CN113927031B - Method for improving performance of titanium alloy by doping Y with Ti-5Al-5Mo-5V-3Cr-Zr alloy - Google Patents
Method for improving performance of titanium alloy by doping Y with Ti-5Al-5Mo-5V-3Cr-Zr alloy Download PDFInfo
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- CN113927031B CN113927031B CN202111209681.9A CN202111209681A CN113927031B CN 113927031 B CN113927031 B CN 113927031B CN 202111209681 A CN202111209681 A CN 202111209681A CN 113927031 B CN113927031 B CN 113927031B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 35
- 229910001093 Zr alloy Inorganic materials 0.000 title claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 45
- 239000000956 alloy Substances 0.000 claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 36
- 238000005245 sintering Methods 0.000 claims abstract description 28
- 238000000498 ball milling Methods 0.000 claims abstract description 27
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 11
- 238000011049 filling Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 abstract description 9
- 238000002490 spark plasma sintering Methods 0.000 description 18
- 238000005242 forging Methods 0.000 description 4
- 238000011534 incubation Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 229910001040 Beta-titanium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007088 Archimedes method Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
- C22C1/0458—Alloys based on titanium, zirconium or hafnium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
- B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The application discloses a method for improving the performance of a titanium alloy by doping Y with Ti-5Al-5Mo-5V-3Cr-Zr alloy, a part of the Ti-5Al-5Mo-5V-3Cr-Zr alloy and an aircraft, comprising the following steps: (1) taking Ti-55531 alloy powder and yttrium powder; (2) ball milling Ti-55531 alloy powder and yttrium powder in a ball mill to obtain mixed alloy powder after ball milling, wherein the doping amount of yttrium is 0 to 2wt%; (3) and filling the ball-milled mixed alloy powder into a die, and then placing the die into SPS sintering for molding. The density of the titanium alloy reaches 99.98%, the tensile strength is 1200MPa, and the elongation is 7.6%.
Description
Technical Field
The application relates to a method for improving the performance of a titanium alloy by doping Y with a Ti-5Al-5Mo-5V-3Cr-Zr alloy, a part of the Ti-5Al-5Mo-5V-3Cr-Zr alloy and an aircraft.
Background
Ti55531 is a novel near-beta titanium alloy which is jointly developed by an air bus company and Russian on the basis of BT22 titanium alloy, has the characteristics of high tensile strength, good fracture toughness, large hardenability and the like, is suitable for manufacturing large-scale bearing members with high strength requirements and good weight reduction effect, and has higher application value in the field of aviation, in particular to large-scale aircrafts. Air bus companies have used the connection of the wing to the pylon of a380 ultra large remote wide-body airliner.
However, ti55531 cannot directly achieve reasonable strength and plasticity adaptation in conventional forging forming, and needs to be achieved through a long-time heat treatment process.
Content of the application
Based on the problems, the comprehensive mechanical property of the titanium alloy is improved by doping Y in the Ti-55531 titanium alloy, and the problems that the Ti55531 alloy has multiple steps (multiple heat treatments are needed after forging) and long consumption time (the forging heat treatment time can reach tens of hours) in the traditional forging forming process are solved.
The technical proposal is as follows: a method for improving the performance of a titanium alloy by doping Y with an SPS prepared Ti-5Al-5Mo-5V-3Cr-Zr alloy comprises the following steps:
(1) taking Ti-55531 alloy powder and yttrium powder;
(2) ball milling Ti-55531 alloy powder and yttrium powder in a ball mill to obtain mixed alloy powder after ball milling, wherein the doping amount of yttrium is 0 to 2wt%;
(3) and filling the ball-milled mixed alloy powder into a die, and then placing the die into SPS sintering for molding.
In one or more specific embodiments of the present application, the ball milling process is: intermittently rotating at 100-500rpm for 10-50 hr.
In one or more specific embodiments of the present application, the SPS sintering process is: heating to 1000-1500deg.C, maintaining the temperature for 5-20min, cooling to 900-600deg.C, maintaining the temperature for 10-70min, and sintering at 20-100Mpa.
In one or more specific embodiments of the present application, the 0.2wt% or less yttrium doping amount or less than 1wt%.
