CN107190222A - A kind of titanium alloy blade residual stress shot-peening electromagnetic field is combined regulation and control method - Google Patents
A kind of titanium alloy blade residual stress shot-peening electromagnetic field is combined regulation and control method Download PDFInfo
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- CN107190222A CN107190222A CN201710391575.4A CN201710391575A CN107190222A CN 107190222 A CN107190222 A CN 107190222A CN 201710391575 A CN201710391575 A CN 201710391575A CN 107190222 A CN107190222 A CN 107190222A
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- titanium alloy
- alloy blade
- electromagnetic field
- peening
- shot
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Classifications
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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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- 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
- C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons
Abstract
Regulation and control method is combined the invention discloses a kind of titanium alloy blade residual stress shot-peening electromagnetic field, is comprised the following steps：Bead first is carried out to titanium alloy blade, its surface is produced plastic deformation, chilling layer and residual compressive stress is formed；Electromagnetic field regulation and control processing is carried out to the titanium alloy blade after bead at normal temperatures again, processing time is 3~600s, the electromagnetic field is coupled to form by alternating magnetic field and impulse electric field, the intensity of alternating magnetic field is 500~30000A/m, the frequency of alternating magnetic field is 1~1000Hz, the peak inrush current of impulse electric field is 5~20000A, and the pulse period of impulse electric field is 0.01~1.0s.The present invention increases electromagnetic field modulation process on the basis of traditional shot-blast process, is distributed using electromagnetic field controlled material top layer and nearly surface residual stress, extends part service life.
Description
Technical field
The invention belongs to titanium alloy blade technical field of surface, and in particular to a kind of titanium alloy blade residual stress spray
Ball-electromagnetic field is combined regulation and control method.
Background technology
Titanium alloy blade is the key member of aero-engine, has decisive shadow to aero-engine performance and life-span
Ring.Titanium alloy blade under arms during bear the load such as high temperature, vibration, pneumatic, centrifugal force, rigorous service condition, it is organized
State and residual stress distribution require very strict.Once leaf destruction failure will cause aero-engine to be stopped, and then lead
Aircraft is caused catastrophic failure occur.
Titanium alloy blade surface and the residual stress distribution of near surface, directly influence the service behaviour of blade and are on active service the longevity
Life.In titanium alloy blade manufacture, traditional handicraft needs to regulate and control the residual stress distribution of surface and near surface by shot-peening.In shot-peening
In technique, surface and near surface grain structure on the one hand can be effectively refined, while producing residual compressive stress, this is to blade
Performance and life-span are favourable；On the other hand, shot-peening can cause surface damage and micro-crack again, with induced damage resistive Blade Properties and longevity
Life, even results in blade rejection when serious.So the residual stress regulation and control new method of development titanium alloy blade surface and near surface,
The shortcoming of blade shot peening strengthening is overcome, as vane manufacturing global problem urgently to be resolved hurrily.
Using electromagnetic field controlled material residual stress distribution, extension part service life is a kind of new technology, is had
High treating effect, time is short, without additional deformation the advantages of.At present, the electromagnetic field control technique on residual stress is existing
Document report, but regulation and control object almost all is for ferrimagnets such as steels, and on being particularly for nonferromugnetic material
Titanium alloy, the report regulated and controled using electromagnetic field but there is not yet.
The content of the invention
To eliminate shortcoming of the shot-blast process to titanium alloy blade surface damage, it is remaining that the present invention provides a kind of titanium alloy blade
Stress shot blasting-electromagnetic field is combined regulation and control method, and it is directed to brand-new titanium alloy blade, on the basis of traditional shot-blast process, increase
Electromagnetic field modulation process, is distributed using electromagnetic field controlled material top layer and nearly surface residual stress, extends part service life.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of titanium alloy blade residual stress shot-peening-electromagnetic field is combined regulation and control method, comprises the following steps：First to titanium alloy
Blade carries out bead, its surface is produced plastic deformation, forms chilling layer and residual compressive stress；Again at normal temperatures to through spray
Titanium alloy blade after ball processing carries out electromagnetic field regulation and control processing, and processing time is 3~600s, and the electromagnetic field is by alternating magnetic field
It is coupled to form with impulse electric field, the intensity of alternating magnetic field is 500~30000A/m, and the frequency of alternating magnetic field is 1~1000Hz, arteries and veins
The peak inrush current for rushing electric field is 5~20000A, and the pulse period of impulse electric field is 0.01~1.0s.
