CN108893691A - A kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method - Google Patents
A kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method Download PDFInfo
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Abstract
The invention belongs to titanium alloy wire materials preparation technical fields, and in particular to a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method.This method is：By Φ 40mm~Φ 45mm × 800mm~1200mm specification TB6 titanium alloy rod bar, the great-deformation hot-rolled bar to Φ 9mm~Φ 10mm specification of multi-pass is carried out first, then pass through cold rolling after monophase field solution treatment, control cold rolling total deformation 15%~36%, the silk material of Φ 6mm~Φ 7mm specification is obtained, silk material is most afterwards through 520 DEG C~560 DEG C ageing treatments.Simple using the method for the present invention processing parameter setting, easy to operate, process controllability is strong, silk material aging state room temperature tensile intensity σb>=1050MPa, yield strength σ0.2>=1000MPa, elongation percentage δ5>=15%, contraction percentage of area ψ >=50%, and lot stability is high, it is reproducible.
Description
Technical field
The invention belongs to titanium alloy wire materials preparation technical fields, and in particular to a kind of High-strength high-plasticity TB6 titanium alloy wire materials
Structure property uniformity control method.
Background technique
At present, high-strength titanium alloy becomes one of the Main way of titanium alloy development, such alloy is as a kind of structural material
It is widely used in aircraft and helicopter manufacture.High-strength titanium alloy is usually that thermally treated intensity reaches 1000MPa's or more
Titanium alloy generally comprises alpha+beta diphasic titanium alloy and beta titanium alloy, and wherein beta titanium alloy not only has good cold and hot working
Can, it easily forges, can roll, weld, higher mechanical property and good can be also obtained by subsequent solid solution+aging thermal treating process
Many advantages, such as matching of good intensity and fracture toughness.TB6 titanium alloy name chemical component is Ti-10V-2Fe-3Al, is allusion quotation
The near β type titanium alloys of type, with specific strength is high, fracture toughness is good, anisotropy is small, forging temperature is low and stress corrosion resistant ability
The series of advantages such as strong.TB6 titanium alloy is widely used to the crucial load such as American-European fighter plane, helicopter, civil aircraft portion
Position, as F22 arrester hook connector, B-1B bomber structural member, 2000 aircraft connector of phantom, B-777 main landing gear bogie beam,
NH90 and the propeller hub center piece of Apache's helicopter etc..TB6 titanium alloy has been used for destroying seven aircraft plate-girders and destroys eight in China
58 frame abdomeinal fin connector of aircraft.TB6 titanium alloy compares TC4 titanium alloy, can significantly improve the fatigue strength of product.When using TB6 titanium
Alloy replaces TC4 titanium alloy to can reduce construction weight about 20%, and the 30CrMnSiA of equality strength level is replaced with TB6 titanium alloy
When equal structural steel, construction weight about 40% can reduce.
TB6 titanium alloy is as near β type titanium alloys, and when being quickly cooled down after soak, part β, which meets, occurs β → ω
Transformation forms quenching ω phase.It is low to quench ω phase intensity height, plasticity, belongs to hard crisp phase, although the ω phase of small and dispersed can play
Strengthen the effect of matrix, but the appearance of ω phase is also easy to cause the plasticity of alloy to drastically reduce, when ω phase content reaches in alloy
The plasticity of alloy can almost be down to zero or so when to 5% or more.Therefore, because the Phase Transformation Characteristic of TB6 titanium alloy itself, usually
Silk material is prepared by the way of cold rolling after multistage hot deformation or multi-pass annealing, since there are oxygen on surface after multistage hot deformation
Change skin, needs to remove surface scale by Centreless lathe before use, and will be by before rolling before each cold rolling when multi-pass cold rolling
Heat treatment, technique is cumbersome, inefficient.