The Y is added to segregate in the beta grain boundary and pin the grain boundary, so that the beta grain after being doped with the Y becomes smaller, the strength is improved, meanwhile, the Y is added to enable alpha to break the grain boundary alpha, the precipitation of alpha is promoted, the alpha is equiaxed, and the comprehensive mechanical property of the alloy is effectively improved. Equiaxed grain and discontinuous grain boundaries can improve the elongation but reduce certain strength, but the intragranular precipitation fully improves the strength, so that the elongation is not reduced much while the strength is improved, and the SPS sintering in-situ heat treatment molding time is short.
In one or more specific embodiments of the present application, the Ti-55531 alloy powder has a particle size of 100-150 μm.
In a second aspect, the present application also provides a part of a Ti-5Al-5Mo-5V-3Cr-Zr alloy.
The technical proposal is as follows: the Ti-5Al-5Mo-5V-3Cr-Zr alloy part is prepared by the method for improving the performance of the titanium alloy by doping Y into the Ti-5Al-5Mo-5V-3Cr-Zr alloy.
In a third aspect, the present application also provides an aircraft.
The technical proposal is as follows: an aircraft comprising a component of the Ti-5Al-5Mo-5V-3Cr-Zr alloy described above.
In one or more specific embodiments of the present application, the aircraft is an aircraft.
Application principle and beneficial effect:
the inventor of the application achieves the effect of one-time rapid forming by adjusting sintering parameters of SPS (spark plasma sintering) and doping of Y. The properties of titanium alloys are closely related to the microstructure characteristics. In near-beta titanium alloys, the alpha phase is the predominant strengthening phase and its morphology, size and content have a great impact on the macroscopic mechanical properties of the alloy.
The method comprises the steps of performing SPS sintering molding after ball milling of the Ti-55531 alloy powder doped with Y powder, performing in-situ heat treatment by utilizing SPS technology sintering molding. The doping of Y can improve the precipitation of alpha in the crystal by Ti-55531, break the alpha in the crystal boundary, lead the alpha to be equiaxed and effectively improve the comprehensive mechanical property. After sintering, it was surprisingly found that the sintered alloy block reached 99.98% density, a tensile strength of 1200MPa and an elongation of 7.6%.
Drawings
FIG. 1 is a microscopic view of a titanium alloy block C;
fig. 2 is a microscopic view of a titanium alloy block D.
Detailed Description
The present application will be further described with reference to the accompanying drawings.
A method for improving the performance of a titanium alloy by doping Y with a Ti-5Al-5Mo-5V-3Cr-Zr alloy comprises the following steps:
(1) taking Ti-55531 alloy powder and yttrium powder.
(2) And ball milling the Ti-55531 alloy powder and the yttrium powder in a ball mill to obtain mixed alloy powder after ball milling, wherein the doping amount of the yttrium is 0 to 2 weight percent.
(3) And filling the ball-milled mixed alloy powder into a die, and then placing the die into SPS sintering for molding.
In one or more specific embodiments of the present application, the ball milling process is: intermittently rotating at 100-500rpm for 10-50 hr.
In one or more specific embodiments of the present application, the SPS sintering process is: heating to 1000-1500deg.C, maintaining the temperature for 5-20min, cooling to 900-600deg.C, maintaining the temperature for 10-70min, and sintering at 20-100Mpa.
In one or more specific embodiments of the present application, the 0.2wt% or less yttrium doping amount or less than 1wt%.
The invention further provides a part of the Ti-5Al-5Mo-5V-3Cr-Zr alloy, which is prepared by the method for improving the performance of the titanium alloy by doping Y with the Ti-5Al-5Mo-5V-3Cr-Zr alloy.
Based on the Ti-5Al-5Mo-5V-3Cr-Zr alloy part, the application also provides an aircraft, which comprises the Ti-5Al-5Mo-5V-3Cr-Zr alloy part.
In one or more specific embodiments of the present application, the aircraft may be an aircraft, but may also be other aircraft.
Example 1
A method for preparing a Ti-55531 alloy block, comprising the steps of:
(1) taking Ti-55531 alloy powder of 100-150 mu m and yttrium powder.