, will a large amount of a diameter of Φ 0.1mm~Φ 1.2mm using compressed air in bead by above-mentioned technical proposal
Bullet it is vertical or spray at a certain angle to titanium alloy blade surface with high speed, pressure is that 0.1~2.0MPa, flow are
1~30kg.min-1。
By above-mentioned technical proposal, the alternating current that the alternating magnetic field is exported by power supply is in containing cored magnet exciting coil
Produce.
By above-mentioned technical proposal, the impulse electric field is exported the Pulse Electric Current with High Density of specific period by the pulse power, and
Periodicity electric field is produced inside processed material.
By above-mentioned technical proposal, the titanium alloy blade is made by precision forging, hot investment casting or numerical control processing technology.
The present invention, has the advantages that：The present invention first carries out bead to titanium alloy blade, after bead
Titanium alloy blade surface metal crystal be plastically deformed, the crystal defect such as dislocation, room increase, cause distortion of lattice, change
Become the ordered state of original lattice atoms, internal material Energy distribution is uneven, cause top layer and nearly top layer to produce residual pressure
Stress state；Then electromagnetic field regulation and control processing is carried out to the titanium alloy blade after bead again, once apply outer energy field, it is brilliant
The high-energy regions such as boundary, sub boundary are under the superposition of outer energy field energy, it will more than the transition energy of microcell phase transformation, enter
And precipitation secondary phase particle is undergone phase transition, change the form generation of matrix phase (α phases), and play strong pinning dislocation and sub- knot
The effect of structure, hinders the motion and crystal boundary, sub boundary migration of dislocation, causes compression integrally to raise.
In the present invention, due to the titanium alloy blade internal energy distribution Jing Guo bead and uneven, locally occur the
Secondary phase particle is separated out also to be differed with the probability of α phases deformity, then passes through application external electromagnetic field so that inside titanium alloy blade
Energy is higher and internal stress also higher microcell is undergone phase transition, the higher internal stress in release part, and then make to a certain extent
Residual compressive stress uniformity gets a promotion.The present invention can dramatically increase the nearly top layer of titanium alloy blade and bearing stress, and
Make the distribution of titanium alloy blade surface compress residual stresses more uniform, eliminate micro- damage that shot-blast process is caused to titanium alloy blade surface
Wound and defect, can be substantially improved titanium alloy blade fatigue strength, extend the fatigue life of titanium alloy blade.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 a are the schematic diagrames of titanium alloy blade leaf basin (part) in the embodiment of the present invention.
Fig. 1 b are the schematic diagrames of titanium alloy blade blade back (part) in the embodiment of the present invention.
Fig. 2 is the schematic diagram of titanium alloy blade surface residual stress test result in the embodiment of the present invention.
Fig. 3 is the schematic diagram of the residual stress test result that titanium alloy blade is distributed along layer depth in the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
In the preferred embodiment, a kind of titanium alloy blade residual stress shot-peening-electromagnetic field is combined regulation and control method,
Comprise the following steps：Bead first is carried out to titanium alloy blade, its surface is produced plastic deformation, chilling layer and remnants are formed
Compression；Again at normal temperatures to after bead titanium alloy blade carry out electromagnetic field regulation and control processing, processing time be 3~
600s, electromagnetic field is coupled to form by alternating magnetic field and impulse electric field, and the intensity of alternating magnetic field is 500~30000A/m, alternation magnetic
Frequency be 1~1000Hz, the peak inrush current of impulse electric field is 5~20000A, and the pulse period of impulse electric field is
0.01~1.0s.
In a preferred embodiment of the invention, in bead, using compressed air will a large amount of a diameter of Φ 0.1mm~
Φ 1.2mm bullet is vertical or spray at a certain angle to titanium alloy blade surface with high speed, and pressure is 0.1~
2.0MPa, flow are 1~30kg.min-1。
In a preferred embodiment of the invention, the alternating current that alternating magnetic field is exported by power supply is containing cored excitation wire
Produced in circle.
In a preferred embodiment of the invention, impulse electric field is exported the high density pulse electricity of specific period by the pulse power
Stream, and the generation periodicity electric field inside processed material.
In a preferred embodiment of the invention, titanium alloy blade is by precision forging, hot investment casting or numerical control processing technology system
Make.
It is exemplified below three embodiments of the present invention.