Summary of the invention
The purpose of the present invention is to propose to a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method,
This approach includes the following steps：
Step 1: electric furnace is heated to (T β+20) DEG C~(T β+40) DEG C, to temperature after be packed into Φ 40mm~Φ 45mm ×
The TB6 titanium alloy rod bar of 800mm~1200mm specification, by the diameter calculation soaking time of bar, soaking time 0.4min/mm
Then~0.6min/mm carries out multistage hot deformation to the bar of Φ 9mm~Φ 10mm specification, controls hot rolling deformation per pass
Amount is 40%~50%, air-cooled to arrive room temperature, obtains bar, then bar is cut scale by 4000mm long；
Step 2: electric furnace is heated to (Tβ+ 20) DEG C~(Tβ+ 40) DEG C, to being packed into bar obtained in step 1 after temperature,
Every furnace bar quantity control keeps the temperature 30min after stove arrives temperature again, is straightened, is then cooled to room temperature at 8~10；
Step 3: bar obtained in step 2 to be added to Φ 7.5mm~Φ 8mm with Centreless lathe machine, then be cold rolled to
Φ 6mm~Φ 7mm controls total deformation 15%~36%, obtains silk material；
Step 4: electric furnace is heated to 520 DEG C~560 DEG C, it is packed into silk material obtained in step 3 after arriving temperature, to stove weight
It is air-cooled to arrive room temperature newly to soaking time 30min~60min after temperature.
Electric furnace is heated to (T in the step 1β+ 25) DEG C~(Tβ+35)℃。
Electric furnace is heated to (T in the step 1β+30)℃。
Electric furnace is heated to (T in the step 2β+ 25) DEG C~(Tβ+35)℃。
Electric furnace is heated to (T in the step 2β+30)℃。
The control of cold rolling total deformation is 20%~30% in the step 3.
The control of cold rolling total deformation is 25% in the step 3.
Electric furnace is heated to 530 DEG C~550 DEG C in the step 4.
Electric furnace is heated to 535 DEG C~545 DEG C in the step 4.
Electric furnace is heated to 540 DEG C in the step 4.
The present invention has the advantage that and beneficial effect：
The present invention is directed to nearly β type TB6 titanium alloy Phase Transformation Characteristic, and monophase field high temperature β once pre-processes before cold rolling is carried out to it,
The preparation process of TB6 titanium alloy wire materials is optimized in combination with an aging strengthening model after cold rolling by control cold rolling reduction
Parameter obtains the TB6 titanium alloy wire materials of the High-strength high-plasticity of Φ 6mm~Φ 7mm specification.
The present invention is by the monophase field high temperature β pretreatment temperature before strict control TB6 titanium alloy hot-rolled temperature and cold rolling, rationally
A large amount of precipitations of the ω phase inside TB6 titanium alloy are inhibited, only need to improve cold-rolling deformation energy using primary pretreatment before cold rolling
Power.Meanwhile a low-temperature short-time ageing treatment is used after cold rolling, by controlling precipitation content, pattern and the size of secondaryαphase,
Obtain Φ 6mm~Φ 7mm specification TB6 titanium alloy wire materials that mechanical properties are high, plasticity is good.The technique has technological parameter
Simply, high production efficiency, feature at low cost not only reduce production cycle and production cost, and simple to operate, work
Skill controllability is stronger.
The silk material prepared using the invention, lot stability is high, and surface quality is good, and dimensional accuracy is high, and structure property is uniform.
Silk material is after timeliness, room temperature tensile intensity σb>=1050MPa, yield strength σ0.2>=1000MPa, elongation percentage δ5>=15%, section
Shrinking percentage ψ >=50%.
