CN106148873B - The preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating - Google Patents
The preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating Download PDFInfo
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- CN106148873B CN106148873B CN201610617140.2A CN201610617140A CN106148873B CN 106148873 B CN106148873 B CN 106148873B CN 201610617140 A CN201610617140 A CN 201610617140A CN 106148873 B CN106148873 B CN 106148873B
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
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Abstract
The preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating of the present invention, is related to the plating to metal material, step is：It is formulated for aluminium/metal oxide composite powder of thermal spraying；Titanium alloy or Intermatallic Ti-Al compound workpiece surface to required coating carry out blasting treatment；Using the method for thermal spraying, the aluminium prepared in the first step/metal oxide composite powder is sprayed on the titanium alloy obtained in second step or Intermatallic Ti-Al compound workpiece surface, to form oxide-base coating.The method of the present invention eliminates this general and intrinsic step that the prior art first sprays the i.e. binder course of one layer of alloy underlayer before the ceramic coated base inorganic composite materials coating of metallic matrix, overcomes one layer of alloy underlayer of prior art spraying and the complex process, the cost that prepare ceramic base inorganic composite materials coating is made to obviously increase the defect with coating thermal shock resistance difference.
Description
Technical field
Technical scheme of the present invention is related to the plating to metal material, chemical combination specifically between titanium alloy and titanium-aluminium alloy category
The preparation method of object oxide on surface base coating.
Background technology
Titanium alloy has that density is small, specific strength is high, corrosion-resistant, resistance to low temperature is good and the Optimalities such as medium temperature performance stabilization
Can, it can long-term work and retention property be stablized under 550 DEG C of high temperature and under subzero 250 DEG C of low temperature.Therefore, titanium alloy is because its is excellent
Comprehensive performance be widely used in space flight and aviation, ocean engineering, weaponry, naval vessel, auto parts, petrochemical industry, life
The fields such as object medicine.However, titanium alloy hardness is low, friction coefficient is big, wears no resistance, high temperature (being higher than 600 DEG C) oxidation resistance
It is low, and be the non-conductor of heat；The destabilization problems caused by wearing can not only occur when being used in harsh environment, can also cause
A large amount of heat can not scatter and cause damages such as " titanium fire "；These disadvantages limit the use scope of titanium alloy.Titanium-aluminium alloy category
Between compound specific strength it is high, elevated temperature strength and rigidity are all higher than Ni-based and titanium-base alloy, are that Aeronautics and Astronautics aircraft is preferably new
Type lightening fire resistant structural material.However, Intermatallic Ti-Al compound heat/corrosion resistance is poor, resists at a high temperature of more than 650 DEG C
The defects of oxidability drastically declines so that its application is restricted, and cannot meet the hot junctions such as aero-engine and gas turbine
The job requirement of component.
How the hardness of titanium alloy, wearability, anti-corrosion and anti-is improved under the premise of keeping good overall mechanical properties
How high temperature oxidation stability improves the resistance to high temperature oxidation and hot corrosion resistance of Intermatallic Ti-Al compound, becomes domestic and foreign scholars'
One of research hotspot.Current research and development prove, using advanced surface modified coat technology, change between titanium alloy and titanium-aluminium alloy belong to
It is one of the effective ways to solve the above problems to close object surface and prepare wear-resisting, anti-corrosion and resistance to high temperature oxidation inorganic material coating.
