CN103628018A - High speed oxygen fuel spraying system and metal ceramic coating prepared by the same - Google Patents
High speed oxygen fuel spraying system and metal ceramic coating prepared by the same Download PDFInfo
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- CN103628018A CN103628018A CN201210307131.5A CN201210307131A CN103628018A CN 103628018 A CN103628018 A CN 103628018A CN 201210307131 A CN201210307131 A CN 201210307131A CN 103628018 A CN103628018 A CN 103628018A
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Abstract
The invention on the one hand provides a high speed oxygen fuel spraying system, which includes a first high speed oxygen fuel spray gun for spraying ceramics and a second high speed oxygen fuel spray gun for spraying metal or metal alloy. The jet flows sprayed simultaneously from the first high speed oxygen fuel spray gun and the second high speed oxygen fuel spray gun are overlapped and covered on the surface of a workpiece to be coated, so as to form the coating. The metal or metal alloy in the coating varies along the thickness direction, and the closer to the surface of the workpiece, the content of metal or metal alloy is higher. On the other hand, the invention also provides a method for preparing ceramic metal coating according to the above system.
Description
Technical field
The present invention relates to high-velocity oxy-fuel paint finishing (or being called hypersonic flame spraying system), more specifically, the present invention relates to comprise the paint finishing of two high-velocity oxy-fuel spray guns and use described paint finishing to prepare particularly Mo-Al of composite ceramics metal
2o
3coating.
Background technology
At present, the Sustainable development of fossil fuel resource is, the problem of the discharge of carbonic acid gas and Global warming is more and more concerned.Very crucial is to look for novel energy to substitute the fossil oil of current use, and such novel energy should be low-cost, environmental protection and reproducible.Sun power can meet above-mentioned requirements, and study widely and utilize it recent decades.
Technology by direct use semiconductor photovoltaic solar cell or use solar energy can produce electric energy from sun power, and wherein solar energy technology is utilized from the turbine of the steam driven generating use of solar heating.With respect to photovoltaic solar cell, solar energy technology does not rely on the supply of silicon wafer, effective especially for large-scale generating, and if heat reservoir is set, even at night, can produce electric energy yet.Consider these advantages, research and develop at present interest and turn to more solar energy technology.
Concentrating solar technology (CSP) can be gathered in sunlight for absorbing the receptor of sun power, and it has multiple different layout type, comprises parabolic trough type, linear Fresnel formula, dish formula, central receptor formula etc.Wherein, to reach the paraboloid trough type of 550 ℃ be that development is best, concentrating solar technology that can be commercial to working temperature.The primary clustering of parabolic trough type comprises reverberator, solar receiver, holder and steam turbine.As key component, solar receiver greatly affects the assimilated efficiency of sun power.
Solar receiver consists of glass shell and metal tube, wherein on metal tube, is coated with solar absorptive material, as Mo-Al
2o
3the coating of metal-dielectric composite cermet.This coating is prepared by the evaporation of radio-frequency electromagnetic sputter conventionally in valve tube.For example, CN101737982A discloses a kind of solar selectively absorbing coating and preparation method thereof, and the second layer of described absorber coatings is the MoSi that uses radio-frequency sputtering to prepare
2and Al
2o
3sintering metal mixolimnion, this second layer is by thickness and MoSi
2two variant subgrades of volume fraction form.TW201022461A1 discloses a kind of solar selective absorbing film and manufacture method thereof.It prepares individual layer Mo-Al on workpiece by vacuum splashing and plating
2o
3metal-ceramic composite membrane.In addition, CN85100142A discloses a kind of new vacuum sputtering technology, and there is the simple vacuum tightness of equipment and require the features such as low, the decomposition but the metal nitride of preparing can be degenerated after temperature surpasses 350 degree, this technology also cannot be in order to prepare Mo-Al at present
2o
3metal-ceramic composite membrane.
