CN113445001A - Wear-resistant noise-reducing composite PVD coating process for engine valve - Google Patents
Wear-resistant noise-reducing composite PVD coating process for engine valve Download PDFInfo
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- CN113445001A CN113445001A CN202110748607.8A CN202110748607A CN113445001A CN 113445001 A CN113445001 A CN 113445001A CN 202110748607 A CN202110748607 A CN 202110748607A CN 113445001 A CN113445001 A CN 113445001A
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/021—Cleaning or etching treatments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0021—Reactive sputtering or evaporation
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/028—Physical treatment to alter the texture of the substrate surface, e.g. grinding, polishing
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0641—Nitrides
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/28—Vacuum evaporation by wave energy or particle radiation
- C23C14/30—Vacuum evaporation by wave energy or particle radiation by electron bombardment
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Physical Vapour Deposition (AREA)
Abstract
The invention discloses an engine valve wear-resistant noise-reducing composite PVD coating process, which comprises the steps of degreasing and cleaning an engine valve workpiece before coating treatment, repeatedly cleaning the engine valve workpiece by an ultrasonic cleaning machine, effectively ensuring the cleanliness of the surface of a workpiece substrate and ensuring a better film coating effect, finely cleaning and polishing the engine valve workpiece, plating the engine valve workpiece by a PVD vacuum pump to form a nitride film with a certain thickness on the surface of the engine valve workpiece, so that the wear resistance, the corrosion resistance and the chemical stability of the valve surface can be improved, the wear and the air leakage of the valve surface can be prevented, the good service life of the engine valve workpiece can be ensured, secondly, secondarily plating the engine valve workpiece to form a noise-reducing layer of water-based damping paint on the outer surface of the engine valve workpiece, so that the valve has a certain noise-reducing function, and simultaneously has the advantages of no toxicity, no pollution, and good film coating effect, The air valve has the characteristic of no peculiar smell, so that the air valve has good applicability.
Description
Technical Field
The invention belongs to the technical field of engine valve processing, and particularly relates to a wear-resistant noise-reducing composite PVD coating process for an engine valve.
Background
The principle of ion plating (PVD plating) is that under vacuum condition, low voltage and large current arc discharge technology is used, gas discharge is used to evaporate target material and ionize evaporated material, and the evaporated material or its reaction product is deposited on workpiece under the action of electric field.
The surface strength of the existing engine valve is low, the existing engine valve is easily abraded in the long-term use process, the problem of air leakage exists in the serious process, the influence on the engine is further caused, the noise reduction performance and the high temperature resistance of the valve are deficient in the daily use process, and the applicability of the valve is limited to a certain extent, so that the wear-resistant noise-reduction composite PVD coating process for the engine valve is provided for solving the problems.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the wear-resistant noise-reducing composite PVD coating process for the engine valve, which solves the problems that the surface strength of the existing engine valve is low, air leakage is easily caused by abrasion, and the noise reduction performance and the high temperature resistance performance of the existing engine valve are insufficient, so that the applicability of the existing engine valve is limited to a certain extent.
In order to solve the technical problems, the invention provides the following technical scheme: the wear-resistant noise-reducing composite PVD coating process for the engine valve comprises the following steps:
s1, oil removal: cleaning the workpiece with hot alkaline chemical deoiling liquid, steam heating to 60 deg.c for 20-30 min.
S2, grinding and polishing: polishing an engine valve workpiece, gradually polishing by using water abrasive paper for 2-3 times, and cleaning by using an ultrasonic cleaning machine after polishing.
S3, vacuumizing: and loading the cleaned and dried valve workpiece into a PVD vacuum furnace, then preheating the PVD vacuum furnace, and pumping away residual gas in the PVD vacuum furnace.
S4, heating and baking: the furnace body and the valve workpiece are heated simultaneously to accelerate the release of residual gas, and the electron beam temperature of the PVD vacuum furnace is heated to 300-400 ℃.
S5, pressure rise rate test: and testing the air leakage rate and the air release rate of the furnace body, and reducing the pressure of the vacuum furnace to P <0.0001 mbar.
