CN107385371A - The processing method for obtaining the metastable beta titanium alloy of corynebacterium primary alpha phase tissue - Google Patents

The processing method for obtaining the metastable beta titanium alloy of corynebacterium primary alpha phase tissue Download PDF

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CN107385371A
CN107385371A CN201710672807.3A CN201710672807A CN107385371A CN 107385371 A CN107385371 A CN 107385371A CN 201710672807 A CN201710672807 A CN 201710672807A CN 107385371 A CN107385371 A CN 107385371A
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titanium alloy
beta titanium
processing
metastable beta
alpha phase
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CN201710672807.3A
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CN107385371B (en
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周伟
赵永庆
辛社伟
葛鹏
李倩
张思远
陈军
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西北有色金属研究院
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16Changing 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
    • C22F1/18High-melting or refractory metals or alloys based thereon
    • C22F1/183High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon

Abstract

The invention discloses a kind of processing method for the metastable beta titanium alloy for obtaining corynebacterium primary alpha phase tissue, this method is:First, it is (T in temperature by metastable beta titanium alloy forgingβ+ 30) DEG C~(Tβ+ 50) it is incubated under conditions of DEG C, is slowly cooled to room temperature after insulation;2nd, it is (T in temperature by the metastable beta titanium alloy forging after coolingβDEG C 30)~(TβDEG C 20) it is incubated under conditions of;3rd, hot-working is carried out to the metastable beta titanium alloy forging after insulation, is quickly cooled down after hot-working, obtain the metastable beta titanium alloy product with corynebacterium primary alpha phase tissue.Metastable beta titanium alloy product that the present invention obtains is transgranular to have corynebacterium primary alpha phase tissue, the advantages of this corynebacterium tissue combines lamellar structure and equiaxed structure, plasticity and toughness are improved while titanium alloy intensity is ensured, solves the problems, such as that metastable beta titanium alloy strength plastic toughness is difficult to matched well.

Description

The processing method for obtaining the metastable beta titanium alloy of corynebacterium primary alpha phase tissue

Technical field

The invention belongs to titanium alloy technical field of hot working, and in particular to a kind of Asia for obtaining corynebacterium primary alpha phase tissue The processing method of steady beta titanium alloy.

Background technology

In recent years, as the development of aerospace vehicle, the research and application of titanium and titanium alloy are constantly expanded.In titanium alloy In research field, the high tough metastable beta titanium alloy used as structural material is one of most important developing direction.Titanium alloy Microstructure determine its mechanical property, and its microstructure depends on chemical composition, hot-working history and heat Processing procedure.The alloy being had determined for chemical composition, to expect desired microstructure and mechanical property, can only just lead to Cross deformation and be heat-treated to reach.For metastable beta titanium alloy, alloy, which adds more beta stable element, has alloy There is higher beta stability, there can only be tiny isometric primary alpha phase tissue using transgranular after traditional (alpha+beta) phase region forging, come into being Increase and decrease occurs according to the height of forging temperature in α phases content, but phase morphology will not occur significantly to change.It is this tiny isometric As-forged microstructure is difficult to change its form and size by being heat-treated.

For the microscopic structure of general titanium alloy mainly by α phases and β phase compositions, wherein α phases are used as main hardening constituent, its pattern, Content and size have particularly important influence to the mechanical property of alloy.Tiny isometric α meets, and to have alloy higher strong Degree and excellent plasticity, but fracture toughness index is poor.

With raising of the people to aircraft requirements and the change of Flight Vehicle Design theory, the intensity of titanium alloy is not required nothing more than Level improves constantly, and it is also proposed higher requirement to the toughness of titanium alloy.Therefore, suitable heat processing technique is formulated, Regulate and control the microscopic features such as content and the size of different-shape α phases, bar is obtained the mechanics of intensity-plasticity-toughness matched well Performance, play an important roll in the production process of metastable beta titanium alloy.

