CN107058801B - A kind of cast titanium alloy being suitable for 560~650 DEG C - Google Patents
A kind of cast titanium alloy being suitable for 560~650 DEG C Download PDFInfo
- Publication number
- CN107058801B CN107058801B CN201710136146.2A CN201710136146A CN107058801B CN 107058801 B CN107058801 B CN 107058801B CN 201710136146 A CN201710136146 A CN 201710136146A CN 107058801 B CN107058801 B CN 107058801B
- Authority
- CN
- China
- Prior art keywords
- alloy
- titanium alloy
- temperature
- casting
- strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
A kind of cast titanium alloy being suitable for 560~650 DEG C, including Ti, Al, Sn, Zr, Mo, Nb, Si, Ta and/or C, surplus is impurity, it is based on Ti Al Sn Zr Mo Si systems basis, stringent control reduces the Sn constituent contents of casting character, the content of each element is adjusted simultaneously, and is properly added a small amount of Nb, Ta, C element.Casting character of the present invention is excellent, and tearing tendency is small, can be used for a long time at 550 DEG C, 600~650 DEG C are on active service in short-term, its creep resistance and thermal stability can meet the casting high-temperature titanium alloy of requirement at high temperature.
Description
Technical field
The invention belongs to titanium alloy technical fields, and in particular to the casting high temperature titanium being on active service in short-term to a kind of 560~650 DEG C
Alloy.
Background technology
Titanium alloy is obtained in aerospace field due to having many advantages, such as that density is small, intensity is high, corrosion-resistant, high temperature resistant
To being widely applied, especially as materials for aeroengines.High-temperature titanium alloy is opened to improve aero-engine thrust-weight ratio
Hair, include need to strengthen based on solution strengthening in a manner of conventional high-temperature titanium alloy and Ti-Al systems based on order-hardening it is golden
Compound between category, the former can be divided into two classes：Alpha+beta type and nearly α types.Alpha+beta type high-temperature titanium alloy temperature in use reaches as high as 500 DEG C of left sides
The right side, its main feature is that beta stable element content is higher, β phases content is more at room temperature, and heat treatment reinforcement can be used in the overwhelming majority.And nearly α
Contain only a small amount of β phases (volume fraction 3%~10%) in Type Titanium Alloy, beta stable element content close to its solid solubility in α phases,
The high creep strength of alpha titanium alloy and the high static strength of alpha and beta titanium alloy are taken into account, temperature in use can reach 600 DEG C.
Currently, high temperature deformation titanium alloy is mainly used in aircraft engine drum barrel, high-pressure compressor wheel disc and low-pressure turbine
Blade etc., high temperature cast titanium alloy have been used for athodyd " jaw formula " air intake duct, guided missile nacelle, the gyro shell of guided missile
The missile wing etc. of body, Sparrow.With the raising of temperature in use, the requirement to titanium alloy performance is more harsh, not only needs good
Fatigue toughness well, fracture strength, stronger hot corrosion resistance, stronger antioxygenic property and higher intensity, Er Qiexu
Want good oxidisability and structure stability and reliable performance.
Ripe high-temperature titanium alloy mainly has Ti-6242S, a Ti-1100 in the U.S. both at home and abroad at present, the IMI829 of Britain,
IMI834, Russian BT18y and BT36, and Chinese TA12, Ti60 etc., temperature in use and nominal composition such as 1 institute of table
Show.
1 various countries' high temperatures typical titanium alloy of table
Wherein, IMI829, IMI834, BT18y, BT36, Ti60 are deforming alloys, and Ti-6242S and Ti-1100 are castings
Alloy is only second to Ti-64 alloys in the application of external Ti-6242S alloys, and McDonnell-Douglas Corporation is in Ma flying speed strategic missile developments
In, it is the Ti6242S titanium alloy castings for being segmented mold by Design of Inlet under its punching engine jaw.Cast titanium alloy have at
The features such as this is low, with short production cycle, but it is more the defects of shrinkage porosite, shrinkage cavity in casting process, and stress is big, the yielding cracking of casting.
650 DEG C of anti-oxidant titanium alloys of high strength at high temperature of one kind that GE companies develop, patent publication No. US4906436,
By adding the alloying elements such as Hf and Ta, Testing Tensile Strength at Elevated Temperature, creep strength and the inoxidizability of alloy can be significantly improved.Disadvantage
It is that plasticity is relatively low, without thermal stability data, thermal stability is considered less.
