CN106119758B - The preparation method of titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating - Google Patents
The preparation method of titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating Download PDFInfo
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- CN106119758B CN106119758B CN201610617312.6A CN201610617312A CN106119758B CN 106119758 B CN106119758 B CN 106119758B CN 201610617312 A CN201610617312 A CN 201610617312A CN 106119758 B CN106119758 B CN 106119758B
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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
- C23C4/06—Metallic material
Abstract
The preparation method of titanium alloy and Intermatallic Ti-Al compound of the present invention surface boronation ti-based coating, it is related to the plating to metal material, step is: preparation is used for titanium oxide/boron carbide/aluminum composite powder of thermal spraying, the blasting treatment of workpiece surface, using the method for thermal spraying, the titanium oxide for the being used for thermal spraying/boron carbide/aluminum composite powder prepared in the first step is painted on titanium alloy or Intermatallic Ti-Al compound workpiece surface in second step Jing Guo blasting treatment, to form boronation ti-based 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 metal base surface, overcomes one layer of alloy underlayer of prior art spraying and the complex process, the cost that prepare titanium alloy or Intermatallic Ti-Al compound surface boronation ti-based coating is made to obviously increase the defect with coating thermal shock resistance difference.
Description
Technical field
Technical solution 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 surface boronation ti-based coating.
Background technique
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, coefficient of friction 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 using in harsh environment, also will 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, it is that Aeronautics and Astronautics aircraft is preferably new that elevated temperature strength and rigidity are all higher than Ni-based and titanium-base alloy
Type lightening fire resistant structural material.However, Intermatallic Ti-Al compound heat/corrosion resistance is poor, anti-at a high temperature of more than 650 DEG C
The defects of oxidability sharply declines is not able to satisfy the hot ends such as aero-engine and gas turbine so that its application is restricted
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
Closing object surface and preparing wear-resisting, anti-corrosion and resistance to high temperature oxidation inorganic material coating is one of the effective ways to solve the above problems.
Currently, titanium alloy surface coating process specifically includes that carburizing, boronising and nitriding, aluminising, ion implanting, built-up welding, change
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 is easy to 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；Vapor deposition and electroplating chemical plating preparation
Coating layer thickness it is low and poor with substrate combinating strength, gas-phase deposition is complicated, low efficiency [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 the device is complicated, at high cost for laser beam, electron beam surface modification.The above-mentioned prior art
General character defect be titanium alloy surface obtain painting (plating) thickness degree it is small, 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,
Have that thickness is big, hardness is high, dense structure and and substrate combinating strength in titanium alloy and the preparation of Intermatallic Ti-Al compound surface
High and good thermal shock coating has great importance, and becomes urgently to be resolved in titanium alloy and Intermatallic Ti-Al compound application
Critical issue.
Inorganic material coating has wear-resisting, anti-corrosion and resistant to high temperature characteristic, is used as changing between titanium alloy and titanium-aluminium alloy category
Close the preferred material of object surface covering.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 substrate coat enamel coating, coating chemical component with
SiO2For main component, enamel powder is put into dehydrated 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, production efficiency are low；Second, coating layer thickness is thin (only 10~60 μm)；Third, prepares coating process
In enamel powder main component used be SiO2, i.e. gained enamel coating is silicate glass coating, and hardness is low, wears no resistance.
Currently, boride-based inorganic material coating is one of most widely used inorganic material coating, such as boronation titanium-based, boronation zirconium base
Inorganic material coating is used to improve the surface property of integral material as coating material.TiB2With high-melting-point, high rigidity, low
Many excellent properties such as the good and high resistance to chemical corrosion of density, wearability, are widely used in aerospace, weaponry, smelting
Gold and the fields such as cutter, as such as cutting tool, electrode, turbine blade, combustion chamber, chemical reactor, crucible, pump impeller
With the protective layer of thermocouple.However, due to TiB2Base ceramic material generally has the shortcomings that toughness is low and thermal shock resistance is poor and big
Its use scope is limited greatly.In addition, being used as coating material, TiB2Base ceramic coating and titanium alloy and titanium-aluminium alloy are changed between belonging to
It is not easy to form higher bond strength, and TiB between conjunction object matrix2Base ceramic coating itself is also extremely difficult to high compactness.
