CN109338264B - Preparation method and system of metal alloy coating in atmospheric atmosphere - Google Patents
Preparation method and system of metal alloy coating in atmospheric atmosphere Download PDFInfo
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- CN109338264B CN109338264B CN201811444409.7A CN201811444409A CN109338264B CN 109338264 B CN109338264 B CN 109338264B CN 201811444409 A CN201811444409 A CN 201811444409A CN 109338264 B CN109338264 B CN 109338264B
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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
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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
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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Abstract
The embodiment of the invention provides a method and a system for preparing a metal alloy coating in an atmospheric atmosphere, which are particularly used for carrying out operations of rust removal, dirt removal, oil removal and sand blasting roughening on the surface of a substrate to be sprayed; feeding metal alloy powder into high-temperature plasma jet to enable the metal alloy powder to enter a molten state under the action of the high-temperature plasma jet, wherein the metal alloy powder contains X element powder with preset content, and the reducibility of the X element is stronger than that of other components in the metal alloy powder; and spraying the plasma jet carrying the metal alloy powder in a molten state to the surface of the substrate in the atmosphere, wherein the molten particles in the plasma jet reach the surface of the substrate after the flying distance of 60-200 mm. Because the reducibility of the X element is stronger than that of other elements, the X element can be preferentially oxidized in the high-temperature plasma jet and consumes oxygen introduced by the jet, thereby solving the problem of poor consistency of the performance of the metal alloy coating prepared in the atmospheric atmosphere.
Description
Technical Field
The invention relates to the technical field of metal processing, in particular to a method and a system for preparing a metal alloy coating in an atmospheric atmosphere.
Background
Plasma spraying and powder flame spraying are important methods for preparing metal alloy coatings and improving the service performance of metal materials. In the coating preparation process, certain components and structural powder are fed into a heat source such as plasma jet or combustion flame through a powder feeding mechanism, the powder is heated to a molten or nearly molten state by a high-temperature and high-speed flame flow-shaped heat source such as high-temperature plasma jet or flame flow, the powder is accelerated to be endowed with a certain speed, and then the powder sequentially collides with a substrate and is sequentially deposited on the substrate to form a coating with a certain thickness.
When the spraying process is carried out in the atmosphere, although the spraying process is very simple and convenient, atmospheric components are inevitably involved in high-temperature flame flow to enable the flame flow to have strong oxidizing property, elements in the molten droplets and oxygen involved in the high-temperature flame flow are subjected to oxidation reaction to generate oxides in the process of further heating and accelerating the molten droplets in the flame flow with the strong oxidizing property, the oxides and unoxidized molten droplets are deposited and mixed in a coating, so that the components of the coating are changed, the components of the coating deviate from the components of powder, meanwhile, the uniformity and consistency of the components of the coating are difficult to guarantee due to poor oxidation controllability, and the consistency of the performance of the coating is obviously affected by oxidation. The specific effects are as follows:
first, generally because molten metals have poor wettability to oxides, depositing oxides with the metal that are incorporated into the coating will prevent direct contact between the metal alloy particles, thereby reducing the cohesive strength within the coating and the coating/substrate bond strength; as the content of oxide inclusions increases, the area of direct contact of the molten liquid metal with the metal particles decreases, resulting in a decrease in the interfacial area forming the metallurgical bond, significantly reducing the bond or cohesive strength.
Secondly, the coating prepared by spraying in the atmospheric atmosphere has high oxide content in the metal coating, and although the metal material is a material with good shaping and toughness, the coating has brittle characteristics, and the mechanical properties of the coating are obviously reduced, so that the service properties of the coating, such as wear resistance, erosion resistance and the like, are deteriorated.
And thirdly, when the content of the oxide of the metal alloy coating is higher, the high-temperature oxidation resistance and the corrosion resistance of the coating are obviously reduced.
Disclosure of Invention
In view of this, the invention provides a method and a system for preparing a metal alloy coating in an atmospheric atmosphere, so as to solve the problem that the consistency of the performance of the metal alloy coating prepared in the atmospheric atmosphere is poor.