Embodiment 1
A kind of titanium alloy blade residual stress shot-peening-electromagnetic field is combined regulation and control method, comprises the following steps：
S1, titanium alloy blade is made using techniques such as precision forging, digital control processings；
S2, to brand-new titanium alloy blade surface carry out bead：Shot-blast process parameter is：With the perpendicular angle of blade surface
Shot blasting, a diameter of Φ 0.1mm~Φ 0.5mm of bullet are spent, pressure is 0.1~0.3MPa, and flow is 1~8kg.min-1；
S3, the titanium alloy blade after shot-peening is placed in special electromagnetic field generator at normal temperatures, utilizes electromagnetic field
Titanium alloy blade is handled, electromagnetic field regulation and control processing time is 3~10s, and electromagnetic field is mainly by alternating magnetic field and pulse electricity
Field is coupled to form, and magnetic field main process parameter is 500~5000A/m of magnetic field intensity, 1~20Hz of frequency, and electric field is mainly located
Reason technological parameter be 5~500A of peak inrush current, pulse period be 0.01~0.08s.
Using X-ray diffraction method to titanium alloy blade carry out surface residual stress test, test point arrangement such as Fig. 1 a,
Arrange that 5 test points of arrangement (are marked in figure on 3 test points (mark 1,2,3 in figure), blade back shown in Fig. 1 b, on its middle period basin
1、2、3、4、5).The residual stress components of stress along specimen length and width are respectively tested for all test points.Remove
Outside this, electrobrightening delamination, the regularity of distribution of the test residual stress along layer depth direction are used for blade back test point 2.
Three groups of the present invention point is tested, and the 1st group is the titanium alloy blade before brand-new titanium alloy blade, i.e. shot-peening, the 1st group
For the titanium alloy blade after bead, the 3rd group is the titanium alloy blade after shot-peening and electromagnetic field Combined Processing.Remnants should
Power test result is as shown in Figure 2 and Figure 3, it can be seen that compared with the residual stress of brand-new titanium alloy blade, by shot-blast process
After processing, titanium alloy blade surface compress residual stresses increase about 41%~73%, but residual compressive stress distributing homogeneity substantially becomes
Difference, mean square deviation maximum 63MPa；Blade residual compressive stress is rapid after 20 μm of layer depth from surface along the first slow reduction of layer depth direction
Reduction；Compared with residual compressive stress distribution after shot-peening, titanium alloy blade is remaining after being combined modulation process processing through shot-peening-electromagnetic field
Compression has a certain degree of lifting, and maximum lift amplitude is 7.7%, while eliminating the stress distribution that shot-blast process is caused
Uneven result, compared with the residual compressive stress after shot-blast process processing, blade forms stronger along layer depth direction Shang Jin top layers
Residual compressive stress field, wherein 1.5 times of the interval residual compressive stress maximum lift of 35~65 μm of layer depth.
Using blade fatigue strength test bed frame, test after shot-peening and shot-peening-electromagnetic field is combined after regulation and control processing
Blade fatigue is by stress, and test result is as shown in table 1.Compared with titanium alloy blade fatigue strength after shot-peening, shot-peening-electricity is utilized
Titanium alloy blade fatigue strength lifting about 33%~36% after the combination process regulation and control residual stress of magnetic field.
1 shot-peening of table-electromagnetic field is combined influence of the modulation process to blade fatigue failure intensity
| Titanium alloy blade state | Minimum failure intensity (MPa) | Maximum failure intensity (MPa) |
| After shot-blast process regulation and control | 450 | 550 |
| After the compound regulation and control of shot-peening-electromagnetic field | 600 | 750 |
Embodiment 2
A kind of titanium alloy blade residual stress shot-peening-electromagnetic field is combined regulation and control method, comprises the following steps：
S1, titanium alloy blade is made using techniques such as precision forging, digital control processings；
S2, to brand-new titanium alloy blade surface carry out bead：Shot-blast process parameter is：With blade surface in 80~
85 ° of angle shot blastings, a diameter of Φ 0.4mm~Φ 0.8mm of bullet, pressure be 0.8~1.2MPa, flow be 5~
15kg.min-1；
S3, the titanium alloy blade after shot-peening is placed in special electromagnetic field generator at normal temperatures, utilizes electromagnetic field
Regulation and control processing is carried out to blade, electromagnetic field regulation and control processing time is 100~160s, and electromagnetic field is mainly by alternating magnetic field and pulse electricity
Field is coupled to form, and magnetic field main process parameter is 10000~15000A/m of magnetic field intensity, 40~50Hz of frequency, electric field master
Want handling process parameter be 8000~120000A of peak inrush current, pulse period be 0.45~0.75s.
