CN107904443A - Strong super-high-plasticity titanium alloy in one kind - Google Patents
Strong super-high-plasticity titanium alloy in one kind Download PDFInfo
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- CN107904443A CN107904443A CN201711373202.0A CN201711373202A CN107904443A CN 107904443 A CN107904443 A CN 107904443A CN 201711373202 A CN201711373202 A CN 201711373202A CN 107904443 A CN107904443 A CN 107904443A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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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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Abstract
Strong super-high-plasticity titanium alloy, the mass percent of its chemical composition are in one kind：V 10%, Fe 2%, Al 3%, Zr 2~5%, surplus are Ti and inevitable impurity；The preparation method of above-mentioned titanium alloy mainly uses non-consumable arc furnace melting, after alloy is smelted into an entirety for the first time, turn-over carries out secondary smelting in crucible, so 8 times repeatedly, first 40 50 minutes are kept the temperature at 800 DEG C, then carry out 11 passes, every time volume under pressure is 1.2 1.4mm, alloy is put back in stove between twice time and keeps the temperature 57 minutes, the initial average height of ingot casting is 18.0 19.5mm, it is 4.5 5.0mm finally to have rolled thickness, and maximum rolling reduction reaches 70 75%, water cooling to room temperature.Present invention process is simple, and compared with Ti 10V 2Fe 3Al, the titanium alloy of preparation drastically increases alloy plasticity while proof strength, and elongation percentage is up to 46.59%.
Description
Technical field
The invention belongs to field of material technology, more particularly to a kind of titanium alloy and its milling method.
Background technology
Titanium alloy is because of its higher specific strength, nonmagnetic, extremely strong corrosion resistance, good welding performance, aviation,
The high-end technical field such as space flight, naval vessel, nuclear power, weaponry, oil exploitation and biomedical material increasingly occupies leading position.
TB6 (Ti-10V-2Fe-3Al) is used as a kind of metastable β Titanium-alloy, also tough with being broken in addition to having the characteristics that the above
The features such as property and quenching degree are good, and forging temperature is low, has been applied to Boeing series aircraft structural member, destroys eight-II aircaft configurations
Part.It is sensitive for melting and heat processing technique when containing certain content F e elements in titanium alloy, Fe segregations easily occur, form β
Spot, is macroscopically showing as temperature-room type plasticity and low cycle fatigue property degradation, so as to restrict its application.It is inclined for Fe in TB6
The problem of analysis causes plasticity to decline, the measure mainly taken are control smelting parameters, using modes such as intermediate alloys.Currently, pin
In the case that research to titanium alloy mechanical property mainly ensures its plasticity, its intensity is improved as far as possible.For forging titanium alloy,
No matter from the point of view of workability or service reliability, its plasticity is all critically important performance indicator.Compared to traditional heat
The means such as processing, the method by optimizing its component, while reaching guarantee alloy strength, improves the plasticity of alloy, has more
High realistic meaning.
The content of the invention
It is an object of the invention to provide a kind of technique it is simple, while proof strength, alloy plasticity can be greatly improved
In strong super-high-plasticity titanium alloy.
The percentage by weight of chemical composition of the titanium alloy of the present invention is：V 10%, Fe 2%, Al 3%, Zr2~5%,
Surplus is Ti and inevitable impurity.
The optimum content of the Zr is 4%.
The preparation method of above-mentioned titanium alloy：
It is conventionally alloy pig by above-mentioned raw materials melting with non-consumable arc furnace, the back of the body of electric arc furnaces during melting
Bottom vacuum is 2.0 × 10-2Pa, Arc Welding Power operating current are 400A, operating voltage 20V.Alloy through being smelted into one for the first time
After a entirety, turn-over carries out secondary smelting in crucible, so repeatedly, amounts to 8 times；40-50 minutes first are kept the temperature at 800 DEG C, with
After carry out 11 passes, every time volume under pressure is 1.2-1.4mm, puts back in stove alloy between twice time and keeps the temperature 5-7 minutes,
The initial average height of ingot casting is 18.0-19.5mm, and it is 4.5-5.0mm finally to have rolled thickness, and maximum rolling reduction reaches 70-
75%, water cooling to room temperature.
The present invention has the following advantages that compared with prior art：
1st, the elongation percentage with mentioning Ti-10V-2Fe-3Al in pertinent literature is 6-19%, and the alloy is in the same of proof strength
When, alloy plasticity is greatly improved, elongation percentage reaches 46.59%, is the 245.2%- of Ti-10V-2Fe-3Al in document
776.5%.
2nd, rolling mill practice is simple, can be designed as the alloy from now on and Ti-10V-2Fe-3Al preparation processes it is effective according to
According to.
Brief description of the drawings
Fig. 1 is that the engineering in the embodiment of the present invention under the conditions of Ti-10V-2Fe-3Al- (2-5) Zr rollings state uniaxial tension should
Force-strain curve figure；
Fig. 2 is the metallographic microstructure figure of titanium alloy made from the embodiment of the present invention 1.