Currently, titanium alloy surface coating process includes mainly：Carburizing, boronising and nitriding, aluminising, ion implanting, built-up welding are changed
Vapor deposition, physical vapour deposition (PVD), plating, chemical plating, differential arc oxidation, laser surface alloying and laser melting coating [ceramics,
2010,(5):30-33].Although these technologies improve the surface property of titanium alloy to a certain extent, the above method there are still
More serious defect.Wherein, traditional surface modification treatment such as carburizing, boronising and nitriding, there is long processing period, workpiece are easy
Denaturation and the thin defect of infiltration layer；Aluminized coating easy tos produce crackle；Ion implanting case depth is shallower；Built-up welding is to base material heat input
Greatly, easily cause base material deformation, and coating surface easy is formationed stomata of poor quality be mingled with；It is prepared by vapor deposition and electroplating chemical plating
Coating layer thickness it is low and poor with substrate combinating strength, gas-phase deposition is complicated, efficiency it is low [plating and finish, 2010,32
(10):15-20]；The ceramic coating that differential arc oxidation is formed is mainly the titanium oxide of porous structure, and thickness is thin, porosity is high, hard
It spends low；Laser melting coating surface is easy to crack, and laser beam, electron beam surface modification equipment are complicated, of high cost.The above-mentioned prior art
General character defect is that painting (plating) layer thickness for being obtained in titanium alloy surface is small, and compactness is poor, and hardness is low, the bond strength with matrix
It is low, it is easy to peel off and lose protection effect under the action of high temperature circulation stress.Therefore, a kind of surface-coating technology is developed,
Being prepared on titanium alloy and Intermatallic Ti-Al compound surface has that thickness is big, hardness is high, dense structure and and substrate combinating strength
High and good thermal shock coating has great importance, and becomes urgently to be resolved hurrily in titanium alloy and Intermatallic Ti-Al compound application
Critical issue.
Inorganic material coating has wear-resisting, anti-corrosion and heat safe characteristic, is used as changing between titanium alloy and titanium-aluminium alloy category
Close the preferred material of object face coat.CN98114349.0 discloses a kind of titanium alloy and the high temperature of Intermatallic Ti-Al compound is anti-
Shield technology, the technology the surface of titanium alloy or Intermatallic Ti-Al compound base material coat enamel coating, coating chemical composition with
SiO2For main component, enamel powder is put into absolute ethyl alcohol and is sufficiently stirred, be then sprayed at specimen surface, at 80~100 DEG C
It dries 10~20 minutes, is sintered 0.5~2 hour and forms at 850~1100 DEG C, coating layer thickness is about 10~60 μm.This enamel coating
The major defect of technology is first, enamel powder slurry is sprayed at after specimen surface in coating preparation process need through low temperature drying,
High temperature sintering, complex process, low production efficiency；Second, coating layer thickness is thin (being only 10~60 μm)；Third prepares oxide-base
Enamel powder main component used is SiO in coating procedure2, i.e. gained enamel coating is silicate glass coating, and hardness is low, resistance to
Mill property is poor.
In inorganic material coating, metal oxide base inorganic material coating is most widely used major class coating material,
For example aluminium oxide, titanium oxide, zirconium oxide or chromic oxide-based inorganic material coating are widely used as coating material and are used for improving entirety
The surface property of material.However, since metal oxide ceramic generally has the shortcomings that toughness is low and thermal shock resistance difference and
Greatly limit its use scope.In addition, being used as coating material, between oxide ceramic coating and titanium alloy and titanium-aluminium alloy belong to
It is not easy to form higher bond strength between compound basis material, and oxide ceramic coating itself also is difficult to reach high cause
Close property.
