CN107746989B - A kind of superhigh intensity Ti-Al-Zr-Mo-Cr system's beta-titanium alloy and its heat treatment process - Google Patents
A kind of superhigh intensity Ti-Al-Zr-Mo-Cr system's beta-titanium alloy and its heat treatment process Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C14/00—Alloys based on titanium
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- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- 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
Abstract
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is carried out solution treatment, then carries out ageing treatment by a kind of superhigh intensity Ti-Al-Zr-Mo-Cr system's beta-titanium alloy and its heat treatment process；Wherein, Ti-Al-Zr-Mo-Cr system beta-titanium alloy by weight percentage, including 4.5~5.5% Al, 3.5~4.5% Zr, the Cr of 9.5~10.5% Mo and 2.5~3.5%, surplus Ti.The intensity that alloy of the present invention can get superelevation after melting, forging and strenthen-toughening mechanizm has both plasticity simultaneously.Alloy of the present invention joined a certain amount of neutral element Zr again while Al is added, so that α phase obtains further reinforcing；The addition of high quality percentage Mo element is to strengthen β matrix.In addition, can also reduce temperature sensitivity of the alloy in two-phase section forging due to the low diffusion rate of Mo, expand alloy process window.
Description
Technical field
The invention belongs to technical field of alloy material, and in particular to a kind of superhigh intensity Ti-Al-Zr-Mo-Cr system β titanium closes
Gold and its heat treatment process.
Technical background
Since first commercialization beta-titanium alloy Ti-13-11-3 was born and was successfully applied to SR-71 blackbird opportunity of combat nineteen fifty-two,
Beta-titanium alloy is since that there is high-intensitive, excellent plasticity and toughness matching and good cold forming capability to be constantly subjected to is both domestic and external for it
Extensive concern.Especially close β and metastable beta alloy, have both the performance advantage of two phase alloys and beta alloy, in work nearly ten years
Quickly development is obtained in industry application.
The high-strength alloy of early stage Mo equivalent mostly with higher obtains the α of Dispersed precipitate by solid solution plus ageing treatment
Mutually to reinforced alloys.It is typical to represent β-C alloy, the Ti-15-3 alloy for having west, and TB2, TB3 alloy of China.This
Class alloy easily forms segregation and the defects of β spot due to high beta stable element content in fusion process, while in timeliness mistake
In journey formed grain boundary α phase and without be precipitated area (PFZ) tendency it is strong.In recent years using VT-22, Ti5553, TB10 and β-CEZ as generation
The beta alloy of table effectively overcomes the above problem.By reducing the easily segregation element content such as Cr, Fe and controlling smelting technology, make
The formability for obtaining β spot substantially reduces.Meanwhile low Mo equivalent improves α phase nuclear driving force, changes alloy aging power
It learns, so that α phase is more evenly distributed, to can get excellent mechanical property.However, the alloy exists by taking Ti-5553 alloy as an example
1200MPa rank has the excellent matching of strong plasticity and fatigue behaviour, and with the further raising of alloy strength, plasticity is significant
Decline.The TB10 alloy of the domestic coloured institute's research and development in Beijing passes through heat treatment process R appropriatemIt can reach 1300MPa rank,
It is successfully applied in the orbital cabin of Divine Land two and satellite and the rocket connection system, but in the Service Environment of higher intensity, application
It is also restrained.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of superhigh intensity Ti-Al-Zr-Mo-Cr system β titaniums
Alloy and its heat treatment process.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of superhigh intensity Ti-Al-Zr-Mo-Cr system beta-titanium alloy, by weight percentage, including 4.5~5.5%
Al, 3.5~4.5% Zr, the Cr of 9.5~10.5% Mo and 2.5~3.5%, surplus be Ti and inevitably it is miscellaneous
Prime element.
The present invention is into one improvement, by weight percentage, including 5~5.1% Al, 4.06~4.15%
Zr, 9.8%~10% Mo, 3.03~3.15% Cr, surplus are Ti and inevitable impurity.
