrystalline asbestos after the completion of rolling, make annealing treatment；It is repeated once rolling, furnace cooling.The present invention is used to roll TiAl-base alloy.
Description
Technical field
A kind of method rolled the present invention relates to TiAl-base alloy wrapping structure and using it.
Background technology
The preparation of TiAl base alloy plate is one of mostly important problem in its practical research.Its sheet material both can be straight
Connect as structural material, it can also be used to the preforming material of superplastic forming part.One of TiAl base alloy plate application dives
It is the thin plate or lattice structure on High Speed Civil transporter in field；Another is the carrier vehicle of following repeatable transmitting
(RLV) stressed-skin construction.RLV is when the earth is returned, and its surface temperature is up to 850 DEG C, and the load that withstands shocks.TiAl
The application of based alloy thin plate can make RLV containment weight lighter, more rigid, more durable, and TiAl base alloy plate is in aviation
The fields such as space flight have broad application prospects.Due to the essential fragility of TiAl-base alloy, it is desirable in hot procedure temperature and
Deformation must all reach higher uniformity, otherwise easily ftracture.In order to improve the temperature in the TiAl-base alloy operation of rolling and
Deformation uniformity, the present invention devises a kind of new wrapping structure and improves TiAl base pack rolling techniques, to obtain table
Face quality is good, the TiAl base alloy plate of even tissue.
The content of the invention
The present invention is to solve existing TiAl-base alloy hot rolling technique be difficult to ensure that temperature of the blank in the operation of rolling and
Deformation uniformity, easily occurs cracking phenomena, the problem of rolling success rate is relatively low, and provides a kind of TiAl-base alloy wrapping structure
And the method rolled using it.
A kind of TiAl-base alloy wrapping structure of the present invention is made up of upper jacket and lower jacket；The upper jacket is by cover plate, powder
Last shape polycrystalline mullite cotton, jacket interlayer and molybdenum plate composition；The top of the jacket interlayer is provided with slope groove, the jacket
The bottom of interlayer is provided with right angle groove, and the cover plate is connected in slope groove by argon arc welding, and the thickness of the cover plate is small
Powdered polycrystalline mullite cotton is filled between the height of slope groove, the bottom of the cover plate and slope groove；It is described straight
The bottom of angle groove is provided with molybdenum plate；The upper jacket is identical with lower wrapping structure, and the upper jacket and lower jacket are symmetrical arranged,
The side that the upper jacket is provided with right angle groove is connected with the side that the lower jacket is provided with right angle groove by argon arc welding.
The method rolled using TiAl-base alloy wrapping structure is specifically carried out according to the following steps：
First, TiAl-base alloy slab is put into the right angle groove between upper jacket and lower jacket, then using argon arc welding
By upper jacket and lower jacket soldering, then one layer of high temp glass is coated in the outer surface of TiAl-base alloy wrapping structure anti-oxidant
Agent, obtains workpiece to be rolled；After the temperature of high-temperature heater is from room temperature to initial temperature of rolling, workpiece to be rolled is put
Enter and 2h is incubated in high-temperature heater, the workpiece after being incubated；
2nd, the workpiece after insulation is taken out from high-temperature heater and milling train is transferred in 10s, then after insulation
Workpiece surface wraps up the thick polycrystalline asbestos of one layer of 5~10mm, then carries out the first passes, and pass deformation is 10%~
15%；After the completion of first passes, transfer in heating furnace and made annealing treatment, annealing time is 10min~15min；
The thick polycrystalline asbestos of one layer of 5~10mm are wrapped up after annealing again, the second passes are then carried out, pass deformation is
10%~15%；After the completion of second passes, transfer in heating furnace and made annealing treatment, annealing time be 10min~
15min；Furnace cooling, workpiece after being rolled；Thickness of workpiece direction total deformation is 60~70% after the rolling.
