CN107267902B - A kind of preparation method of large scale beta-gamma TiAl alloy planks - Google Patents
A kind of preparation method of large scale beta-gamma TiAl alloy planks Download PDFInfo
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- CN107267902B CN107267902B CN201710502760.6A CN201710502760A CN107267902B CN 107267902 B CN107267902 B CN 107267902B CN 201710502760 A CN201710502760 A CN 201710502760A CN 107267902 B CN107267902 B CN 107267902B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0242—Lubricants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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Abstract
A kind of preparation method of large scale beta gamma TiAl alloy planks, is related to a kind of preparation method of TiAl alloy plank.The invention aims to solve since TiAl alloy hot processing window is narrow, temperature drop in the non-isothermal operation of rolling causes plank during preparing large scale TiAl alloy plank to be easy cracking, shape difficult problem, and during mechanical processing removal jacket the problem of plank secondary breakdown.Method：One, the preparation of TiAl alloy blank；Two, jacket is processed；Three, sprayed glass lubricant；Four, soldering and sealing TiAl alloy blank；Five, the high temperature rolling stage；Six, homogenization heat treatment removal residual stress；Seven, mechanical processing removal jacket is to get to large scale beta gamma TiAl alloy planks.The present invention is suitable for the preparation of large scale beta gamma TiAl alloy planks.
Description
Technical field
The present invention relates to a kind of preparation methods of TiAl alloy plank.
Background technology
TiAl alloy have good physical property and mechanical performance, density less than Ni based alloys half (3.9~
4.2g/cm3), it is considered to be a kind of huge high-temperature structural material of development potentiality.By years of researches, the hair of TiAl alloy
Exhibition have been enter into practical stage, at present by casting, forging and super plastic forming method prepare TiAl alloy missile tail,
Car exhaust valve and engine turbine blade have been widely used the fields such as aerospace flight vehicle and automobile engine.But
As Aeronautics and Astronautics technology quickly develops, to further increase the comprehensive performance of aircraft, to the loss of weight of aircraft entirety and
More stringent requirements are proposed for cruising ability, and the development of traditional high temperature Ti alloys has had reached the limit, and Ni based alloys due to
The big problem of density limits its popularization and application, therefore proposes new challenge to the preparation of TiAl alloy.
TiAl alloy plank can be used for preparing the nozzle etc. of the covering of aircraft, the shell of jet engine, helicopter,
The weight of aircraft can be greatly reduced, have a extensive future.But the hot processing window of TiAl alloy is narrow, high temperature deformation
Difficulty, the defects of being easy to crack in the hot-working operation of rolling, particularly with traditional non-isothermal rolling large scale TiAl
Sheet alloy, temperature drop is too fast in the operation of rolling, and TiAl alloy plank tail end is caused to be easy to crack, and crackle exists once generating
It can be further expanded in the subsequent operation of rolling, lead to the fracture of plank entirety.In addition, due to residual stress in the operation of rolling
In the presence of and tissue inhomogeneities, cause subsequent mechanical processing remove jacket easy to produce fracture, constrain large scale
The production and Practical Project application of TiAl alloy.Existing TiAl alloy plank technology of preparing (i.e. non-isothermal rolling technique) is very
Hardly possible obtains the sheet alloy of large scale, high quality, currently, being only using TiAl alloy plank full-size prepared by this technology
800mm × 400mm × 1mm, temperature-room type plasticity are less than 2%.
Invention content
The invention aims to solve since TiAl alloy hot processing window is narrow, the temperature drop in the non-isothermal operation of rolling is led
Plank during preparing large scale TiAl alloy plank is caused to be easy cracking, shape difficult problem, and mechanical processing removal jacket
In the process the problem of plank secondary breakdown, and provide a kind of preparation method of large scale beta-gamma TiAl alloy planks.