The present invention is into one improvement, when Ti-Al-Zr-Mo-Cr system beta-titanium alloy being carried out solution treatment, then being carried out
Effect processing.
The present invention is into one improvement, carries out solution treatment, then carry out the detailed process of ageing treatment are as follows: in two-phase
The progress 3h solution treatment of 780~800 DEG C of area, water quenching to room temperature, then in 580~600 DEG C of progress, 8 hours timeliness.
The present invention is into one improvement, carries out solution treatment, then carry out the detailed process of ageing treatment are as follows: exist first
Progress 40~45min the solution treatment of 865~885 DEG C of monophase field, then slowly cools to 580~600 with 3~5 DEG C/min cooling rate
DEG C, and keep the temperature 6~8h.
The present invention is that Ti-Al-Zr-Mo-Cr system beta-titanium alloy is made by the following method into one improvement: selection phase
The raw material answered enters furnace and to carry out multiple smelting in suspension and obtain ingot casting, ingot casting by raw material is in bulk using cold crucible levitation melting method
Cogging forging, high temperature forging and heat treatment after forging are carried out after stripping off the skin and cutting riser obtains Ti-Al-Zr-Mo-Cr system β titanium
Alloy.
The present invention is that Ti-Al-Zr-Mo-Cr system beta-titanium alloy is made by the following method: by Ti- into one improvement
32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al and titanium sponge, sponge zirconium according to the proportion be uniformly mixed and it is in bulk enter furnace, with
After carry out cold crucible levitation melting, be passed through argon gas in fusion process, induced current is 350~400A, power frequency is 20~
25KHz continues 3~5min of holding after alloy is completely melt, cooling to obtain ingot casting, then carries out cogging forging and height to ingot casting
Warm forging is made, and Ti-Al-Zr-Mo-Cr system beta-titanium alloy is obtained.
The present invention is that the cogging temperature of cogging forging is 1020~1050 DEG C, and soaking time is into one improvement
90min, deflection are not less than 60%.
The present invention is that the temperature of high temperature forging is 930~950 DEG C, and deflection is not less than 50% into one improvement.
Compared with prior art, the invention has the following advantages:
The present invention designs a kind of Ti- by critical Mo Equivalent method and the d electron theory based on first-principles calculations
Al-Zr-Mo-Cr system beta-titanium alloy, the alloy can get superhigh intensity and comparable plasticity after heat treatment appropriate,
Room temperature tensile intensity RmIt is 11% not less than 1500MPa, elongation after fracture A.4.5~5.5% mass fraction Al are being added in alloy
While, the Zr element for being also added into 3.5~4.5% mass fractions further strengthens α phase.Under normal conditions, beta-titanium alloy is close
Deformation starts from the preferential sliding of isometric α phase, then generates stress at phase interface and concentrates, to open the sliding in β matrix.It is logical
Al, Zr complex intensifying are crossed, the stress level that isometric α phase in alloy starts deformation can be improved, to obtain high intensity.It closes simultaneously
Isomorphism beta stable element Mo in gold containing 9.5~10.5% mass fractions.Due to Mo diffusion rate low in bcc-Ti,
Temperature sensitivity of the alloy in two-phase section forging can be reduced, expands alloy process window, reduces organizational controls difficulty.In addition
The addition of Mo inhibits the generation of Ti-Cr eutectoid reaction, improves alloy thermal stability.
The present invention then carries out ageing treatment, can get by the way that Ti-Al-Zr-Mo-Cr system beta-titanium alloy is carried out solution treatment
The intensity of superelevation has both plasticity simultaneously.Alloy of the present invention joined a certain amount of neutral element Zr again while Al is added, so that α
Mutually obtain further strengthen；The addition of high quality percentage Mo element is to strengthen β matrix.In addition, due to the low diffusion of Mo
Rate can also reduce temperature sensitivity of the alloy in two-phase section forging, expand alloy process window.