It is well known that metal can be significantly improved by preparing inorganic composite materials coating on metallic matrix using plasma spray technology
Hardness, wearability and the corrosion resistance on surface have in aerospace, petrochemical industry, metallurgy, machinery and field of textile industry
It is widely applied.In plasma spray technology, the sprayable material ranges of plasma spraying method are wide, sprayable metal, alloy, non-
Metal, ceramics etc., spray-on coating thickness controllability is good, sprayable tens microns of thick coatings, can also prepare more than one millimeter, very
To the coating of several millimeters thicks.
In heat spraying method in relation to preparing ceramic base inorganic composite materials coating on metallic matrix, on metallic matrix
Before spraying ceramic coat or metal-cermic coating, first spraying one layer of alloy underlayer, that is, binder course is that this method is general and intrinsic
One of step, the purpose is to increase the binding force of ceramic coating or metal-cermic coating and metallic matrix.Using plasma 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, which has 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, CN103484814A disclose a kind of boronation titanium-based inorganic compounding material
Expect the preparation method of coating, this is the present inventor team in patent of invention, the preparation side filed on October 9th, 2013
Just include in method the surface of workpiece of required coating is first sprayed layer of Ni-Al, NiCr-Al, Fe-Al, NiCrAlY,
A kind of CoCrAlY or NiCrBSi alloy-layer this general and intrinsic step as alloy underlayer.
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 and plasma sprayed ceramic are applied
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 is not able to satisfy aerospace harsh environment still to titanium alloy and titanium-aluminium alloy
The requirement of the surface covering performance of compound parts between category, on the contrary, the addition of binder course is so that prepare the work of boronation ti-based coating
Skill complexity and cost obviously increase.
Summary of the invention
The technical problems to be solved by the present invention are: providing titanium alloy and the painting of Intermatallic Ti-Al compound surface boronation titanium-based
The preparation method of layer, the method for the present invention eliminate the prior art in the ceramic coated base inorganic composite materials coating of metal base surface
One layer of alloy underlayer, that is, binder course this general and intrinsic step is first sprayed before, is overcome prior art and is sprayed one layer
Alloy underlayer increases the complex process, the cost that prepare titanium alloy or Intermatallic Ti-Al compound surface boronation ti-based coating obviously
Sum it up the defect of coating thermal shock resistance difference.
The present invention solves technical solution used by the technical problem: titanium alloy and Intermatallic Ti-Al compound surface boron
Change the preparation method of ti-based coating, steps are as follows:
The first step, preparation are used for titanium oxide/boron carbide/aluminum composite powder of thermal spraying:
By aluminium powder of the particle size range between 0.5 micron~10 microns, particle size range between 0.001 micron~10 microns
Boron carbide powder between 0.001 micron~10 microns of titanium oxide powder and particle size range be uniformly mixed into compound powder, wherein
The weight percent that boron carbide powder accounts for three kinds of raw material powder gross masses is 5~15%, and aluminium powder adds titanium oxide powder to account for three kinds of raw materials
The weight percent of powder gross mass is 85~95%, and the weight ratio between titanium oxide powder and aluminium powder is then 75~65:25~35,
Uniformly being mixed into weight ratio again is above-mentioned compound powder: thus binder=100:0.1~1.5 binder is configured to be used for
The titanium oxide of thermal spraying/boron carbide/aluminum composite powder；
Second step, the blasting treatment of workpiece surface:
Titanium alloy or Intermatallic Ti-Al compound workpiece surface to required coating carry out blasting treatment；
Third step, the preparation of boronation ti-based coating:
Using the method for thermal spraying, the titanium oxide for the being used for thermal spraying/boron carbide/aluminum composite powder that will be prepared in the first step
The titanium alloy or Intermatallic Ti-Al compound workpiece surface being painted in second step Jing Guo blasting treatment, to form boronation
Ti-based coating.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating, the titanium alloy are
TA series, TB series or TC series titanium alloy in any one.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based 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 surface boronation ti-based coating, the first step system
Being ready for use on the binder used in the process of titanium oxide/boron carbide/aluminum composite powder of thermal spraying is polyvinyl alcohol or methylcellulose.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating, the heat spraying method
For air plasma spraying method, vacuum plasma spray coating method, control atmosphere plasma spraying method, high speed plasma spraying
Method, high speed flame spraying method or detonation flame spraying method.
The preparation method of above-mentioned titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating, related raw material are equal
It is technique known to this field is existing from commercially available, described sand blasting process and hot-spraying technique.