Specific embodiment
Step 1: electric furnace is heated to (Tβ+ 20) DEG C~(Tβ+ 40) DEG C, to be packed into after temperature Φ 40mm~Φ 45mm ×
The TB6 titanium alloy rod bar of 800mm~1200mm specification, by the diameter calculation soaking time of bar, soaking time 0.4min/mm
Then~0.6min/mm carries out multistage hot deformation to the bar of Φ 9mm~Φ 10mm specification, controls hot rolling deformation per pass
Amount 40%~50%, it is air-cooled to arrive room temperature, bar is obtained, then bar is cut into scale by 4000mm long；
Step 2: electric furnace is heated to (Tβ+ 20) DEG C~(Tβ+ 40) DEG C, to being packed into bar obtained in step 1 after temperature,
Every furnace bar quantity control keeps the temperature 30min after stove arrives temperature again, is straightened, is then cooled to room temperature at 8~10；
Step 3: the bar that step 2 is obtained, is added to Φ 7.5mm~Φ 8mm with Centreless lathe machine, is then cold rolled to Φ
6mm~Φ 7mm controls total deformation 15%~36%, obtains silk material；
Step 4: electric furnace is heated to 520 DEG C~560 DEG C, silk material obtained in step 3, soaking time are packed into after arriving temperature
30min~60min, it is air-cooled to arrive room temperature.
See Table 1 for details for the specific step of preparation process of TB6 titanium alloy wire materials and technological parameter.
1 silk material step of preparation process of table and technological parameter
Embodiment 1
TB6 titanium alloy rod bar (Φ 40mm × 1200mm) specific process step and technological parameter are shown in Table 2, the silk material after cold rolling
Performance after timeliness is shown in Table 3.
The processing step and technological parameter (T of 2 embodiment 1 of tableβ=795 DEG C)
Room temperature tensile properties after the silk material timeliness of 3 embodiment 1 of table
| Serial number | σb(MPa) | σ0.2(MPa) | δ5(%) | ψ (%) |
| 1 | 1100 | 1040 | 16.8 | 62.4 |
| 2 | 1090 | 1035 | 17.2 | 65.0 |
| 3 | 1110 | 1055 | 16.5 | 60.0 |
Embodiment 2
TB6 titanium alloy rod bar (Φ 42mm × 800mm) specific process step and technological parameter are shown in Table 4, the silk material after cold rolling
Performance after timeliness is shown in Table 5.
The processing step and technological parameter (T of 4 embodiment 2 of tableβ=802 DEG C)
Room temperature tensile properties after the silk material timeliness of 5 embodiment 2 of table
| Serial number | σb(MPa) | σ0.2(MPa) | δ5(%) | ψ (%) |
| 1 | 1080 | 1040 | 17.0 | 65.5 |
| 2 | 1120 | 1067 | 16.6 | 58.6 |
| 3 | 1100 | 1060 | 17.5 | 68.0 |
Embodiment 3
TB6 titanium alloy rod bar (Φ 45mm × 1000mm) specific process step and technological parameter are shown in Table 6, the silk material after cold rolling
Performance after timeliness is shown in Table 7.
The processing step and technological parameter (T of 6 embodiment 3 of tableβ=793 DEG C)
Room temperature tensile properties after the silk material timeliness of 7 embodiment 3 of table
| Serial number | σb(MPa) | σ0.2(MPa) | δ5(%) | ψ (%) |
| 1 | 1095 | 1055 | 17.0 | 65.5 |
| 2 | 1120 | 1067 | 16.6 | 58.6 |
| 3 | 1100 | 1060 | 17.5 | 68.0 |
Embodiment 4
TB6 titanium alloy rod bar (Φ 42mm × 1100mm) specific process step and technological parameter are shown in Table 8, the silk material after cold rolling
Performance after timeliness is shown in Table 9.
The processing step and technological parameter (T of 8 embodiment 4 of tableβ=807 DEG C)
Room temperature tensile properties after the silk material timeliness of 9 embodiment 4 of table
| Serial number | σb(MPa) | σ0.2(MPa) | δ5(%) | ψ (%) |
| 1 | 1115 | 1076 | 16.9 | 66.8 |
| 2 | 1110 | 1068 | 17.3 | 59.7 |
| 3 | 1095 | 1059 | 18.2 | 64.4 |
Embodiment 5
TB6 titanium alloy rod bar (Φ 45mm × 900mm) specific process step and technological parameter are shown in Table 10, the silk material after cold rolling
Performance after timeliness is shown in Table 11.