What a kind of preparation method of large scale beta-gamma TiAl alloy planks was specifically realized by the following steps：
One, the preparation of TiAl alloy blank：
TiAl alloy preform is made using the method for No. bis- hammer coggings of TiAl, then by TiAl alloy preform
Hip treatment is carried out, hip temperature is 1000 DEG C~1250 DEG C, and hot isostatic pressing pressure is 140MPa~200MPa, heat
The isostatic pressed time is 1h~5h, then is processed the TiAl alloy preform after hip treatment using the method for mechanical processing
At block blank, TiAl alloy blank is obtained；
The nominal chemical composition of TiAl alloy described in step 1 be Ti- (40~45) Al- (7~9) X- (0.1~
0.5) Z (at%), wherein X are beta stable elements, and Z is micro-alloying elements；
The thickness of TiAl alloy blank described in step 1 is 10mm~30mm, and width is 100mm~500mm, length
For 300mm~500mm；
Two, jacket is processed：
Sheath material is processed by groove jacket corresponding with TiAl alloy billet size using the method for mechanical processing；
Sheath material described in step 2 is stainless steel, pure titanium or titanium alloy；
The thickness ratio of groove jacket and TiAl alloy blank described in step 2 is (1~3):1；
Three, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for mechanical processing, obtains the TiAl alloy base of any surface finish
Material is applied the glass lubricant of spraying 1mm~5mm thickness on the inside of the TiAl alloy blank of any surface finish and groove jacket
There is the TiAl alloy blank of lubricant and is coated with the groove jacket of lubricant；
Four, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for being coated with lubricant is put into the groove jacket for being coated with lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
Five, the high temperature rolling stage：
The TiAl alloy blank of jacket is kept the temperature into 1h~5h in the heat-treatment furnace that temperature is 1240 DEG C~1300 DEG C, is obtained
The roll of milling train is carried out pre-add heat treatment, pretreated jacket TiAl is closed by pretreated jacket TiAl alloy blank
Golden blank is put on milling train progress non-isothermal rolling, and mill speed is 10mm/s~150mm/s, and pass deformation is 5%~
30%, rolling total deformation is 50%~95%, and it is 1240 DEG C~1300 DEG C that holding temperature is melted down between passage, and soaking time is
15min~60min obtains rolled piece；
Six, homogenization heat treatment removal residual stress：
By rolled piece be placed in temperature be 850 DEG C~1100 DEG C under conditions of keep the temperature, soaking time be 4h~8h, then with
Stove is cooled to room temperature, obtains the TiAl alloy plank with jacket；
Seven, mechanical processing removal jacket：
Using the jacket on TiAl alloy plank of the method removal with jacket of mechanical processing, large scale beta- is obtained
Gamma TiAl alloy planks.
Advantages of the present invention：
1, the present invention is coated with certain thickness glass lubricant before TiAl alloy rolling inside jacket, on the one hand can be with
Lubricating action opposite between operation of rolling plank and jacket is improved, TiAl alloy on the other hand can be effectively prevent to become in high temperature
Oxidation behavior in shape, while lubricant coating is relatively thicker, is more conducive to the mechanical processing removal jacket in later stage.
2, the roll of milling train is preheated before present invention rolling, the temperature drop that can reduce in the operation of rolling is poor, in addition
Higher initial temperature of rolling is selected, the finishing temperature of TiAl alloy plank tail end can be improved, effectively prevent the operation of rolling
The problem of middle plank cracking.
3, heat treatment removal residual stress is carried out to the TiAl alloy plank of jacket after present invention rolling, can homogenized
The tissue of TiAl alloy plank, improves the comprehensive mechanical property of TiAl alloy plank, and the in addition elimination of residual stress can prevent
Mechanical processing removes the fracture of plank during jacket.
The present invention obtains the large scale beta- that size is (1000~1500mm) × (300~500mm) × (1~3mm)
Gamma TiAl alloy planks, room temperature tensile intensity can reach 900MPa or more, and temperature-room type plasticity can reach 2% or more.
The present invention is used for a kind of preparation method of large scale beta-gamma TiAl alloy planks.