The beneficial effects of the invention are as follows：
The TiAl-base alloy wrapping structure of the present invention serves two effects simultaneously, ensures TiAl-base alloy blank temperature first
Uniformity and deformation uniformity are spent, powdered polycrystalline mullite cotton effectively reduces TiAl-base alloy blank in the operation of rolling
Temperature is scattered and disappeared, and makes blank temperature in deformation process more uniform.The plastic deformation ability and intensity of pure molybdenum plate are all higher than TiAl
Based alloy, and the intensity of 321 stainless steels of high-ductility is less than TiAl-base alloy.If stainless steel is directly contacted with alloy, then
Once crackle occurs in alloy surface, stainless steel can be embedded into alloy, so that accelerate the extension of alloy crack, and pure molybdenum plate is then
It is not in such case.Therefore, pure molybdenum plate can improve deformation uniformity of the TiAl-base alloy in the operation of rolling.Rolled
The strain rate of journey is 0.04~0.05s-1, can also improve the deformation uniformity of alloy.Because mill speed is slower, if workpiece
Directly contacted with roll, then the heat of workpiece can scatter and disappear rapidly.Therefore, before every time rolling deformation, workpiece surface will be wrapped up
Polycrystalline asbestos thick one layer of 5~10mm, the heat for being effectively reduced workpiece scatters and disappears.By the present invention, surface quality can be obtained good
It is good, flawless, the TiAl base alloy plate of even tissue, 14 μm or so of its average grain size.
Brief description of the drawings
Fig. 1 is the structural representation of TiAl-base alloy wrapping structure.
Embodiment
Technical solution of the present invention is not limited to act embodiment set forth below, in addition between each embodiment
Any combination.
Embodiment one：Illustrate present embodiment, a kind of TiAl-base alloy wrapping structure of present embodiment with reference to Fig. 1
It is made up of upper jacket and lower jacket；The upper jacket is by 4 groups of cover plate 1, powdered polycrystalline mullite cotton 2, jacket interlayer 3 and molybdenum plate
Into；The top of the jacket interlayer 3 is provided with slope groove, and the bottom of the jacket interlayer 3 is provided with right angle groove, the lid
Plate 1 is connected in slope groove by argon arc welding, and the thickness of the cover plate 1 is less than the height of slope groove, the cover plate 1 and tiltedly
Spend between the bottom of groove filled with powdered polycrystalline mullite cotton 2；The bottom of the right angle groove is provided with molybdenum plate 4；It is described
Upper jacket is identical with lower wrapping structure, and the upper jacket and lower jacket are symmetrical arranged, and the upper jacket is provided with right angle groove
The side that side is provided with right angle groove with the lower jacket is connected by argon arc welding.
The material of the welding wire of argon arc welding described in present embodiment is 321 stainless steels.
Embodiment two：Present embodiment from unlike embodiment one：The cover plate 1 and jacket interlayer
3 material is 321 stainless steels.Other are identical with embodiment one.
Embodiment three：Present embodiment from unlike embodiment one or two：The thickness of the cover plate 1
For 3.8mm；The thickness of the jacket interlayer 3 is 4.7mm；The gradient of the slope groove is 45 °.Other and embodiment
One or two is identical.
The upper and lower surface of cover plate 1 described in present embodiment is polished and uses alcohol washes.
Embodiment four：Unlike one of present embodiment and embodiment one to three：The jacket folder
The outer edge of layer 3 is provided with chamfering, and the size of the chamfering is 4 × arctan (1.75).Other with embodiment one to
One of three is identical.
Embodiment five：Unlike one of present embodiment and embodiment one to four：It is described powdered
The thickness of polycrystalline mullite cotton 2 is 2mm；The thickness of the molybdenum plate 4 is 1.5mm.Other are one of with embodiment one to four
It is identical.
The upper and lower surface of molybdenum plate 4 described in present embodiment is polished and uses alcohol washes；The purity of the molybdenum plate 4 is more than
99.6%.
Embodiment six：The method rolled using TiAl-base alloy wrapping structure described in embodiment one
Specifically carry out according to the following steps：
First, TiAl-base alloy slab is put into the right angle groove between upper jacket and lower jacket, then using argon arc welding
By upper jacket and lower jacket soldering, then one layer of high temp glass is coated in the outer surface of TiAl-base alloy wrapping structure anti-oxidant
Agent, obtains workpiece to be rolled；After the temperature of high-temperature heater is from room temperature to initial temperature of rolling, workpiece to be rolled is put
Enter and 2h is incubated in high-temperature heater, the workpiece after being incubated；
2nd, the workpiece after insulation is taken out from high-temperature heater and milling train is transferred in 10s, then after insulation
Workpiece surface wraps up the thick polycrystalline asbestos of one layer of 5~10mm, then carries out the first passes, and pass deformation is 10%~
15%；After the completion of first passes, transfer in heating furnace and made annealing treatment, annealing time is 10min~15min；
The thick polycrystalline asbestos of one layer of 5~10mm are wrapped up after annealing again, the second passes are then carried out, pass deformation is
10%~15%；After the completion of second passes, transfer in heating furnace and made annealing treatment, annealing time be 10min~
15min；Furnace cooling, workpiece after being rolled；Thickness of workpiece direction total deformation is 60~70% after the rolling.