Further, for alloy first in two-phase section solution treatment, water cooling then carries out timeliness, air-cooled after forging；The present invention is logical
Crossing above-mentioned technique can get isometric α phase, the composite construction of corynebacterium α phase and small and dispersed lenticular α phase, the conjunction of such tissue
Gold had not only had the intensity of superelevation but also had had good plasticity.
Further, alloy carries out monophase field solution treatment first after forging, proper temperature is slowly cooled to furnace, with laggard
Row timeliness, it is air-cooled (BASCA technique).The present invention can get coarse sheet α phase by above-mentioned heat treatment process, in coarse alpha piece
Tiny α phase is precipitated between layer, the alloy of such tissue has higher intensity and acceptable plasticity.
Detailed description of the invention
Fig. 1 is 790 DEG C/3h of alloy solid solution, the microscopic structure after 600 DEG C/8h timeliness.
Fig. 2 is 790 DEG C/3h of alloy solid solution, the Typical tensile curve of 600 DEG C/8h timeliness.
Fig. 3 is 790 DEG C/3h of alloy solid solution, the stretching fracture of 600 DEG C/8h timeliness.
Fig. 4 is the microscopic structure after alloy BASCA technique.
Fig. 5 is the stretching fracture after alloy BASCA technique.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Titanium alloy of the present invention can obtain excellent strong plasticity matching, room temperature by strenthen-toughening mechanizm technique appropriate
Tensile strength RmIt is 11% not less than 1500MPa, elongation after fracture A.
The strong beta-titanium alloy of superelevation of the present invention is by following weight percent at being grouped as: 4.5~5.5% Al, 3.5~
4.5% Zr, the Cr of 9.5~10.5% Mo and 2.5~3.5%, surplus are Ti and inevitable impurity element.
Preferably, by following weight percent at being grouped as: 5~5.1% Al, 4.06~4.15% Zr, 9.8%
~10% Mo, 3.03~3.15% Cr, surplus are Ti and inevitable impurity.
The preparation method of the strong beta-titanium alloy of superelevation of the present invention is used the following steps are included: being different from conventional titanium alloy smelting
Vacuum consumable electrode arc furnace (VAR), the present invention use advanced cold crucible levitation melting method (CCLM).It selects according to actual needs
Type of feed is selected, calculates and raw material proportioning and is uniformly mixed according to alloying component, raw material is in bulk to enter furnace and to carry out 3 smelting in suspension and obtain
Obtain ingot casting.Ingot casting carries out cogging, high temperature forging and heat treatment after forging after stripping off the skin and cutting riser and obtains superstrength alloy
Plate.
Specifically, raw material involved in the alloy melting includes: Al-Mo, Ti-Mo intermediate alloy, pure Cr, and fine aluminium beans, 0
Grade titanium sponge and sponge zirconium.First, in accordance with design ingredient, by Ti-32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al, sponge
Titanium and sponge zirconium carry out alloying ingredient, after mixing it is in bulk enter furnace, followed by cold crucible vacuum levitation melting (CCLM)
Technology carries out alloy melting.400MPa high-purity argon gas is passed through in fusion process, induced current is 350~400A, and power frequency is
20~25KHz continues to keep 3min after alloy is completely melt.To ensure that ingredient is uniform, alloy is through 3 meltings, second and third time
Ingot casting overturns shove charge end to end when melting, obtains ingot casting, carries out cogging forging and height after then cutting off riser to Φ 120mm ingot casting
Warm forging is made.Cogging temperature is 1020~1050 DEG C, soaking time 90min, and deflection is not less than 60%.High temperature forging temperature is
930~950 DEG C, deflection is not less than 50%, the final sheet alloy obtained with a thickness of 20mm.
Embodiment 1
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is by following weight percent at being grouped as: 5~5.1% Al, 4.06~
4.15% Zr, 9.8%~10% Mo, 3.03~3.15% Cr, surplus are Ti and inevitable impurity element.