The content of the invention

The technical problems to be solved by the invention are to be directed to above-mentioned the deficiencies in the prior art, there is provided one kind obtains stub The processing method of the metastable beta titanium alloy of shape primary alpha phase tissue.Metastable beta titanium alloy has stub made from the processing method Shape primary alpha phase tissue, the corynebacterium primary alpha phase tissue are transformed into mixing group after using (alpha+beta) phase region solid-solution and aging heat treatment Knit, the line and staff control includes corynebacterium primary alpha phase, tiny needle-like secondaryαphase and remaining β phases, wherein corynebacterium primary alpha phase pairing Golden plasticity, Toughness are larger, and the presence of tiny needle-like secondaryαphase has the raising beneficial to titanium alloy intensity, thus solves Asia The problem of steady beta titanium alloy intensity-plasticity-toughness is difficult to matched well.

In order to solve the above technical problems, the technical solution adopted by the present invention is:A kind of acquisition corynebacterium primary alpha phase tissue The processing method of metastable beta titanium alloy, it is characterised in that the processing method comprises the following steps:

Step 1: in temperature it is (T by metastable beta titanium alloy forgingβ+ 30) DEG C~(Tβ+ 50) protected under conditions of DEG C Temperature, then slowly cool to 25 DEG C of room temperatures;

Step 2: in temperature it is (T by the metastable beta titanium alloy forging that 25 DEG C of room temperatures are cooled in step 1β- 30) DEG C~ (Tβ- 20) it is incubated under conditions of DEG C;

Step 3: the heat that deflection is 60%~80% is carried out to the metastable beta titanium alloy forging after being incubated in step 2 Processing, is quickly cooled to less than 200 DEG C after hot-working, obtain having the metastable beta titanium alloy of corynebacterium primary alpha phase tissue to produce Product.

A kind of processing method of the metastable beta titanium alloy of above-mentioned acquisition corynebacterium primary alpha phase tissue, it is characterised in that The time t being incubated described in step 11=(D × 0.6+60) min, wherein D are that the section of the metastable beta titanium alloy forging is straight Footpath, D unit is mm.

A kind of processing method of the metastable beta titanium alloy of above-mentioned acquisition corynebacterium primary alpha phase tissue, it is characterised in that The speed cooled down described in step 1 is 0.05 DEG C/min~0.1 DEG C/min.

A kind of processing method of the metastable beta titanium alloy of above-mentioned acquisition corynebacterium primary alpha phase tissue, it is characterised in that The time t being incubated described in step 22=D × 0.6min, wherein D be the metastable beta titanium alloy forging diameter of section, D Unit be mm.

A kind of processing method of the metastable beta titanium alloy of above-mentioned acquisition corynebacterium primary alpha phase tissue, it is characterised in that Hot-working described in step 3 is jumping-up or the pulling of a fire time.

A kind of processing method of the metastable beta titanium alloy of above-mentioned acquisition corynebacterium primary alpha phase tissue, it is characterised in that The mode quickly cooled down described in step 3 is water cooling.

The present invention has advantages below compared with prior art:

1st, processing method of the invention is compared with Conventional processing methods, and alloy is before processing in advance in α/β knee pointy temperature TβSlow cooling handles and forms specific Widmannstatten structure coarse alpha lamellar structure after 30 DEG C~50 DEG C of the above is incubated, this Microscopic structure is in α/β knee pointy temperature Tβ20 DEG C below~30 DEG C (alpha+beta) phase region heats, Widmannstatten structure lamella in insulating process Passivation is gradually melted on α borders, then the α lamellas of passivation is cut into corynebacterium by heat processing technique, changes primary alpha phase Form, broken due to beta stability it is strong caused by after metastable beta titanium alloy (alpha+beta) phase region forging it is transgranular can only exist it is tiny etc. The traditional understanding of axle primary alpha phase tissue.