The growth velocity of the metal ceramics thin film of preparing by radio-frequency sputtering technology is low, and radio-frequency sputtering need to be carried out in valve tube.The use of radio-frequency sputtering technology in addition, is also subject to the restriction of the size and dimension of receptor pipe fitting.Therefore, need to research and develop equipment is easier, production efficiency is higher coating technology and existingly by radio-frequency sputtering, prepare ceramic-metallic technology to substitute, and obtain the better metal ceramic composite membrane of performance.
High-velocity oxy-fuel spraying method is the spraying method developing from traditional flame plating, its principle is: under the high pressure of 0.7-1.0MPa, utilize fuel, as hydrogen, ethane, propane, propylene or kerosene etc. and oxygen mix, in combustion chamber, light, make the violent gas expanding be subject to the constraint of water-cooled nozzle (Laval pipe) and form high-speed flame stream, raw material powder is sent into as nitrogen or helium etc. by rare gas element along axle center, combustion chamber, is heated and accelerates ejection.The speed of flame spraying can reach 6 times more than velocity of sound, and the speed of powder particle can reach 2 times more than velocity of sound.
By only comprising that high-velocity oxy-fuel (HVOF) system of a spray gun applies composite metal coated method on workpiece surface, be known.For example, CN102112645A discloses a kind of method for the adhesion sublayer of solution ceramics that applies in component surface by HVOF (High Velocity Oxygen Fuel), wherein said adhesion sublayer consists of sludge proof MCrAlY alloy conventionally, and this adhesion sublayer can consist of two different layers of fine granularity.EP1816229 (A1) discloses a kind of high velocity oxy-fuel thermal spray assembly.When workpiece and axle (A) are fixed angle or change under angles at 0 °-30 ° around axle (A), at workpiece, spray the supercoat of MCrAlX on as steam turbine engine blade.EP1942387 (A1) discloses two mechanical arms of a kind of use and turbine vane has been carried out to the method for automatic coating, and wherein spraying method can adopt HVOF system.Above-mentioned spraying method can mix matrix material, makes corresponding ratio premix powder, and then sprays, and can produce composite metal coated.But first this method cannot change powder constituent at any time, for two kinds of very large powder of fusing point difference, be also difficult to select suitable spraying temperature in addition.
Summary of the invention
One aspect of the present invention provides high-velocity oxy-fuel paint finishing, and it comprises: the first high-velocity oxy-fuel spray gun, for spraying pottery; And the second high-velocity oxy-fuel spray gun, for metal injection or metal alloy, the injection stream that wherein the first high-velocity oxy-fuel spray gun and the second high-velocity oxy-fuel spray gun eject is simultaneously overlapped in and covers workpiece surface to be coated, form coating, metal or metal alloy group through-thickness in coating changes, the closer to workpiece surface, metal or metal alloy content is higher.
The present invention also provides the method for preparing ceramic metal coating according to said system on the other hand, it comprises: by carrier gas, ceramic composition powder is sent into the first high-velocity oxy-fuel spray gun of high-velocity oxy-fuel paint finishing, fuel and oxygen are imported to this first high-velocity oxy-fuel spray gun, make ceramic composition powder mix combining combustion; By carrier gas, metal or metal alloy component powders is sent into the second high-velocity oxy-fuel spray gun of high-velocity oxy-fuel paint finishing, fuel and oxygen are imported to this second high-velocity oxy-fuel spray gun, make metal/alloy component powders mix combining combustion; Eject separately the first injection stream and the second injection stream with the first high-velocity oxy-fuel spray gun and the second high-velocity oxy-fuel spray gun simultaneously, and these two injection streams are overlapped in and cover workpiece surface to be coated, form thus coating, the metal or metal alloy component through-thickness in coating changes.
The present invention can change powder constituent at any time, content, spray angle, spraying temperature and other.
Accompanying drawing explanation
Fig. 1 has shown according to the sectional view of the high-velocity oxy-fuel paint finishing of one embodiment of the invention;
Fig. 2 a shown according to the microcosmic schematic diagram of the prepared ceramic metal coating of one embodiment of the invention, and this ceramic metal coating has the structure that continuous gradient distributes;
Fig. 2 b has shown that this ceramic metal coating has the structure of two sublayers according to the microcosmic schematic diagram of the prepared ceramic metal coating of another embodiment of the invention;
Fig. 3 has shown that its surface comprises Mo-Al according to the prepared sun power receiving tube of one embodiment of the invention
2o
3ceramic metal coating, and form different with thickness in a-quadrant with the coating in B region.
