CN106676324A - Carbon-contained high-niobium titanium aluminum base single crystal alloy - Google Patents
Carbon-contained high-niobium titanium aluminum base single crystal alloy Download PDFInfo
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- CN106676324A CN106676324A CN201611250812.7A CN201611250812A CN106676324A CN 106676324 A CN106676324 A CN 106676324A CN 201611250812 A CN201611250812 A CN 201611250812A CN 106676324 A CN106676324 A CN 106676324A
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- alloy
- single crystal
- carbon
- titanium aluminum
- crystal alloy
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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
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/52—Alloys
Abstract
The invention discloses a carbon-contained high-niobium titanium aluminum base single crystal alloy. The alloy comprises, by mass, 0.01%-0.1% of C, 10.00%-19.69% of Nb, 13.48%-30% of Al and the balance Ti. According to the carbon-contained high-niobium titanium aluminum base single crystal alloy, the carbon element is added into a high-niobium titanium aluminum alloy, and the carbon-contained high-niobium titanium aluminum base single crystal alloy is prepared; and compared with a high-niobium titanium aluminum polycrystal alloy free of carbon and a single crystal alloy of the high-niobium titanium aluminum polycrystal alloy free of carbon, the carbon-contained high-niobium titanium aluminum base single crystal alloy is good in plasticity; and in addition, the alloy intensity is obviously strengthened, and the industrial application performance of the titanium aluminum base alloy is obviously improved.
Description
Technical field
The present invention relates to a kind of carbon containing high-Nb Ti-Al base single crystal alloy, the alloy strength is high, plasticity is good, belongs to thermal structure
Field of alloy material.
Background technology
The performance of traditional Ni bases and Ti based high-temperature alloys is gradually difficult to meet the performance of New Times aero-engine will
Ask, it is therefore desirable to explore more excellent reliable material and processing technique further to improve the performance of alternate-engine,
Thrust-weight ratio is such as improved, mitigated fuselage weight, improved service life etc..For automobile of future generation and aircraft engine, new structure
Material must be " higher, lighter ", could so improve efficiency, reduce fuel consumption and substantially reduce the row of carbon dioxide
Put.In recent decades, researcher has turned one's attention to the high temperature alloy of a new generation, TiAl intermetallic compound.Between TiAl metals
Compound has low-density (3.9~4.2g/cm3), good elevated temperature strength, creep resistance, good antioxidation and flame resistant
The advantages of performance.By the research of recent decades, TiAl intermetallic compound has been successfully applied to automobile and aircraft engine
Industry.1999, MIT was successfully obtained racing engine increasing using the original Ni based alloys of TiAl-Nb alloy replacings
Pressure turbine, the starting time for efficiently reducing electromotor is, the combination property that improve electromotor, this is TiAl intermetallics
The business application first of thing.2002, quantity-produced forging processing high-performance gamma-TiAl alloy racing car valve had started to research and development.
2007, Boeing adopted composition and has successfully made aero-engine low-pressure turbine blade for Ti-48Al-2Cr-2Nb alloys,
This achievement significantly reduces the weight of electromotor and has excellent performance.However, TiAl-base alloy also has which to apply
Limitation, such as low temperature-room type plasticity, poor deformation processing performance, relatively low operating temperature etc., these defects are seriously hindered
Application of the TiAl alloy in engineering.
PST (Polysynthetic Twinned, PST) TiAl single crystal alloys, because between its mechanical property and lamellar orientation
Close ties and especially attract people's attention.It is contemplated that, it is following to adopt TiAl base single crystal alloys
The engine blade of preparation and other components of machine will further improve the performance of aero-engine.Monocrystalline
The microstructure and property of alloy is closely related with the composition of alloy, using suitable alloying component for intensity, the modeling of single crystal alloy
Property, the improvement of high-temperature behavior have very important significance.For example, the addition of Nb elements has been obviously improved the use of TiAl alloy
Performance, such as intensity, high-temperature oxidation resistance and creep resisting ability etc..And for example, the addition of alloying element C has solution strengthening and sinks
Shallow lake hardening effect, suitable carbon content have potential value for the lifting of high niobium containing titanium aluminium alloy and its single crystal alloy performance.
High niobium Ti Al alloy and its single crystal alloy have become researcher focus of attention as the gamma-TiAl alloy of a new generation how
The performance for further lifting high niobium Ti Al alloy and its single crystal alloy is to study instantly one of focus of TiAl alloy.
The content of the invention
It is an object of the invention to provide a kind of carbon containing high-Nb Ti-Al base single crystal alloy, good for desired strength height, plasticity
Thermal structure component of machine.