In plasma spraying method in relation to preparing ceramic base inorganic composite materials coating on metallic matrix, in Metal Substrate
On body before spraying ceramic coat or metal-cermic coating, it is that this method is general and solid first to spray one layer of alloy underlayer, that is, binder course
One of the step of having, the purpose is to increase the binding force of ceramic coating or metal-cermic coating and metallic matrix.Using thermal spraying
Technology when metal surface prepares ceramic coating, currently used alloy underlayer material include NiAl, NiCrA1, NiCrA1Y,
NiCrA1CoY, Fe-Al, CoCrAlY and NiCrBSi etc..Senol Yilmaz have studied prepares Al on industrially pure titanium surface2O3-
13%TiO2When coating, using combine layer process to coating performance influence [Ceramics International, 2009,35:
2017-2022], the combination layer material selected is Ni-5%Al, and whether there is or not the Al prepared when binder course for comparative study2O3With
Al2O3- 13%TiO2The performance of coating, he it was concluded that, the presence of binder course can improve ceramic coating and Metal Substrate
The binding performance of body.The conclusion studied according to forefathers, CN103484811A disclose metal oxide base inorganic compounding material
Expect coating and preparation method thereof, this is the present inventor team in patent of invention filed in 9 days October in 2013, the preparation
Include just that Ni-Al alloy underlayers, NiCr-Al alloy underlayers, Fe-Al are first sprayed to the surface of workpiece of required coating in method
Alloy underlayer, NiCrAlY alloy underlayers, CoCrAlY alloy underlayers or NiCrBSi alloy underlayers, this is a kind of general and intrinsic
Step.
However, henceforth, the present inventor team but proves by furtheing investigate and repeatedly practising for a long time：In titanium
Before alloy and the ceramic coated base inorganic composite materials coating of Intermatallic Ti-Al compound matrix, one layer of alloy underlayer is first sprayed,
Using this so-called general and intrinsic step, titanium alloy and Intermatallic Ti-Al compound matrix are applied with plasma sprayed ceramic
The increase rate of the thermal shock resistance of layer is not only limited even without raising, obtained titanium alloy and Intermatallic Ti-Al compound base
The thermal shock resistance of body and plasma spraying ceramic coat cannot still meet aerospace harsh environment to titanium alloy and titanium-aluminium alloy
The requirement of the face coat performance of compound parts between category, on the contrary, the addition of binder course is so that prepare the work of oxide-base coating
Skill complexity and cost obviously increase.
Invention content
The technical problem to be solved by the present invention is to：Titanium alloy is provided and Intermatallic Ti-Al compound oxide on surface base applies
The preparation method of layer, the method for the present invention eliminate the prior art before the ceramic coated base inorganic composite materials coating of metallic matrix
This general and intrinsic step for first spraying one layer of alloy underlayer, that is, binder course overcomes prior art and sprays a laminated gold
It is scarce with coating thermal shock resistance difference that bottom so that the complex process, the cost that prepare ceramic base inorganic composite materials coating are obviously increased
It falls into.
Technical solution is used by the present invention solves the technical problem：Titanium alloy and Intermatallic Ti-Al compound Surface Oxygen
The preparation method of compound base coating, steps are as follows：
The first step is formulated for aluminium/metal oxide composite powder of thermal spraying：
By aluminium powder 10~50% of the particle size range between 0.5 micron~10 microns and particle size range 0.001 micron~
10 microns of metal oxide powder 50~90% is uniformly mixed into feed powder, then it is feed powder to be uniformly mixed into weight ratio: binder=
100: 0.1~1.5 binder, is thus configured to the aluminium for thermal spraying/metal oxide composite powder, and above-mentioned percentage is attached most importance to
Measure percentage；
Second step carries out blasting treatment to workpiece surface：
Titanium alloy or Intermatallic Ti-Al compound workpiece surface to required coating carry out blasting treatment；
Third walks, the preparation of oxide-base coating：
Using the method for thermal spraying, the aluminium prepared in the first step/metal oxide composite powder is sprayed in second step
Obtained titanium alloy or Intermatallic Ti-Al compound workpiece surface, to form oxide-base coating.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, the aluminium powder accounts for 20~
40%, metal oxide powder accounts for 60~80%, and above-mentioned percentage is weight percentage.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, the aluminium powder accounts for 25~
35%, metal oxide powder accounts for 65~75%, and above-mentioned percentage is weight percentage.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, the titanium alloy are
TA series, TB series or TC series titanium alloys in any one.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, the titanium-aluminium alloy category
Between compound be Ti-50Al, Ti-48Al-1Cr, Ti-48Al-2Cr-2Nb or Ti-48Al-1.75Cr-2Nb in it is any one
Kind.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, the first step system
It is polyvinyl alcohol or methylcellulose to be ready for use on the binder used in the process of aluminium/metal oxide composite powder of thermal spraying.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, the metal oxide
For TiO2、Cr2O3、CrO3、Nb2O5、CoO、Co3O4、Co2O3、MoO3、Ni2O3Or one kind in NiO.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, the heat spraying method
For air plasma spraying, vacuum plasma spray coating, control atmosphere plasma spraying, high speed plasma spraying, high-speed flame spray
Painting or detonation flame spraying.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, involved raw material are equal
It is technique known to this field is existing from commercially available, involved sand blasting process and hot-spraying technique.