The beneficial effects of the present invention are: compared with prior art, the present invention is with substantive distinguishing features outstanding and significantly
Progress is as follows:
(1) the method for the present invention breaks through general and intrinsic step mode, 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 technical effect.It is below
Real data can prove that completely
1) production cost substantially reduces: to prepare the boronation ti-based 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, preparation cost (labour cost, electricity
Take, spray consumptive material and equipment cost etc.), by calculating preparation alloy underlayer, that is, binder course cost be 1000~1500 yuan/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 boronation ti-based coating material of preparation and saves cost 30%~60%.
2) production technology simplifies: first spraying the one layer of alloy underlayer i.e. work of binder course 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 surface boronation ti-based coating obviously simplifies,
The time that produces 1 square metre of boronation ti-based coating averagely and can shorten 3~6 hours, substantially increase production efficiency.
3) thermal shock resistance of titanium alloy made from or Intermatallic Ti-Al compound surface boronation ti-based coating significantly improves: ratio
The thermal shock resistance of the boronation ti-based coating of prior art preparation improves 10 times or more (being detailed in 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
Step is as a result, and definitely not those skilled in the art are easy is easy for accomplishing.Inventor team is in order to improve boronation titanium-based
The thermal shock resistance of coating and titanium alloy or Intermatallic Ti-Al compound matrix, has carried out coating system alloy underlayer first and (has tied
Close layer) optimization, nearly 100 times tested by the time more than a year, but effect is still undesirable.Goed deep into again by nearly 2 years afterwards
It studies and tests repeatedly, discovery is using method direct spraying in-situ synthesis of boride ti-based coating of the invention in titanium alloy or titanium aluminium
On intermetallic compound base body, titanium boride base coating and titanium alloy or Intermatallic Ti-Al compound matrix can be made to have 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 alloy or
The production technology of the preparation of Intermatallic Ti-Al compound surface boronation ti-based coating obviously simplifies, and substantially increases production efficiency,
Obtain unexpected in advance technical effect and apparent economic benefit.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is titanium oxide/boron carbide/aluminum composite powder XRD spectrum obtained in embodiment 1.
Fig. 2 is the XRD spectrum of TC4 titanium alloy surface boronation ti-based coating obtained in embodiment 1.
Fig. 3 is 200 times of amplification of the SEM figure of TC4 titanium alloy surface boronation ti-based coating obtained in embodiment 1.
Fig. 4 is 10000 times of amplification of the SEM figure of TC4 titanium alloy surface boronation ti-based coating obtained in embodiment 1.
Specific embodiment
Embodiment 1
The first step, preparation are used for titanium oxide/boron carbide/aluminum composite powder of thermal spraying:
By aluminium powder of the particle size range between 0.5 micron~10 microns, particle size range between 0.001 micron~10 microns
Boron carbide powder between 0.001 micron~10 microns of titanium oxide powder and particle size range be uniformly mixed into compound powder, wherein
The weight percent that boron carbide powder accounts for three kinds of raw material powder gross masses is 8%, and it is total that aluminium powder adds titanium oxide powder to account for three kinds of raw material powder
The weight percent of quality is 92%, and the weight ratio between titanium oxide powder and aluminium powder is then 69: 31, then is uniformly mixed into weight
Than being above-mentioned compound powder: binder=100: thus 0.8 binder polyvinyl alcohol is configured to the oxidation for thermal spraying
Titanium/boron carbide/aluminum composite powder；
Second step, the blasting treatment of workpiece surface:
Blasting treatment is carried out to the TC4 titanium alloy workpiece surface of required coating；
Third step, the preparation of boronation ti-based coating:
Using the method for air plasma spraying, by the titanium oxide/boron carbide for being used for thermal spraying prepared in the first step/
Aluminium composite powder is painted on the TC4 titanium alloy workpiece surface in second step Jing Guo blasting treatment, to form the painting of boronation titanium-based
Layer.
Fig. 1 is titanium oxide/boron carbide/aluminum composite powder XRD spectrum obtained in the present embodiment.As can be seen that compound
Powder is by aluminium, titanium dioxide and boron carbide phase composition.
Fig. 2 is the XRD spectrum of TC4 titanium alloy surface boronation ti-based coating made from the present embodiment.As can be seen that prepared
Coating mainly be mutually made of titanium diboride, titanium carbide and aluminium oxide.Comparison diagram 1 and Fig. 2 it is found that with titanium oxide/boron carbide/
Aluminium composite powder is raw material, uses air plasma spraying method that main component is prepared in situ out as TiB in TC4 titanium alloy surface2、
TiC and Al2O3Boronation ti-based coating.
Fig. 3 is 200 times of amplification of the SEM figure of TC4 titanium alloy surface boronation ti-based coating made from the present embodiment.It can see
Out, coating is well combined with matrix TC4 titanium alloy, and coating consistency is high.
