CN107267902A - A kind of preparation method of large scale beta gamma TiAl alloy sheet materials - Google Patents
A kind of preparation method of large scale beta gamma TiAl alloy sheet materials Download PDFInfo
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- CN107267902A CN107267902A CN201710502760.6A CN201710502760A CN107267902A CN 107267902 A CN107267902 A CN 107267902A CN 201710502760 A CN201710502760 A CN 201710502760A CN 107267902 A CN107267902 A CN 107267902A
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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 sheet materials, is related to a kind of preparation method of TiAl alloy sheet material.The invention aims to solve because TiAl alloy hot processing window is narrow, temperature drop in the non-isothermal operation of rolling causes during preparing large scale TiAl alloy sheet material sheet material the problem of easily ftracture, shape hardly possible, and the problem of be machined sheet material secondary breakdown during removal jacket.Method：First, the preparation of TiAl alloy blank；2nd, jacket is processed；3rd, sprayed glass lubricant；4th, soldering and sealing TiAl alloy blank；5th, the high temperature rolling stage；6th, homogenization heat treatment removes residual stress；7th, machining removes jacket, that is, obtains large scale beta gamma TiAl alloy sheet materials.The present invention is applied to the preparation of large scale beta gamma TiAl alloy sheet materials.
Description
Technical field
The present invention relates to a kind of preparation method of TiAl alloy sheet material.
Background technology
TiAl alloy has a 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
Be the further combination property for improving aircraft as Aeronautics and Astronautics technology quickly develops, to the overall loss of weight of aircraft and
Endurance proposes higher requirement, and the development of traditional high temperature Ti alloys has 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 sheet material can be used for preparing covering, the housing of jet engine, the nozzle of helicopter of aircraft etc.,
The weight of aircraft can be greatly reduced, has a extensive future.But the hot processing window of TiAl alloy is narrow, high temperature deformation
Difficulty, the defect such as is easy to crack in the hot-working operation of rolling, large scale TiAl is rolled particularly with traditional non-isothermal
Temperature drop is too fast in sheet alloy, the operation of rolling, causes TiAl alloy sheet material tail end to be easy to crack, and crackle, which is once produced, to exist
It can be further expanded in the follow-up operation of rolling, the fracture for causing sheet material overall.Further, since residual stress in the operation of rolling
In the presence of and tissue inhomogeneities, cause to remove jacket in follow-up machining easily producing fracture, constrain large scale
The production and Practical Project application of TiAl alloy.Existing TiAl alloy sheet material technology of preparing (i.e. non-isothermal rolling technique) is very
Hardly possible obtains large scale, high-quality sheet alloy, at present, and the TiAl alloy sheet material full-size prepared using this technology is only
800mm × 400mm × 1mm, temperature-room type plasticity is less than 2%.
The content of the invention
The invention aims to solve because TiAl alloy hot processing window is narrow, the temperature drop in the non-isothermal operation of rolling is led
The problem of sheet material easily ftractures, shapes hardly possible during cause preparation large scale TiAl alloy sheet material, and machining remove jacket
During sheet material secondary breakdown the problem of, and provide a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials.