In the innovation and creation of Publication No. CN104018027, one kind of Metal Inst., Chinese Academy of Sciences's research and development is novel
Heat-resistant titanium alloy, alloying component (mass fraction) is ranging from：Al5.4%~6.3%, Sn3.0%~5.0%, Zr2.5~
6.4%, Mo≤0.96%, Si0.25%~0.5%, Nb0.2%~0.5%, Ta0.3%~3.4%, W0.2%~1.6%,
C≤0.07%, O≤0.17%, Fe≤0.03%, surplus are Ti and inevitable impurity element.The alloy passes through different
Hot-working and heat treatment process are combined, and can obtain tensile strength and plasticity, lasting and creep strength and thermal stability not
With matching, when for making the parts such as blade of aviation engine, diskware, can be used for a long time at 600-650 DEG C；For making space flight
The high-temperature-resistant structures part such as aircraft skin uses in short-term at 700 DEG C or so.But since Sn constituent contents are high, casting character
It is poor, and due to the addition of the high melting element such as W, the subsequent affect of alloy is still not clear.
In the innovation and creation of Publication No. CN102978440, Xibei Inst. of Non-Ferrous Metals is researched and developed a kind of high in short-term
Warm high-strength titanium alloy, the alloy is by following weight percent at being grouped as：Al5.8%~7.0%, Sn2%~4%, Zr2%
~4%, W+Mo+Cr5.0%~7.0%, C≤0.15%, surplus are Ti and inevitable impurity；Wherein, Mo≤3.0%,
Cr≤1.0%.The alloy has good Short-time high-temperature high-strength titanium alloy thermal process performance, high by can get after heat treatment
Strong plasticity cooperation, 600 DEG C of its tensile strength reach 810MPa, and 500 DEG C of tensile strength reach 900MPa, are suitable for short time high temperature Gao Cheng
Power parts application.The disadvantage is that alloy fatigue performance is poor, alloy service life is short.
In the innovation and creation of Publication No. CN102839297, Harbin Institute of Technology discloses a kind of high-temperature titanium alloy,
Composition range is the alloy by mass percentage：Al5.5%~7%, Sn2%~4%, Zr8%~11%, Mo0.4%~
1.2%, Nb0.4%~1.5%, W0.5%~1.5%, Si0.15%~0.3%, surplus Ti.The alloy is in 700 DEG C of conditions
Lower tensile strength is 585.4MPa, elongation percentage 32.4%.The disadvantage is that being added to more Al elements in the alloy, can cause
Ti3Al brittlement phases are precipitated, to drop low-alloyed plasticity.
Invention content
Casting character existing in the prior art is poor, the unmatched step of strength plastic to overcome, and the present invention proposes one
Kind is suitable for 560~650 DEG C of cast titanium alloy.
The present invention include 86~86.5% Ti, 5.7~5.9% Al, 1.8~2.3% Sn, 3.4~3.9%
Zr, 0.46~0.9% Mo, 0.5~0.9% Nb, 0.12~0.18% Si, 0.3~0.7% Ta and 0~0.06
C, surplus are impurity；The percentage is mass percent.
The present invention is directed to the problems such as casting character present in above-mentioned background is poor, strength plastic mismatches, and provides a kind of casting
Function admirable is made, tearing tendency is small, can be used for a long time at 550 DEG C, and 600~650 DEG C are on active service in short-term, its creep is anti-at high temperature
Power and thermal stability can meet the casting high-temperature titanium alloy of requirement.
In order to achieve the goal above, the composition design of product alloy of the present invention is based on the base of Ti-Al-Sn-Zr-Mo-Si systems
On plinth, stringent control reduces the Sn constituent contents of casting character, while adjusting the content of each element, and is properly added a small amount of
Nb, Ta, C element.
The alloy of the present invention is nearly alpha titanium alloy, and wherein Al is typical α stable elements, but when the content of Al is more than α
After the solubility limit of phase, it can be precipitated with Ti3Al is the orderly α of base2Solid solution, alloy become fragile, and plasticity is remarkably decreased, thermal stability
It reduces.Wherein Al content is advisable with being no more than the 6%, equivalent thickness of aluminium no more than 9%, and Al equivalents herein are 6.9~7.6.
Sn and Zr is typical neutral element, plays solution strengthening effect to α phases, while can also improve its calorific intensity, favorably
In pressure processing and welding performance.Wherein Sn elements addition can excessively reduce the Hydrogen Embrittlement and casting character of material, also
Ti can be precipitated3The firmly crisp phases of Sn reduce thermal stability.
