CN108546949A - A kind of titanium alloy ontology coating production based on electric spark deposition - Google Patents
A kind of titanium alloy ontology coating production based on electric spark deposition Download PDFInfo
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- CN108546949A CN108546949A CN201810255947.5A CN201810255947A CN108546949A CN 108546949 A CN108546949 A CN 108546949A CN 201810255947 A CN201810255947 A CN 201810255947A CN 108546949 A CN108546949 A CN 108546949A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
- C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
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Abstract
The invention discloses a kind of titanium alloy ontology coating production based on electric spark deposition, the method are：It uses titanium alloy material for matrix, uses titanium alloy identical with basis material model for electrode, deposit to form titanium alloy ontology coating on titanium alloy substrate surface using electric spark deposition mode.Depositing operation function admirable of the present invention, coating and the base material of preparation are in metallurgical binding, and interface cohesion is good, and coating structure is fine and close, increases the diversity of titanic alloy machining technology, improves production efficiency, has very strong practical value.
Description
Technical field
The present invention relates to the preparation fields of metal coating, more particularly to a kind of electric spark for the manufacture of titanium alloy coating
Deposition method.
Background technology
Titanium has many advantages, such as specific strength height, corrosion resistance excellent, good biocompatibility, in aerospace, weaponry
And civilian industry field has a wide range of applications.The especially ideal manufacture material of aircraft and engine, such as F-15 fighter planes
Titanium alloy dosage account for about the 26.5% of entire aero-structure weight, the titanium alloy dosage in Boeing-747 airliner reaches
5.5%.
However, due to the poor machinability of titanium alloy, its application is largely constrained for a long time.Performance
Going out the main reason for machinability is poor has：1. poor thermal conductivity causes cutting temperature very high, reduces tool life.②
When 600 DEG C of temperatures above, titanium alloy surface is easy to form oxidation hard formation, there is strong abrasive action to cutter.3. plasticity is low, hard
Degree is high, and the angle of shear is made to increase, and chip and rake face contact length very little, rake face upper stress is very big, and breakage easily occurs for blade.④
Elasticity modulus is low, and flexible deformation is big, and workpiece surface springback capacity is big close at flank, so machined surface and flank connect
Contacting surface product is big, serious wear.These features during titanium alloy cutting make its processing become very difficult, lead to processing efficiency
Low, cutter consumption is big.Other than the machinability of titanium alloy is poor, the drilling processing of titanium alloy is also relatively difficult, often
Occur burning knife and breaking of rod phenomenon in process.
For these reasons, the present invention uses electric spark deposition technology machining titanium alloy, and electric spark deposition (ESD) is one
Plant simple for process and cost-effective technology.It is to store high energy electric energy using capacitor, then at metal electrode (anode)
High energy electric energy is discharged to high-frequency between metallic matrix (cathode), air or working media is caused ionization to occur and in electrode material
Discharge channel is formed between material and workpiece.This electric discharge can generate a small, high temperature and pressure region in workpiece surface.High temperature
High pressure can be such that electrode material melts and penetrate into workpiece surface, form high rigidity, the metallurgical coating of high abrasion.The technique has heat defeated
Enter many advantages, such as amount is small, equipment is simple, sedimentary bond strength is high and can implement local strengthening to piece surface.
Invention content
Ontology coating is prepared on titanium alloy substrate using electric spark deposition technology the purpose of the present invention is to provide a kind of
Method, increase titanic alloy machining technology diversity.
To achieve the goals above, the technical solution adopted by the present invention is：
A kind of preparation method of the titanium alloy ontology coating based on electric spark deposition, it is characterised in that：Using titanium alloy material
Material is matrix, uses titanium alloy identical with basis material model for electrode, using electric spark deposition mode in titanium alloy substrate
Surface deposits to form titanium alloy ontology coating.
Further, the method is specifically prepared in accordance with the following steps：
(1) respectively using titanium alloy as matrix and electrode, with sand paper polishing matrix and electrode surface, surface oxidation is removed
Then film removes surface blot and obtains the matrix of pre-treatment and the electrode of pre-treatment；The material titanium alloy of the matrix, electrode
Model is consistent；
(2) electric spark deposition device is used, the matrix of the pre-treatment obtained by step (1) is fixed on workbench, it will be described
The matrix of pre-treatment is connected with the anode of the electric spark deposition device pulse power, and the electrode of the pre-treatment is fixed on work rifle
On, the work rifle is connected with the cathode of the electric spark deposition device pulse power, under protective gas atmosphere, by institute
State matrix surface of the electrode close to the pre-treatment of pre-treatment, the matrix surface of the electrode of the pre-treatment in the preceding processing
Continuous round-trip rule of making is mobile, and titanium alloy ontology coating is finally formed on the matrix of the preceding processing；The electricity of the pre-treatment
Pole matches with the work rifle.