Ti-32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al titanium sponge and sponge zirconium are pressed according to above-mentioned design ingredient
Be uniformly mixed according to proportion and it is in bulk enter furnace, then carry out CCLM melting, be passed through 400MPa high-purity argon gas, induced electricity in fusion process
Stream is 350~400A, and power frequency is 20~25KHz, continues to keep 3min after alloy is completely melt.To ensure that ingredient is equal
Even, alloy is through 3 meltings, and ingot casting overturns shove charge end to end when second and third secondary melting.It is surveyed using ICP-AES and elemental analyser
Alloying component and impurity content are measured, as shown in table 1.Alloy phase change point is measured using metallographic method and DSC differential thermal analysis, so that it is determined that
Alloy hot-working and heat treatment process；Cogging forging and high temperature forging then are carried out to Φ 120mm ingot casting, obtain with a thickness of
The Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate of 20mm.Wherein, cogging temperature is 1050 DEG C, soaking time 90min, deformation
Amount is not less than 60%；High temperature forging temperature is 950 DEG C, and deflection is not less than 50%.
1 technic metal ingredient (wt%) of table
To the Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate obtained above with a thickness of 20mm, carried out at 790 DEG C of two-phase section
3h solution treatment, water quenching to room temperature, then in 600 DEG C of progress, 8 hours timeliness.
The tissue of acquisition is as shown in Figure 1, since alloy final forging temperature, solid solution reason temperature are respectively positioned on transformation temperature hereinafter, tissue
Middle typical isometric α phase occur, size is about 2~3 μm.In addition, there is about 0.3 μm of thickness of sheet α phase to generate in alloy, alloy
Small and dispersed lenticular α phase is formed in 600 DEG C of timeliness.Such composite construction, which makes alloy not only, to be had the intensity of superelevation but also has
There is excellent plasticity.
Fig. 2 is 790 DEG C/3h of alloy solid solution, stresses typical-strain curve after 600 DEG C/8h timeliness.According to GB/
T228.1-2010 standard requirements, it is as follows to measure alloy mechanical property: tensile strength RmIt is 1518.3, yield strength Rp0.2For
1480.5MPa, elongation after fracture A are 11.2%.
Micropore is distributed in shaft-like, the inside such as Fig. 3 shows the dimple appearance on Alloy Fracture, and dimple is in substantially, is allusion quotation
The ductile fracture fracture of type
Embodiment 2
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is by following weight percent at being grouped as: 5~5.1% Al, 4.06~
4.15% Zr, 9.8%~10% Mo, 3.03~3.15% Cr, surplus are Ti and inevitable impurity element.
Ti-32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al titanium sponge and sponge zirconium are pressed according to above-mentioned design ingredient
Be uniformly mixed according to proportion and it is in bulk enter furnace, then carry out CCLM melting, be passed through 400MPa high-purity argon gas, induced electricity in fusion process
Stream is 350~400A, and power frequency is 20~25KHz, continues to keep 3min after alloy is completely melt.To ensure that ingredient is equal
Even, alloy is through 3 meltings, and ingot casting overturns shove charge end to end when second and third secondary melting.It is surveyed using ICP-AES and elemental analyser
Alloying component and impurity content are measured, as shown in table 1.Alloy phase change point is measured using metallographic method and DSC differential thermal analysis, so that it is determined that
Alloy hot-working and heat treatment process；Cogging forging and high temperature forging then are carried out to Φ 120mm ingot casting, obtain with a thickness of
The Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate of 20mm.Wherein, cogging temperature is 1050 DEG C, soaking time 90min, deformation
Amount is not less than 60%；High temperature forging temperature is 950 DEG C, and deflection is not less than 50%.