Mo, Nb, Ta are beta stable elements, and wherein Mo can improve the processing performance of alloy, promote the heat exposure of alloy,
But additive amount is advisable with being not less than 1%.Be properly added Nb elements can play improve alloy high-temp intensity effect and Mo it is same
Shi Zuoyong can also play the role of ensureing thermal stability and persistent.The most significant effect of Ta elements is to promote alloy
Inoxidizability, but since Ta elements fusing point is high, density is big, addition can excessively cause Ta to be unevenly distributed, to alloy
Overall performance generates larger harm, therefore the composition range of Ta should control below 1%.
Si can form (Sn, Zr) at high temperature6Si3Silicide, the pattern of silicide and distribution are to the creep under alloy high-temp
Performance and tensile property have large effect.The Ti-6242S in the U.S. can significantly improve alloy by adding the Si of 0.1wt%
The Si of creep strength and high-temperature behavior, excessive addition can then cause alloy plasticity, toughness to reduce, therefore, Si content general controls
In 0.1%-0.5%.
The effect of C element is to improve the tensile strength of alloy.
Compared with existing high-temperature titanium alloy alloy, the present invention has the following advantages：
One, the alloy system that the alloy in invention uses is Ti-Al-Sn-Zr-Mo-Nb-Si-Ta-C systems, essential element
Micro adjustment is done on the basis of existing 600 DEG C of high-temperature titanium alloys, wherein Al content is that 5.7%~5.9%, Al equivalents are
6.9~7.6, Al content is more than that 6% can lead to brittlement phase Ti3The precipitation of Al, greatly reduces alloy plasticity；Sn elements are neutral
Element plays solution strengthening effect to α phases, and improves calorific intensity, but the Sn of excessive addition can cause the casting character of alloy to become
There is the case where casting misrun in difference, poor fluidity, and the present invention is mainly to provide a kind of casting being suitable for 560 DEG C~650 DEG C
Titanium alloy, therefore by controlling Sn constituent contents 2% or so, not only ensure that the calorific intensity of alloy, but also improve conjunction
The casting character of gold significantly reduces crack initiation tendency, from the embodiment of the present invention 3,4,5 as can be seen that reducing Sn content energy
Enough improve the mobility and casting character of alloy, and substantially reduces casting crack quantity and size.
Two, be added to a small amount of Si, C element, the addition of a small amount of Si to the improvement result of alloy high temperature creep property very
Obviously, Si forms (Sn, Zr) at high temperature6Si3Silicide can improve alloy high-temp intensity and high temperature creep property, when containing for Si
Amount can lead to Precipitation of Silicide, therefore the content of Si elements is controlled 0.12%~0.18% in the present invention, is kept away more than 0.3%
Exempt to cause plasticity, toughness to reduce because of the precipitation of silicide.C element is added in the alloy, can improve alloy high-temerature creep and
Enduring quality, in embodiment 1,2, the addition of micro C element improves Alloy At Room Temperature tensile strength, the disadvantage is that plasticity has dropped.
Three, matrix element of the Ti elements as alloy controls 86%~86.5%, its advantage lies in being able to fully ensure that
The specific strength of alloy, since Ti affinity is good, titanium and oxygen haptoreaction in air, fine and close in Surface Creation, strong adsorption force
, the oxidation film that inertia is big, protect matrix not corroded.The content of stringent control heavy metal Ta simultaneously, mitigates alloy mass.Casting
Part can realize the matched well of elevated temperature strength and plasticity, at room temperature tensile strength after hot isostatic pressing and heat treatment appropriate
Reach 1050MPa, tensile strength reaches 620MPa at 550 DEG C, and elongation percentage is not less than 10%, and tensile strength reaches at 600 DEG C
600MPa, elongation percentage are not less than 10%.
Description of the drawings
Fig. 1 is crackle schematic diagram after the cracking cup coloring of embodiment 3；
Fig. 2 is crackle schematic diagram after the cracking cup coloring of embodiment 4；
Fig. 3 is crackle schematic diagram after the cracking cup coloring of embodiment 5.
Specific implementation mode
Embodiment 1
The present embodiment is a kind of casting high-temperature titanium alloy, including 86.5% Ti, 5.81% Al, 2.15% Sn,
The Ta of 3.46% Zr, 0.46% Mo, 0.65% Nb, 0.18% Si and 0.53%, surplus are impurity, the percentage
Than for mass percent.