In order to solve the problems, the invention discloses a preparation method of a metal alloy coating in an atmospheric atmosphere, which comprises the following steps:
carrying out rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of a matrix to be sprayed;
sending metal alloy powder into high-temperature plasma jet to enable the metal alloy powder to enter a molten state under the action of the high-temperature plasma jet, wherein the metal alloy powder contains X element powder with a preset content, the reducibility of the X element is stronger than that of other components in the metal alloy powder, and the oxide of the X element is in a vaporization state in the high-temperature plasma jet;
and spraying the high-temperature plasma jet carrying the metal alloy powder in a molten state to the surface of the substrate in an atmospheric atmosphere, wherein the high-temperature plasma jet reaches the surface of the substrate after passing through a flight distance of 60-200 mm.
Optionally, the temperature of the molten particles in the high temperature plasma jet is greater than 1900 ℃.
Optionally, the X element is a boron element.
Optionally, the metal alloy powder is iron-based alloy powder, cobalt-based metal powder, copper-based metal powder or aluminum-based metal powder.
Optionally, the mass percentage of the boron element in the metal alloy powder is 0.5 wt% to 3.4 wt%.
Optionally, the metal alloy powder is a self-fluxing alloy powder with a boron content of more than 3.4%.
In addition, the invention also provides a preparation system of the metal alloy coating in the atmospheric atmosphere, which comprises the following steps:
the pretreatment equipment is used for carrying out rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of the matrix to be sprayed;
the powder conveying equipment is used for conveying metal alloy powder into high-temperature plasma jet so that the metal alloy powder enters a molten state under the action of the high-temperature plasma jet, the metal alloy powder contains X element powder with preset content, the reducibility of the X element is stronger than that of other components in the metal alloy powder, and the oxide of the X element is in a gas state in the high-temperature plasma jet;
and the plasma equipment is used for spraying high-temperature plasma jet carrying the metal alloy powder in a molten state to the surface of the substrate in an atmospheric atmosphere, and the high-temperature plasma jet reaches the surface of the substrate after passing through a flight distance of 60-200 mm.
Optionally, the temperature of the molten particles in the high temperature plasma jet is greater than 1900 ℃.
Optionally, the X element is a boron element.
Optionally, the metal alloy powder is iron-based alloy powder, cobalt-based metal powder, copper-based metal powder or aluminum-based metal powder.
Optionally, the mass percentage of the boron element in the metal alloy powder is 0.5 wt% to 3.4 wt%.
Optionally, the metal alloy powder is a self-fluxing alloy powder with a boron content of more than 3.4%.
According to the technical scheme, the invention provides the preparation method and the system of the metal alloy coating in the atmospheric atmosphere, and the method and the system are particularly used for carrying out the operations of derusting, decontamination, deoiling and sand blasting roughening on the surface of the matrix to be sprayed; feeding metal alloy powder into high-temperature plasma jet to enable the metal alloy powder to enter a molten state under the action of the high-temperature plasma jet, wherein the metal alloy powder contains X element powder with preset content, and the reducibility of the X element is stronger than that of other components in the metal alloy powder; and spraying the plasma jet carrying the metal alloy powder in a molten state to the surface of the substrate in the atmosphere, wherein the plasma jet reaches the surface of the substrate after the flight distance of 60-200 mm. Because the reducibility of the X element is stronger than that of other elements, the X element can be preferentially oxidized and vaporized and evaporated in the high-temperature plasma jet, and oxygen introduced by the jet can be consumed during oxidation, so that the oxidation of other metals is avoided, oxides cannot exist in the metal alloy coating, and the problem that the consistency of the performance of the metal alloy coating prepared in the atmospheric atmosphere is poor is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart illustrating steps of a method for forming a metal alloy coating in an atmospheric environment according to an embodiment of the present invention;
FIG. 2a is an electron microscope photograph of the cross-sectional structure of a NiCrB coating prepared by the method of the present invention;
FIG. 2b is an electron micrograph of the cross-sectional structure of a NiCr coating prepared by a conventional method;
FIG. 3a is an electron micrograph of a NiCrB coating made by the method of the present invention;
FIG. 3b is an electron micrograph of the cross-sectional structure of a NiCr coating prepared by a conventional method;
FIG. 4a is a low magnification electron micrograph of the cross-sectional structure of a NiCrB coating prepared using the method of the present invention at a spray distance of 200 mm;
FIG. 4b is a high power electron micrograph of a cross-sectional structure of a NiCrB image prepared using the method of the present invention at a spray distance of 200 mm.