Further, in step (1), the method for removing surface blot is to be cleaned by ultrasonic base using absolute ethyl alcohol or acetone
Body and electrode.
Further, in step (1), the electrode is in pole shape, and electrode head region of discharge is in coniform；
Further, the cone angle of the electrode head region of discharge is 10~170 °.
Further, in step (1), the titanium alloy is preferably TC4, TC6, TB5, TA15 or TA2.
Further, in step (2), the protective gas is in argon gas, helium, carbon dioxide gas, hydrogen or nitrogen
A kind of or more person mixture, preferably argon gas or nitrogen.
Further, in step (2), the protected mode of the protective gas is that deposition test carries out in sealing system,
Going to for experiment is filled with protective gas in sealing system, and uses oxygen concentration in oxygen analyser real-time monitoring device simultaneously, works as device
When interior oxygen concentration is down to 0.5% or less, electric spark deposition experiment is proceeded by, and remain in device during the test
Oxygen concentration is less than 0.5%.
Further, in step (2), the deposition parameter of the electric spark deposition device is：Output power 100~
5000W, discharge voltage 24-100V, discharge pulse width are 10-1000 μ s.
Further, in step (2), between the electrode of the pre-treatment and the matrix of the pre-treatment there are can make electrode with
Medium between matrix is ionized breakdown (such as protection gas), then between preceding processing electrode and the matrix of the preceding processing
The distance of spark discharge is generated, preferred distance is 0.1~60 μm.
Further, in step (2), the electrode of the pre-treatment remains a constant speed movement as possible, to ensure the quality of sedimentary,
It is preferred that the movement speed is 10~600mm/min.
More specifically, the method for the present invention that titanium alloy ontology coating is prepared based on electric spark deposition technology is whole
Covering experimental provision includes：Protect gas cylinder, work rifle, electric spark deposition device, sealing device, bench vice and oxygen analyser；Described
For pincers for fixing matrix, the bench vice that the sealing device is used to wrap after fixing matrix makes bench vice be closed in airtight, described
The blow vent of protection gas tank is connect with the sealing device, and the oxygen measuring probe of the bench vice oxygen analyser stretches into the sealing
The cathode of device, the electric spark deposition device can be electrically connected with the matrix, the sun of the electric spark deposition device
Pole is electrically connected with the work rifle；The sealing device is equipped with and the work close-fitting work rifle interface of rifle；Described
When electric spark deposition device works, matrix is connect with the anode interface of the electric spark deposition device and by bench vice knob
It is fixed on bench vice, and airtight close of the bench vice is placed in sealing device；The work rifle end is pressed from both sides equipped with work rifle
Electrode is fixed on the work rifle collet by head, and the work rifle and the anode of the electric spark deposition device connect
Mouth connection；The protection gas tank is connect with the sealing device, and the oxygen measuring probe of the oxygen analyser monitors sealing in real time
Oxygen content in device；The work rifle passes through the work rifle interface and the sealing device airtight connection, experiment
When beginning, protective gas tank air valve is opened, protection gas is passed through into sealing device, when the concentration of oxygen is reduced to 0.5%, is opened
It opens and adjusts electric spark deposition device and regulation power adjusting knob and mode tuning knob, open work rifle switch and by work rifle
The one end for being fixed with electrode carries out electric spark deposition experiment close to matrix.
Compared with prior art, beneficial effects of the present invention are：
The present invention forms the ontology coating for the metallurgical binding state that will not fall off in titanium alloy surface, opens titanium alloy
The new way of processing.The ontology that the present invention can require by adjusting the gain of parameter different performance such as electric parameter and sedimentation time
Coating, the manufacturing technology to improving titanium alloy parts have very high practical value.The depositing operation function admirable of the present invention,
The coating of preparation is in metallurgical binding with base material, and interface cohesion is good, and coating structure is fine and close, can the perfect damaged part for repairing test specimen,
Extend the service life of test specimen, there is very strong practical value.