What a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials was specifically realized by the following steps：
First, 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, high temperature insostatic pressing (HIP) 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 machining
Into block blank, TiAl alloy blank is obtained；
The nominal chemical composition of TiAl alloy described in step one 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 one is 10mm~30mm, and width is 100mm~500mm, length
For 300mm~500mm；
2nd, jacket is processed：
Sheath material is processed into using the method for machining by the groove jacket corresponding with TiAl alloy billet size；
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；
3rd, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for machining, the TiAl alloy base of any surface finish is obtained
Material, the thick glass lubricants of spraying 1mm~5mm on the inside of the TiAl alloy blank of any surface finish and groove jacket are applied
There is the TiAl alloy blank of lubricant and scribble the groove jacket of lubricant；
4th, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for scribbling lubricant is put into the groove jacket for scribbling lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
5th, the high temperature rolling stage：
The TiAl alloy blank of jacket is incubated 1h~5h in temperature is 1240 DEG C~1300 DEG C of heat-treatment furnace, obtained
Pretreated jacket TiAl alloy blank, pre-add heat treatment is carried out by the roll of milling train, and pretreated jacket TiAl is closed
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；
6th, homogenization heat treatment removes residual stress：
Rolled piece is placed in temperature to be incubated under conditions of 850 DEG C~1100 DEG C, soaking time is 4h~8h, Ran Housui
Stove is cooled to room temperature, obtains the TiAl alloy sheet material with jacket；
7th, machining removes jacket：
The jacket on the TiAl alloy sheet material with jacket is removed using the method for machining, large scale beta- is obtained
Gamma TiAl alloy sheet materials.
Advantages of the present invention：
1st, the present invention scribbles certain thickness glass lubricant before TiAl alloy rolling inside jacket, on the one hand can be with
Lubrication relative between operation of rolling sheet material and jacket is improved, on the other hand can effectively prevent TiAl alloy from becoming in high temperature
Oxidation behavior in shape, while lubricant coating is relatively thicker, is more conducive to the machining in later stage to remove jacket.
2nd, 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
The higher initial temperature of rolling of selection, can improve the finishing temperature of TiAl alloy sheet material tail end, effectively prevent the operation of rolling
The problem of middle sheet material ftractures.
3rd, heat treatment removal residual stress is carried out to the TiAl alloy sheet material of jacket after present invention rolling, can homogenized
The tissue of TiAl alloy sheet material, improves the comprehensive mechanical property of TiAl alloy sheet material, and the elimination of residual stress in addition can be prevented
Machining removes the fracture of sheet material during jacket.
The present invention obtains the large scale beta- that size is (1000~1500mm) × (300~500mm) × (1~3mm)
Gamma TiAl alloy sheet materials, room temperature tensile intensity can reach more than 900MPa, and temperature-room type plasticity can reach more than 2%.
The present invention is used for a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials.
Embodiment
Embodiment one：Present embodiment is a kind of preparation side of large scale beta-gamma TiAl alloy sheet materials
What method was specifically realized by the following steps：
First, 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, high temperature insostatic pressing (HIP) 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 machining
Into block blank, TiAl alloy blank is obtained；
The nominal chemical composition of TiAl alloy described in step one 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 one is 10mm~30mm, and width is 100mm~500mm, length
For 300mm~500mm；
2nd, jacket is processed：
Sheath material is processed into using the method for machining by the groove jacket corresponding with TiAl alloy billet size；
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；
3rd, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for machining, the TiAl alloy base of any surface finish is obtained
Material, the thick glass lubricants of spraying 1mm~5mm on the inside of the TiAl alloy blank of any surface finish and groove jacket are applied
There is the TiAl alloy blank of lubricant and scribble the groove jacket of lubricant；
4th, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for scribbling lubricant is put into the groove jacket for scribbling lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
5th, the high temperature rolling stage：
The TiAl alloy blank of jacket is incubated 1h~5h in temperature is 1240 DEG C~1300 DEG C of heat-treatment furnace, obtained
Pretreated jacket TiAl alloy blank, pre-add heat treatment is carried out by the roll of milling train, and pretreated jacket TiAl is closed
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；
6th, homogenization heat treatment removes residual stress：
Rolled piece is placed in temperature to be incubated under conditions of 850 DEG C~1100 DEG C, soaking time is 4h~8h, Ran Housui
Stove is cooled to room temperature, obtains the TiAl alloy sheet material with jacket；
7th, machining removes jacket：
The jacket on the TiAl alloy sheet material with jacket is removed using the method for machining, large scale beta- is obtained
Gamma TiAl alloy sheet materials.