Specific implementation mode
Specific implementation mode one：Present embodiment is a kind of preparation side of large scale beta-gamma TiAl alloy planks
What method was specifically realized by the following steps：
One, the preparation of TiAl alloy blank：
TiAl alloy preform is made using the method for No. bis- hammer coggings of TiAl, then by TiAl alloy preform
Hip treatment is carried out, hip temperature is 1000 DEG C~1250 DEG C, and hot isostatic pressing pressure is 140MPa~200MPa, heat
The isostatic pressed time is 1h~5h, then is processed the TiAl alloy preform after hip treatment using the method for mechanical processing
At block blank, TiAl alloy blank is obtained；
The nominal chemical composition of TiAl alloy described in step 1 be Ti- (40~45) Al- (7~9) X- (0.1~
0.5) Z (at%), wherein X are beta stable elements, and Z is micro-alloying elements；
The thickness of TiAl alloy blank described in step 1 is 10mm~30mm, and width is 100mm~500mm, length
For 300mm~500mm；
Two, jacket is processed：
Sheath material is processed by groove jacket corresponding with TiAl alloy billet size using the method for mechanical processing；
Sheath material described in step 2 is stainless steel, pure titanium or titanium alloy；
The thickness ratio of groove jacket and TiAl alloy blank described in step 2 is (1~3):1；
Three, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for mechanical processing, obtains the TiAl alloy base of any surface finish
Material is applied the glass lubricant of spraying 1mm~5mm thickness on the inside of the TiAl alloy blank of any surface finish and groove jacket
There is the TiAl alloy blank of lubricant and is coated with the groove jacket of lubricant；
Four, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for being coated with lubricant is put into the groove jacket for being coated with lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
Five, the high temperature rolling stage：
The TiAl alloy blank of jacket is kept the temperature into 1h~5h in the heat-treatment furnace that temperature is 1240 DEG C~1300 DEG C, is obtained
The roll of milling train is carried out pre-add heat treatment, pretreated jacket TiAl is closed by pretreated jacket TiAl alloy blank
Golden blank is put on milling train progress non-isothermal rolling, and mill speed is 10mm/s~150mm/s, and pass deformation is 5%~
30%, rolling total deformation is 50%~95%, and it is 1240 DEG C~1300 DEG C that holding temperature is melted down between passage, and soaking time is
15min~60min obtains rolled piece；
Six, homogenization heat treatment removal residual stress：
By rolled piece be placed in temperature be 850 DEG C~1100 DEG C under conditions of keep the temperature, soaking time be 4h~8h, then with
Stove is cooled to room temperature, obtains the TiAl alloy plank with jacket；
Seven, mechanical processing removal jacket：
Using the jacket on TiAl alloy plank of the method removal with jacket of mechanical processing, large scale beta- is obtained
Gamma TiAl alloy planks.
The advantageous effect of specific implementation mode：
1, present embodiment is coated with certain thickness glass lubricant before TiAl alloy rolling inside jacket, and one
Aspect can improve lubricating action opposite between operation of rolling plank and jacket, on the other hand can effectively prevent TiAl alloy
Oxidation behavior in high temperature deformation, while lubricant coating is relatively thicker, is more conducive to the mechanical processing removal jacket in later stage.
2, the roll of milling train is preheated before present embodiment rolling, the temperature drop in the operation of rolling can be reduced
In addition difference selects higher initial temperature of rolling, can improve the finishing temperature of TiAl alloy plank tail end, effectively prevents rolling
The problem of plank cracks during system.
3, heat treatment removal residual stress is carried out to the TiAl alloy plank of jacket after present embodiment rolling, it can be with
The tissue of TiAl alloy plank is homogenized, improves the comprehensive mechanical property of TiAl alloy plank, in addition the elimination of residual stress can
With prevent mechanical processing remove jacket during plank fracture.
Present embodiment obtains the big ruler that size is (1000~1500mm) × (300~500mm) × (1~3mm)
Very little beta-gamma TiAl alloys plank, room temperature tensile intensity can reach 900MPa or more, and temperature-room type plasticity can reach 2%
More than.
Specific implementation mode two：Present embodiment is with one difference of specific implementation mode：Beta described in step 1
Stable element is one kind or in which several mixing in Cr, V and Mn.Other steps are same as the specific embodiment one.
Specific implementation mode three：One of present embodiment and specific implementation mode one or two difference are：It will in step 3
The glass lubricant of spraying 1.5mm~3mm thickness on the inside of the TiAl alloy blank and groove jacket of any surface finish.Other steps with
Specific implementation mode one or two is identical.
Specific implementation mode four：One of present embodiment and specific implementation mode one to three difference are：It will in step 5
The TiAl alloy blank of jacket keeps the temperature 3h~5h in the heat-treatment furnace that temperature is 1240 DEG C~1270 DEG C, obtains pretreated
The roll of milling train is carried out pre-add heat treatment, pretreated jacket TiAl alloy blank is put by jacket TiAl alloy blank
Non-isothermal rolling is carried out on milling train, mill speed is 10mm/s~80mm/s, and pass deformation is 5%~15%, rolls total become
Shape amount is 50%~95%, and it is 1240 DEG C~1270 DEG C that holding temperature is melted down between passage, and soaking time is 30min~60min, is obtained
To rolled piece.Other steps are identical as specific implementation mode one to three.