BASCA heat treatment is carried out to sheet alloy obtained above, first at the progress 40min solid solution of 875 DEG C of monophase field
Reason, then slowly cools to 580 DEG C with 3 DEG C/min cooling rate, and keep the temperature 6h.Due to the cooling rate that above-mentioned technique is slower, β crystal boundary
Place forms apparent grain boundary α phase, transgranular to form a large amount of α synusia, between coarse alpha lamella Dispersed precipitate tiny secondary α phase, such as
Shown in Fig. 4.It is such to organize general fracture toughness with higher, due to the presence of the secondary α phase of disperse, also there is high intensity.According to
According to GB/T228.1-2010 standard requirements, it is as follows to measure alloy mechanical property: tensile strength RmIt is 1540.6, yield strength Rp0.2
It is 6.4% for 1458.2MPa, elongation after fracture A.Fig. 5 shows the dimple appearance on Alloy Fracture, and dimple is in isometric substantially
Micropore is distributed in shape, inside, is ductile fracture fracture.
Embodiment 3
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is by following weight percent at being grouped as: 4.5~5% Al, 3.5~
4% Zr, 9.5%~9.7% Mo, 2.5~3% Cr, surplus are Ti and inevitable impurity element.
Ti-32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al titanium sponge and sponge zirconium are pressed according to above-mentioned design ingredient
Be uniformly mixed according to proportion and it is in bulk enter furnace, then carry out CCLM melting, be passed through 400MPa high-purity argon gas, induced electricity in fusion process
Stream is 350A, power frequency 20KHz, continues to keep 3min after alloy is completely melt, cooling, obtains ingot casting.To ensure into
Point uniformly, alloy is through 3 meltings, and ingot casting overturns shove charge end to end when second and third secondary melting, obtains Φ 120mm ingot casting.Then to Φ
120mm ingot casting carries out cogging forging and high temperature forging, obtains the Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate with a thickness of 20mm
Material.Wherein, cogging temperature is 1020 DEG C, soaking time 90min, and deflection is not less than 60%；High temperature forging temperature is 950
DEG C, deflection is not less than 50%.
To the Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate obtained above with a thickness of 20mm, carried out at 780 DEG C of two-phase section
3h solution treatment, water quenching to room temperature, then in 580 DEG C of progress, 8 hours timeliness.
Embodiment 4
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is by following weight percent at being grouped as: 5.3~5.5% Al, and 4.3
~4.5% Zr, 10%~10.5% Mo, 3.3~3.5% Cr, surplus are Ti and inevitable impurity element.
Ti-32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al titanium sponge and sponge zirconium are pressed according to above-mentioned design ingredient
Be uniformly mixed according to proportion and it is in bulk enter furnace, then carry out CCLM melting, be passed through 400MPa high-purity argon gas, induced electricity in fusion process
Stream is 400A, power frequency 25KHz, continues to keep 4min after alloy is completely melt, cooling, obtains ingot casting.To ensure into
Point uniformly, alloy is through 3 meltings, and ingot casting overturns shove charge end to end when second and third secondary melting, obtains Φ 120mm ingot casting.Then to Φ
120mm ingot casting carries out cogging forging and high temperature forging, obtains the Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate with a thickness of 20mm
Material.Wherein, cogging temperature is 1030 DEG C, soaking time 90min, and deflection is not less than 60%；High temperature forging temperature is 940
DEG C, deflection is not less than 50%.
To the Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate obtained above with a thickness of 20mm, carried out at 800 DEG C of two-phase section
3h solution treatment, water quenching to room temperature, then in 590 DEG C of progress, 8 hours timeliness.
Embodiment 5
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is subjected to solution treatment, then carries out ageing treatment；Wherein, Ti-Al-Zr-
Mo-Cr system beta-titanium alloy by weight percentage, including 4.5~4.8% Al, 3.6~3.8% Zr, 9.8~9.9% Mo
And 2.5~2.8% Cr, surplus be Ti and inevitable impurity element.