2nd, the Ti-1300 titanium alloy rod bars with corynebacterium primary alpha phase tissue that prepare of the present invention through solid solution aging it is hot at After reason, tensile strength is 1310~1350MPa, and elongation percentage 10%, fracture toughness is 62~66MPam1/2;It is prepared by the present invention The Ti-5553 titanium alloy cake materials with corynebacterium primary alpha phase tissue after solid-solution and aging heat treatment, tensile strength is 1250MPa, elongation percentage 11%, fracture toughness 67MPam1/2;Prepared by the present invention has corynebacterium primary alpha phase tissue TB6 titanium alloy cake materials are after solid-solution and aging heat treatment, tensile strength 1200MPa, elongation percentage 11%, and fracture toughness is 58MPa·m1/2;Ti-55531 titanium alloy rod bars with corynebacterium primary alpha phase tissue prepared by the present invention are through solid solution aging warm After processing, tensile strength 1230MPa, elongation percentage 12%, fracture toughness 64MPam1/2;Thus explanation is of the invention adds Metastable beta titanium alloy product with corynebacterium primary alpha phase tissue prepared by work method passes through (alpha+beta) phase region solid-solution and aging heat treatment Afterwards, make titanium alloy that there is excellent intensity-plasticity-toughness matching.

Technical scheme is described in further detail below by drawings and examples.

Brief description of the drawings

Fig. 1 is the microscopic structure of Ti-1300 titanium alloy forgings forging after step 1 Slow cooling in the embodiment of the present invention 1 Figure.

Fig. 2 be in the embodiment of the present invention 1 Ti-1300 titanium alloy forgings micro- group of obtained bar after step 3 water cooling Knit figure.

Fig. 3 is the obtained Ti-1300 titanium alloy rod bars with corynebacterium primary alpha phase tissue of the embodiment of the present invention 1 through solid Micro-organization chart after molten aging strengthening model.

Embodiment

Embodiment 1

The processing method of the present embodiment is:

Step 1: Ф 200mm × 600mm Ti-1300 titanium alloy forgings are incubated in 860 DEG C of electric furnace, protect The warm time is 180min, and Ti-1300 titanium alloy forgings are cooled into 25 DEG C of rooms with 0.05 DEG C/min cooling velocity after the completion of insulation Temperature;

Step 2: the Ti-1300 titanium alloy forgings that room temperature is cooled in step 1 are protected in 810 DEG C of electric furnace Temperature, soaking time 120min;

Step 3: the pulling of a fire time is carried out to the Ti-1300 titanium alloy forgings after being incubated in step 2, it is quick after pulling Water cooling obtains Ф 40mm × 15000mm Ti-1300 titanium alloy rod bars to 180 DEG C;The fire of Ti-1300 titanium alloy forgings one pulls out Long total deflection is 80%.

Fig. 1 is the micro-organization chart of Ti-1300 titanium alloy forgings forging after step 1 Slow cooling in the present embodiment, from It can be seen from the figure that has obtained the thick lamella α phases of typical Widmannstatten structure after step 1 isothermal holding and Slow cooling, thick Lamella α phase constitutions have higher Crack Extension impedance, and fracture toughness is high, but plasticity is poor.Fig. 2 is Ti-1300 in the present embodiment The micro-organization chart of titanium alloy forging obtained bar after step 3 water cooling, as can be seen from the figure lamella α phase boundrays passivation And corynebacterium is cut into, the raising having beneficial to alloy plasticity and toughness of corynebacterium primary alpha phase, sheet can either be played The performance advantage of tissue makes alloy have higher toughness, turn avoid the defects of plasticity is relatively low.