Description of the drawings
Fig. 1 is the representative microstructure figure of the embodiment of the present invention 1；
Fig. 2 is the representative microstructure figure of the embodiment of the present invention 3；
Fig. 3 is the representative microstructure figure of the embodiment of the present invention 5；
Fig. 4 is electric spark deposition experimental rig figure；1 is micro-arc spark precipitation equipment, and 2 be anode interface, and 3 be work rifle,
4 be matrix, and 5 be bench vice knob, and 6 be atmosphere protection glove bag, and 7 be oxygen measuring probe, and 8 be bench vice, and 9 be electrode, and 10 be work rifle
Collet, 11 be cathode interface, and 12 be power regulating knob, and 13 be mode tuning knob, and 14 be air valve, and 15 be to protect gas tank, 16
For oxygen analyser.
Specific implementation mode
Technical scheme of the present invention is made further and illustrated with reference to specific embodiment, not involved by the limitation present invention
And range.Fig. 1 is the representative microstructure figure of TC4 ontologies coating of the present invention；Fig. 2 is the typical case of TA2 ontologies coating of the present invention
Micro-organization chart.In figure：1-coating, 2-matrixes.
The a whole set of experimental provision packet of the method for the present invention that columnar arrays surface is prepared based on electric spark deposition technology
It includes：Protect gas tank 15, work rifle 3, electric spark deposition device 1, atmosphere protection glove bag 6, bench vice 8 and oxygen analyser 16；It is described
For bench vice 8 for fixing matrix, the atmosphere protection glove bag, which is used to wrap the bench vice after fixing matrix, makes bench vice be in airtight
It closes, the blow vent of the protection gas tank 15 is connect with the atmosphere protection glove bag 6, the survey of the bench vice oxygen analyser 16
Oxygen probe stretches into the atmosphere protection glove bag, and the cathode of the electric spark deposition device 1 can be electrically connected with the matrix
It connects, the anode of the electric spark deposition device is electrically connected with the work rifle 3；The atmosphere protection glove bag be equipped with
Work the close-fitting work rifle interface of rifle；When the electric spark deposition device works, matrix 4 and the electric spark are sunk
The cathode interface 11 of product device 1 is connected and is fixed on bench vice 8 by bench vice knob 5, and airtight close of bench vice 8 is placed in
In atmosphere protection glove bag 6；3 end of work rifle is equipped with work rifle collet 10, and electrode 9 is fixed on to the work rifle
On collet 10, the work rifle 3 is connect with the anode interface 2 of the electric spark deposition device 1；The protection gas tank 15
It is connect with the atmosphere protection glove bag 6, the oxygen measuring probe 7 of the oxygen analyser 16 monitors in atmosphere protection glove bag in real time
6 oxygen contents；The work rifle is real by the work rifle interface and 6 airtight connection of atmosphere protection glove bag
When testing beginning, protective gas tank air valve 14 is opened, protection gas is passed through into atmosphere protection glove bag 6, waits for that the concentration of oxygen reduces
When to 0.05%~0.5%, opens and adjust electric spark deposition device 1 and regulation power adjusting knob 12 and mode tuning knob
13, one end that the rifle 3 that works is fixed with to electrode 9 carries out electric spark deposition experiment close to matrix 4.
Embodiment 1：
Basis material uses TC4, electrode material to use TC4.Specific preparation process is as follows：
(1) to the base material for being used for electric spark deposition is polished with the sand paper of 400#, 800#, 1200# step by step successively with electrode,
Then material removal surface film oxide is cleaned by ultrasonic 6min with absolute ethyl alcohol, remove surface blot；
(2) electrode material one end is processed into it is coniform, cone angle be 15 °；
(3) matrix is connected with the anode of the pulse power of 3H-ES-6 type electric spark deposition devices, the electrode circular cone
Bottom end is fixed on work rifle, and the work rifle is connected with the cathode of the electric spark deposition device pulse power；
(4) specific process parameter of unbalanced pulse power supply, deposition is：Output power 500W, discharge voltage 30V, electric discharge
Pulse width is 20 μ s, and deposition test carries out in atmosphere protection glove bag, and going in atmosphere protection glove bag for experiment is filled with
Protective gas argon gas, and oxygen concentration in oxygen analyser real-time monitoring device is used simultaneously so that oxygen concentration controls in obturator
Between 0.04%-0.08%, experiment is proceeded by, by electrode close to matrix surface, the electrode is in the matrix table
It is mobile that rule is continuously made in face, and electrode is remained a constant speed movement with the speed of 100mm/min, sedimentation time 5min.Finally described
Titanium alloy ontology coating is formed on matrix as shown in Figure 1, coating structure even compact, thickness are about 480 μm, no significant defect,
An irregular melt run, the uniform gapless in junction are formd between coating and matrix, coating realizes well with matrix
Metallurgical binding.
