CN111893417B - Preparation method of anti-ablation coating of titanium alloy gun barrel - Google Patents
Preparation method of anti-ablation coating of titanium alloy gun barrel Download PDFInfo
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- CN111893417B CN111893417B CN202010892017.8A CN202010892017A CN111893417B CN 111893417 B CN111893417 B CN 111893417B CN 202010892017 A CN202010892017 A CN 202010892017A CN 111893417 B CN111893417 B CN 111893417B
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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
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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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
- C23C4/126—Detonation spraying
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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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- 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
- C23C4/14—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
- C23C4/16—Wires; Tubes
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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
- C23C4/18—After-treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention belongs to the field of titanium alloy protective coatings, and relates to a preparation method of an anti-ablation coating of a titanium alloy artillery barrel. According to the invention, the Ni-based metal and TaC composite coating is prepared on the inner wall surface of the titanium alloy gun barrel by adopting a thermal spraying technology, and the induction remelting treatment is carried out on the composite coating by adopting an inner hole induction remelting technology, so that the interface of the coating and a titanium alloy matrix forms metallurgical bonding, the coating density and the coating hardness are improved, the ablation cycle at 1350 ℃ is not peeled off for more than 10 times, and the service life of the titanium alloy gun barrel is obviously prolonged.
Description
Technical Field
The invention belongs to the field of titanium alloy protective coatings, and particularly relates to a preparation method of an anti-ablation coating of a titanium alloy artillery barrel.
Background
The titanium alloy has the advantages of low density, high specific strength, good corrosion resistance and the like, and has wide application prospect in the fields of aerospace, weapons and ships. After the titanium alloy material is adopted to replace a steel gun barrel, the weight-reducing efficiency of more than 40% can be obtained by replacing the titanium alloy material with the same size, and the application prospect is huge. The gun barrel is subjected to the action of multiple factors of thermal ablation, chemical ablation and mechanical abrasion in the launching process, and the titanium alloy material has insufficient oxidation resistance, ablation resistance and scouring resistance at high temperature. In the prior art, the coating prepared on the inner wall of the titanium alloy gun barrel by adopting a thermal spraying process is influenced by the space size of the inner wall, the optimal thermal spraying process state cannot be achieved, and the obtained coating has poor bonding strength and high porosity, so that the service life of the gun barrel is short. The preparation technology of the anti-ablation coating suitable for protecting the inner wall of the titanium alloy artillery barrel is urgently needed to be developed.
Disclosure of Invention
The purpose of the invention is: the process method can be used for carrying out anti-ablation protection on the inner wall of the titanium alloy gun barrel so as to achieve the purpose of prolonging the service life of the titanium alloy gun barrel.
In order to solve the technical problem, the technical scheme of the invention is as follows:
a preparation method of an anti-ablation coating of a titanium alloy artillery barrel comprises the following steps:
step one, cleaning and drying the whole titanium alloy gun barrel;
secondly, spraying a nickel-based alloy and tantalum carbide composite coating on the inner wall surface of the gun barrel, and controlling the thickness of the composite coating to be 0.3-0.6 mm; the content of the composite coating tantalum carbide is 1-5%;
preheating a composite coating area, controlling the temperature of a matrix to be 400-500 ℃, then increasing the output power, carrying out induction remelting on the surface of the coating, controlling the temperature of the matrix to be 500-800 ℃ in the remelting process, forming metallurgical bonding between the coating and the titanium alloy, wherein the density of the composite coating reaches more than 99.5%, and the hardness of the composite coating is not lower than 600HV;
step four, performing atmosphere protection stress relief annealing on the remelted gun barrel, wherein the annealing temperature is 400 ℃;
and fifthly, machining the composite coating area, wherein the surface smoothness of the coating is not lower than Ra0.8.
Preferably, the step one also comprises the operation of thoroughly cleaning the inner wall surface of the gun barrel by using an alkaline cleaning agent to remove oil and impurities.
Preferably, the gun barrel is acid washed.
Preferably, the composite coating is sprayed in the second step by adopting a thermal spraying process.