The beneficial effect of embodiment：
1st, present embodiment scribbles certain thickness glass lubricant, one before TiAl alloy rolling inside jacket
Aspect can improve lubrication relative between operation of rolling sheet material 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 machining in later stage to remove jacket.
2nd, the roll of milling train is preheated before present embodiment rolling, the temperature drop in the operation of rolling can be reduced
Difference, selects higher initial temperature of rolling in addition, can improve the finishing temperature of TiAl alloy sheet material tail end, effectively prevent and roll
The problem of sheet material ftractures during system.
3rd, heat treatment is carried out to the TiAl alloy sheet material of jacket after present embodiment rolling and removes residual stress, can be with
The tissue of TiAl alloy sheet material is homogenized, the comprehensive mechanical property of TiAl alloy sheet material is improved, the elimination of residual stress can in addition
To prevent machining from removing the fracture of sheet material during jacket.
Present embodiment obtains the big chi that size is (1000~1500mm) × (300~500mm) × (1~3mm)
Very little beta-gamma TiAl alloys sheet material, room temperature tensile intensity can reach more than 900MPa, and temperature-room type plasticity can reach 2%
More than.
Embodiment two：Present embodiment is with the difference of embodiment one：Beta described in step one
Stable element is one kind in Cr, V and Mn or wherein several mixing.Other steps are identical with embodiment one.
Embodiment three：One of present embodiment and embodiment one or two difference is：Will in step 3
Glass lubricant thick spraying 1.5mm~3mm on the inside of the TiAl alloy blank and groove jacket of any surface finish.Other steps with
Embodiment one or two is identical.
Embodiment four：One of present embodiment and embodiment one to three difference is：Will in step 5
The TiAl alloy blank of jacket is incubated 3h~5h in temperature is 1240 DEG C~1270 DEG C of heat-treatment furnace, obtains pretreated
Jacket TiAl alloy blank, carries out pre-add heat treatment by the roll of milling train, pretreated jacket TiAl alloy blank is put into
Non-isothermal rolling is carried out on milling train, mill speed is 10mm/s~80mm/s, and pass deformation is 5%~15%, and rolling is total to be 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 with embodiment one to three.
Embodiment five：One of present embodiment and embodiment one to four difference is：Will in step 5
The TiAl alloy blank of jacket is incubated 1h~3h in temperature is 1270 DEG C~1300 DEG C of heat-treatment furnace, obtains pretreated
Jacket TiAl alloy blank, carries out pre-add heat treatment by the roll of milling train, pretreated jacket TiAl alloy blank is put into
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 with embodiment one to four.
Embodiment six：One of present embodiment and embodiment one to five difference is：Will in step 6
Rolled piece is placed in temperature to be incubated under conditions of 850 DEG C~950 DEG C, and soaking time is 4h~8h, and then furnace cooling is to room
Temperature, obtains the TiAl alloy sheet material with jacket.Other steps are identical with embodiment one to five.
Embodiment seven：One of present embodiment and embodiment one to six difference is：Will in step 6
Rolled piece is placed in temperature to be incubated under conditions of 950 DEG C~1100 DEG C, and soaking time is 4h~8h, and then furnace cooling is to room
Temperature, obtains the TiAl alloy sheet material with jacket.Other steps are identical with embodiment one to six.
Embodiment eight：One of present embodiment and embodiment one to seven difference is：Institute in step one
The nominal chemical composition for the TiAl alloy stated is Ti-43Al-9V-0.3Y (at%).Other steps and embodiment one to
Seven is identical.
Embodiment nine：One of present embodiment and embodiment one to eight difference is：Will in step 5
The TiAl alloy blank of jacket is incubated 1h~3h in temperature is 1260 DEG C~1280 DEG C of heat-treatment furnace, obtains pretreated
Jacket TiAl alloy blank, carries out pre-add heat treatment by the roll of milling train, pretreated jacket TiAl alloy blank is put into
Non-isothermal rolling is carried out on milling train, mill speed is 30mm/s~150mm/s, and pass deformation is 5%~30%, and rolling is total to be 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 with embodiment one to eight.