Embodiment
Embodiment 1
It is by weight percentage：V 10%, Fe 2%, Al 3%, Zr 4%, surplus are Ti and inevitable impurity,
By Al silks that Ti silks that 64.80g purity is 99.9%, 2.40g purity are 99.5%, 1.60g purity be 99.99% it is high-purity
The feed proportionings such as the Zr silks that high-purity V, 3.20g purity that Fe, 8.00g purity are 99.9% is 99.99, with non-consumable vacuum arc
Stove melting.The back end vacuum of electric arc furnaces is 2.0 × 10 during melting-2Pa, Arc Welding Power operating current are 400A, and operating voltage is
20V.Alloy after being smelted into an entirety for the first time, and turn-over carries out secondary smelting in crucible, so repeatedly, amounts to 8 times.
Treat that alloy melting finishes, 40 minutes are kept the temperature for 800 DEG C in heat-treatment furnace, 11 passages are carried out in 200 type duo mills
Alloy is put back in stove and keeps the temperature 5 minutes by rolling, each volume under pressure between 1.35mm twice time, and the initial average height of ingot casting is
18.0mm, it is 5.0mm finally to have rolled thickness, and maximum rolling reduction reaches 70%, and alloy is cooled to room temperature with water quenching method, system
Strong super-high-plasticity titanium alloy in obtaining.
Alloy sheets are cut into tensile sample with wire electric discharge, mechanics is carried out with the stretching mechanical testing machine with extensometer
Performance test.The titanium alloy that test result shows to prepare has excellent mechanical performance, specific such as table 1：
The basic mechanical performance of the present invention rolling state alloy of table 1
As shown in Figure 1, it can be seen that add the yield strength, fracture strength, elongation percentage of the alloy of 4%Zr have it is certain
Improve, its elongation percentage is up to 46.59% especially under the conditions of uniaxial tension, for the 245.2%- of Ti-10V-2Fe-3Al in document
776.5%.
As shown in Figure 2, it can be seen that the microscopic structure of alloy is by matrix β and the α phase compositions being distributed in the base, and α phases are in β
Into corynebacterium on matrix, and there is certain orientation, add the plasticity of alloy to a certain extent.
Embodiment 2
Percentage by weight according to chemical composition is：V 10%, Fe 2%, Al 3%, Zr 2%, surplus is Ti and can not keep away
The impurity exempted from, is by Al silks that Ti silks that 66.40g purity is 99.9%, 2.40g purity are 99.5%, 1.60g purity
The feed proportionings such as the Zr silks that high-purity V, 1.60g purity that 99.99% high-purity Fe, 8.00g purity is 99.9% is 99.99, are used
Non-consumable arc furnace melting.The back end vacuum of electric arc furnaces is 2.0 × 10 during melting-2Pa, Arc Welding Power operating current are
400A, operating voltage 20V.For alloy after being smelted into an entirety for the first time, turn-over carries out secondary smelting in crucible, so anti-
It is multiple, amount to 8 times.
Treat that alloy melting finishes, 45 minutes are kept the temperature for 800 DEG C in heat-treatment furnace, 11 passages are carried out in 200 type duo mills
Alloy is put back in stove and keeps the temperature 6 minutes by rolling, each volume under pressure between 1.25mm twice time, and the initial average height of ingot casting is
18.5mm, it is 4.8mm finally to have rolled thickness, and maximum rolling reduction reaches 74%, and rolling finishes, and alloy water quenching method is cold
To room temperature, in strong super-high-plasticity titanium alloy.
Embodiment 3
Percentage by weight according to chemical composition is：V 10%, Fe 2%, Al 3%, Zr 3%, surplus is Ti and can not keep away
The impurity exempted from, is by Al silks that Ti silks that 65.60g purity is 99.9%, 2.40g purity are 99.5%, 1.60g purity
The feed proportionings such as the Zr silks that high-purity V, 2.40g purity that 99.99% high-purity Fe, 8.00g purity is 99.9% is 99.99, are used
Non-consumable arc furnace melting.The back end vacuum of electric arc furnaces is 2.0 × 10 during melting-2Pa, Arc Welding Power operating current are
400A, operating voltage 20V.For alloy after being smelted into an entirety for the first time, turn-over carries out secondary smelting in crucible, so anti-
It is multiple, amount to 8 times.
Treat that alloy melting finishes, 45 minutes are kept the temperature for 800 DEG C in heat-treatment furnace, 11 passages are carried out in 200 type duo mills
Alloy is put back in stove and keeps the temperature 6 minutes by rolling, each volume under pressure between 1.20mm twice time, and the initial average height of ingot casting is
19.0mm, it is 4.7mm finally to have rolled thickness, and maximum rolling reduction reaches 73%, and rolling finishes, and alloy water quenching method is cold
To room temperature, in strong super-high-plasticity titanium alloy.