Embodiment seven：Present embodiment from unlike embodiment six：It is initial described in step one
Rolling temperature is 1220 DEG C~1250 DEG C.Other are identical with embodiment six.
Embodiment eight：Present embodiment from unlike embodiment six or seven：Described in step one
Initial temperature of rolling is 1230 DEG C.Other are identical with embodiment six or seven.
Embodiment nine：Unlike one of present embodiment and embodiment six to eight：Institute in step 2
The strain rate for the first passes stated is 0.04s-1~0.05s-1.Other are identical with one of embodiment six to eight.
Embodiment ten：Unlike one of present embodiment and embodiment six to nine：Institute in step 2
The strain rate for the second passes stated is 0.04s-1~0.05s-1.Other are identical with one of embodiment six to nine.
Beneficial effect of the present invention is verified using following examples：
Embodiment one：Illustrate the present embodiment with reference to Fig. 1, the present embodiment utilizes TiAl-base alloy described in embodiment one
The method that wrapping structure is rolled specifically is carried out according to the following steps：
First, TiAl-base alloy slab is put into the right angle groove between upper jacket and lower jacket, then using argon arc welding
By upper jacket and lower jacket soldering, then one layer of high temp glass is coated in the outer surface of TiAl-base alloy wrapping structure anti-oxidant
Agent, obtains workpiece to be rolled；After the temperature of high-temperature heater is from room temperature to initial temperature of rolling, workpiece to be rolled is put
Enter and 2h is incubated in high-temperature heater, the workpiece after being incubated；
2nd, the workpiece after insulation is taken out from high-temperature heater and milling train is transferred in 10s, then after insulation
Workpiece surface wraps up the thick polycrystalline asbestos of one layer of 5~10mm, then carries out the first passes, and pass deformation is 10%~
15%；After the completion of first passes, transfer in heating furnace and made annealing treatment, annealing time is 10min~15min；
The thick polycrystalline asbestos of one layer of 5~10mm are wrapped up after annealing again, the second passes are then carried out, pass deformation is
10%~15%；After the completion of second passes, transfer in heating furnace and made annealing treatment, annealing time be 10min~
15min；Furnace cooling, workpiece after being rolled；Thickness of workpiece direction total deformation is 60~70% after the rolling.
By the present embodiment, surface quality can be obtained well, flawless, the TiAl base alloy plate of even tissue, it is put down
Equal 14 μm or so of crystallite dimension.
Claims (5)
1. the method rolled using TiAl-base alloy wrapping structure, it is characterised in that entered using TiAl-base alloy wrapping structure
The method of row rolling is specifically carried out according to the following steps：
First, TiAl-base alloy slab is put into the right angle groove between upper jacket and lower jacket, then will be upper using argon arc welding
Jacket and lower jacket soldering, then coat one layer of high temp glass antioxidant in the outer surface of TiAl-base alloy wrapping structure, obtain
To workpiece to be rolled；After the temperature of high-temperature heater is from room temperature to initial temperature of rolling, workpiece to be rolled is put into height
2h is incubated in warm heating furnace, the workpiece after being incubated；
2nd, the workpiece after insulation is taken out from high-temperature heater and milling train is transferred in 10s, then the workpiece after insulation
The thick polycrystalline asbestos of one layer of 5~10mm are wrapped up on surface, then carry out the first passes, and pass deformation is 10%~15%；
After the completion of first passes, transfer in heating furnace and made annealing treatment, annealing time is 10min~15min；At annealing
The thick polycrystalline asbestos of one layer of 5~10mm are wrapped up after reason again, the second passes are then carried out, pass deformation is 10%~
15%；After the completion of second passes, transfer in heating furnace and made annealing treatment, annealing time is 10min~15min；
Furnace cooling, workpiece after being rolled；Thickness of workpiece direction total deformation is 60~70% after the rolling；The TiAl bases are closed
Golden wrapping structure is made up of upper jacket and lower jacket；The upper jacket is by cover plate (1), powdered polycrystalline mullite cotton (2), jacket
Interlayer (3) and molybdenum plate (4) composition；The top of the jacket interlayer (3) is provided with slope groove, the jacket interlayer (3)
Portion is provided with right angle groove, and the cover plate (1) is connected in slope groove by argon arc welding, and the thickness of the cover plate (1) is less than
The height of slope groove, the cover plate (1) is filled with powdered polycrystalline mullite cotton (2) between the bottom of slope groove；Institute
The bottom for stating right angle groove is provided with molybdenum plate (4)；The upper jacket is identical with lower wrapping structure, the upper jacket and lower jacket pair
Claim to set, the upper jacket is provided with the side that the side of right angle groove and the lower jacket be provided with right angle groove and passes through argon arc
Weldering connection.