To solve the above problems, the technical solution used in the present invention is：A kind of carbon containing high-Nb Ti-Al base single crystal alloy, by matter
Amount percentages, alloying component are as follows：0.01~0.1%C, 10.00~19.69%Nb, 13.48~30%Al, remaining is Ti.
Carbon containing high-Nb Ti-Al base single crystal alloy of the present invention compared with not carbon containing titanium aluminium base polycrystalline alloy and its single crystal alloy, its
Remarkable advantage is：(1) carbon containing titanium aluminium base single crystal alloy of the present invention has a solution strengthening effect due to the addition of carbon, and
The carbide formed at crystal boundary and lamellar interface has precipitation enhancement, and can stablize lamellar structure knot to a certain extent
Structure, alloy strength are significantly improved.(2) not only intensity is high for carbon containing titanium aluminium base single crystal alloy of the present invention, and plasticity is preferably, tool
There is excellent comprehensive mechanical property, the admixture of Nb in alloy can either lift the mobile energy of super-dislocation, while can promote thin
Little nano twin crystal face is more readily formed.The collective effect of both makes high niobate single crystal alloy be provided simultaneously with good intensity and modeling
Property.
Description of the drawings
Macroscopic organization charts of the Fig. 1 for single crystal alloy of the present invention (embodiment 1).
Fig. 2 is the alloy structure ideograph of alloy of the present invention.
Fig. 3 is single crystal alloy of the present invention (embodiment 1) scanning electron microscope micro-organization chart, wherein, γ/α2/ γ splat boundaries
There is granular carbide in place.
Fig. 4 is carbon containing titanium aluminium base single crystal alloy (embodiment 1) of the present invention, not carbon containing titanium aluminium base polycrystalline alloy, carbon containing titanium aluminum
Quito peritectic alloy and not carbon containing titanium aluminium base single crystal alloy room temperature Compressive Mechanical Properties comparison diagram.
Specific embodiment
Embodiment 1
A kind of carbon containing high-Nb Ti-Al base single crystal alloy, it is characterised in that by mass percentage, alloying component is as follows：
0.06%C, 17.69%Nb, 28.90%Al, remaining is Ti.The preparation method is：(1) dispensing.By mass percentage, close
Golden composition is as follows：0.06%C, 17.69%Nb, 28.90%Al, remaining is Ti.(2) prepared by single crystal alloy：Using smelting equipment
Or single crystal preparation system prepares the alloy.
Obtained single crystal alloy macroscopic organization chart is as shown in Figure 1.It is illustrated in figure 2 the microstructure ideograph of alloy, carbon
Compound granule is almost always existed in along γ/γ lamellar interfaces, rather than is present in inside γ lamellas.The formation of all precipitate
It is proved to and rich titanium phase α2Dissolving it is related.This is as C is in α2Solid solubility in phase is larger, and the solid solubility in γ phases is minimum,
When excessive carbon is more than α2During phase solid solubility, just in γ/α2Carbide precipitation is produced at/γ splat boundaries.At lamellar interface
Carbide can produce interaction, so as to put forward heavy alloyed intensity, the especially creep strength of alloy with lamella.As schemed
The 3 scanning electron microscope micro-organization charts for showing alloy, γ/α2There is granular carbide at/γ splat boundaries.The high niobium titanium of carbon containing
Aluminium base single crystal alloy, not carbon containing high-Nb Ti-Al Quito peritectic alloy, carbon containing high-Nb Ti-Al base single crystal alloy, not carbon containing high-Nb Ti-Al base
The room temperature Compressive Mechanical Properties of polycrystalline alloy are contrasted as shown in Figure 4 and Table 1.Carbon containing high-Nb Ti-Al base single crystal alloy intensity of the present invention
Apparently higher than other alloys, and plasticity is also preferably, with excellent comprehensive mechanical property.Its reason is that the solid solution of C element is drawn
The solution strengthening effect for rising, in addition, the lifting of alloy strength also has benefited from what is formed when carbon content is spent more than alloy solid solution
Carbide and the precipitation strengthening effect that causes.Precipitation enhancement is mainly the interaction between dislocation and carbide and produces
's.Carbide produces pinning effect to dislocation, the movement of dislocation is limited in alloy deformation, so as to improve the strong of alloy
Degree.Even at relatively high temperatures, the interaction effect between this dislocation and carbide can be observed.Only when temperature foot
When enough high, dislocation produces to climb during deforming and leaves original slide surface and get around carbide precipitation.On the other hand, alloy knot
Nb admixtures in structure, can either lift the mobile energy of super-dislocation, while tiny nano twin crystal face can be promoted to be easier shape
Into.The collective effect of both makes high niobate single crystal alloy be provided simultaneously with good intensity and plasticity.