Embodiment
Unless otherwise defined, all technology used herein and scientific terminology have the identical implication of conventionally understanding with those skilled in the art of the invention.If the contradiction of existence, the definition providing with the application is as the criterion.
In with scope, in preferable range or when the form of preferred numerical upper limits and preferred numerical lower limits explains certain amount, concentration or other value or parameter, be to be understood that and be equivalent to specifically disclose in any scope by the upper limit or preferred value in any a pair of scope and any range lower limit or preferred value are combined, and do not consider whether specifically disclose in this scope.Unless otherwise noted, in numerical range listed herein, be intended to comprise the end points in scope, and all integers and mark within this scope.
When term " about " and " approximately " are when describing the end value of numerical value or scope, disclosed content is understood to include occurrence or related end value.
Unless otherwise indicated, all per-cent, umber, ratio etc. are all by weight herein.
Material, method and embodiment is herein all exemplary, and unless stated otherwise, should not be construed as restrictive.
Ceramic metal coating of below describe high-velocity oxy-fuel paint finishing of the present invention in detail, preparing by described paint finishing and preparation method thereof.
High-velocity oxy-fuel paint finishing
Fig. 1 is the sectional view of high-velocity oxy-fuel gun system of the present invention.High-velocity oxy-fuel paint finishing of the present invention comprises the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2, the first injection stream 7 that wherein the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 eject separately and the second injection stream 8 are overlapped in and cover workpiece surface to be coated and be not particularly limited according to the type of the first high-velocity oxy-fuel spray gun 1 of the present invention and the second high-velocity oxy-fuel spray gun 2, and can be identical or different, as long as the first high-velocity oxy-fuel spray gun 1 can be realized the spraying to ceramic composition of the present invention, and the second high-velocity oxy-fuel spray gun 2 can be realized the spraying to metal/alloy component of the present invention.The fuel that high-velocity oxy-fuel spray gun according to the present invention uses can be selected from the inflammable gas of ethane, propane and hydrogen, and preferably uses ethane.
As shown in Figure 1, the injection stream direction 5 of the normal direction 4 of workpiece surface 3 to be coated and the first high-velocity oxy-fuel spray gun 1 is angle a, the injection stream direction 6 of the normal direction 4 of workpiece surface 3 to be coated and the second high-velocity oxy-fuel spray gun 2 is angle b, wherein angle a and angle b are in the scope of 5 °-45 °, preferably in the scope of 10 °-30 °.If described angle is greater than 45 °, can reduce spray efficiency and coating quality.
As shown in Figure 1, should understand the injection stream direction 5 of the first high-velocity oxy-fuel spray gun 1, the injection stream direction of the second high-velocity oxy-fuel spray gun 26 can be in same plane or not in same plane with the normal direction 4 of workpiece surface 3 to be coated, or the injection stream direction 6 of the injection stream direction 5 of the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 can spatially be rotated an angle around the normal direction 4 of workpiece surface to be coated 3 respectively, this angle is preferably less than 20 °, be more preferably less than 10 °, be particularly preferably less than 5 °.In a preferred embodiment of the invention, the injection stream direction 5 of the first high-velocity oxy-fuel spray gun 1, the injection stream direction of the second high-velocity oxy-fuel spray gun 26 with the normal direction 4 of workpiece surface 3 to be coated in same plane, this plane is perpendicular to the longitudinal axis of tubular workpiece the direction of paper (in the Fig. 1 perpendicular to), and the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 lay respectively at normal direction 4 both sides of workpiece surface to be coated 3.In addition, in spraying process, workpiece to be coated can rotate by industrial machinery arm.By regulating and fix the relative position of the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 and spraying direction, can make the spraying area of the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 remain overlapping, this spraying area is at least a portion of workpiece surface 3.