To made from the present embodiment have corynebacterium primary alpha phase tissue Ti-1300 titanium alloy rod bars carry out 790 DEG C × 1h/AC+570 DEG C × 4h/AC solid-solution and aging heat treatment, Fig. 3, which is that the present embodiment is obtained, has corynebacterium primary alpha phase tissue Micro-organization chart of the Ti-1300 titanium alloy rod bars after solid-solution and aging heat treatment, it is primary alpha phase wherein at a, is secondary α at b Phase, from figure 3, it can be seen that after solid-solution and aging heat treatment, Ti-1300 titanium alloy microstructures are by corynebacterium primary alpha phase tissue It is changed into line and staff control, the line and staff control includes corynebacterium primary alpha phase, tiny needle-like secondaryαphase and remaining β phases, wherein corynebacterium Primary alpha phase is larger to alloy plasticity, Toughness, and the presence of tiny needle-like secondaryαphase has the raising beneficial to titanium alloy intensity.

The conventional method of existing processing Ti-1300 titanium alloy rod bars is:Closed using Ф 200mm × 600mm Ti-1300 titaniums Bodkin part obtains Ф 40mm × 15000mm Ti-1300 titanium alloy rod bars in (alpha+beta) phase region after the pulling processing of a fire time, Deflection is 80%.

To Ti-1300 titanium alloy bars made from Ti-1300 titanium alloy rod bars made from the present embodiment and existing processing method Material carries out 790 DEG C × 1h/AC+570 DEG C × 4h/AC solid-solution and aging heat treatment, then surveys its mechanical property, as a result such as table 1 It is shown.

Mechanical property experimental results of the table 1Ti-1300 titanium alloy rod bars after solid-solution and aging heat treatment

Processing mode Tensile strength (MPa) Elongation percentage (%) Fracture toughness (MPam1/2) Embodiment 1 1350 10 62 Existing method 1370 10 45

As can be drawn from Table 1, the Ti- with corynebacterium primary alpha phase tissue obtained using the present embodiment processing method While mechanical property of 1300 titanium alloy rod bars after (alpha+beta) phase region solid-solution and aging heat treatment is in proof strength significantly The toughness of alloy is improved, makes Ti-1300 titanium alloys that there is excellent intensity-plasticity-toughness matching.

Embodiment 2

The processing method of the present embodiment is:

Step 1: Ф 200mm × 500mm Ti-5553 titanium alloy forgings are incubated in 875 DEG C of electric furnace, protect The warm time is 180min, and Ti-5553 titanium alloy forgings are cooled into 25 DEG C of rooms with 0.07 DEG C/min cooling velocity after the completion of insulation Temperature;

Step 2: the Ti-5553 titanium alloy forgings that room temperature is cooled in step 1 are protected in 815 DEG C of electric furnace Temperature, soaking time 120min;

Step 3: the jumping-up of a fire time is carried out to the Ti-5553 titanium alloy forgings after being incubated in step 2, it is quick after jumping-up Water cooling obtains Ф 500mm × 80mm Ti-5553 titanium alloy cake materials to 190 DEG C;The fire time jumping-up of Ti-5553 titanium alloy forgings one Total deformation be 60%.

By light microscope to obtained in the present embodiment through step 3 jumping-up micro- group of Ti-5553 titanium alloy cake materials Knit and observed, found in the microscopic structure and embodiment 1 of Ti-5553 titanium alloy cake materials made from the present embodiment through step 3 The structure goodness of fit of the microscopic structure obtained after pulling processing is higher, and this explanation the present embodiment, which has been made, has corynebacterium primary α The Ti-5553 titanium alloy cake materials of phase constitution.

The conventional method of existing processing Ti-5553 titanium alloy cake materials is:Closed using Ф 200mm × 500mm Ti-5553 titaniums Bodkin part obtains Ф 500mm × 80mm Ti-5553 titanium alloy cake materials in (alpha+beta) phase region after the jumping-up processing of a fire time, becomes Shape amount is 60%.