The beneficial effects of the invention are as follows：Compared with prior art, the present invention has substantive distinguishing features outstanding and significant
Progress is as follows：
(1) the method for the present invention breaks through general and intrinsic step pattern, eliminates a step and first sprays one layer of alloy underlayer i.e.
After the process of binder course, original repertoire is not only still kept, but also brings unexpected technique effect.It is below
Real data can prove completely：
1) production cost substantially reduces：To prepare the oxide-base coating with the i.e. binder course of alloy underlayer in the prior art
It for material, works out the costs of production, including alloy underlayer, that is, binder course powder raw material cost, manufacturing cost (labour cost, electricity
Take, spray consumptive material and equipment cost etc.), the cost that alloy underlayer, that is, binder course is prepared by calculating is 1000~1500 yuan/it is flat
Square rice.The method of the present invention eliminates a step and first sprays the one layer of alloy underlayer i.e. process of binder course, therefore, save 1000~
The production cost of 1500 yuan/square metre is equivalent to 1 square metre of oxide-base coating material of preparation and saves cost 30%~60%.
2) production technology simplifies：The one layer of alloy underlayer i.e. work of binder course is first sprayed since the method for the present invention eliminates a step
Sequence so that the production technology of the preparation of entire titanium alloy or Intermatallic Ti-Al compound oxide on surface base coating obviously simplifies,
1 square metre of oxide-base coating of production can averagely shorten 3~6 hours time, substantially increase production efficiency.
3) titanium alloy made from or the thermal shock resistance of Intermatallic Ti-Al compound oxide on surface base coating significantly improve：Than
The thermal shock resistance of the oxide-base coating of prior art preparation improves 20 times or more (referring to the table 1 in following example 1).
(2) present invention is inventor team by furtheing investigate and repeatedly practise for a long time, just obtained significantly into
The technological achievement of step, and definitely not those skilled in the art are easy is easy for accomplishing.Inventor team is in order to improve oxygen
Compound base coating and titanium alloy or the thermal shock resistance of Intermatallic Ti-Al compound matrix, have carried out coating system alloy underlayer first
The optimization of (i.e. binder course) is nearly 100 times tested by the time more than a year, but effect is still undesirable.Afterwards again by nearly 2 years
Further investigation and test repeatedly, find method direct spraying fabricated in situ oxide-base coating using the present invention in titanium alloy or
On Intermatallic Ti-Al compound matrix, oxide-base coating can be made to have with titanium alloy or Intermatallic Ti-Al compound matrix
Fabulous thermal shock resistance, while eliminating a step again and first spraying the one layer of alloy underlayer i.e. process of binder course so that entire titanium closes
The production technology of the preparation of gold or Intermatallic Ti-Al compound oxide on surface base coating obviously simplifies, and substantially increases production effect
Rate obtains prior unexpected technique effect and apparent economic benefit.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the XRD spectrum of prepared aluminium/titanium dioxide composite powder in embodiment 1.
Fig. 2 is the XRD spectrum of TC4 titanium alloy workpiece oxide on surface base coatings obtained in embodiment 1.
Fig. 3 is the SEM figures of 100 times of the amplification of TC4 titanium alloy workpiece oxide on surface base coatings in embodiment 1.