In a preferred embodiment of the invention, the movement of the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 and spraying direction are controlled by programme controlled industrial machinery arm system, metal receiving tube also can, by time variable control angle of rotation and speed, can reach improved spray efficiency and accurate control thus simultaneously.The movement of mechanical arm can accurately be controlled by the setting of coordinate, and all automatic control programs can utilize for example program of Robcad to carry out off-line programing and simulation, and verify by on-line spray.In the middle of metal receiving tube, logical nitrogen is cooling in addition, in order to avoid coating affects quality because growth temperature is too high.
Coating forms and spraying raw material
High-velocity oxy-fuel paint finishing of the present invention can be widely used in the coating of so-called ceramic-metal composite coatings.Described ceramic-metal composite coatings is the coated material consisting of ceramic composition and metal/alloy component, and its object is to form the material of antiradar reflectivity and high-absorbility.Ceramic composition is not particularly limited, and it can be the stupalith of the type such as oxide compound, nitride, carbide, sulfide, silicide of metal, and can be selected from Al
2o
3, MoO
2, Y
2o
3, ZrO
2, SiO
2, AlN, BeO, Si
3n
4, BN, MoSi
2, CrSi
2, CoSi
2, WC, WSi
2, Ti
3n
4and TiN; Described metal/alloy component is also not particularly limited, and it is generally transition metal, and can be selected from Mo, Co, Fe, Ni, Cr, Ti, W and their alloy.The example of ceramic-metal composite coatings of the present invention comprises Mo-Al
2o
3and W-Al
2o
3.In order to improve the solar absorption efficiency of thermal-collecting tube, in the both sides of ceramic-metal composite coatings, can also increase infrared reflecting layer and anti-reflection layer, can be prepared by high-velocity oxy-fuel paint finishing of the present invention equally, it forms referring to CN101737982A.In a preferred embodiment of the invention, high-velocity oxy-fuel paint finishing of the present invention is used for spraying Mo-Al
2o
3ceramic-metal composite coatings.
By the prepared Mo-Al of high-velocity oxy-fuel paint finishing of the present invention
2o
3ceramic-metal composite coatings can be the continuous coating of gradient.Refer to Fig. 2 a, Fig. 2 a has shown according to the microcosmic schematic diagram of the prepared ceramic metal coating of one embodiment of the invention.Wherein the content of the ceramic composition (being represented by blank in figure) in ceramic metal coating and metal/alloy component particles (being represented by stain in figure) is respectively along the thickness direction distribution gradient of coating.By the prepared Mo-Al of high-velocity oxy-fuel paint finishing of the present invention
2o
3ceramic-metal composite coatings can be also laminated coating.Refer to Fig. 2 b, Fig. 2 b has shown that this ceramic metal coating has the structure of two sublayers according to the microcosmic schematic diagram of the prepared ceramic metal coating of another embodiment of the invention.Coating as shown in Figure 2 b, it has the sublayer that two differing materials form, and one of them sublayer is low metal volume content layer (LMVF), and another sublayer is high metal volume content layer (HMVF).In addition, by service routine, control, high-velocity oxy-fuel paint finishing of the present invention also can easily be prepared and has more sublayers, the continuous coating of gradient, thus along the thickness direction of coating, and Mo and Al in coating
2o
3the variation of granule content is more even, and then makes prepared Mo-Al
2o
3the performance of ceramic-metal composite coatings is better.Refer to Fig. 3, Fig. 3 has shown that its surface comprises Mo-Al according to the prepared sun power receiving tube of one embodiment of the invention
2o
3ceramic metal coating, and form different with thickness in a-quadrant with the coating in B region.The present invention can also the metal receiving tube of production example as described in US Patent No. 7607428.As shown in Figure 3, its A face in face of condensing apparatus and the optically focused of B face of carrying laser apparatus is than being different for the CSP receiving tube that US7607428 mentions, thus need to these two surface spraying heterogeneities or (with) coating of thickness.