Ti-32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al titanium sponge and sponge zirconium are pressed according to above-mentioned design ingredient
Be uniformly mixed according to proportion and it is in bulk enter furnace, then carry out CCLM melting, be passed through 400MPa high-purity argon gas, induced electricity in fusion process
Stream is 360A, power frequency 22KHz, continues cooling after holding 5min after alloy is completely melt.To ensure that ingredient is uniform, close
Gold is through 3 meltings, and ingot casting overturns shove charge end to end when second and third secondary melting, obtains Φ 120mm ingot casting.Then Φ 120mm is cast
Ingot carries out cogging forging and high temperature forging, obtains the Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate with a thickness of 20mm.Wherein,
Cogging temperature is 1040 DEG C, soaking time 90min, and deflection is not less than 60%；High temperature forging temperature is 930 DEG C, deflection
Not less than 50%.
BASCA heat treatment is carried out to sheet alloy obtained above, first at the progress 45min solid solution of 865 DEG C of monophase field
Reason, then slowly cools to 590 DEG C with 4 DEG C/min cooling rate, and keep the temperature 8h.
Embodiment 6
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is subjected to solution treatment, then carries out ageing treatment；Wherein, Ti-Al-Zr-
Mo-Cr system beta-titanium alloy by weight percentage, the Mo including 5~5.2% Al, 4~4.1% Zr, 10.3~10.5% with
And 3~3.2% Cr, surplus be Ti and inevitable impurity element.
Ti-32Mo, Al-62Mo intermediate alloy, pure Cr, pure Al titanium sponge and sponge zirconium are pressed according to above-mentioned design ingredient
Be uniformly mixed according to proportion and it is in bulk enter furnace, then carry out CCLM melting, be passed through 400MPa high-purity argon gas, induced electricity in fusion process
Stream is 380A, power frequency 21KHz, continues cooling after holding 3min after alloy is completely melt.To ensure that ingredient is uniform, close
Gold is through 3 meltings, and ingot casting overturns shove charge end to end when second and third secondary melting, obtains Φ 120mm ingot casting.Then Φ 120mm is cast
Ingot carries out cogging forging and high temperature forging, obtains the Ti-Al-Zr-Mo-Cr system beta-titanium alloy plate with a thickness of 20mm.Wherein,
Cogging temperature is 1050 DEG C, soaking time 90min, and deflection is not less than 60%；High temperature forging temperature is 930 DEG C, deflection
Not less than 50%.
BASCA heat treatment is carried out to sheet alloy obtained above, first at the progress 50min solid solution of 885 DEG C of monophase field
Reason, then slowly cools to 600 DEG C with 5 DEG C/min cooling rate, and keep the temperature 6h.
The intensity that alloy of the present invention can get superelevation after melting, forging and strenthen-toughening mechanizm has both modeling simultaneously
Property.Room temperature tensile intensity RmIt is 1518.3, yield strength Rp0.2It is 11.2% for 1480.5MPa, elongation after fracture A.The present invention closes
Gold joined a certain amount of neutral element Zr again while Al is added, so that α phase obtains further reinforcing；High quality percentage
The addition of Mo element is to strengthen β matrix.In addition, can also reduce alloy due to the low diffusion rate of Mo and be forged in two-phase section
When temperature sensitivity, expand alloy process window.
Claims (5)
1. a kind of heat treatment process of superhigh intensity Ti-Al-Zr-Mo-Cr system beta-titanium alloy, which is characterized in that the Ti-Al-Zr-
Mo-Cr system beta-titanium alloy by weight percentage, including 4.5~5.5% Al, 3.5~4.5% Zr, 9.5~10.5%
The Cr of Mo and 2.5~3.5%, surplus are Ti and inevitable impurity element；
Ti-Al-Zr-Mo-Cr system beta-titanium alloy is subjected to solution treatment, then carries out ageing treatment；
Solution treatment is carried out, then carries out the detailed process of ageing treatment are as follows: in 780~800 DEG C of progress 3h solution treatment of two-phase section,
Water quenching is to room temperature, then in 580~600 DEG C of progress, 8 hours timeliness；
Or solution treatment is carried out, then carry out the detailed process of ageing treatment are as follows: first in the progress 40 of 865~885 DEG C of monophase field
~45min solution treatment then slowly cools to 580~600 DEG C with 3~5 DEG C/min cooling rate, and keeps the temperature 6~8h.