To Ti-5553 titanium alloy cakes made from Ti-5553 titanium alloys cake material made from the present embodiment and existing processing method Material carries out 800 DEG C × 1h/AC+580 DEG C × 4h/AC solid-solution and aging heat treatment, then surveys its mechanical property, as a result such as table 2 It is shown.

Mechanical property experimental results of the table 2Ti-5553 titanium alloy cake materials after solid-solution and aging heat treatment

Processing mode Tensile strength (MPa) Elongation percentage (%) Fracture toughness (MPam1/2) Embodiment 2 1250 11 67 Existing method 1300 9 43

As can be drawn from Table 2, the Ti- with corynebacterium primary alpha phase tissue obtained using the present embodiment processing method Mechanical property of the 5553 titanium alloy cake materials after (alpha+beta) phase region solid-solution and aging heat treatment improves while alloy strength is ensured Toughness and elongation percentage, make Ti-5553 titanium alloy cake materials that there is excellent intensity-plasticity-toughness matching.

Embodiment 3

The processing method of the present embodiment is:

Step 1: Ф 150mm × 320mm TB6 titanium alloy forgings are incubated in 850 DEG C of electric furnace, during insulation Between be 150min, TB6 titanium alloy forgings are cooled to 25 DEG C of room temperatures with 0.09 DEG C/min cooling velocity after the completion of insulation;

Step 2: the TB6 titanium alloy forgings that room temperature is cooled in step 1 are incubated in 790 DEG C of electric furnace, protect The warm time is 90min;

Step 3: the jumping-up of a fire time is carried out to the TB6 titanium alloy forgings after being incubated in step 2, quick water cooling after jumping-up To 170 DEG C, Ф 500mm × 28.8mm TB6 titanium alloy cake materials are obtained;The total deformation of the fire time jumping-up of TB6 titanium alloy forgings one For 70%.

The microscopic structure of the TB6 titanium alloy cake materials obtained by light microscope to the present embodiment through step 3 jumping-up is carried out Observation, find the microscopic structure of TB6 titanium alloy cake materials made from the present embodiment with embodiment 1 after step 3 pulling processing The structure goodness of fit of obtained microscopic structure is higher, and the TB6 with corynebacterium primary alpha phase tissue has been made in this explanation the present embodiment Titanium alloy cake material.

The conventional method of existing processing TB6 titanium alloy cake materials is:Existed using Ф 150mm × 320mm TB6 titanium alloy forgings (alpha+beta) phase region obtains Ф 500mm × 28.8mm TB6 titanium alloy cake materials, deflection 80% after the jumping-up processing of a fire time.

TB6 titanium alloy cakes material made from TB6 titanium alloys cake material made from the present embodiment and existing processing method is carried out 760 DEG C × 1h/AC+560 DEG C × 6h/AC solid-solution and aging heat treatment, its mechanical property is then surveyed, as a result as shown in table 3.

Mechanical property experimental results of the table 3TB6 titanium alloy cake materials after solid-solution and aging heat treatment

Processing mode Tensile strength (MPa) Elongation percentage (%) Fracture toughness (MPam1/2) Embodiment 3 1200 11 58 Existing method 1210 9 41

As can be drawn from Table 3, the TB6 titaniums with corynebacterium primary alpha phase tissue obtained using the present embodiment processing method Mechanical property of the alloy cake material after (alpha+beta) phase region solid-solution and aging heat treatment improves toughness while alloy strength is ensured And elongation percentage, make TB6 titanium alloy cake materials that there is excellent intensity-plasticity-toughness matching.