Spraying raw material in above-mentioned situation is Mo and Al
2o
3powder.Mo powder diameter is not particularly limited, and it can be the particle of nanometer particle size or the particle of micron grain size.But the particle of considering nanometer particle size has very limited inertia conventionally, be difficult to thus spray and produce fine and close coating by high-velocity oxy-fuel, so in a preferred embodiment of the invention, Mo powder is the micron grain size particle that the particle reconstruct by 5-50nm size forms, be that particle diameter is in being greater than the scope of 2 μ m, preferably in the scope of 5 μ m-50 μ m, more preferably in the scope of 10 μ m-40 μ m, Al
2o
3powder adopts the particle of reconstruct micron grain size equally, and particle diameter is in being greater than the scope of 2 μ m, preferably in the scope of 5 μ m-50 μ m, more preferably in the scope of 10 μ m-40 μ m.The hollow powder that the particle of described particle diameter can have by commercially available nanoparticle raw materials is reconstructed into micron grain size is used as raw material powder, or such raw material powder is also commercially available, for example the reconstruct powder of Ying Fu Man.
Spraying step and parameter
At a preparation Mo-Al of the present invention
2o
3in the embodiment of ceramic-metal composite coatings, use the first high-velocity oxy-fuel spray gun 1 to spray Al
2o
3, and use the second high-velocity oxy-fuel spray gun 2 to spray Mo with preparation Mo-Al
2o
3ceramic-metal composite coatings.
Below only take this embodiment as example, concrete steps and the parameter selection of high-velocity oxy-fuel spraying method of the present invention are described.
Preparation Mo-Al
2o
3the method of ceramic-metal composite coatings can comprise the following steps:
By carrier gas, the Al of above-mentioned particle requirement will be met
2o
3powder is sent into the first high-velocity oxy-fuel spray gun 1, fuel and oxygen is imported to the first high-velocity oxy-fuel spray gun 1 simultaneously, makes described ceramic composition powder mix combining combustion;
By carrier gas, the described Mo powder that meets above-mentioned particle requirement is sent into the second high-velocity oxy-fuel spray gun 2, fuel and oxygen are imported to the second high-velocity oxy-fuel spray gun 2 simultaneously, make described metal/alloy component powders mix combining combustion; With
Make the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 eject separately the first injection stream 7 and the second injection stream 8, the first injection streams 7 and the second injection stream 8 and be overlapped in and cover workpiece surface to be coated 3, form thus coating 9 simultaneously.
It should be noted that before and after above-mentioned steps and there is no the restriction on order.Relative other thermospray mode (for example plasma spraying), the powder particle flight velocity of high-velocity oxy-fuel spraying is high, and ambient atmosphere is short duration of contact, seldom reacts with atmosphere.In addition, under many circumstances, the anti-oxidation effect of above-mentioned carrier gas or inadequate, further prevents Powder Oxidation so can produce by being attached to extra means (gas shroud) on spray gun the protective guard of rare gas element.Rare gas element is nitrogen, helium or argon gas for example.Under the protection that is sprayed on above-mentioned rare gas element of Mo powder, can further reduce Mo Powder Oxidation phenomenon in mixed firing and spraying process, thereby can save with respect to vacuum sputtering coating method the system component that uses vacuum chamber.
Granulometric composition in ceramic-metal composite coatings of the present invention is except can regulating by material choice, can be especially by changing the spray parameters in high-velocity oxy-fuel paint finishing of the present invention, as the translational speed of the support of the first high-velocity oxy-fuel spray gun 1 and the second high-velocity oxy-fuel spray gun 2 flow, temperature and jet velocity, injecting time and the spray gun of controlling by industrial machinery arm system and fixation workpiece separately and travel direction etc. regulate.