Fig. 4 is the SEM figures of 40000 times of the amplification of TC4 titanium alloy workpiece oxide on surface base coatings in embodiment 1.
Specific implementation mode
Embodiment 1
The first step is formulated for aluminium/metal oxide composite powder i.e. spraying feedstock of thermal spraying：
Aluminium powder 31% of the particle size range between 0.5 micron~10 microns and particle size range is micro- 0.001 micron~10
The TiO of rice2Powder 69% is uniformly mixed into feed powder, then it is feed powder to be uniformly mixed into weight ratio: binder=100: 0.8 polyethylene
Alcohol binder, is thus configured to the aluminium for thermal spraying/metal oxide composite powder, and above-mentioned percentage is weight percentage；
Second step carries out blasting treatment to workpiece surface：
Blasting treatment is carried out to the TC4 titanium alloy workpieces surface of required coating；
Third walks, the preparation of oxide-base coating：
Using the method for air plasma spraying, the aluminium prepared in the first step/metal oxide composite powder is sprayed on
The TC4 titanium alloy workpieces surface obtained in second step, to form oxide-base coating.
Embodiment illustrated in fig. 1 shows the XRD spectrum of prepared aluminium/titanium dioxide composite powder in the present embodiment 1, figure
In, " 1 " indicates that aluminium, " 2 " indicate titanium dioxide.It can be seen from the XRD spectrum of the figure aluminium/titanium dioxide composite powder by aluminium and
Titanium dioxide phase composition.
Embodiment illustrated in fig. 2 shows TC4 titanium alloy workpiece oxide on surface base coatings obtained in the present embodiment 1
XRD spectrum, in figure, " 1 " indicates that titanium monoxide, " 2 " indicate that aluminium oxide, " 3 " indicate that titanium aluminum oxide, " 4 " indicate titanium pentoxide,
" 5 " indicate titanium dioxide.The oxide-base coating made from the present embodiment it can be seen from XRD spectrum 1 mainly by aluminium oxide,
Titanium monoxide, titanium aluminum oxide, titanium pentoxide and titanium dioxide are mutually constituted.
By Fig. 1 and Fig. 2 comprehensive analysis it is found that using aluminium/titanium oxide composite powder as raw material, existed using air plasma spraying
TC4 titanium alloy surfaces successfully prepare situ oxygen compound base inorganic composite coating material.
Embodiment illustrated in fig. 3 shows 100 times of the amplification of titanium alloy surface oxide base coating made from the present embodiment 1
SEM schemes, it will be apparent from this figure that oxide-base coating consistency made from the present embodiment 1 is high, and with matrix TC4 titanium alloys
It is well combined.
Embodiment illustrated in fig. 4 shows 40000 times of the amplification of the titanium alloy surface oxide base coating obtained of this implementation 1
SEM figure.From magnification at high multiple SEM it can be seen from the figure thats, oxide-base coating is by a large amount of sub-micron made from the present embodiment 1
It is formed with the crystal grain of nano-scale.
By Fig. 1, Fig. 2, Fig. 3 and Fig. 4 comprehensive analysis it is found that using aluminium/titanium oxide composite powder as raw material, using atmospheric plasma
Spraying method goes out the oxide-base coating of submicron/nanometer structure in TC4 titanium alloy surfaces success fabricated in situ.