Fig. 4 is 10000 times of amplification of the SEM figure of TC4 titanium alloy surface boronation ti-based coating made from the present embodiment.From height
It can be seen that boronation ti-based coating made from the present embodiment by the crystalline substance of a large amount of sub-micron and nano-scale in amplification SEM figure again
Grain composition.
By Fig. 1, Fig. 2, Fig. 3 and Fig. 4 comprehensive analysis it is found that using titanium oxide/boron carbide/aluminum composite powder as raw material, using big
It is TiB that gas plasma spraying method, which successfully prepares the main component with aplitic texture in TC4 titanium alloy surface,2, TiC and
Al2O3Boronation ti-based coating.
Whether there is or not the thermal shock longevity of alloy underlayer, that is, binder course boronation ti-based coating for TC4 titanium alloy surface in 1. embodiment 1 of table
Order data comparison
In table 1, material composition " TiO2-B4C-Al " is indicated with titanium oxide powder, boron carbide powder and aluminium powder by embodiment 1
The titanium oxide for thermal spraying/boron carbide/aluminum composite powder that method is configured to, this raw material of the present embodiment 1, using atmosphere etc. from
It is TiB that main component, which is prepared in situ out, in TC4 titanium alloy surface in sub- spraying method2, TiC and Al2O3Boronation ti-based coating.TC4
(having alloy underlayer) indicates to use the scheme of prior art preparation boronation ti-based coating, first sprays nickel packet in TC4 titanium alloy surface
Then aluminium alloy bottom sprays boronation titanium-based composite coat again.TC4 (alloy-free bottom) indicates to prepare boron using the method for the present invention
Change the scheme of ti-based coating, directly boronation titanium-based composite coat is sprayed in TC4 titanium alloy surface, without spraying nickel alclad alloy bottom
Layer.From table 1 it follows that first spraying nickel in TC4 titanium alloy surface using the scheme of prior art preparation boronation ti-based coating
Then alclad alloy underlayer sprays boronation titanium-based composite coat again, obtained coating material system is in 850 DEG C of thermal shocks (hardening)
Under the conditions of thermal shock lifetime be 29 times, thermal shock lifetime is not high.And the scheme of the method for the present invention preparation boronation ti-based coating is used, directly
It connects in the TC4 titanium alloy surface spraying obtained coating material system of boronation titanium-based composite coat in 850 DEG C of thermal shock (hardening) items
Thermal shock lifetime under part is 350 times, it can be seen that compared with the scheme of prior art preparation boronation ti-based coating, using the present invention
Method prepares the scheme of boronation ti-based coating, the boronation ti-based coating directly gone out in TC4 titanium alloy surface spraying fabricated in situ
Thermal shock resistance significantly improves, when than prior art preparation boronation ti-based coating be added alloy underlayer method improve 10 times with
On.Above data result is by the present inventor team many experiments verifying proof, the TC4 titanium made from the method for the present invention
The thermal shock resistance of alloy surface boronation ti-based coating significantly improves.In following embodiment, the present inventor team is same
Sample is verified with many experiments and is proved, all titanium alloys made from the method for the present invention or Intermatallic Ti-Al compound matrix surface boron
The thermal shock resistance for changing ti-based coating is significantly improved.
Embodiment 2
The first step, preparation are used for titanium oxide/boron carbide/aluminum composite powder of thermal spraying:
By aluminium powder of the particle size range between 0.5 micron~10 microns, particle size range between 0.001 micron~10 microns
Boron carbide powder between 0.001 micron~10 microns of titanium oxide powder and particle size range be uniformly mixed into compound powder, wherein
The weight percent that boron carbide powder accounts for three kinds of raw material powder gross masses is 5%, and it is total that aluminium powder adds titanium oxide powder to account for three kinds of raw material powder
The weight percent of quality is 95%, and the weight ratio between titanium oxide powder and aluminium powder is then 75: 25, then is uniformly mixed into weight
Than being above-mentioned compound powder: binder=100: thus 0.1 binder methylcellulose is configured to the oxidation for thermal spraying
Titanium/boron carbide/aluminum composite powder；
Second step, the blasting treatment of workpiece surface:
Blasting treatment is carried out to the Ti-50Al Intermatallic Ti-Al compound workpiece surface of required coating；
Third step, the preparation of boronation ti-based coating:
Using vacuum plasma spray coating method, the titanium oxide/boron carbide/aluminum for being used for thermal spraying that will be prepared in the first step
Composite powder is painted on the Ti-50Al Intermatallic Ti-Al compound workpiece surface in second step Jing Guo blasting treatment, thus shape
At boronation ti-based coating.