(2) And (3) putting the Ti-55531 alloy powder and the yttrium powder into an omnibearing planetary ball mill for mechanical ball milling and uniformly mixing, wherein the ball milling process is 300rpm biphase rotation, 1 minute is stopped every 3 minutes, and the ball milling time is 30 hours. The yttrium content (doping amount) in the mixed alloy powder after ball milling was 0.2wt%.
(3) And filling the ball-milled mixed alloy powder into a die, and then placing the die into SPS sintering for molding. SPS sintering process: the temperature was raised from room temperature to 1300℃at a rate of 100℃per minute and then incubated for 10 minutes, followed by a decrease in temperature from 1300℃to 750℃at a rate of 100/min and incubation for 50 minutes. The pressure of the whole sintering process is 80Mpa.
Example 2
A method for preparing a Ti-55531 alloy block, comprising the steps of:
(1) taking Ti-55531 alloy powder of 100-150 mu m and yttrium powder.
(2) And (3) putting the Ti-55531 alloy powder and the yttrium powder into an omnibearing planetary ball mill for mechanical ball milling and uniformly mixing, wherein the ball milling process is 300rpm biphase rotation, 1 minute is stopped every 3 minutes, and the ball milling time is 30 hours. The yttrium content in the mixed alloy powder after ball milling is 0.5wt%.
(3) And filling the ball-milled mixed alloy powder into a die, and then placing the die into SPS sintering for molding. SPS sintering process: the temperature was raised from room temperature to 1300℃at a rate of 100℃per minute and then incubated for 10 minutes, followed by a decrease in temperature from 1300℃to 750℃at a rate of 100/min and incubation for 50 minutes. The pressure of the whole sintering process is 80Mpa.
Example 3
A method for preparing a Ti-55531 alloy block, comprising the steps of:
(1) taking Ti-55531 alloy powder of 100-150 mu m and yttrium powder.
(2) And (3) putting the Ti-55531 alloy powder and the yttrium powder into an omnibearing planetary ball mill for mechanical ball milling and uniformly mixing, wherein the ball milling process is 300rpm biphase rotation, 1 minute is stopped every 3 minutes, and the ball milling time is 30 hours. The yttrium content in the mixed alloy powder after ball milling is 1wt%.
(3) And filling the ball-milled mixed alloy powder into a die, and then placing the die into SPS sintering for molding. SPS sintering process: the temperature was raised from room temperature to 1300℃at a rate of 100℃per minute and then incubated for 10 minutes, followed by a decrease in temperature from 1300℃to 750℃at a rate of 100/min and incubation for 50 minutes. The pressure of the whole sintering process is 80Mpa.
Comparative example 1
(1) Taking Ti-55531 alloy powder of 100-150 mu m.
(2) Putting Ti-55531 alloy powder into an omnibearing planetary ball mill, mechanically ball-milling and uniformly mixing, wherein the ball-milling process is 300rpm biphase rotation, stopping for 1 minute every 3 minutes, and the ball-milling time is 30 hours.
(3) And filling the ball-milled Ti-55531 alloy powder into a die, and then placing the die into SPS for sintering and forming to form the titanium alloy block D. SPS sintering process: the temperature was raised from room temperature to 1300℃at a rate of 100℃per minute and then incubated for 10 minutes, followed by a decrease in temperature from 1300℃to 750℃at a rate of 100/min and incubation for 50 minutes. The pressure of the whole sintering process is 80Mpa.
Example 4
The scanning electron microscope microscopic view of the titanium alloy block C is shown in figure 1, and the scanning electron microscope microscopic view of the titanium alloy block D is shown in figure 2. In fig. 1, the white small points are yttrium metal, and the addition of Y leads alpha to be equal to be axially, and meanwhile, the crystal boundary alpha is broken, so that the comprehensive mechanical property of the alloy is effectively improved.
Example 5
And respectively carrying out performance test on the titanium alloy blocks A-D, wherein the density of the titanium alloy blocks A-C is not less than 99.98% (Archimedes method test). The tensile strength and elongation of the titanium alloy blocks A-D are shown in Table 1 below. In table 1, a refers to titanium alloy block a, B refers to titanium alloy block B, C refers to titanium alloy block C, and D refers to titanium alloy block D.