Embodiment 4
Percentage by weight according to chemical composition is：V 10%, Fe 2%, Al 3%, Zr 5%, surplus is Ti and can not keep away
The impurity exempted from, is by Al silks that Ti silks that 64.00g purity is 99.9%, 2.40g purity are 99.5%, 1.60g purity
The feed proportionings such as the Zr silks that high-purity V, 4.00g purity that 99.99% high-purity Fe, 8.00g purity is 99.9% is 99.99, are used
Non-consumable arc furnace melting, the back end vacuum of electric arc furnaces is 2.0 × 10 during melting-2Pa, Arc Welding Power operating current are
400A, operating voltage 20V.For alloy after being smelted into an entirety for the first time, turn-over carries out secondary smelting in crucible, so anti-
It is multiple, amount to 8 times.
Treat that alloy melting finishes, 50 minutes are kept the temperature for 800 DEG C in heat-treatment furnace, 11 passages are carried out in 200 type duo mills
Alloy is put back in stove and keeps the temperature 7 minutes by rolling, each volume under pressure between 1.40mm twice time, and the initial average height of ingot casting is
19.5mm, it is 4.5mm finally to have rolled thickness, and maximum rolling reduction reaches 75%, and water cooling to room temperature, strong superelevation is moulded in being made
Property titanium alloy.Rolling finishes, and alloy is cooled to room temperature with water quenching method, in strong super-high-plasticity titanium alloy.
Claims (3)
1. strong super-high-plasticity titanium alloy in one kind, it is characterised in that：The percentage by weight of its chemical composition is：V 10%, Fe
2%th, Al 3%, Zr 2~5%, surplus are Ti and inevitable impurity.
2. strong super-high-plasticity titanium alloy according to claim 1, it is characterised in that：The content of the Zr is 4%.
3. the preparation method of the titanium alloy of claim 1, it is characterised in that：With non-consumable arc furnace melting, electricity during melting
The back end vacuum of arc stove is 2.0 × 10-2Pa, Arc Welding Power operating current are 400A, operating voltage 20V；Alloy is through first
After being smelted into an entirety, turn-over carries out secondary smelting in crucible, so repeatedly, amounts to 8 times；40-50 is first kept the temperature at 800 DEG C
Minute, 11 passes are then carried out, every time volume under pressure is 1.2-1.4mm, and alloy is put back in stove between twice time and is kept the temperature
5-7 minutes, the initial average height of ingot casting was 18.0-19.5mm, and it is 4.5-5.0mm finally to have rolled thickness, maximum rolling deformation
Amount reaches 70-75%, water cooling to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711373202.0A CN107904443A (en) | 2017-12-19 | 2017-12-19 | Strong super-high-plasticity titanium alloy in one kind |
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| CN201711373202.0A CN107904443A (en) | 2017-12-19 | 2017-12-19 | Strong super-high-plasticity titanium alloy in one kind |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109082561A (en) * | 2018-09-27 | 2018-12-25 | 燕山大学 | A kind of high-ductility titanium alloy and preparation method thereof |
| CN112662914A (en) * | 2020-12-08 | 2021-04-16 | 燕山大学 | Low-elastic-modulus high-plasticity titanium alloy and preparation method and application thereof |
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| CN1902331A (en) * | 2003-07-03 | 2007-01-24 | 德国泰坦有限公司 | Beta-titanium alloy, method for producing a hot-rolled product based on said alloy and the uses thereof |
| JP2009007679A (en) * | 2008-09-18 | 2009-01-15 | Sumitomo Metal Ind Ltd | Titanium alloy, and method for producing titanium alloy material |
| JP4263987B2 (en) * | 2003-11-27 | 2009-05-13 | 株式会社神戸製鋼所 | High-strength β-type titanium alloy |
| CN101528956A (en) * | 2006-10-26 | 2009-09-09 | 新日本制铁株式会社 | Beta titanium alloy |
| CN106222486A (en) * | 2016-10-08 | 2016-12-14 | 燕山大学 | A kind of high intensity zirconium titanium ferro-aluminum vanadium alloy and preparation method thereof |
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2017
- 2017-12-19 CN CN201711373202.0A patent/CN107904443A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1902331A (en) * | 2003-07-03 | 2007-01-24 | 德国泰坦有限公司 | Beta-titanium alloy, method for producing a hot-rolled product based on said alloy and the uses thereof |
| JP4263987B2 (en) * | 2003-11-27 | 2009-05-13 | 株式会社神戸製鋼所 | High-strength β-type titanium alloy |
| CN101528956A (en) * | 2006-10-26 | 2009-09-09 | 新日本制铁株式会社 | Beta titanium alloy |
| JP2009007679A (en) * | 2008-09-18 | 2009-01-15 | Sumitomo Metal Ind Ltd | Titanium alloy, and method for producing titanium alloy material |
| CN106222486A (en) * | 2016-10-08 | 2016-12-14 | 燕山大学 | A kind of high intensity zirconium titanium ferro-aluminum vanadium alloy and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109082561A (en) * | 2018-09-27 | 2018-12-25 | 燕山大学 | A kind of high-ductility titanium alloy and preparation method thereof |
| CN112662914A (en) * | 2020-12-08 | 2021-04-16 | 燕山大学 | Low-elastic-modulus high-plasticity titanium alloy and preparation method and application thereof |
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Application publication date: 20180413 |