Whether there is or not the thermal shock longevity of the oxide-base coating of alloy underlayer, that is, binder course for TC4 titanium alloy surfaces in 1. embodiment 1 of table
Order data comparison
Table 1 lists TC4 titanium alloy surfaces in embodiment 1, and whether there is or not the thermal shock lifetime numbers of the oxide-base coating of alloy underlayer
According to comparison.Wherein, coating composition " ATO " indicates the oxide-base coating obtained by the present embodiment 1；TC4 (having alloy underlayer) table
Show the scheme using prior art preparation oxide-base coating, first sprays nickel alclad alloy underlayer in TC4 titanium alloy surfaces, then
Oxide-base coating ATO coatings are sprayed again；TC4 (alloy-free bottom) indicates to prepare the side of oxide-base coating using the present invention
Case directly sprays oxide-base coating ATO coatings, without spraying nickel alclad alloy underlayer in TC4 titanium alloy surfaces.From table 1
Find out, using the scheme of prior art preparation oxide-base coating, nickel alclad alloy underlayer first sprayed in TC4 titanium alloy surfaces,
Then spraying thermal shock lifetime of the obtained coating material system of oxide-base coating under the conditions of 850 DEG C of thermal shock (hardening) again is
17 times, thermal shock lifetime is not high；And the scheme of oxide-base coating is prepared using the present invention, directly sprayed in TC4 titanium alloy surfaces
Thermal shock lifetime of the obtained coating material system of oxide-base coating under the conditions of 850 DEG C of thermal shock (hardening) is more than 360 times
(coating does not fail after thermal shock recycles 360 times, and experiment stops).Facts proved that preparing oxide-base coating using the present invention
Scheme directly makes the heat resistanceheat resistant of titanium alloy surface oxide base coating in TC4 titanium alloy surfaces spraying oxide-base coating ATO coatings
Shock stability significantly improves (method that alloy underlayer is added when than prior art preparation oxide-base coating improves 20 times or more).With
Upper data result is by the present inventor team many experiments verification proof, the TC4 titanium alloys made from the method for the present invention
The thermal shock resistance of oxide on surface base coating significantly improves.In following embodiment, the present inventor team equally uses
Many experiments verification proof, all titanium alloys made from the method for the present invention or Intermatallic Ti-Al compound matrix surface oxide
The thermal shock resistance of base coating is significantly improved.
Embodiment 2
The first step is formulated for aluminium/metal oxide composite powder i.e. spraying feedstock of thermal spraying：
Aluminium powder 10% of the particle size range between 0.5 micron~10 microns and particle size range is micro- 0.001 micron~10
The Cr of rice2O3Powder 90% is uniformly mixed into feed powder, then it is feed powder to be uniformly mixed into weight ratio: binder=100: 0.1 binder
Methylcellulose, is thus configured to the aluminium for thermal spraying/metal oxide composite powder, and above-mentioned percentage is weight percentage；
Second step carries out blasting treatment to workpiece surface：
Blasting treatment is carried out to the Ti-50Al Intermatallic Ti-Al compound workpiece surfaces of required coating；
Third walks, the preparation of oxide-base coating：
Using the method for vacuum plasma spray coating, the aluminium prepared in the first step/metal oxide composite powder is sprayed on
The Ti-50Al Intermatallic Ti-Al compound workpiece surfaces obtained in second step, to form oxide-base coating.
Embodiment 3
The first step is formulated for aluminium/metal oxide composite powder i.e. spraying feedstock of thermal spraying：
Aluminium powder 50% of the particle size range between 0.5 micron~10 microns and particle size range is micro- 0.001 micron~10
The Ni of rice2O3Powder 50% is uniformly mixed into feed powder, then it is feed powder to be uniformly mixed into weight ratio: binder=100: 1.5 binder
Polyvinyl alcohol, is thus configured to the aluminium for thermal spraying/metal oxide composite powder, and above-mentioned percentage is weight percentage；
Second step carries out blasting treatment to workpiece surface：
Second step carries out blasting treatment to workpiece surface：
Blasting treatment is carried out to the TA12 titanium alloy workpieces surface of required coating；
Third walks, the preparation of oxide-base coating：
Using the method for control atmosphere plasma spraying, the aluminium prepared in the first step/metal oxide composite powder is sprayed
It is coated in the TA12 titanium alloy workpieces surface obtained in second step, to form oxide-base coating.