Fig. 5 is a block diagram of a system for preparing a metal alloy coating in an atmospheric atmosphere according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a flowchart illustrating steps of a method for preparing a metal alloy coating in an atmospheric atmosphere according to an embodiment of the present invention.
Referring to fig. 1, a method for preparing a metal alloy coating according to this embodiment is to coat a corresponding metal coating on a surface of a substrate by using a high-temperature plasma jet in an atmospheric atmosphere, and the specific preparation method includes the following steps:
and S1, performing rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of the base body.
The rust, dirt and oil stain can cause adverse interference on the coated metal coating, particularly the adhesive force of the metal coating is reduced, the rust can also become a rust point under the metal coating, and the coated metal coating is a rust inducing point, so the rust removing, dirt removing and oil removing operation is required, the rust can be ground off by using grinding equipment during specific operation, the rust can also be removed by using acid liquor, and the dirt and the oil stain can be cleaned by using corresponding solvents.
In addition, in order to improve the adhesion of the coated metal coating, the surface of the substrate may be subjected to a blasting operation using a blasting device to reduce the smoothness of the surface, thereby effectively improving the adhesion.
And S2, feeding the metal alloy powder into the high-temperature plasma jet.
The metal alloy powder is fed into high-temperature plasma jet, and the temperature of the high-temperature plasma jet can reach more than 10000 ℃, so that the metal alloy powder enters the jet and then rapidly enters a molten state to form high-temperature molten particles with the temperature higher than 1900 ℃.
The metal alloy powder contains X element powder with preset content, and the key point is that the X element is easier to be oxidized than the rest components of the metal alloy powder, namely the reducibility of the X element is stronger than that of the rest components of the metal alloy powder, and the oxide of the X element is easier to be vaporized in high-temperature plasma jet. In the present application, boron is preferred as the X element.
The metal alloy powder in the present application may be an iron-based alloy powder, a cobalt-based metal powder, a copper-based metal powder, or an aluminum-based metal powder. For the alloy powder, the mass percentage of the boron element powder in the metal alloy powder is 0.5-3.4 wt%.
In addition, the metal alloy powder can also be self-fluxing alloy powder containing boron and silicon, and the content of the boron is greater than 3.4%.
And S3, spraying the high-temperature plasma jet to the surface of the substrate in the atmosphere.
The high-temperature plasma jet at this moment already contains the high-temperature melting particles formed by high-temperature melting of the metal alloy powder, and at this moment, the high-temperature plasma jet flies for a preset distance and then is sprayed on the surface of the substrate, and the preset distance can be selected from 60-200 mm. The distance is selected to provide an effective time for the metal alloy powder to enter the molten elevated temperature state.
According to the technical scheme, the embodiment provides the preparation method of the metal alloy coating in the atmospheric atmosphere, and the method specifically comprises the steps of carrying out rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of a substrate to be sprayed; feeding metal alloy powder into high-temperature plasma jet to enable the metal alloy powder to enter a molten high-temperature state under the action of the high-temperature plasma jet, wherein the metal alloy powder contains X element powder with preset content, and the reducibility of the X element is stronger than that of other components in the metal alloy powder; and spraying the plasma jet carrying the metal alloy powder in a molten state to the surface of the substrate in the atmosphere, wherein the plasma jet reaches the surface of the substrate after the flight distance of 60-200 mm. Because the reducibility of the X element is stronger than that of other elements, the X element can be preferentially oxidized and vaporized and evaporated in the high-temperature plasma jet, and oxygen introduced by the jet can be consumed during oxidation, so that the oxidation of other metals is avoided, oxides cannot exist in the metal alloy coating, and the problem that the consistency of the performance of the metal alloy coating prepared in the atmospheric atmosphere is poor is solved.