2. according to the method described in claim 1, it is characterised in that initial temperature of rolling described in step one for 1220 DEG C~
1250℃。
3. according to the method described in claim 1, it is characterised in that the initial temperature of rolling described in step one is 1230 DEG C.
4. according to the method described in claim 1, it is characterised in that the strain rate of the first passes described in step 2
For 0.04s-1~0.05s-1。
5. according to the method described in claim 1, it is characterised in that the strain rate of the second passes described in step 2
For 0.04s-1~0.05s-1。
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| CN201610423585.7A CN106077088B (en) | 2016-06-15 | 2016-06-15 | The method rolled using TiAl-base alloy wrapping structure |
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| CN106077088B true CN106077088B (en) | 2017-11-03 |
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| CN113231469B (en) * | 2021-05-10 | 2023-04-18 | 贵州大学 | Method for hot rolling of aluminum alloy material sheath for zinc-based composite material |
| CN114247751B (en) * | 2021-12-22 | 2023-11-03 | 西北工业大学重庆科创中心 | Method suitable for preparing TNM alloy plate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4966816A (en) * | 1989-06-07 | 1990-10-30 | Titanium Metals Corporation Of America (Timet) | Pack assembly for hot rolling |
| US5301403A (en) * | 1992-05-08 | 1994-04-12 | Gebrueder Sulzer Aktiengesellschaft | Method of producing metal foil from a reactive metal sheet utilizing a hot rolling thermal pack assembly |
| CN101011705A (en) * | 2007-01-31 | 2007-08-08 | 哈尔滨工业大学 | Method for preparation of Yt-containing TiAl intermetallic compound plate material |
| CN102205486A (en) * | 2011-03-31 | 2011-10-05 | 西北有色金属研究院 | Method for processing iridium alloy bar or plate |
| CN102632075A (en) * | 2012-04-28 | 2012-08-15 | 中南大学 | Preparation method of large-size thin plate of niobium-containing titanium-aluminum based alloy by powder metallurgy |
| CN102641890A (en) * | 2012-04-28 | 2012-08-22 | 中南大学 | Preparation method of powder metallurgy superfine crystal titanium aluminum base alloy panel |
| CN104646419A (en) * | 2015-02-05 | 2015-05-27 | 哈尔滨工业大学 | TiAl alloy-improved sheath and method for performing large-deformation-amount plate rolling by applying TiAl alloy-improved sheath |
-
2016
- 2016-06-15 CN CN201610423585.7A patent/CN106077088B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4966816A (en) * | 1989-06-07 | 1990-10-30 | Titanium Metals Corporation Of America (Timet) | Pack assembly for hot rolling |
| US5301403A (en) * | 1992-05-08 | 1994-04-12 | Gebrueder Sulzer Aktiengesellschaft | Method of producing metal foil from a reactive metal sheet utilizing a hot rolling thermal pack assembly |
| CN101011705A (en) * | 2007-01-31 | 2007-08-08 | 哈尔滨工业大学 | Method for preparation of Yt-containing TiAl intermetallic compound plate material |
| CN102205486A (en) * | 2011-03-31 | 2011-10-05 | 西北有色金属研究院 | Method for processing iridium alloy bar or plate |
| CN102632075A (en) * | 2012-04-28 | 2012-08-15 | 中南大学 | Preparation method of large-size thin plate of niobium-containing titanium-aluminum based alloy by powder metallurgy |
| CN102641890A (en) * | 2012-04-28 | 2012-08-22 | 中南大学 | Preparation method of powder metallurgy superfine crystal titanium aluminum base alloy panel |
| CN104646419A (en) * | 2015-02-05 | 2015-05-27 | 哈尔滨工业大学 | TiAl alloy-improved sheath and method for performing large-deformation-amount plate rolling by applying TiAl alloy-improved sheath |
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