Embodiment 2：
Basis material uses TC4, electrode material to use TC4.Specific preparation process is as follows：
(1) to the base material for being used for electric spark deposition is polished with the sand paper of 400#, 800#, 1200# step by step successively with electrode,
Then material removal surface film oxide is cleaned by ultrasonic 6min with absolute ethyl alcohol, remove surface blot；
(2) electrode material one end is processed into it is coniform, cone angle be 30 °；
(3) matrix is connected with the anode of the pulse power of 3H-ES-6 type electric spark deposition devices, the electrode circular cone
Bottom end is fixed on work rifle, and the work rifle is connected with the cathode of the electric spark deposition device pulse power；
(4) specific process parameter of unbalanced pulse power supply, deposition is：Output power 1000W, discharge voltage 45V, puts
Electronic pulse width is 60 μ s, and deposition test carries out in atmosphere protection glove bag, and going in atmosphere protection glove bag for experiment is filled
Enter protective gas argon gas, and use oxygen concentration in oxygen analyser real-time monitoring device simultaneously so that oxygen concentration control in obturator
System proceeds by experiment, by electrode close to matrix surface, the electrode is in the matrix between 0.04%-0.08%
It is mobile that rule is continuously made on surface, and electrode is remained a constant speed movement with the speed of 100mm/min, sedimentation time 5min.Finally described
Matrix on formed titanium alloy ontology coating, coating structure even compact, pattern is substantially same as Example 1, but thickness is not
Together, thickness is about 400 μm, no significant defect, and an irregular melt run is formd between coating and matrix, and junction is equal
Even gapless, coating realize good metallurgical binding with matrix.
Embodiment 3：
Basis material uses TC4, electrode material to use TC4.Specific preparation process is as follows：
(1) to the base material for being used for electric spark deposition is polished with the sand paper of 400#, 800#, 1200# step by step successively with electrode,
Then material removal surface film oxide is cleaned by ultrasonic 6min with absolute ethyl alcohol, remove surface blot；
(2) electrode material one end is processed into it is coniform, cone angle be 50 °；
(3) matrix is connected with the anode of the pulse power of 3H-ES-6 type electric spark deposition devices, the electrode circular cone
Bottom end is fixed on work rifle, and the work rifle is connected with the cathode of the electric spark deposition device pulse power；
(4) specific process parameter of unbalanced pulse power supply, deposition is：Output power 2200W, discharge voltage 60V, puts
Electronic pulse width is 220 μ s, and deposition test carries out in atmosphere protection glove bag, and going in atmosphere protection glove bag for experiment is filled
Enter protective gas argon gas, and use oxygen concentration in oxygen analyser real-time monitoring device simultaneously so that oxygen concentration control in obturator
System proceeds by experiment, by electrode close to matrix surface, the electrode is in the matrix table between 0.1%-0.15%
It is mobile that rule is continuously made in face, and electrode is remained a constant speed movement with the speed of 100mm/min, sedimentation time 5min.Finally described
Titanium alloy ontology coating is formed on matrix as shown in figure 3, coating structure even compact, thickness are about 340 μm, and coating occurs a little
Crackle and stomata form an irregular melt run, the uniform gapless in junction, coating and matrix between coating and matrix
Realize good metallurgical binding.