Embodiment 4
Except the metal oxide powder in the first step is CrO3, aluminium powder accounts for 20%, CrO3Powder accounts for 80%, and oxide is walked in third
High speed plasma spraying method is used in the preparation of base coating, is Ti-48Al-1Cr titanium-aluminium alloys belong between the workpiece of required coating
Except compound workpiece, other are the same as embodiment 1.
Embodiment 5
Except the metal oxide powder in the first step is Nb2O5, aluminium powder accounts for 40%, Nb2O5Powder accounts for 60%, walks and aoxidizes in third
High speed flame spraying method is used in the preparation of object base coating, the workpiece to required coating is Ti-48Al-2Cr-2Nb titanium-aluminium alloys
Between category except compound workpiece, other are the same as embodiment 2.
Embodiment 6
Except the metal oxide powder in the first step is CoO, aluminium powder accounts for 25%, CoO powder and accounts for 75%, and oxide-base is walked in third
Detonation flame spraying method is used in the preparation of coating, is to change Ti-48Al-1.75Cr-2Nb titanium-aluminium alloys belong between the workpiece of required coating
It closes except object workpiece, other are the same as embodiment 2.
Embodiment 7
Except the metal oxide powder in the first step is Co3O4, aluminium powder accounts for 35%, Co3O4Powder accounts for 65%, walks and aoxidizes in third
Detonation flame spraying method is used in the preparation of object base coating, the workpiece to required coating is except TB2 titanium alloy workpieces, other are the same as real
Apply example 3.
Embodiment 8
Except the metal oxide powder in the first step is Co2O3Except, other are the same as embodiment 3.
Embodiment 9
Except the metal oxide powder in the first step is MoO3Except, other are the same as embodiment 1.
Embodiment 10
In addition to the metal oxide powder in the first step is NiO, other are the same as embodiment 2.
In above-described embodiment, involved raw material is from commercially available, involved sand blasting process and thermal spraying work
Skill is technique known to this field is existing.
Claims (5)
1. the preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating, it is characterised in that steps are as follows：
The first step is formulated for aluminium/metal oxide composite powder of thermal spraying：
Aluminium powder 10~50% of the particle size range between 0.5 micron~10 microns and particle size range is micro- 0.001 micron~10
The metal oxide powder 50~90% of rice is uniformly mixed into feed powder, then it is feed powder to be uniformly mixed into weight ratio: binder=100:
0.1~1.5 binder, is thus configured to the aluminium for thermal spraying/metal oxide composite powder, and above-mentioned percentage is weight hundred
Divide ratio；
Second step carries out blasting treatment to workpiece surface：
Titanium alloy or Intermatallic Ti-Al compound workpiece surface to required coating carry out blasting treatment；
Third walks, the preparation of oxide-base coating：
Using the method for thermal spraying, the aluminium prepared in the first step/metal oxide composite powder is sprayed in second step and is obtained
Titanium alloy or Intermatallic Ti-Al compound workpiece surface, to form oxide-base coating.
2. the preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating according to claim 1,
It is characterized in that：The aluminium powder accounts for 20% or 40%, and metal oxide powder accounts for 60% or 80%, and above-mentioned percentage is weight percent
Than.
3. the preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating according to claim 1,
It is characterized in that：The titanium alloy is any one in TA series, TB series or TC series titanium alloys.
4. the preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating according to claim 1,
It is characterized in that：The Intermatallic Ti-Al compound is Ti-50Al, Ti-48Al-1Cr, Ti-48Al-2Cr-2Nb or Ti-
Any one in 48Al-1.75Cr-2Nb.
5. the preparation method of titanium alloy and Intermatallic Ti-Al compound oxide on surface base coating according to claim 1,
It is characterized in that：The metal oxide is Cr2O3、CrO3、Nb2O5、CoO、Co3O4、Co2O3、MoO3、Ni2O3Or one in NiO
Kind.
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