The size of the high-temperature molten particles generated in the above embodiment is between 10 μm and 150 μm, and the thickness of the formed coating is between 30 μm and 1000 μm.
The following is a detailed description of the present application when implemented:
FIG. 2a shows the coating formed under the following conditions: by using spherical Ni-20Cr-3B powder having a particle size of 50 to 100 μm and plasma spraying in an atmospheric atmosphere with an arc power of 30kW and a spraying distance of 80mm, as a comparison, FIG. 2B shows a coating prepared from Ni-20Cr powder having substantially the same particle size, and comparing the cross-sectional structure of the coating, it can be seen that the oxide content in the boron-containing powder-sprayed coating is very limited and the coating is dense, whereas the oxide content in the metallic coating prepared under the same conditions using the conventional Ni-20Cr powder is high with a gray contrast, which is a characteristic of the coating prepared using the atmospheric plasma spraying using the conventional metal alloy powder, and the oxide present in the coating can be more clearly seen using a high magnification photograph as shown in FIG. 3B. The cross-sectional structure of the NiCr alloy coating produced by the method of the present invention under the same conditions was observed at a higher magnification as shown in fig. 3a, and substantially no oxide was observed in the dense coating, and the particulate material with darker contrast observed at a higher magnification in the cross-section was boride.
As shown in FIG. 4a, the coating was prepared using spherical Ni-20Cr-4B powder having a particle size of 45-75 μm by atmospheric plasma spraying at an arc power of 36kW and a spraying distance of 200 mm. The cross-section structure picture of the coating is prepared by adopting a scanning electron microscope in a back scattering mode, and the oxide in the coating is presented in the cross-section structure with gray contrast and is distributed at the particle interface in the coating. From the cross-sectional structure of the coating at different multiples, it can be found that even if the spraying distance reaches 200mm, the oxide content of the boron-containing powder atmospheric plasma sprayed coating is very limited, and the granular substances distributed in the particles observed at high multiples are confirmed to be boride through analysis. Moreover, because no oxide film exists between the coating particle layers, the bonding between the particles is tight, and the cohesive strength of the coating is high, as shown in fig. 4a and 4b respectively.
When spherical Ni-20Cr-1B powder having a particle size of 45 to 75 μm was used, a coating was prepared by atmospheric plasma spraying at an arc power of 36kW and a spraying distance of 130mm, respectively. The cross-section structure picture of the coating is prepared by adopting a scanning electron microscope in a back scattering mode, and the oxide in the coating is presented in the cross-section structure with gray contrast and is distributed at the particle interface in the coating. Analysis of the cross-sectional structure of the coating revealed that the oxide content of the coating sprayed by atmospheric plasma was very limited.
When a coating was prepared using a Ni18Cr3.5Si3B powder having a particle size of 45 to 100. mu.m under atmospheric plasma spraying, the oxygen content of the coating was measured and found to be < 0.15%.
When using an iron-based powder containing 3.5% of B element with a particle size of 30-75 μm and using atmospheric plasma spraying to produce a coating, the oxygen content of the coating is only about 0.1% by chemical analysis, whereas the oxygen content of conventional coatings is more than 0.5% by weight.
When copper-based powder containing 1.5% of boron is adopted, plasma spraying is adopted, and after the coating is sprayed in the atmosphere of 30kW, the oxygen content of the copper-based coating is only measured to be 0.1%, and the conductivity of the coating is obviously higher than that of the coating prepared by the traditional powder.
When the coating was prepared using 2.5 wt% boron-containing cobalt-based powder by a plasma spraying method at 34kW, the structure of the coating cross section was observed, and it was found that there was almost no oxide on the coating cross section.