Embodiment 4

The processing method of the present embodiment is:

Step 1: Ф 150mm × 400mm Ti-55531 titanium alloy forgings are incubated in 890 DEG C of electric furnace, protect The warm time is 150min, and Ti-55531 titanium alloy forgings are cooled into 25 DEG C of rooms with 0.1 DEG C/min cooling velocity after the completion of insulation Temperature;

Step 2: the Ti-55531 titanium alloy forgings that 25 DEG C of room temperatures are cooled in step 1 are entered in 820 DEG C of electric furnace Row insulation, soaking time 90min;

Step 3: the pulling of a fire time is carried out to the Ti-55531 titanium alloy forgings after being incubated in step 2, it is fast after pulling Fast water cooling obtains Ф 30mm × 10000mm Ti-55531 titanium alloy rod bars to 180 DEG C;The fire of Ti-55531 titanium alloy forgings one The total deformation of secondary pulling is 80%.

Micro- group of the Ti-55531 titanium alloy rod bars for pulling out to obtain through step 3 to the present embodiment by light microscope Knit and observed, found in the microscopic structure and embodiment 1 of Ti-55531 titanium alloy rod bars made from the present embodiment through step The structure goodness of fit of microscopic structure obtained after three pullings processing is higher, and this illustrates that this implementation has been made and has corynebacterium primary α The Ti-55531 titanium alloy rod bars of phase constitution.

The conventional method of existing processing Ti-55531 titanium alloy rod bars is:Using Ф 150mm × 400mm Ti-55531 titaniums Alloy forged piece obtains Ф 30mm × 10000mm Ti-55531 titanium alloy bars in (alpha+beta) phase region after the pulling processing of a fire time Material, deflection 80%.

To Ti-55531 titanium alloys made from Ti-55531 titanium alloy rod bars made from the present embodiment and existing processing method Bar carries out 790 DEG C × 1h/AC+550 DEG C × 6h/AC solid-solution and aging heat treatment, then surveys its mechanical property, as a result such as table Shown in 4.

Mechanical property experimental results of the table 4Ti-55531 titanium alloy rod bars after solid-solution and aging heat treatment

Processing mode Tensile strength (MPa) Elongation percentage (%) Fracture toughness (MPam1/2) The present embodiment 1230 12 64 Existing method 1250 10 44

As can be drawn from Table 4, the Ti- with corynebacterium primary alpha phase tissue obtained using the present embodiment processing method Mechanical property of 55531 titanium alloy rod bars after (alpha+beta) phase region solid-solution and aging heat treatment carries while alloy strength is ensured High toughness and elongation percentage, make Ti-55531 titanium alloy rod bars have excellent intensity-plasticity-toughness matching.

Embodiment 5

The processing method of the present embodiment is:

Step 1: Ф 150mm × 600mm Ti-1300 titanium alloy forgings are incubated in 880 DEG C of electric furnace, protect The warm time is 150min, and Ti-1300 titanium alloy forgings are cooled into 25 DEG C of rooms with 0.06 DEG C/min cooling velocity after the completion of insulation Temperature;

Step 2: the Ti-1300 titanium alloy forgings that room temperature is cooled in step 1 are protected in 800 DEG C of electric furnace Temperature, soaking time 90min;

Step 3: the pulling of a fire time is carried out to the Ti-1300 titanium alloy forgings after being incubated in step 2, it is quick after pulling Water cooling obtains Ф 45mm × 6666.7mm Ti-1300 titanium alloy rod bars to 160 DEG C;The fire of Ti-1300 titanium alloy forgings one pulls out Long total deformation is 70%.

By light microscope to pull out to obtain through step 3 in the present embodiment micro- group of Ti-1300 titanium alloy rod bars Knit and observed, it is found that the microscopic structure of Ti-1300 titanium alloy rod bars made from the present embodiment is pulled out with embodiment 1 through step 3 The microstructure goodness of fit obtained after long processing is higher, and this explanation the present embodiment, which has been made, has corynebacterium primary alpha phase group The Ti-1300 titanium alloy rod bars knitted.

The conventional method of existing processing Ti-1300 titanium alloy rod bars is:Closed using Ф 150mm × 600mm Ti-1300 titaniums Bodkin part obtains Ф 45mm × 6667mm Ti-1300 titanium alloy rod bars, deformation in (alpha+beta) phase region after a fire time pulling processing Measure as 80%.