Coupon sample is poured into a mould using cold crucible levitation melting stove, gained casts cylinder coupon a diameter of 14.5mm, a length of
180mm.Cast-on test bar passes through 920 DEG C/130MPa/2h hip treatments, to remove internal defect in cast.
Coupon after hot isostatic pressing is carried out to be dissolved+ageing treatment, heat treatment process is 1030 DEG C/2h/AC+700/2h/
AC, stretches standard sample size and sample tensile test method is implemented according to GB/T228-2010.Coupon different temperatures is drawn
It stretches performance and is shown in Table 2, wherein σbFor tensile strength, σ0.2For yield strength, δ is elongation percentage.
Embodiment 2
The present embodiment is a kind of casting high-temperature titanium alloy, including 86.3% Ti, 5.89% Al, 1.8% Sn,
3.47% Zr, 0.81% Mo, 0.63% Nb, 0.16% Si, 0.48% Ta and 0.06% C, surplus is impurity,
The percentage is mass percent.
The present embodiment coupon preparation method, hot isostatic pressing and heat treatment process are identical as disclosed in embodiment 1, and table 2 is given
Coupon tensile property under different temperatures is gone out.
Embodiment 3
The present embodiment is a kind of casting high-temperature titanium alloy, including 86.1% Ti, 5.7% Al, 2.3% Sn, 3.4%
Zr, 0.9% Mo, 0.5% Nb, 0.12% Si, 0.7% Ta, surplus is impurity, and the percentage is quality hundred
Divide ratio.Cracking cup sample is poured into a mould using cold crucible levitation melting stove, the precracked specimen being poured in will be poured and carry out penetrating inspection analysis, than
Compared with the crack number and size of its generation, the results are shown in Table 2, and Fig. 1 gives crackle schematic diagram after cracking cup coloring.
Embodiment 4
The present embodiment is a kind of casting high-temperature titanium alloy, including 86% Ti, 5.81% Al, 2.15% Sn, 3.9%
Zr, 0.74% Mo, 0.65% Nb, 0.16% Si, 0.3% Ta, surplus is impurity, and the percentage is quality
Percentage.Cracking cup sample is poured into a mould using cold crucible levitation melting stove, the precracked specimen being poured in will be poured and carry out penetrating inspection analysis,
Crackle is not observed in outer surface, and surface cracks quantity and size are as shown in table 2, and Fig. 2 is crackle signal after cracking cup coloring
Figure.
Embodiment 5
The present embodiment is a kind of casting high-temperature titanium alloy, including 86.2% Ti, 5.9% Al, 1.8% Sn,
3.47% Zr, 0.82% Mo, 0.9% Nb, 0.12% Si, 0.48% Ta and 0.04 C, surplus is impurity, institute
The percentage stated is mass percent.Cracking cup sample is poured into a mould using cold crucible levitation melting stove, the precracked specimen being poured in will be poured
Penetrating inspection analysis is carried out, crackle is not observed in outer surface, and surface cracks quantity and size are as shown in table 2, and Fig. 3 is cracking
Crackle schematic diagram after cup coloring.
Table 2
As can be seen from the table, with the raising of temperature, downward trend is presented in the tensile strength of coupon, and works as draft temperature
When increasing to 600 DEG C by 550 DEG C, tensile strength declines 20~30MPa, and embodiment 2 is compared to embodiment 1 due to adding on a small quantity
C element, mechanical properties improve, but plasticity reduces.The casting high-temperature titanium alloy of the present invention contains due to reducing Sn elements
Amount so that crack number is few, and crack size is small, has smaller tearing tendency.