Surface residual stress test is carried out to blade using X-ray diffraction method, test point arrangement and method of testing with
Embodiment 1 is identical.Compared with brand-new leaf surface residual stress, modulation process processing rear blade is combined through shot-peening-electromagnetic field residual
Overbottom pressure stress improves 17%-60%, and residual stress mean square deviation reduces 24MPa, that is, eliminate that shot-blast process causes should
Power skewness result；Blade forms stronger residual compressive stress field, wherein layer depth along layer depth direction Shang Jin top layers simultaneously
15~35 μm of region residual compressive stress after shot-peening compared with improving 76%.Using blade fatigue strength test bed frame, test in spray
It is combined the blade fatigue after regulation and control are handled with shot-peening-electromagnetic field after ball and passes through stress.Compared with shot-peening rear blade fatigue strength, profit
With shot-peening-electromagnetic field combination process regulation and control residual stress rear blade fatigue strength lifting about 9%~11%.
Embodiment 3
A kind of titanium alloy blade residual stress shot-peening-electromagnetic field is combined regulation and control method, comprises the following steps：
S1, titanium alloy blade is made using techniques such as precision forging, digital control processings；
In S2, shot-blast process, titanium alloy material surface is carried out using bullet：Shot-blast process parameter is：With blade surface
In 60~75 ° of angle shot blastings, a diameter of Φ 0.8mm~Φ 1.2mm of bullet, pressure is 1.8~2.0MPa, and flow is
25~30kg.min-1；
S3, the titanium alloy blade after shot-peening is placed in special electromagnetic field generator at normal temperatures, utilizes electromagnetic field
Blade is handled, processing time be 500~600s, magnetic field main process parameter be magnetic field intensity 25000~
30000A/m, 800~1000Hz of frequency, electric field main process parameter are 18000~20000A of peak inrush current, pulse
Cycle is 0.8~1.0s.
Surface residual stress test is carried out to blade using X-ray diffraction method, test point arrangement and method of testing with
Embodiment 1 is identical.Compared with brand-new leaf surface residual stress, modulation process processing rear blade is combined through shot-peening-electromagnetic field residual
Overbottom pressure stress improves 17%-60%, and residual stress mean square deviation reduces 24MPa, that is, eliminates the stress that shot-blast process is caused
Skewness result；Blade forms stronger residual compressive stress field, wherein layer depth 15 along layer depth direction Shang Jin top layers simultaneously
~35 μm of region residual compressive stress after shot-peening compared with improving 90%.Using blade fatigue strength test bed frame, test in shot-peening
The blade fatigue after regulation and control processing is combined with shot-peening-electromagnetic field afterwards and passes through stress.Compared with shot-peening rear blade fatigue strength, utilize
Shot-peening-electromagnetic field combination process regulation and control residual stress rear blade fatigue strength lifting about 43%~45%.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (5)
1. a kind of titanium alloy blade residual stress shot-peening-electromagnetic field is combined regulation and control method, it is characterised in that comprise the following steps：
Bead first is carried out to titanium alloy blade, its surface is produced plastic deformation, chilling layer and residual compressive stress is formed；Again normal
Electromagnetic field regulation and control processing is carried out under temperature to the titanium alloy blade after bead, processing time is 3~600s, the electromagnetic field
It is coupled to form by alternating magnetic field and impulse electric field, the intensity of alternating magnetic field is 500~30000A/m, and the frequency of alternating magnetic field is 1
~1000Hz, the peak inrush current of impulse electric field is 5~20000A, and the pulse period of impulse electric field is 0.01~1.0s.
2. titanium alloy blade residual stress shot-peening-electromagnetic field according to claim 1 is combined regulation and control method, its feature exists
In, in bead, using compressed air by a large amount of a diameter of Φ 0.1mm~Φ 1.2mm bullet with high speed to titanium alloy
Blade surface is vertical or sprays at a certain angle, and pressure is that 0.1~2.0MPa, flow are 1~30kg.min-1。
3. titanium alloy blade residual stress shot-peening-electromagnetic field according to claim 1 is combined regulation and control method, its feature exists
In the alternating current that the alternating magnetic field is exported by power supply is produced in containing cored magnet exciting coil.
4. titanium alloy blade residual stress shot-peening-electromagnetic field according to claim 1 is combined regulation and control method, its feature exists
In the impulse electric field is exported the Pulse Electric Current with High Density of specific period by the pulse power, and is produced inside processed material
Periodicity electric field.