To Ti-1300 titanium alloy bars made from Ti-1300 titanium alloy rod bars made from the present embodiment and existing processing method Material carries out 760 DEG C × 1h/AC+550 DEG C × 6h/AC solid-solution and aging heat treatment, then surveys its mechanical property, as a result such as table 5 It is shown.

Mechanical property experimental results of the table 5Ti-1300 titanium alloy rod bars after solid-solution and aging heat treatment

Processing mode Tensile strength (MPa) Elongation percentage (%) Fracture toughness (MPam1/2) The present embodiment 1310 10 66 Existing method 1340 10 42

As can be drawn from Table 5, the Ti- with corynebacterium primary alpha phase tissue obtained using the present embodiment processing method Mechanical property of 1300 titanium alloy rod bars after (alpha+beta) phase region solid-solution and aging heat treatment while alloy strength is ensured significantly Improve fracture toughness degree, make Ti-1300 titanium alloy rod bars that there is excellent intensity-plasticity-toughness matching.

It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions.It is every according to invention skill Any simple modification, change and equivalence change that art is substantially made to above example, still fall within technical solution of the present invention Protection domain in.

Claims (6)

  1. A kind of 1. processing method for the metastable beta titanium alloy for obtaining corynebacterium primary alpha phase tissue, it is characterised in that this method bag Include following steps:
    Step 1: in temperature it is (T by metastable beta titanium alloy forgingβ+ 30) DEG C~(Tβ+ 50) it is incubated under conditions of DEG C, so After slowly cool to 25 DEG C of room temperatures;
    Step 2: in temperature it is (T by the metastable beta titanium alloy forging that 25 DEG C of room temperatures are cooled in step 1β- 30) DEG C~(Tβ- DEG C 20) it is incubated under conditions of;
    Step 3: the hot-working that deflection is 60%~80% is carried out to the metastable beta titanium alloy forging after being incubated in step 2, Less than 200 DEG C are quickly cooled to after hot-working, obtains the metastable beta titanium alloy product with corynebacterium primary alpha phase tissue.
  2. 2. a kind of processing method of metastable beta titanium alloy for obtaining corynebacterium primary alpha phase tissue according to claim 1, Characterized in that, the time t being incubated described in step 11=(D × 0.6+60) min, wherein D are the metastable beta titanium alloy The diameter of section of forging, D unit is mm.
  3. 3. a kind of processing method of metastable beta titanium alloy for obtaining corynebacterium primary alpha phase tissue according to claim 1, Characterized in that, the speed cooled down described in step 1 is 0.05 DEG C/min~0.1 DEG C/min.
  4. 4. a kind of processing method of metastable beta titanium alloy for obtaining corynebacterium primary alpha phase tissue according to claim 1, Characterized in that, the time t being incubated described in step 22=D × 0.6min, wherein, D is the metastable beta titanium alloy forging Diameter of section, D unit is mm.
  5. 5. a kind of processing method of metastable beta titanium alloy for obtaining corynebacterium primary alpha phase tissue according to claim 1, Characterized in that, hot-working described in step 3 is jumping-up or the pulling of a fire time.
  6. 6. a kind of processing method of metastable beta titanium alloy for obtaining corynebacterium primary alpha phase tissue according to claim 1, Characterized in that, the mode quickly cooled down described in step 3 is water cooling.
CN201710672807.3A 2017-08-08 2017-08-08 The processing method for obtaining the metastable beta titanium alloy of corynebacterium primary alpha phase tissue CN107385371B (en)

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CN108559935B (en) * 2018-07-05 2019-12-06 长沙理工大学 Rapid composite heat treatment process for improving mechanical property of titanium alloy
CN110396656A (en) * 2019-08-21 2019-11-01 太原理工大学 A kind of composite reinforcement process of superhigh intensity TB8 titanium alloy

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