Claims (1)
1. a kind of cast titanium alloy being suitable for 560~650 DEG C, which is characterized in that including 86~86.5% Ti, 5.7~
5.9% Al, 1.8~2.3% Sn, 3.4~3.9% Zr, 0.46~0.9% Mo, 0.5~0.9% Nb, 0.12~
The C of 0.18% Si, 0.3~0.7% Ta and 0~0.06, surplus are impurity；The percentage is mass percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710136146.2A CN107058801B (en) | 2017-03-09 | 2017-03-09 | A kind of cast titanium alloy being suitable for 560~650 DEG C |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710136146.2A CN107058801B (en) | 2017-03-09 | 2017-03-09 | A kind of cast titanium alloy being suitable for 560~650 DEG C |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107058801A CN107058801A (en) | 2017-08-18 |
| CN107058801B true CN107058801B (en) | 2018-10-16 |
Family
ID=59622017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710136146.2A Active CN107058801B (en) | 2017-03-09 | 2017-03-09 | A kind of cast titanium alloy being suitable for 560~650 DEG C |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107058801B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107760924A (en) * | 2017-10-24 | 2018-03-06 | 宝鸡金恒瑞金属科技有限公司 | A kind of preparation method of titanium alloy bicycle lock |
| CN108004430A (en) * | 2017-11-29 | 2018-05-08 | 成都创客之家科技有限公司 | A kind of titanium alloy metallic fiber for preparing filter core |
| CN115821184A (en) * | 2022-11-08 | 2023-03-21 | 河北钢研德凯科技有限公司 | Densification treatment method for ZTi60 titanium alloy and application thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772932A (en) * | 2005-04-27 | 2006-05-17 | 中国航空工业第一集团公司北京航空材料研究院 | High temperature Titanium alloy with high creepage resistance and high fatigue strength |
| CN102329983A (en) * | 2010-07-13 | 2012-01-25 | 宝山钢铁股份有限公司 | Titanium alloy capable of resisting high temperature higher than 600 DEG C |
| JP5747410B2 (en) * | 2011-06-03 | 2015-07-15 | 国立研究開発法人物質・材料研究機構 | Heat resistant titanium alloy |
| CN104561656A (en) * | 2014-12-16 | 2015-04-29 | 中国航空工业集团公司北京航空材料研究院 | High-temperature titanium alloy |
-
2017
- 2017-03-09 CN CN201710136146.2A patent/CN107058801B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107058801A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104532056B (en) | A kind of high-temperature titanium alloy and preparation method thereof | |
| CN107058801B (en) | A kind of cast titanium alloy being suitable for 560~650 DEG C | |
| CN108842082B (en) | A kind of Fe-Ni base cast superalloy and preparation method thereof | |
| AU2015359265B2 (en) | A ferritic alloy | |
| Guo et al. | Microstructure, properties and heat treatment process of powder metallurgy superalloy FGH95 | |
| Shen et al. | Effect of the Al, Cr and B elements on the mechanical properties and oxidation resistance of Nb-Si based alloys: a review | |
| EP3202931A1 (en) | Ni BASED SUPERHEAT-RESISTANT ALLOY | |
| JP7450639B2 (en) | Low stacking fault energy superalloys, structural members and their uses | |
| CN109536775B (en) | A kind of high-temperature titanium alloy and preparation method thereof | |
| CN102808111B (en) | Preparation method for nickel-based superalloy for exhaust valve | |
| CN106498237B (en) | A kind of Ni-Cr-Mo tungsten niobium aluminium titanium system high-temperature alloy material, preparation method and application | |
| CN101654764A (en) | Iron-nickel based highly elastic alloy, capillary pipe thereof and method for manufacturing capillary pipe | |
| CN109536776B (en) | Heat-resistant titanium alloy and preparation method thereof | |
| CN111020290A (en) | Casting titanium alloy material suitable for 650-plus-750 ℃ high temperature and preparation method thereof | |
| KR101387551B1 (en) | High strength titanium alloy with excellent oxidation resistance and formability and method for manufacturing the same | |
| CN108165820A (en) | A kind of strong heat-resistant titanium alloy of superelevation and sheet alloy and preparation method in short-term | |
| CN105886854A (en) | Preparing method for reducing Fe intermediate phase harm and improving mechanical performance of A356 cast alloy containing scandium and zircon | |
| CN112958784A (en) | Method for actively controlling uniform distribution and growth direction of reinforcing phase in particle-reinforced titanium-based composite material | |
| CN104762526A (en) | Low-cost and high-strength Ti-Zr-Al-F2 alloy | |
| WO2015182454A1 (en) | TiAl-BASED CASTING ALLOY AND METHOD FOR PRODUCING SAME | |
| CN101148728A (en) | NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Ta | |
| CN107267778B (en) | A kind of magnesium smelting reduction pot and preparation method thereof | |
| CN108441707A (en) | A kind of high intensity tungstenic system nickel-base high-temperature alloy material and its preparation method and application | |
| CN112708788B (en) | Method for improving plasticity of K403 alloy, die material and product | |
| CN108330336A (en) | A kind of high antioxygenic property group of the lanthanides nickel base superalloy and its preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210302 Address after: 401135 No. 618 Liangjiang Avenue, Longxing Town, Yubei District, Chongqing Patentee after: Chongqing lianghang metal material Co.,Ltd. Address before: 710072 No. 127 Youyi West Road, Shaanxi, Xi'an Patentee before: Northwestern Polytechnical University |