Embodiment 4：
Basis material uses TC4, electrode material to use TC4.Specific preparation process is as follows：
(1) to the base material for being used for electric spark deposition is polished with the sand paper of 400#, 800#, 1200# step by step successively with electrode,
Then material removal surface film oxide is cleaned by ultrasonic 6min with absolute ethyl alcohol, remove surface blot；
(2) electrode material one end is processed into it is coniform, cone angle be 70 °；
(3) matrix is connected with the anode of the pulse power of 3H-ES-6 type electric spark deposition devices, the electrode circular cone
Bottom end is fixed on work rifle, and the work rifle is connected with the cathode of the electric spark deposition device pulse power；
(4) specific process parameter of unbalanced pulse power supply, deposition is：Output power 3000W, discharge voltage 60V, puts
Electronic pulse width is 480 μ s, and deposition test carries out in atmosphere protection glove bag, and going in atmosphere protection glove bag for experiment is filled
Enter protective gas argon gas, and use oxygen concentration in oxygen analyser real-time monitoring device simultaneously so that oxygen concentration control in obturator
System proceeds by experiment, by electrode close to matrix surface, the electrode is continuous in the matrix surface between 0.3%
It is mobile to make rule, electrode is remained a constant speed movement with the speed of 100mm/min, sedimentation time 5min.Finally on the matrix
Titanium alloy ontology coating is formed, pattern is substantially same as Example 3, but thickness is different, and coating structure even compact, thickness is about
It it is 350 μm, a little crackle and stomata occurs in coating, and an irregular melt run, junction are formd between coating and matrix
Uniform gapless, coating realize good metallurgical binding with matrix.
Embodiment 5：
Basis material uses TA2, electrode material to use TA2.Specific preparation process is as follows：
(1) to the base material for being used for electric spark deposition is polished with the sand paper of 400#, 800#, 1200# step by step successively with electrode,
Then material removal surface film oxide is cleaned by ultrasonic 6min with absolute ethyl alcohol, remove surface blot；
(2) electrode material one end is processed into it is coniform, cone angle be 45 °；
(3) matrix is connected with the anode of the pulse power of 3H-ES-6 type electric spark deposition devices, the electrode circular cone
Bottom end is fixed on work rifle, and the work rifle is connected with the cathode of the electric spark deposition device pulse power；
(4) specific process parameter of unbalanced pulse power supply, deposition is：Output power 3800W, discharge voltage 55V, puts
Electronic pulse width is 360 μ s, and deposition test carries out in atmosphere protection glove bag, and going in atmosphere protection glove bag for experiment is filled
Enter protective gas argon gas, and use oxygen concentration in oxygen analyser real-time monitoring device simultaneously so that oxygen concentration control in obturator
System proceeds by experiment, by electrode close to matrix surface, the electrode is in the matrix table between 0.1~0.15%
It is mobile that rule is continuously made in face, and electrode is remained a constant speed movement with the speed of 100mm/min, sedimentation time 3min.Finally described
Titanium alloy ontology coating is formed on matrix as shown in figure 3, coating structure even compact, thickness are about 100 μm, and coating exists a little
Crackle and stomata form an irregular melt run, the uniform gapless in junction, coating and matrix between coating and matrix
Realize good metallurgical binding.
Embodiment 6：
Basis material uses TA2, electrode material to use TA2.Specific preparation process is as follows：
(1) to the base material for being used for electric spark deposition is polished with the sand paper of 400#, 800#, 1200# step by step successively with electrode,
Then material removal surface film oxide is cleaned by ultrasonic 6min with absolute ethyl alcohol, remove surface blot；
(2) electrode material one end is processed into it is coniform, cone angle be 60 °；
(3) matrix is connected with the anode of the pulse power of 3H-ES-6 type electric spark deposition devices, the electrode circular cone
Bottom end is fixed on work rifle, and the work rifle is connected with the cathode of the electric spark deposition device pulse power；
(4) specific process parameter of unbalanced pulse power supply, deposition is：Output power 4600W, discharge voltage 80V, puts
Electronic pulse width is 640 μ s, and deposition test carries out in atmosphere protection glove bag, and going in atmosphere protection glove bag for experiment is filled
Enter protective gas argon gas, and use oxygen concentration in oxygen analyser real-time monitoring device simultaneously so that oxygen concentration control in obturator
System proceeds by experiment, by electrode close to matrix surface, the electrode is in the matrix table between 0.05~0.1%
It is mobile that rule is continuously made in face, and electrode is remained a constant speed movement with the speed of 100mm/min, sedimentation time 3min.Finally described
Titanium alloy ontology coating is formed on matrix, coating structure even compact, pattern is substantially same as Example 5, and thickness is about 120 μ
M, there are a little crackle and stomatas for coating, and an irregular melt run, the uniform nothing in junction are formd between coating and matrix
Gap, coating realize good metallurgical binding with matrix.