When the NiCrAlY coating is prepared by spraying Ni-20Cr-10Al-1Y powder of a nickel-based superalloy with the boron content of 1.0 wt% in an atmosphere at a spraying distance of 150mm and a plasma arc power of 34kW, the measurement of the coating components shows that the content of other elements is basically unchanged except the boron content is reduced to below 0.4 wt%. The study of the high temperature oxidation kinetics of the coating showed that the oxidation kinetics of the coating were comparable to that of a NiCrAlY block. The NiCrAlY high-temperature alloy coating sprayed by plasma in the atmosphere has excellent high-temperature oxidation resistance, can be used as a high-temperature oxidation resistance or high-temperature corrosion resistance coating, and can also be used as a high-temperature alloy bonding layer of a thermal barrier coating of a high-temperature gas turbine
When cobalt-based high-temperature alloy Co-21Cr-32Ni-8Al-0.5Y powder with the boron content of 1.2 wt% is adopted, a CoNiCrAlY coating is prepared by spraying in an atmosphere at the spraying distance of 160mm and the plasma arc power of 38kW, and the measurement of the coating components shows that the content of other elements is basically unchanged except that the boron content is reduced by below 0.6 wt%. The research on the high-temperature oxidation kinetics of the coating shows that the oxidation kinetics of the coating is equivalent to that of a CoNiCrAlY block, and shows that the CoNiCrAlY high-temperature alloy coating sprayed by plasma in the atmosphere has excellent high-temperature oxidation resistance, can be used as a high-temperature oxidation resistance or high-temperature corrosion resistance coating, and can also be used as a high-temperature alloy bonding layer of a high-temperature gas turbine thermal barrier coating.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Example two
Fig. 5 is a block diagram of a system for preparing a metal alloy coating in an atmospheric atmosphere according to an embodiment of the present invention.
Referring to fig. 5, the system for preparing a metal alloy coating according to the present embodiment is to apply a corresponding metal coating on a surface of a substrate by using a high-temperature plasma jet in an atmospheric atmosphere, and includes a pretreatment apparatus 10, a powder delivery apparatus 20, and a plasma apparatus 30.
The pretreatment equipment is used for carrying out rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of the base body.
The rust, dirt and oil stain can cause adverse interference on the coated metal coating, particularly the adhesive force of the metal coating is reduced, the rust can also become a rust point under the metal coating, and the coated metal coating is a rust inducing point, so the rust removing, dirt removing and oil removing operation is required, the rust can be ground off by using grinding equipment during specific operation, the rust can also be removed by using acid liquor, and the dirt and the oil stain can be cleaned by using corresponding solvents.
In addition, in order to improve the adhesion of the coated metal coating, the surface of the substrate may be subjected to a blasting operation using a blasting device to reduce the smoothness of the surface, thereby effectively improving the adhesion.
The powder delivery apparatus is used to deliver metal alloy powder into the high temperature plasma jet.
The metal alloy powder is fed into the high-temperature plasma jet, and the temperature of the high-temperature plasma jet can reach more than 10000 ℃, so that the metal alloy powder enters the jet and then rapidly enters a molten state to form high-temperature molten particles.
The metal alloy powder contains X element powder with preset content, and the key point is that the X element is easier to be oxidized than the rest components of the metal alloy powder, namely the reducibility of the X element is stronger than that of the rest components of the metal alloy powder, and the oxide of the X element is easier to be vaporized in high-temperature plasma jet. In the present application, boron is preferred as the X element.
The metal alloy powder in the present application may be an iron-based alloy powder, a cobalt-based metal powder, a copper-based metal powder, or an aluminum-based metal powder. For the alloy powder, the mass percentage of the boron element powder in the metal alloy powder is 0.5-3.4 wt%.
In addition, the metal alloy powder can also be self-fluxing alloy powder containing boron and silicon, and the content of the boron is greater than 3.4%.
The plasma apparatus is used to spray a high temperature plasma jet toward the surface of the substrate in an atmospheric atmosphere.