Preferably, the thermal spray process is preferably explosion spray and bore plasma spray
Preferably, the induction remelting is carried out in the third step by using an inner hole high-frequency induction remelting technology. The technical parameters of the inner hole induction remelting are as follows: the electromagnetic oscillation frequency is selected to be 400KHZ, the gap between the induction coil and the matrix is 5-20 mm, and the moving speed is 1-50 mm/s.
Preferably, in the fourth step, the protective atmosphere is argon, the flow of the argon is 5 to 30sccm, and the annealing time is 1 to 24 hours.
Preferably, the composite coating region is machined by deep-hole milling.
Preferably, the nickel-based alloy is NiCoCrAlY or NiCrAlY.
The invention has the beneficial effects that:
the method combining the thermal spraying of the self-fluxing alloy and the induction remelting overcomes the problems that the coating prepared on the inner wall surface of the titanium alloy gun barrel by adopting a thermal spraying technology is low in bonding degree and easy to strip, the coating and the substrate interface form metallurgical bonding, the compactness and hardness of the coating are improved remarkably, and the service life of the titanium alloy gun barrel is prolonged; meanwhile, the process method has the advantages of simple process, strong operability, low cost and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.
Features of various aspects of embodiments of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples thereof. The present invention is not limited to any particular arrangement or method provided below, but rather covers all product structures, any modifications, alterations, etc. of the method covered without departing from the spirit of the invention.
In the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention. The method for preparing the anti-ablation coating of the titanium alloy artillery barrel according to the invention is described below with reference to specific examples.
Example 1
(1) Thoroughly cleaning the titanium alloy gun barrel by using an LCX-52 cleaning agent;
(2) Immersing the cleaned titanium alloy gun tube in an acid washing solution, wherein the concentration of nitric acid in the acid washing solution is 200mL/L, the acid washing temperature is 60 ℃, and the acid washing time is 5min; after acid washing, washing with flowing water, and drying;
(3) And spraying a mixed coating containing NiCoCrAlY and TaC on the inner wall surface of the titanium alloy gun barrel by adopting an explosion spraying process, wherein the content of TaC is 4%. The adopted explosion spraying process parameters are as follows: the oxygen-fuel ratio was 1.1, the amount of the gun charged was 50%, and the spraying distance was 200mm. The coating thickness was made 0.5mm.
(4) And preheating the coating by adopting an inner hole induction remelting technology, wherein the preheating temperature is 450 ℃, the preheating time is 10min, the output power is 20kW, and the moving speed is controlled at 50 mm/s. Then, the output power is increased to 40kW, the moving speed is adjusted to 20 mm/sec, the substrate temperature is controlled to 600 ℃, and the remelting time is 30 seconds.
(5) And (3) performing stress relief annealing on the titanium alloy gun barrel by adopting an argon protective atmosphere, wherein the argon flow is 20sccm, the annealing temperature is 400 ℃, and the annealing time is 24 hours.
(6) Deep hole grinding is adopted to process the coating area to the final size, and the surface finish of the coating is Ra0.4
The properties of the obtained coating were as follows:
example 2
(1) Thoroughly cleaning the titanium alloy gun barrel by using an LCX-52 cleaning agent;
(2) Immersing the cleaned titanium alloy gun tube in an acid washing solution, wherein the concentration of nitric acid in the acid washing solution is 300mL/L, the acid washing temperature is 60 ℃, and the acid washing time is 1min; after pickling, washing with flowing water, and drying;
(3) And spraying a mixed coating containing NiCrAlY and TaC on the inner wall surface of the titanium alloy gun barrel by adopting an explosion spraying process, wherein the content of TaC is 4%. The adopted explosion spraying process parameters are as follows: the oxygen-fuel ratio was 1.0, the amount of the gun charged was 55%, and the spraying distance was 200mm. The coating thickness was 0.4mm.
(4) And preheating the coating by adopting an inner hole induction remelting technology, wherein the preheating temperature is 500 ℃, the preheating time is 5min, the output power is 15kW, and the moving speed is controlled at 20 mm/s. Then, the output power is increased to 50kW, the moving speed is adjusted to 10 mm/s, the temperature of the substrate is controlled to 800 ℃, and the remelting time is 40 seconds.