Embodiment ten：One of present embodiment and embodiment one to nine difference is：Institute in step 2
The thickness ratio of the groove jacket stated and TiAl alloy blank is (1~1.5):1.Other steps and the phase of embodiment one to nine
Together.
Embodiment 11：One of present embodiment and embodiment one to ten difference is：In step one
Described micro-alloying elements are one kind in B, Si, C and Y or wherein several mixing.Other steps and specific embodiment party
Formula one to ten is identical.
The beneficial effect of this hair name is verified using following examples：
Embodiment one：A kind of preparation method of large scale beta-gamma TiAl alloy sheet materials is specifically according to the following steps
Complete：
First, 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, high temperature insostatic pressing (HIP) pressure is 160MPa, the high temperature insostatic pressing (HIP) time is 4h,
The TiAl alloy preform after hip treatment is processed into by block blank using the method for machining again, TiAl is obtained
Alloy blank；
The size of TiAl alloy blank described in step one is 10mm × 160mm × 500mm；
The nominal chemical composition of TiAl alloy described in step one is Ti-43Al-9V-0.2Y (at%)；
2nd, jacket is processed：
Sheath material is processed into using the method for machining by the groove jacket corresponding with TiAl alloy billet size；
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；
3rd, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for machining, the TiAl alloy base of any surface finish is obtained
Material, the thick glass lubricants of spraying 2.5mm on the inside of the TiAl alloy blank of any surface finish and groove jacket obtain scribbling profit
The TiAl alloy blank of lubrication prescription and the groove jacket for scribbling lubricant；
4th, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for scribbling lubricant is put into the groove jacket for scribbling lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
5th, the high temperature rolling stage：
The TiAl alloy blank of jacket is incubated 3h in temperature is 1260 DEG C of heat-treatment furnace, pretreated bag is obtained
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 rolled
Non-isothermal rolling is carried out on machine, mill speed is 80mm/s, and pass deformation is 15%, rolling total deformation is 85%, passage
Between melt down holding temperature for 1260 DEG C, soaking time is 20min, obtains rolled piece；
6th, homogenization heat treatment removes residual stress：
Rolled piece is placed in temperature to be incubated under conditions of 900 DEG C, soaking time is 6h, then furnace cooling is to room
Temperature, obtains the TiAl alloy sheet material with jacket；
7th, machining removes jacket：
The jacket on the TiAl alloy sheet material with jacket is removed using the method for machining, large scale beta- is obtained
Gamma TiAl alloy sheet materials.
The large scale beta-gamma TiAl alloys board dimension that the present embodiment one is prepared is 1000mm × 510mm
× 1.5mm, room temperature tensile intensity is 900MPa, and temperature-room type plasticity is 2%.
Embodiment two：A kind of preparation method of large scale beta-gamma TiAl alloy sheet materials is specifically according to the following steps
Complete：
First, 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, high temperature insostatic pressing (HIP) pressure is 160MPa, the high temperature insostatic pressing (HIP) time is 4h,
The TiAl alloy preform after hip treatment is processed into by block blank using the method for machining again, TiAl is obtained
Alloy blank；
The size of TiAl alloy blank described in step one is 10mm × 180mm × 300mm；
The nominal chemical composition of TiAl alloy described in step one is Ti-43Al-4Mn-3Cr-0.2Y (at%)；
2nd, jacket is processed：
Sheath material is processed into using the method for machining by the groove jacket corresponding with TiAl alloy billet size；
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；
3rd, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for machining, the TiAl alloy base of any surface finish is obtained
Material, the thick glass lubricants of spraying 2mm on the inside of the TiAl alloy blank of any surface finish and groove jacket obtain scribbling lubrication
The TiAl alloy blank of agent and the groove jacket for scribbling lubricant；
4th, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for scribbling lubricant is put into the groove jacket for scribbling lubricant, the method for recycling soldering
Soldering and sealing is carried out, the TiAl alloy blank of jacket is obtained；
5th, the high temperature rolling stage：
The TiAl alloy blank of jacket is incubated 3h in temperature is 1280 DEG C of heat-treatment furnace, pretreated bag is obtained
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 rolled
Non-isothermal rolling is carried out on machine, mill speed is 100mm/s, and pass deformation is 15%, rolling total deformation is 75%, passage
Between melt down holding temperature for 1280 DEG C, soaking time is 20min, obtains rolled piece；
6th, homogenization heat treatment removes residual stress：
Rolled piece is placed in temperature to be incubated under conditions of 1000 DEG C, soaking time is 6h, then furnace cooling is to room
Temperature, obtains the TiAl alloy sheet material with jacket；
7th, machining removes jacket：
The jacket on the TiAl alloy sheet material with jacket is removed using the method for machining, large scale beta- is obtained
Gamma TiAl alloy sheet materials.