Embodiment 3
The first step, preparation are used for titanium oxide/boron carbide/aluminum composite powder of thermal spraying:
By aluminium powder of the particle size range between 0.5 micron~10 microns, particle size range between 0.001 micron~10 microns
Boron carbide powder between 0.001 micron~10 microns of titanium oxide powder and particle size range be uniformly mixed into compound powder, wherein
The weight percent that boron carbide powder accounts for three kinds of raw material powder gross masses is 15%, and it is total that aluminium powder adds titanium oxide powder to account for three kinds of raw material powder
The weight percent of quality is 85%, and the weight ratio between titanium oxide powder and aluminium powder is then 65: 35, then is uniformly mixed into weight
Than being above-mentioned compound powder: binder=100: thus 1.5 binder polyvinyl alcohol is configured to the oxidation for thermal spraying
Titanium/boron carbide/aluminum composite powder；
Second step, the blasting treatment of workpiece surface:
Blasting treatment is carried out to the TA12 titanium alloy workpiece surface of required coating；
Third step, the preparation of boronation ti-based coating:
Using control atmosphere plasma spraying method, the titanium oxide/carbonization for being used for thermal spraying that will be prepared in the first step
Boron aluminium composite powder is painted on the TA12 titanium alloy workpiece surface in second step Jing Guo blasting treatment, to form titanium boride
Base coating.
Embodiment 4
Except high speed plasma spraying method is used in the preparation of third step boronation ti-based coating, to the workpiece of required coating
Except Ti-48Al-1Cr Intermatallic Ti-Al compound workpiece, other are the same as embodiment 1.
Embodiment 5
Except, using high speed flame spraying method, the workpiece to required coating is in the preparation of third step boronation ti-based coating
Except Ti-48Al-2Cr-2Nb Intermatallic Ti-Al compound workpiece, other are the same as embodiment 2.
Embodiment 6
Except detonation flame spraying method is used in the preparation of third step boronation ti-based coating, the workpiece to required coating is Ti-
Except 48Al-1.75Cr-2Nb Intermatallic Ti-Al compound workpiece, other are the same as embodiment 2.
Embodiment 7
In addition to the workpiece to required coating is TB2 titanium alloy workpiece, other are the same as embodiment 3.
In above-described embodiment, related raw material is from commercially available, described sand blasting process and hot-spraying technique
It is technique known to this field is existing.
Claims (3)
1. the preparation method of titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating, it is characterised in that steps are as follows:
The first step, preparation are used for titanium oxide/boron carbide/aluminum composite powder of thermal spraying:
By aluminium powder, particle size range oxygen 0.001 micron~10 micron between of the particle size range between 0.5 micron~10 microns
Change the boron carbide powder of titanium valve and particle size range between 0.001 micron~10 microns and be uniformly mixed into compound powder, wherein carbonization
The mass percent that boron powder accounts for above-mentioned aluminium powder, titanium oxide powder and boron carbide powder these three raw material powder gross masses is 5~15%, aluminium powder
Add titanium oxide powder account for the mass percent of above-mentioned aluminium powder, titanium oxide powder and boron carbide powder these three raw material powder gross masses be 85~
95%, the mass ratio between titanium oxide powder and aluminium powder is then 75~65:25~35, then it is above-mentioned mixed for being uniformly mixed into mass ratio
Close feed powder: thus binder=100:0.1~1.5 binder is configured to multiple for titanium oxide/boron carbide/aluminum of thermal spraying
Close powder；
Second step, the blasting treatment of workpiece surface:
Titanium alloy or Intermatallic Ti-Al compound workpiece surface to required coating carry out blasting treatment；
Third step, the preparation of boronation ti-based coating:
It is using the method for thermal spraying, the titanium oxide for the being used for thermal spraying/boron carbide/aluminum composite powder prepared in the first step is direct
The titanium alloy or Intermatallic Ti-Al compound workpiece surface being sprayed in second step Jing Guo blasting treatment, to form boronation titanium-based
Coating.
2. the preparation method of titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating according to claim 1,
Be characterized in that: the titanium alloy is any one in TA series, TB series or TC series titanium alloy.
3. the preparation method of titanium alloy and Intermatallic Ti-Al compound surface boronation ti-based coating according to claim 1,
Be 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.
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