(5) And (3) performing stress relief annealing on the titanium alloy gun barrel by adopting an argon protective atmosphere, wherein the argon flow is 10sccm, the annealing temperature is 400 ℃, and the annealing time is 4 hours.
(6) Deep hole grinding is adopted to process the coating area to the final size, and the surface finish of the coating is Ra0.4
The properties of the obtained coating were as follows:
finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (4)
1. A preparation method of an anti-ablation coating of a titanium alloy artillery barrel is characterized by comprising the following steps: the preparation method comprises the following steps:
step one, cleaning and drying the whole titanium alloy gun barrel; pickling the gun barrel;
secondly, spraying a nickel-based alloy and tantalum carbide composite coating on the inner wall surface of the gun barrel, and controlling the thickness of the composite coating to be 0.3-0.6 mm; the content of the composite coating tantalum carbide is 1-5%; the nickel-based alloy is NiCoCrAlY or NiCrAlY;
spraying the composite coating by adopting explosion spraying and inner hole plasma spraying thermal spraying processes;
preheating a composite coating area, controlling the temperature of a matrix to be 400-500 ℃, then increasing the output power, carrying out induction remelting on the surface of the coating, controlling the temperature of the matrix to be 500-800 ℃ in the remelting process, forming metallurgical bonding between the coating and the titanium alloy, wherein the density of the composite coating reaches more than 99.5%, and the hardness of the composite coating is not lower than 600HV;
induction remelting is carried out by utilizing an inner hole high-frequency induction remelting technology; the technical parameters of the induction remelting of the inner hole are as follows: the electromagnetic oscillation frequency is selected to be 400KHZ, the gap between the induction coil and the matrix is 5-20 mm, and the moving speed is 1-50 mm/s;
step four, performing atmosphere protection stress relief annealing on the remelted gun barrel, wherein the annealing temperature is 400 ℃;
and fifthly, machining the composite coating area, wherein the surface smoothness of the coating is not lower than Ra0.8.
2. The method of preparing a titanium alloy artillery barrel anti-ablation coating according to claim 1, wherein the method comprises the following steps: and step one, thoroughly cleaning the inner wall surface of the gun barrel by adopting an alkaline cleaning agent to remove oil and impurities.
3. The method for preparing the anti-ablation coating for the titanium alloy artillery barrel according to claim 1, wherein the method comprises the following steps: in the fourth step, the protective atmosphere is argon, the flow of the argon is 5-30 sccm, and the annealing time is 1-24 h.
4. The method of preparing a titanium alloy artillery barrel anti-ablation coating according to claim 1, wherein the method comprises the following steps: and fifthly, machining the composite coating area by a deep hole grinding method.
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| CN202010892017.8A CN111893417B (en) | 2020-08-28 | 2020-08-28 | Preparation method of anti-ablation coating of titanium alloy gun barrel |
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| CN202010892017.8A CN111893417B (en) | 2020-08-28 | 2020-08-28 | Preparation method of anti-ablation coating of titanium alloy gun barrel |
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| CN111893417B true CN111893417B (en) | 2022-11-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20080093047A1 (en) * | 2006-10-18 | 2008-04-24 | Inframat Corporation | Casting molds coated for surface enhancement and methods of making |
| CN101519704B (en) * | 2008-02-26 | 2010-10-13 | 宝山钢铁股份有限公司 | Method for laser cladding Co-based alloy coating at blast-furnace tuyere |
| CN102154609B (en) * | 2011-03-23 | 2013-01-16 | 北矿新材科技有限公司 | Preparation method of high-precision roller wear-resistant coating |
| DK2565290T3 (en) * | 2011-08-30 | 2018-11-12 | Rheinmetall Waffe Munition Gmbh | Ballistic protection system |
| CN104651771A (en) * | 2015-03-04 | 2015-05-27 | 中国科学院上海硅酸盐研究所 | High-temperature-resistant ablation-resistant tantalum carbide composite coating and preparation method thereof |
| CN109778103B (en) * | 2019-02-28 | 2021-04-13 | 航天材料及工艺研究所 | Refractory metal surface anti-ablation coating and preparation method thereof |
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