Embodiment 7：
Basis material uses TA2, electrode material to use TA2.Specific preparation process is as follows：
(1) to the base material for being used for electric spark deposition is polished with the sand paper of 400#, 800#, 1200# step by step successively with electrode,
Then material removal surface film oxide is cleaned by ultrasonic 6min with absolute ethyl alcohol, remove surface blot；
(2) electrode material one end is processed into it is coniform, cone angle be 60 °；
(3) matrix is connected with the anode of the pulse power of 3H-ES-6 type electric spark deposition devices, the electrode circular cone
Bottom end is fixed on work rifle, and the work rifle is connected with the cathode of the electric spark deposition device pulse power；
(4) specific process parameter of unbalanced pulse power supply, deposition is：Output power 2800W, discharge voltage 60V, puts
Electronic pulse width is 180 μ s, and deposition test carries out in atmosphere protection glove bag, and going in atmosphere protection glove bag for experiment is filled
Enter protective gas argon gas, and use oxygen concentration in oxygen analyser real-time monitoring device simultaneously so that oxygen concentration control in obturator
System proceeds by experiment, by electrode close to matrix surface, the electrode is in the matrix table between 0.15~0.2%
It is mobile that rule is continuously made in face, and electrode is remained a constant speed movement with the speed of 100mm/min, sedimentation time 3min.Finally described
Titanium alloy ontology coating is formed on matrix, coating structure even compact, pattern is substantially same as Example 5, and thickness is about 90 μm,
There are a little crackle and stomatas for coating, form an irregular melt run between coating and matrix, and junction is uniformly continuously
Gap, coating realize good metallurgical binding with matrix.
Claims (10)
1. a kind of preparation method of the titanium alloy ontology coating based on electric spark deposition, it is characterised in that：The method according to
It is prepared by following steps：
(1) respectively using titanium alloy as matrix and electrode, with sand paper polishing matrix and electrode surface, surface scale is removed, so
Surface blot is removed afterwards obtains the matrix of pre-treatment and the electrode of pre-treatment；The material titanium alloy model of the matrix, electrode
It is consistent；
(2) electric spark deposition device is used, the matrix of the pre-treatment obtained by step (1) is fixed on workbench, it will the preceding place
The matrix of reason is connected with the cathode of the electric spark deposition device pulse power, and the electrode of the pre-treatment is fixed on work rifle, institute
The work rifle stated is connected with the anode of the electric spark deposition device pulse power, under protective gas atmosphere, before described
For the electrode of processing close to the matrix surface of the pre-treatment, the electrode of the pre-treatment is continuous in the matrix surface of the preceding processing
It moves back and forth, finally forms titanium alloy ontology coating on the matrix of the preceding processing；The electrode of the pre-treatment with it is described
Work rifle matches.
2. according to the method described in claim 1, it is characterized in that：In step (1), the method for removing surface blot is to make
It is cleaned by ultrasonic matrix and electrode with absolute ethyl alcohol or acetone.
3. according to the method described in claim 1, it is characterized in that：In step (1), the electrode is in pole shape, electrode tip
The region of discharge in portion is in coniform.
4. according to the method described in claim 3, it is characterized in that：In step (1), the region of discharge of the electrode head
Cone angle is 10~170 °.
5. according to the method described in claim 1, it is characterized in that：In step (1), the titanium alloy is alpha titanium alloy, nearly α
Titanium alloy, beta-titanium alloy or biphase titanium alloy.
6. according to the method described in claim 1, it is characterized in that：In step (2), the protective gas is argon gas, helium, two
The mixture of a kind of or more person in carbon oxide gas, hydrogen or nitrogen.
7. method according to claim 1 or 6, it is characterised in that：In step (2), the protected mode of the protective gas
It is carried out in sealing system for deposition test, going to for experiment is filled with protective gas in sealing system, and simultaneously with oxygen analyser reality
When monitoring device in oxygen concentration, when oxygen concentration is down to 0.5% or less in device, proceed by electric spark deposition experiment,
And remain that oxygen concentration is less than 0.5% in device during the test.
8. according to the method described in claim 1, it is characterized in that：In step (2), the deposition of the electric spark deposition device
Parameter is：100~5000W of output power, discharge voltage 24-100V, discharge pulse width are 10-1000 μ s.
9. according to the method described in claim 1, it is characterized in that：In step (2), the electrode of the pre-treatment and the preceding place
The distance between matrix of reason is 0.1~60 μm.
10. according to the method described in claim 1, it is characterized in that：In step (2), the electrode of the pre-treatment at the uniform velocity moves,
The movement speed is 10~600mm/min.
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