The oxygen of the first high-velocity oxy-fuel spray gun 1 of the present invention and gas flow ratio are generally 2-8, are preferably 4-6, and powder sending quantity is 10-100g/min, is preferably 20-60g/min, and concrete oxygen and gas flow ratio also can be determined according to coating composition.The oxygen of the second high-velocity oxy-fuel spray gun 2 and gas flow ratio are generally 2-8, are preferably 4-6, and powder sending quantity is 10-100g/min, is preferably 20-60g/min, and concrete oxygen and gas flow ratio also can be determined according to coating composition.Those skilled in the art know according to concrete coated component and determine the method that the parameter of above-mentioned each spray gun arranges, and can easily realize.
The jet velocity of the first high-velocity oxy-fuel spray gun 1 of the present invention is generally 300-1000m/s, is preferably 300-650m/s, more preferably 350-500m/s.The jet velocity of the second high-velocity oxy-fuel spray gun 2 is generally 300-1000m/s, is preferably 300-650m/s, more preferably 350-500m/s.
The injection temperature of the first high-velocity oxy-fuel spray gun 1 of the present invention is generally 2000-3200 ° of C, is preferably 2400-3000 ° of C, and actual temp also can be determined according to different powder fusing points and particle diameter.The injection temperature of the second high-velocity oxy-fuel spray gun 2 is generally 2000-3200 ° of C, is preferably 2400-3000 ° of C, and concrete temperature also can be determined according to different powder fusing points and particle diameter.
The thickness of coating 9 of the present invention is generally 100nm-10 μ m, is preferably 150nm-1000nm, and concrete coat-thickness also can be selected according to the configuration of system.
Industrial machinery arm Controlling System of the present invention can be controlled by automatic control program, for example, by Robcad program, carry out off-line programing and simulation, and verify by on-line spray.
Thus, the advantage of high-velocity oxy-fuel paint finishing of the present invention is following many aspects:
1, the structure of high-velocity oxy-fuel paint finishing of the present invention is easier than radio-frequency sputtering; by protection of inert gas, can avoid using the valve tube of large volume; and reduce thus the cost of paint finishing of the present invention, also greatly shortened the preparation required time of coating.
2, high-velocity oxy-fuel paint finishing of the present invention is easier to prepare ceramic-metal composite coatings, system with respect to single high-velocity oxy-fuel spray gun, the pre-mixing that does not need to carry out raw material powder can realize coating and prepares by operate two programme controlled high-velocity oxy-fuel spray guns simultaneously, thus with respect to single spraying gun system of the prior art, it is faster that it prepares speed, and production efficiency is higher.
3, high-velocity oxy-fuel paint finishing of the present invention is easier to control the composition of prepared ceramic-metal composite coatings, and coat composed Gradient distribution is more continuous.
4, by operate two simultaneously, by programme controlled high-velocity oxy-fuel spray gun, be easier to prepare on sun power receiving tube thickness and form inhomogeneous solar energy absorbing coating.
By accompanying drawing and embodiment, the present invention has been carried out to detail display and explanation above, yet the invention is not restricted to the embodiment that these have disclosed, other schemes that those skilled in the art therefrom derive also in protection scope of the present invention within.
Claims (14)
1. high-velocity oxy-fuel paint finishing, it comprises:
The first high-velocity oxy-fuel spray gun, for spraying pottery; And
The second high-velocity oxy-fuel spray gun, for metal injection or metal alloy, the injection stream that wherein the first high-velocity oxy-fuel spray gun and the second high-velocity oxy-fuel spray gun eject is simultaneously overlapped in and covers workpiece surface to be coated, form coating, metal or metal alloy group through-thickness in described coating changes, the closer to described workpiece surface, described metal or metal alloy content is higher.
2. high-velocity oxy-fuel paint finishing according to claim 1, the content of the ceramic composition in wherein said coating and metal/alloy component particles is respectively along the thickness direction distribution gradient of described coating, the closer to described workpiece surface, described metal or metal alloy content is higher.
3. high-velocity oxy-fuel paint finishing according to claim 1, sprays the coating of heterogeneity and/or thickness on two surfaces of its metal receiving tube at solar receiver.
4. high-velocity oxy-fuel paint finishing according to claim 1, wherein said coating has the sublayer that at least two differing materials form, one of them sublayer is low metal volume content layer, another sublayer is high metal volume content layer, and the described sublayer of close described workpiece surface is high metal volume content layer.