The high-temperature plasma jet at this moment already contains the high-temperature melting particles formed by high-temperature melting of the metal alloy powder, and at this moment, the high-temperature plasma jet flies for a preset distance and then is sprayed on the surface of the substrate, and the preset distance can be selected from 60-200 mm. The distance is selected to provide an effective time for the metal alloy powder to enter the molten state.
According to the technical scheme, the embodiment provides the preparation system of the metal alloy coating in the atmospheric atmosphere, and the system is particularly used for carrying out rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of the base body to be sprayed; feeding metal alloy powder into high-temperature plasma jet to enable the metal alloy powder to enter a molten state under the action of the high-temperature plasma jet, wherein the metal alloy powder contains X element powder with preset content, and the reducibility of the X element is stronger than that of other components in the metal alloy powder; and spraying the plasma jet carrying the metal alloy powder in a molten state to the surface of the substrate in the atmosphere, wherein the plasma jet reaches the surface of the substrate after the flight distance of 60-200 mm. Because the reducibility of the X element is stronger than that of other elements, the X element can be preferentially oxidized and vaporized and evaporated in the high-temperature plasma jet, and oxygen introduced by the jet can be consumed during oxidation, so that the oxidation of other metals is avoided, oxides cannot exist in the metal alloy coating, and the problem that the consistency of the performance of the metal alloy coating prepared in the atmospheric atmosphere is poor is solved.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The technical solutions provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (4)
1. A preparation method of a metal alloy coating in an atmospheric atmosphere is characterized by comprising the following steps:
carrying out rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of a matrix to be sprayed;
sending metal alloy powder into high-temperature plasma jet to enable the metal alloy powder to enter a molten state under the action of the high-temperature plasma jet, wherein the metal alloy powder contains X element powder with a preset content, the reducibility of the X element is stronger than that of other components in the metal alloy powder, and the oxide of the X element is in a vaporization state in the high-temperature plasma jet; wherein, the X element can be preferentially oxidized and vaporized and evaporated in the high-temperature plasma jet, and oxygen introduced by the jet can be consumed during oxidation, so that oxidation of other components is avoided; the X element is boron element;
the mass percentage of the boron element in the metal alloy powder is 0.5-3.4 wt%; the temperature of the molten particles of the high temperature plasma jet is greater than 1900 ℃;
and spraying the high-temperature plasma jet carrying the metal alloy powder in a molten state to the surface of the substrate in an atmospheric atmosphere, wherein the high-temperature plasma jet reaches the surface of the substrate after passing through a flight distance of 60-200 mm.
2. The method of claim 1, wherein the metal alloy powder is an iron-based alloy powder, a cobalt-based metal powder, a copper-based metal powder, or an aluminum-based metal powder.
3. A preparation system of a metal alloy coating under an atmospheric atmosphere is characterized by comprising:
the pretreatment equipment is used for carrying out rust removal, dirt removal, oil removal and sand blasting roughening operation on the surface of the matrix to be sprayed;
the powder conveying equipment is used for conveying metal alloy powder into high-temperature plasma jet so that the metal alloy powder enters a molten state under the action of the high-temperature plasma jet, the metal alloy powder contains X element powder with preset content, the reducibility of the X element is stronger than that of other components in the metal alloy powder, and the oxide of the X element is in a gas state in the high-temperature plasma jet; the X element is boron element; the mass percentage of the boron element in the metal alloy powder is 0.5-3.4 wt%;
the plasma equipment is used for spraying high-temperature plasma jet carrying the metal alloy powder in a molten state to the surface of the base body in an atmospheric atmosphere, the high-temperature plasma jet reaches the surface of the base body after the flight distance of 60-200 mm, wherein the X element is preferentially oxidized and vaporized and evaporated in the high-temperature plasma jet, and oxygen introduced by the jet is consumed during oxidation, so that oxidation of other components is avoided;
the temperature of the molten particles of the high temperature plasma jet is greater than 1900 ℃.
4. The manufacturing system of claim 3, wherein the metal alloy powder is an iron-based alloy powder, a cobalt-based metal powder, a copper-based metal powder, or an aluminum-based metal powder.
Priority Applications (1)
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