2. a kind of heat treatment process of superhigh intensity Ti-Al-Zr-Mo-Cr system according to claim 1 beta-titanium alloy, special
Sign is that Ti-Al-Zr-Mo-Cr system beta-titanium alloy is made by the following method: selecting corresponding raw material, suspends using cold crucible
Method of smelting enters furnace and to carry out multiple smelting in suspension and obtain ingot casting by raw material is in bulk, and ingot casting carries out after stripping off the skin and cutting riser
Cogging forging, high temperature forging and heat treatment after forging obtain Ti-Al-Zr-Mo-Cr system beta-titanium alloy.
3. a kind of heat treatment process of superhigh intensity Ti-Al-Zr-Mo-Cr system according to claim 2 beta-titanium alloy, special
Sign is that Ti-Al-Zr-Mo-Cr system beta-titanium alloy is made by the following method: by Ti-32Mo, Al-62Mo intermediate alloy, pure
Cr, pure Al and titanium sponge, sponge zirconium according to the proportion be uniformly mixed and it is in bulk enter furnace, then carry out cold crucible levitation melting, melt
Argon gas is passed through during refining, induced current is 350~400A, and power frequency is 20~25KHz, is continued after alloy is completely melt
3~5min is kept, it is cooling to obtain ingot casting, then cogging forging and high temperature forging are carried out to ingot casting, obtain Ti-Al-Zr-Mo-Cr
It is beta-titanium alloy.
4. a kind of heat treatment process of superhigh intensity Ti-Al-Zr-Mo-Cr system according to claim 3 beta-titanium alloy, special
Sign is that the cogging temperature of cogging forging is 1020~1050 DEG C, soaking time 90min, and deflection is not less than 60%.
5. a kind of heat treatment process of superhigh intensity Ti-Al-Zr-Mo-Cr system according to claim 4 beta-titanium alloy, special
Sign is that the temperature of high temperature forging is 930~950 DEG C, and deflection is not less than 50%.
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| CN110396656B (en) * | 2019-08-21 | 2021-02-05 | 太原理工大学 | Composite strengthening process of ultra-high strength TB8 titanium alloy |
| CN111014527B (en) * | 2019-12-30 | 2021-05-14 | 西北工业大学 | Preparation method of TC18 titanium alloy small-size bar |
| CN111394616B (en) * | 2020-04-26 | 2021-10-08 | 西安交通大学 | Preparation method of Ti-Al-Zr-Cr martensite titanium alloy |
| CN112126875B (en) * | 2020-08-27 | 2021-07-13 | 西安交通大学 | Multi-level heterostructure dual-phase alloy and hot rolling method thereof |
| CN112662971B (en) * | 2020-10-28 | 2022-05-20 | 西安交通大学 | High-strength TWIP titanium alloy with gradient structure and hot rolling method thereof |
| CN112662912A (en) * | 2020-10-28 | 2021-04-16 | 西安交通大学 | Ti-V-Mo-Zr-Cr-Al series high-strength metastable beta titanium alloy and preparation method thereof |
| CN112941438B (en) * | 2021-01-26 | 2022-07-22 | 南京理工大学 | Heat treatment method for improving high-temperature strength of beta-gamma-TiAl alloy |
| CN113388754B (en) * | 2021-04-29 | 2022-12-09 | 西安交通大学 | High-strength Ti-Cr-Zr-Mo-Al series titanium alloy and preparation method thereof |
| CN113278849B (en) * | 2021-05-20 | 2022-12-06 | 西部超导材料科技股份有限公司 | Reinforced and toughened metastable beta titanium alloy and preparation method thereof |
| CN113462928A (en) * | 2021-06-29 | 2021-10-01 | 中南大学 | Low-cost high-strength near-beta-Ti alloy and preparation method thereof |
| CN114657417B (en) * | 2022-05-07 | 2022-12-23 | 北京航空航天大学 | High-strength plastic titanium alloy suitable for cold deformation processing and preparation method thereof |
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