5. according to the arbitrary described high-velocity oxy-fuel paint finishing of claim 1-4, wherein said ceramic composition is selected from Al
2o
3, MoO
2, Y
2o
3, ZrO
2, SiO
2, AlN, BeO, Si
3n
4, BN, MoSi
2, CrSi
2, CoSi
2, WC, WSi
2and TiO
2, described metal/alloy component is selected from Mo, Co, Fe, Ni, Cr, Ti, W and their alloy.
6. the high-velocity oxy-fuel paint finishing described in right to use requirement 1-5 is prepared the method for ceramic metal coating, and it comprises:
By carrier gas, ceramic composition powder is sent into the first high-velocity oxy-fuel spray gun of described high-velocity oxy-fuel paint finishing, fuel and oxygen are imported to this first high-velocity oxy-fuel spray gun, make described ceramic composition powder mix combining combustion;
By carrier gas, metal or metal alloy component powders is sent into the second high-velocity oxy-fuel spray gun of described high-velocity oxy-fuel paint finishing, fuel and oxygen are imported to this second high-velocity oxy-fuel spray gun, make described metal/alloy component powders mix combining combustion; With
The first high-velocity oxy-fuel spray gun and the second high-velocity oxy-fuel spray gun eject the first injection stream and the second injection stream simultaneously separately, and these two injection streams are overlapped in and cover workpiece surface to be coated, form thus coating, the metal or metal alloy group through-thickness in described coating changes.
7. preparation method according to claim 6, wherein in each scope of comfortable 5 °-45 ° of angle of the angle of the injection stream direction of the normal direction of workpiece surface to be coated and the first high-velocity oxy-fuel spray gun and the normal direction of workpiece surface to be coated and the injection stream direction of the second high-velocity oxy-fuel spray gun.
8. preparation method according to claim 7, wherein in each scope of comfortable 10 °-30 ° of angle of the angle of the injection stream direction of the normal direction of workpiece surface to be coated and the first high-velocity oxy-fuel spray gun and the normal direction of workpiece surface to be coated and the injection stream direction of the second high-velocity oxy-fuel spray gun.
9. preparation method according to claim 6, the particle diameter of wherein said ceramic composition and/or described metal/alloy component is in the scope of 5 μ m-50 μ m.
10. preparation method according to claim 6, carries out under the protection that is sprayed on the rare gas element that is selected from nitrogen, helium or argon gas of wherein said metal/alloy component.
11. preparation methods according to claim 6, wherein in the interval of the oxygen of the first and second high-velocity oxy-fuel spray guns and each comfortable 2-8 of gas flow proportional range.
12. preparation methods according to claim 6, the wherein powder sending quantity of the first and second high-velocity oxy-fuel spray guns 10-100g/min that respectively does for oneself.
13. preparation methods according to claim 6, the wherein jet velocity of the first and second high-velocity oxy-fuel spray guns 300-1000m/s that respectively does for oneself.
14. preparation methods according to claim 6, the wherein injection temperature of the first and second high-velocity oxy-fuel spray guns 2000-3200 ° of C that respectively do for oneself.
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| CN114453154A (en) * | 2022-02-21 | 2022-05-10 | 中北大学 | Spray particle protection method and supersonic speed spray gun |
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| CN104831209A (en) * | 2015-05-09 | 2015-08-12 | 芜湖鼎恒材料技术有限公司 | Fe-Al2O3-Mo nanocoating material and preparation method thereof |
| CN106089808A (en) * | 2016-07-28 | 2016-11-09 | 中南大学 | A kind of blade diffuser with trailing edge structures before swallow-tail form and formative method thereof |
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| CN111560579A (en) * | 2019-03-28 | 2020-08-21 | 广东光泰激光科技有限公司 | Anti-cracking low-temperature spraying process |
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| CN116190920A (en) * | 2023-04-26 | 2023-05-30 | 宁德卓高新材料科技有限公司 | Coated diaphragm and preparation method and application thereof |
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