TABLE 1
As can be seen from table 1:
the tensile strength of the titanium alloy block A is 1180MPa, and the elongation is 6%.
The tensile strength of the titanium alloy block B is 1150MPa, and the elongation is 7%.
The tensile strength of the titanium alloy block C is 1128MPa, and the elongation is 7.8%.
The tensile strength of the titanium alloy block D was 890MPa and the elongation was 8.9%.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (8)
1. A method for improving the performance of a titanium alloy by doping Y with a Ti-5Al-5Mo-5V-3Cr-Zr alloy comprises the following steps:
(1) taking Ti-55531 alloy powder and yttrium powder;
(2) ball milling Ti-55531 alloy powder and yttrium powder in a ball mill to obtain mixed alloy powder after ball milling, wherein the doping amount of yttrium is 0 to 2wt%;
(3) filling the ball-milled mixed alloy powder into a die, and then placing the die into SPS (sintering process) for sintering and forming to form Ti-5Al-5Mo-5V-3Cr-Zr alloy; the SPS sintering process comprises the following steps: heating to 1000-1500deg.C, maintaining the temperature for 5-20min, cooling to 900-600deg.C, maintaining the temperature for 10-70min, and sintering at 20-100Mpa.
2. The method for improving the performance of the titanium alloy by doping Y with the Ti-5Al-5Mo-5V-3Cr-Zr alloy according to claim 1, wherein the ball milling process is as follows: intermittently rotating at 100-500rpm for 10-50 hr.
3. The method for improving the performance of a titanium alloy by doping Y with a Ti-5Al-5Mo-5V-3Cr-Zr alloy according to any one of claims 1-2, wherein the doping amount of yttrium is 0.2. 0.2wt% or less and 1. 1wt%.
4. The method for improving the performance of a titanium alloy by doping Y with Ti-5Al-5Mo-5V-3Cr-Zr alloy according to any one of claims 1 to 2, wherein the grain size of the Ti-55531 alloy powder is 100 to 150 μm.
5. The method for improving the performance of a titanium alloy by doping Y with Ti-5Al-5Mo-5V-3Cr-Zr alloy according to claim 3, wherein the grain size of the Ti-55531 alloy powder is 100-150 μm.
6. The part of the Ti-5Al-5Mo-5V-3Cr-Zr alloy is characterized in that the part of the Ti-5Al-5Mo-5V-3Cr-Zr alloy is prepared by the method for improving the performance of the titanium alloy by doping Y into the Ti-5Al-5Mo-5V-3Cr-Zr alloy according to any one of claims 1 to 5.
7. An aircraft comprising the Ti-5Al-5Mo-5V-3Cr-Zr alloy part according to claim 6.
8. The aircraft of claim 7, wherein the aircraft is an aircraft.
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| CN100465309C (en) * | 2006-09-22 | 2009-03-04 | 北京科技大学 | Method for preparing alloy material of high niobium-titanium-aluminum by discharging plasma agglomeration |
| US9212409B2 (en) * | 2012-01-18 | 2015-12-15 | Cook Medical Technologies Llc | Mixture of powders for preparing a sintered nickel-titanium-rare earth metal (Ni-Ti-RE) alloy |
| CN104404305A (en) * | 2014-12-22 | 2015-03-11 | 西北有色金属研究院 | Yttrium-modified TB2 titanium alloy |
| CN104550956A (en) * | 2015-01-20 | 2015-04-29 | 哈尔滨工业大学 | Component preparation method through beta-gamma titanium-aluminum alloy prealloy powder spark plasma sintering |
| EP3612660B1 (en) * | 2017-04-21 | 2022-04-13 | Oerlikon Surface Solutions AG, Pfäffikon | Pvd bond coat |
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| CN111826538B (en) * | 2020-07-28 | 2023-01-24 | 成都露思特新材料科技有限公司 | Preparation method of titanium alloy with bimodal structure and titanium alloy with bimodal structure |
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