Specific implementation mode five：One of present embodiment and specific implementation mode one to four difference are：It will in step 5
The TiAl alloy blank of jacket keeps the temperature 1h~3h in the heat-treatment furnace that temperature is 1270 DEG C~1300 DEG C, obtains pretreated
The roll of milling train is carried out pre-add heat treatment, pretreated jacket TiAl alloy blank is put by jacket TiAl alloy blank
Non-isothermal rolling is carried out on milling train, mill speed is 80mm/s~150mm/s, and pass deformation is 15%~30%, and rolling is total
Deflection is 65%~95%, and it is 1270 DEG C~1300 DEG C that holding temperature is melted down between passage, and soaking time is 15min~30min,
Obtain rolled piece.Other steps are identical as specific implementation mode one to four.
Specific implementation mode six：One of present embodiment and specific implementation mode one to five difference are：It will in step 6
Rolled piece is placed under conditions of temperature is 850 DEG C~950 DEG C and is kept the temperature, and soaking time is 4h~8h, then furnace cooling to room
Temperature obtains the TiAl alloy plank with jacket.Other steps are identical as specific implementation mode one to five.
Specific implementation mode seven：One of present embodiment and specific implementation mode one to six difference are：It will in step 6
Rolled piece is placed under conditions of temperature is 950 DEG C~1100 DEG C and is kept the temperature, and soaking time is 4h~8h, then furnace cooling to room
Temperature obtains the TiAl alloy plank with jacket.Other steps are identical as specific implementation mode one to six.
Specific implementation mode eight：One of present embodiment and specific implementation mode one to seven difference are：Institute in step 1
The nominal chemical composition for the TiAl alloy stated is Ti-43Al-9V-0.3Y (at%).Other steps and specific implementation mode one to
Seven is identical.
Specific implementation mode nine：One of present embodiment and specific implementation mode one to eight difference are：It will in step 5
The TiAl alloy blank of jacket keeps the temperature 1h~3h in the heat-treatment furnace that temperature is 1260 DEG C~1280 DEG C, obtains pretreated
The roll of milling train is carried out pre-add heat treatment, pretreated jacket TiAl alloy blank is put by jacket TiAl alloy blank
Non-isothermal rolling is carried out on milling train, mill speed is 30mm/s~150mm/s, and pass deformation is 5%~30%, rolls total become
Shape amount is 50%~95%, and it is 1260 DEG C~1280 DEG C that holding temperature is melted down between passage, and soaking time is 15min~60min, is obtained
To rolled piece.Other steps are identical as specific implementation mode one to eight.
Specific implementation mode ten：One of present embodiment and specific implementation mode one to nine difference are：Institute in step 2
The thickness ratio of the groove jacket stated and TiAl alloy blank is (1~1.5):1.Other steps and one to nine phase of specific implementation mode
Together.
Specific implementation mode 11：One of present embodiment and specific implementation mode one to ten difference are：In step 1
The micro-alloying elements are one kind or in which several mixing in B, Si, C and Y.Other steps and specific embodiment party
Formula one to ten is identical.
The advantageous effect of this hair name is verified using following embodiment：
Embodiment one：A kind of preparation method of large scale beta-gamma TiAl alloy planks is specifically according to the following steps
It completes：
One, the preparation of TiAl alloy blank：
TiAl alloy preform is made using the method for No. bis- hammer coggings of TiAl, then by TiAl alloy preform
Hip treatment is carried out, hip temperature is 1250 DEG C, and hot isostatic pressing pressure is 160MPa, and the hot isostatic pressing time is 4h,
The TiAl alloy preform after hip treatment is processed by block blank using the method for mechanical processing again, obtains TiAl
Alloy blank；
The size of TiAl alloy blank described in step 1 is 10mm × 160mm × 500mm；
The nominal chemical composition of TiAl alloy described in step 1 is Ti-43Al-9V-0.2Y (at%)；
Two, jacket is processed：
Sheath material is processed by groove jacket corresponding with TiAl alloy billet size using the method for mechanical processing；
Sheath material described in step 2 is 304 stainless steels；
The thickness ratio of groove jacket and TiAl alloy blank described in step 2 is 1.5:1；
Three, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for mechanical processing, obtains the TiAl alloy base of any surface finish
Material obtains the glass lubricant of spraying 2.5mm thickness on the inside of the TiAl alloy blank of any surface finish and groove jacket to be coated with profit
The TiAl alloy blank of lubrication prescription and the groove jacket for being coated with lubricant；
Four, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for being coated with lubricant is put into the groove jacket for being coated with lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
Five, the high temperature rolling stage：
The TiAl alloy blank of jacket is kept the temperature into 3h in the heat-treatment furnace that temperature is 1260 DEG C, obtains pretreated packet
TiAl alloy blank is covered, the roll of milling train is subjected to pre-add heat treatment, pretreated jacket TiAl alloy blank is put into and is rolled
Non-isothermal rolling is carried out on machine, mill speed 80mm/s, pass deformation 15%, rolling total deformation is 85%, passage
Between melt down holding temperature be 1260 DEG C, soaking time 20min obtains rolled piece；
Six, homogenization heat treatment removal residual stress：
Rolled piece is placed under conditions of temperature is 900 DEG C and is kept the temperature, soaking time 6h, then furnace cooling to room
Temperature obtains the TiAl alloy plank with jacket；
Seven, mechanical processing removal jacket：
Using the jacket on TiAl alloy plank of the method removal with jacket of mechanical processing, large scale beta- is obtained
Gamma TiAl alloy planks.