The large scale beta-gamma TiAl alloys board dimension that the present embodiment two is prepared is 1000mm × 310mm
× 1.8mm, room temperature tensile intensity is 900MPa, and temperature-room type plasticity is 2%.
Claims (10)
1. a kind of a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials, it is characterised in that large scale beta-
What the preparation method of gamma TiAl alloy sheet materials was specifically realized by the following steps：
First, the preparation of TiAl alloy blank：
TiAl alloy preform is made using the method for No. bis- hammer coggings of TiAl, then TiAl alloy preform is carried out
Hip treatment, hip temperature is 1000 DEG C~1250 DEG C, and high temperature insostatic pressing (HIP) pressure is 140MPa~200MPa, and heat etc. is quiet
The pressure time is 1h~5h, then using the method for machining 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 one is Ti- (40~45) Al- (7~9) X- (0.1~0.5) Z
(at%), wherein X is beta stable elements, and Z is micro-alloying elements；
The thickness of TiAl alloy blank described in step one is 10mm~30mm, and width is 100mm~500mm, and length is
300mm~500mm；
2nd, jacket is processed：
Sheath material is processed into using the method for machining by the groove jacket corresponding with TiAl alloy billet size；
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；
3rd, sprayed glass lubricant：
TiAl alloy blank is carried out by surface polishing using the method for machining, the TiAl alloy blank of any surface finish is obtained,
By the thick glass lubricants of spraying 1mm~5mm on the inside of the TiAl alloy blank of any surface finish and groove jacket, obtain scribbling profit
The TiAl alloy blank of lubrication prescription and the groove jacket for scribbling lubricant；
4th, soldering and sealing TiAl alloy blank：
The TiAl alloy blank for scribbling lubricant is put into the groove jacket for scribbling lubricant, recycles the method for soldering to carry out
Soldering and sealing, obtains the TiAl alloy blank of jacket；
5th, the high temperature rolling stage：
The TiAl alloy blank of jacket is incubated 1h~5h in temperature is 1240 DEG C~1300 DEG C of heat-treatment furnace, pre- place is obtained
Jacket TiAl alloy blank after reason, carries out pre-add heat treatment, by pretreated jacket TiAl alloy base by the roll of milling train
Material is put into progress non-isothermal rolling on milling train, and mill speed is 10mm/s~150mm/s, and pass deformation is 5%~30%, is rolled
Total deformation processed is 50%~95%, and it is 1240 DEG C~1300 DEG C that holding temperature is melted down between passage, soaking time be 15min~
60min, obtains rolled piece；
6th, homogenization heat treatment removes residual stress：
Rolled piece is placed in temperature to be incubated under conditions of 850 DEG C~1100 DEG C, soaking time is 4h~8h, then cold with stove
But room temperature is arrived, the TiAl alloy sheet material with jacket is obtained；
7th, machining removes jacket：
The jacket on the TiAl alloy sheet material with jacket is removed using the method for machining, large scale beta-gamma is obtained
TiAl alloy sheet material.
2. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
Beta stable elements described in step one are one kind in Cr, V and Mn or wherein several mixing.
3. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
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.
4. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
The TiAl alloy blank of jacket is incubated 3h~5h in temperature is 1240 DEG C~1270 DEG C of heat-treatment furnace in step 5, obtained
To pretreated jacket TiAl alloy blank, the roll of milling train is subjected to pre-add heat treatment, by pretreated jacket TiAl
Alloy blank is put on milling train progress non-isothermal rolling, and mill speed is 10mm/s~80mm/s, and pass deformation is 5%~
15%, rolling total deformation 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, obtains rolled piece.
5. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
The TiAl alloy blank of jacket is incubated 1h~3h in temperature is 1270 DEG C~1300 DEG C of heat-treatment furnace in step 5, obtained
To pretreated jacket TiAl alloy blank, the roll of milling train is subjected to pre-add heat treatment, by pretreated jacket TiAl
Alloy blank is put on milling train progress non-isothermal rolling, and mill speed is 80mm/s~150mm/s, and pass deformation is 15%~
30%, rolling total deformation 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, obtains rolled piece.
6. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
Rolled piece is placed in temperature to be incubated under conditions of 850 DEG C~950 DEG C in step 6, soaking time is 4h~8h, then
Furnace cooling obtains the TiAl alloy sheet material with jacket to room temperature.
7. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
Rolled piece is placed in temperature to be incubated under conditions of 950 DEG C~1100 DEG C in step 6, soaking time is 4h~8h, then
Furnace cooling obtains the TiAl alloy sheet material with jacket to room temperature.
8. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
The nominal chemical composition of TiAl alloy described in step one is Ti-43Al-9V-0.3Y (at%).
9. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature exists
The TiAl alloy blank of jacket is incubated 1h~3h in temperature is 1260 DEG C~1280 DEG C of heat-treatment furnace in step 5, obtained
To pretreated jacket TiAl alloy blank, the roll of milling train is subjected to pre-add heat treatment, by pretreated jacket TiAl
Alloy blank is put on milling train progress non-isothermal rolling, and mill speed is 30mm/s~150mm/s, and pass deformation is 5%~
30%, rolling total deformation 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, obtains rolled piece.
10. a kind of preparation method of large scale beta-gamma TiAl alloy sheet materials according to claim 1, its feature
The thickness ratio for being the groove jacket described in step 2 and TiAl alloy blank is (1~1.5):1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108385046A (en) * | 2018-04-23 | 2018-08-10 | 江苏理工学院 | A kind of heat treatment method of TiAl-V alloys |
| CN109909409A (en) * | 2019-03-20 | 2019-06-21 | 西北工业大学 | A kind of preparation method of even tissue TNM alloy forging stock |
| CN114150242A (en) * | 2021-11-25 | 2022-03-08 | 南京理工大学 | Method for inhibiting coarsening of light high-strength TiAl alloy lamella |
| CN114346136A (en) * | 2021-12-27 | 2022-04-15 | 武汉理工大学 | TiAl turbine blade stress-temperature double plastic-increasing near-net forming method |
-
2017
- 2017-06-27 CN CN201710502760.6A patent/CN107267902B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108385046A (en) * | 2018-04-23 | 2018-08-10 | 江苏理工学院 | A kind of heat treatment method of TiAl-V alloys |
| CN109909409A (en) * | 2019-03-20 | 2019-06-21 | 西北工业大学 | A kind of preparation method of even tissue TNM alloy forging stock |
| CN114150242A (en) * | 2021-11-25 | 2022-03-08 | 南京理工大学 | Method for inhibiting coarsening of light high-strength TiAl alloy lamella |
| 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 |
| CN114346136A (en) * | 2021-12-27 | 2022-04-15 | 武汉理工大学 | TiAl turbine blade stress-temperature double plastic-increasing near-net forming method |
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