The processing step and technological parameter (T of 10 embodiment 5 of tableβ=796 DEG C)
Room temperature tensile properties after the silk material timeliness of 11 embodiment 5 of table
| Serial number | σb(MPa) | σ0.2(MPa) | δ5(%) | ψ (%) |
| 1 | 1100 | 1053 | 17.6 | 60.7 |
| 2 | 1098 | 1048 | 18.1 | 64.5 |
| 3 | 1125 | 1079 | 16.9 | 59.3 |
Claims (10)
1. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method, which is characterized in that this method includes
Following steps：
Step 1: electric furnace is heated to (Tβ+ 20) DEG C~(Tβ+ 40) DEG C, to be packed into after temperature Φ 40mm~Φ 45mm × 800mm~
The TB6 titanium alloy rod bar of 1200mm specification, by the diameter calculation soaking time of bar, soaking time be 0.4min/mm~
Then 0.6min/mm carries out multistage hot deformation to the bar of Φ 9mm~Φ 10mm specification, controls hot rolling deformation amount per pass
It is 40%~50%, it is air-cooled to arrive room temperature, bar is obtained, then bar is cut into scale by 4000mm long；
Step 2: electric furnace is heated to (Tβ+ 20) DEG C~(Tβ+ 40) DEG C, to being packed into bar obtained in step 1, every furnace after temperature
Bar quantity is controlled at 8~10, and 30min is kept the temperature after stove arrives temperature again, is straightened, is then cooled to room temperature；
Step 3: bar obtained in step 2 to be added to Φ 7.5mm~Φ 8mm with Centreless lathe machine, then be cold rolled to Φ
6mm~Φ 7mm controls total deformation 15%~36%, obtains silk material；
Step 4: electric furnace is heated to 520 DEG C~560 DEG C, it is packed into silk material obtained in step 3 after arriving temperature, is arrived again to stove
Soaking time 30min~60min after temperature, it is air-cooled to arrive room temperature.
2. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, electric furnace is heated to (T in the step 1β+ 25) DEG C~(Tβ+35)℃。
3. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, electric furnace is heated to (T in the step 1β+30)℃。
4. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, electric furnace is heated to (T in the step 2β+ 25) DEG C~(Tβ+35)℃。
5. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, electric furnace is heated to (T in the step 2β+30)℃。
6. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, the control of cold rolling total deformation is 20%~30% in the step 3.
7. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, the control of cold rolling total deformation is 25% in the step 3.
8. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, electric furnace is heated to 530 DEG C~550 DEG C in the step 4.
9. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, electric furnace is heated to 535 DEG C~545 DEG C in the step 4.
10. a kind of High-strength high-plasticity TB6 titanium alloy wire materials structure property uniformity control method according to claim 1,
It is characterized in that, electric furnace is heated to 540 DEG C in the step 4.
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Cited By (4)
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| CN110773686A (en) * | 2019-11-05 | 2020-02-11 | 西安西工大超晶科技发展有限责任公司 | Preparation method of TB3 titanium alloy wire for fastener |
| CN111940538A (en) * | 2020-07-24 | 2020-11-17 | 中国航发北京航空材料研究院 | Cold rolling method for TC27 titanium alloy pipe |
| CN113174551A (en) * | 2021-03-30 | 2021-07-27 | 西安交通大学 | Dual-phase high-strength high-plasticity titanium alloy with heterogeneous laminated structure and preparation method thereof |
| CN114012009A (en) * | 2021-10-13 | 2022-02-08 | 中国航发北京航空材料研究院 | Thermal mechanical treatment method for multilevel uniform refinement of titanium alloy bar structure |
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