The large scale beta-gamma TiAl alloy board dimensions that the present embodiment one is prepared are 1000mm × 510mm
× 1.5mm, room temperature tensile intensity are 900MPa, temperature-room type plasticity 2%.
Embodiment two：A kind of preparation method of large scale beta-gamma TiAl alloy planks is specifically according to the following steps
It completes：
One, the preparation of TiAl alloy blank：
TiAl alloy preform is made using the method for No. bis- hammer coggings of TiAl, then by TiAl alloy preform
Hip treatment is carried out, hip temperature is 1250 DEG C, and hot isostatic pressing pressure is 160MPa, and the hot isostatic pressing time is 4h,
The TiAl alloy preform after hip treatment is processed by block blank using the method for mechanical processing again, obtains TiAl
Alloy blank；
The size of TiAl alloy blank described in step 1 is 10mm × 180mm × 300mm；
The nominal chemical composition of TiAl alloy described in step 1 is Ti-43Al-4Mn-3Cr-0.2Y (at%)；
Two, jacket is processed：
Sheath material is processed by groove jacket corresponding with TiAl alloy billet size using the method for mechanical processing；
Sheath material described in step 2 is 304 stainless steels；
The thickness ratio of groove jacket and TiAl alloy blank described in step 2 is 1.5:1；
Three, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for mechanical processing, obtains the TiAl alloy base of any surface finish
Material obtains the glass lubricant of spraying 2mm thickness on the inside of the TiAl alloy blank of any surface finish and groove jacket to be coated with lubrication
The TiAl alloy blank of agent and the groove jacket for being coated with lubricant；
Four, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for being coated with lubricant is put into the groove jacket for being coated with lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
Five, the high temperature rolling stage：
The TiAl alloy blank of jacket is kept the temperature into 3h in the heat-treatment furnace that temperature is 1280 DEG C, obtains pretreated packet
TiAl alloy blank is covered, the roll of milling train is subjected to pre-add heat treatment, pretreated jacket TiAl alloy blank is put into and is rolled
Non-isothermal rolling is carried out on machine, mill speed 100mm/s, pass deformation 15%, rolling total deformation is 75%, passage
Between melt down holding temperature be 1280 DEG C, soaking time 20min obtains rolled piece；
Six, homogenization heat treatment removal residual stress：
Rolled piece is placed under conditions of temperature is 1000 DEG C and is kept the temperature, soaking time 6h, then furnace cooling to room
Temperature obtains the TiAl alloy plank with jacket；
Seven, mechanical processing removal jacket：
Using the jacket on TiAl alloy plank of the method removal with jacket of mechanical processing, large scale beta- is obtained
Gamma TiAl alloy planks.
The large scale beta-gamma TiAl alloy board dimensions that the present embodiment two is prepared are 1000mm × 310mm
× 1.8mm, room temperature tensile intensity are 900MPa, temperature-room type plasticity 2%.