Embodiment 2
A kind of carbon containing high-Nb Ti-Al base single crystal alloy, it is characterised in that by mass percentage, alloying component is as follows：
0.03%C, 19.58%Nb, 27.8%Al, remaining is Ti.The preparation method is：(1) dispensing.By mass percentage, close
Golden composition is as follows：0.06%C, 17.69%Nb, 28.90%Al, remaining is Ti.(2) prepared by single crystal alloy.Implementation result is shown in Table
1, as known from Table 1, the intensity of the carbon containing high-Nb Ti-Al single crystal alloy of the present embodiment is significantly improved, and plasticity is also preferable.
Embodiment 3
A kind of carbon containing high-Nb Ti-Al base single crystal alloy, it is characterised in that by mass percentage, alloying component is as follows：
0.09%C, 15.66%Nb, 29.24%Al, remaining is Ti.The preparation method is：(1) dispensing.By mass percentage, close
Golden composition is as follows：0.09%C, 15.66%Nb, 29.24%Al, remaining is Ti.(2) prepared by single crystal alloy.Implementation result is shown in Table
1, as known from Table 1, the intensity of the carbon containing high-Nb Ti-Al single crystal alloy of the present embodiment is significantly improved, and plasticity is also preferable.
Table 1
Above-mentioned embodiment is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
Change, remodeling, addition or replacement that the technical staff in domain is made in the range of technical scheme, also belong to this
Bright protection domain.
Claims (2)
1. a kind of carbon containing high-Nb Ti-Al base single crystal alloy, it is characterised in that by mass percentage, alloying component is as follows：0.01~
0.1% C, 10.00 ~ 19.69% Nb, 13.48 ~ 30% Al, remaining is Ti.
2. the preparation method of single crystal alloy as claimed in claim 1.
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| CN201611250812.7A CN106676324A (en) | 2016-12-30 | 2016-12-30 | Carbon-contained high-niobium titanium aluminum base single crystal alloy |
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| CN201611250812.7A CN106676324A (en) | 2016-12-30 | 2016-12-30 | Carbon-contained high-niobium titanium aluminum base single crystal alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113600834A (en) * | 2021-08-11 | 2021-11-05 | 上海工程技术大学 | Preparation method of high-niobium titanium-aluminum alloy with excellent room-temperature plasticity based on laser melting deposition |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000017359A (en) * | 1998-06-30 | 2000-01-18 | Univ Kyoto | PRODUCTION OF SINGLE CRYSTAL Ti-Al-Si ALLOY |
| US6436208B1 (en) * | 2001-04-19 | 2002-08-20 | The United States Of America As Represented By The Secretary Of The Navy | Process for preparing aligned in-situ two phase single crystal composites of titanium-niobium alloys |
| CN101875106A (en) * | 2009-11-20 | 2010-11-03 | 北京科技大学 | Preparation method of directional solidification high-niobium TiAl-base alloy |
| CN104878452A (en) * | 2015-05-13 | 2015-09-02 | 南京理工大学 | High-temperature high-strength TiAl-Nb monocrystal and preparation method thereof |
| CN104878444A (en) * | 2015-05-13 | 2015-09-02 | 南京理工大学 | Preparation method of TiAl-base alloy monocrystal |
-
2016
- 2016-12-30 CN CN201611250812.7A patent/CN106676324A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000017359A (en) * | 1998-06-30 | 2000-01-18 | Univ Kyoto | PRODUCTION OF SINGLE CRYSTAL Ti-Al-Si ALLOY |
| JP3054696B2 (en) * | 1998-06-30 | 2000-06-19 | 京都大学長 | Method for producing Ti-Al-Si alloy |
| US6436208B1 (en) * | 2001-04-19 | 2002-08-20 | The United States Of America As Represented By The Secretary Of The Navy | Process for preparing aligned in-situ two phase single crystal composites of titanium-niobium alloys |
| CN101875106A (en) * | 2009-11-20 | 2010-11-03 | 北京科技大学 | Preparation method of directional solidification high-niobium TiAl-base alloy |
| CN104878452A (en) * | 2015-05-13 | 2015-09-02 | 南京理工大学 | High-temperature high-strength TiAl-Nb monocrystal and preparation method thereof |
| CN104878444A (en) * | 2015-05-13 | 2015-09-02 | 南京理工大学 | Preparation method of TiAl-base alloy monocrystal |
Non-Patent Citations (1)
| Title |
|---|
| H.F. CHLADIL ET AL.: "Phase transformations in high niobium and carbon containing gamma-TiAl based alloys", 《INTERMETALLICS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113600834A (en) * | 2021-08-11 | 2021-11-05 | 上海工程技术大学 | Preparation method of high-niobium titanium-aluminum alloy with excellent room-temperature plasticity based on laser melting deposition |
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Application publication date: 20170517 |