5. titanium alloy blade residual stress shot-peening-electromagnetic field according to claim 1 is combined regulation and control method, its feature exists
In the titanium alloy blade is made by precision forging, hot investment casting or numerical control processing technology.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614418A (en) * | 2018-03-27 | 2018-10-02 | 西北工业大学 | Titanium alloy milling-polishing-shot peening strengthening residual stress field process control method |
| CN110722460A (en) * | 2019-10-18 | 2020-01-24 | 广州大学 | Electromagnetic reinforced grinding equipment for processing surface of metal plate |
| CN111855717A (en) * | 2020-05-29 | 2020-10-30 | 中国人民解放军陆军装甲兵学院 | Method for analyzing influence of pulsed magnetic field treatment on residual stress of metal part |
| CN112935256A (en) * | 2021-01-26 | 2021-06-11 | 四川大学 | Method for modifying non-ferromagnetic powder sintered metal parts based on pulsed magnetic field |
| CN113305743A (en) * | 2021-05-06 | 2021-08-27 | 武汉理工大学 | Micro-nano targeted repairing device and method for electromagnetic composite field of inner ring of aeroengine bearing |
| CN113667915A (en) * | 2021-07-27 | 2021-11-19 | 四川大学 | Treatment method for improving fatigue life of titanium alloy by using pulsed magnetic field treatment |
| CN114032382A (en) * | 2021-11-10 | 2022-02-11 | 中国航发北京航空材料研究院 | Equipment for strengthening titanium alloy plate by pulse magnetic field |
| CN115287414A (en) * | 2022-07-20 | 2022-11-04 | 武汉理工大学 | In-situ regulation and control technical device and method for electromagnetic composite field of aircraft titanium alloy blade material |
| CN115896660A (en) * | 2022-10-26 | 2023-04-04 | 中国航发北京航空材料研究院 | Titanium alloy strengthening device and method in planar intersection system in pulse magnetic field |
| CN116695043A (en) * | 2023-05-31 | 2023-09-05 | 武汉理工大学 | Electromagnetic impact technical method for improving stress fatigue performance of titanium alloy |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614418A (en) * | 2018-03-27 | 2018-10-02 | 西北工业大学 | Titanium alloy milling-polishing-shot peening strengthening residual stress field process control method |
| CN110722460A (en) * | 2019-10-18 | 2020-01-24 | 广州大学 | Electromagnetic reinforced grinding equipment for processing surface of metal plate |
| CN111855717B (en) * | 2020-05-29 | 2023-12-29 | 中国人民解放军陆军装甲兵学院 | Analysis method for influence of pulsed magnetic field treatment on residual stress of metal part |
| CN111855717A (en) * | 2020-05-29 | 2020-10-30 | 中国人民解放军陆军装甲兵学院 | Method for analyzing influence of pulsed magnetic field treatment on residual stress of metal part |
| CN112935256A (en) * | 2021-01-26 | 2021-06-11 | 四川大学 | Method for modifying non-ferromagnetic powder sintered metal parts based on pulsed magnetic field |
| CN112935256B (en) * | 2021-01-26 | 2023-02-17 | 成都昆吾科技有限公司 | Method for modifying non-ferromagnetic powder sintered metal parts based on pulsed magnetic field |
| CN113305743A (en) * | 2021-05-06 | 2021-08-27 | 武汉理工大学 | Micro-nano targeted repairing device and method for electromagnetic composite field of inner ring of aeroengine bearing |
| CN113305743B (en) * | 2021-05-06 | 2022-03-11 | 武汉理工大学 | Micro-nano targeted repairing device and method for electromagnetic composite field of inner ring of aeroengine bearing |
| CN113667915A (en) * | 2021-07-27 | 2021-11-19 | 四川大学 | Treatment method for improving fatigue life of titanium alloy by using pulsed magnetic field treatment |
| CN114032382A (en) * | 2021-11-10 | 2022-02-11 | 中国航发北京航空材料研究院 | Equipment for strengthening titanium alloy plate by pulse magnetic field |
| CN114032382B (en) * | 2021-11-10 | 2023-01-13 | 中国航发北京航空材料研究院 | Equipment for strengthening titanium alloy plate by pulse magnetic field |
| CN115287414A (en) * | 2022-07-20 | 2022-11-04 | 武汉理工大学 | In-situ regulation and control technical device and method for electromagnetic composite field of aircraft titanium alloy blade material |
| CN115287414B (en) * | 2022-07-20 | 2024-01-30 | 武汉理工大学 | Electromagnetic composite field in-situ regulation and control technical device and method for aeronautical titanium alloy blade material |
| CN115896660A (en) * | 2022-10-26 | 2023-04-04 | 中国航发北京航空材料研究院 | Titanium alloy strengthening device and method in planar intersection system in pulse magnetic field |
| CN115896660B (en) * | 2022-10-26 | 2024-02-13 | 中国航发北京航空材料研究院 | Titanium alloy strengthening device and method in plane convergence system in pulsed magnetic field |
| CN116695043A (en) * | 2023-05-31 | 2023-09-05 | 武汉理工大学 | Electromagnetic impact technical method for improving stress fatigue performance of titanium alloy |
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Application publication date: 20170922 |