Claims (5)
1. a kind of preparation method of large scale beta-gamma TiAl alloy planks, it is characterised in that a kind of large scale beta-
What the preparation method of gamma TiAl alloy planks was specifically realized by the following steps：
One, the preparation of TiAl alloy blank：
TiAl alloy preform is made using the method for No. bis- hammer coggings of TiAl, then carries out TiAl alloy preform
Hip treatment, hip temperature are 1000 DEG C~1250 DEG C, and hot isostatic pressing pressure is 140MPa~200MPa, and heat etc. is quiet
The pressure time is 1h~5h, then using the method for mechanical processing that the TiAl alloy preform processing after hip treatment is blocking
Body blank obtains TiAl alloy blank；
The nominal chemical composition of TiAl alloy described in step 1 is Ti-43Al-9V-0.2Y (at%) or Ti-43Al-4Mn-
(3Cr-0.2Y at%)；
The thickness of TiAl alloy blank described in step 1 is 10mm~30mm, and width is 100mm~500mm, and length is
300mm~500mm；
Two, jacket is processed：
Sheath material is processed by groove jacket corresponding with TiAl alloy billet size using the method for mechanical processing；
Sheath material described in step 2 is stainless steel, pure titanium or titanium alloy；
The thickness ratio of groove jacket and TiAl alloy blank described in step 2 is (1~3):1；
Three, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for mechanical processing, obtains the TiAl alloy blank of any surface finish,
By the glass lubricant of spraying 1mm~5mm thickness on the inside of the TiAl alloy blank of any surface finish and groove jacket, obtain being coated with profit
The TiAl alloy blank of lubrication prescription and the groove jacket for being coated with lubricant；
Four, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for being coated with lubricant is put into the groove jacket for being coated with lubricant, the method for recycling soldering carries out
Soldering and sealing obtains the TiAl alloy blank of jacket；
Five, the high temperature rolling stage：
The TiAl alloy blank of jacket is kept the temperature into 3h in the heat-treatment furnace that temperature is 1260 DEG C~1280 DEG C, after obtaining pretreatment
Jacket TiAl alloy blank, the roll of milling train is subjected to pre-add heat treatment, pretreated jacket TiAl alloy blank is put
Non-isothermal rolling is carried out on to milling train, mill speed is 80mm/s~100mm/s, and pass deformation 15% rolls total deformation
Amount is 75%~85%, and it is 1260 DEG C~1280 DEG C that holding temperature is melted down between passage, and soaking time 20min obtains rolled piece；
Six, homogenization heat treatment removal residual stress：
Rolled piece is placed under conditions of temperature is 850 DEG C~1100 DEG C and is kept the temperature, soaking time is 4h~8h, then with furnace cooling
But room temperature is arrived, the TiAl alloy plank with jacket is obtained；
Seven, mechanical processing removal jacket：
Using the jacket on TiAl alloy plank of the method removal with jacket of mechanical processing, large scale beta-gamma is obtained
TiAl alloy plank.
2. a kind of preparation method of large scale beta-gamma TiAl alloy planks according to claim 1, feature exist
By the glass lubrication of spraying 1.5mm~3mm thickness on the inside of the TiAl alloy blank of any surface finish and groove jacket in step 3
Agent.
3. a kind of preparation method of large scale beta-gamma TiAl alloy planks according to claim 1, feature exist
Rolled piece is placed under conditions of temperature is 850 DEG C~950 DEG C in step 6 and is kept the temperature, soaking time is 4h~8h, then
Furnace cooling obtains the TiAl alloy plank with jacket to room temperature.
4. a kind of preparation method of large scale beta-gamma TiAl alloy planks according to claim 1, feature exist
Rolled piece is placed under conditions of temperature is 950 DEG C~1100 DEG C in step 6 and is kept the temperature, soaking time is 4h~8h, then
Furnace cooling obtains the TiAl alloy plank with jacket to room temperature.
5. a kind of preparation method of large scale beta-gamma TiAl alloy planks according to claim 1, feature exist
The thickness ratio of groove jacket and TiAl alloy blank described in step 2 is (1~1.5):1.
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| CN201710502760.6A CN107267902B (en) | 2017-06-27 | 2017-06-27 | A kind of preparation method of large scale beta-gamma TiAl alloy planks |
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| CN201710502760.6A CN107267902B (en) | 2017-06-27 | 2017-06-27 | A kind of preparation method of large scale beta-gamma TiAl alloy planks |
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| CN107267902B true CN107267902B (en) | 2018-10-02 |
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| CN108385046B (en) * | 2018-04-23 | 2021-01-19 | 江苏理工学院 | Heat treatment method of TiAl-V alloy |
| CN109909409B (en) * | 2019-03-20 | 2020-11-03 | 西北工业大学 | Preparation method of TNM alloy forging stock with uniform structure |
| CN114150242B (en) * | 2021-11-25 | 2023-07-18 | 南京理工大学 | Method for inhibiting coarsening of light high-strength TiAl alloy sheet |
| CN114346136B (en) * | 2021-12-27 | 2022-09-09 | 武汉理工大学 | TiAl turbine blade stress-temperature double plastic-increasing near-net forming method |
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