S6, coating processing: after nitrogen is introduced into the PVD vacuum furnace as protective gas, the coating material evaporated from the surface of the target material and the reaction gas are used for coating the valve workpiece, and the flow range of the reaction gas nitrogen is 200-350 sccm.
S7, film coating and cooling: depositing a film layer and cooling the workpiece to reduce the temperature to below 150 ℃, wherein the cooling time is 2-3 h.
S8, secondary film coating: after PVD coating, the mixture is placed on the surface of a workpiece substrate through a noise reduction coating, and then laser cladding is carried out, wherein the thickness of the coating is about 10 mu m.
In a preferred embodiment of the present invention, in step S2, the surface roughness of the polished valve workpiece substrate is reduced to ra 2.5.
In a preferred embodiment of the present invention, in step S6, the bias voltage in the PVD vacuum furnace is controlled to be 200 to 280V, and the time is controlled to be 4 to 7 min.
In a preferred embodiment of the present invention, the thickness of the plating coating in step S6 is 0.3 μm to 5 μm, and the plating coating is a nitride film.
As a preferred technical solution of the present invention, in step S8, the noise reduction coating is composed of a functional emulsion, a damping pigment and filler, a flame retardant, and an auxiliary agent.
Compared with the prior art, the invention can achieve the following beneficial effects:
1. the engine valve workpiece is subjected to careful cleaning and polishing treatment, and the PVD vacuum pump is utilized to perform coating processing on the valve workpiece, so that a nitride film with a certain thickness is formed on the surface of the valve workpiece, the wear resistance, corrosion resistance and chemical stability of the surface of the valve can be improved, the valve workpiece is prevented from being worn and leaking air, the good service life of the valve workpiece is ensured, and then the valve workpiece is subjected to secondary coating, so that a noise reduction layer of water-based damping coating is formed on the outer surface of the valve workpiece, the valve has a certain noise reduction function, and meanwhile, the valve workpiece has the characteristics of no toxicity and no peculiar smell, and the valve has good applicability.
2. Before coating treatment is carried out on an engine valve workpiece, the engine valve workpiece is subjected to oil removal cleaning and then repeatedly cleaned by an ultrasonic cleaning machine, so that the cleanliness of the surface of a workpiece substrate can be effectively ensured, and the film coating effect is better.
Detailed Description
Technical means for implementing the present invention; authoring features; the purpose served by the disclosure is to provide a thorough understanding of the invention, and is to be construed as being a limitation on the scope of the invention as defined by the appended claims. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples, unless otherwise specified, are conventional methods, materials used in the following examples; reagents and the like are commercially available unless otherwise specified.
Examples
The wear-resistant noise-reducing composite PVD coating process for the engine valve comprises the following steps:
s1, oil removal: cleaning the workpiece with hot alkaline chemical deoiling liquid, steam heating to 60 deg.c for 20-30 min.
S2, grinding and polishing: polishing an engine valve workpiece, gradually polishing by using water abrasive paper for 2-3 times, and cleaning by using an ultrasonic cleaning machine after polishing.
S3, vacuumizing: and loading the cleaned and dried valve workpiece into a PVD vacuum furnace, then preheating the PVD vacuum furnace, and pumping away residual gas in the PVD vacuum furnace.
S4, heating and baking: the furnace body and the valve workpiece are heated simultaneously to accelerate the release of residual gas, and the electron beam temperature of the PVD vacuum furnace is heated to 300-400 ℃.
S5, pressure rise rate test: and testing the air leakage rate and the air release rate of the furnace body, and reducing the pressure of the vacuum furnace to P <0.0001 mbar.
S6, coating processing: after nitrogen is introduced into the PVD vacuum furnace as protective gas, the coating material evaporated from the surface of the target material and the reaction gas are used for coating the valve workpiece, and the flow range of the reaction gas nitrogen is 200-350 sccm.
S7, film coating and cooling: depositing a film layer and cooling the workpiece to reduce the temperature to below 150 ℃, wherein the cooling time is 2-3 h.
S8, secondary film coating: after PVD coating, the mixture is placed on the surface of a workpiece substrate through a noise reduction coating, and then laser cladding is carried out, wherein the thickness of the coating is about 10 mu m.
In other embodiments, in step S2, the surface roughness of the polished valve work piece substrate is reduced to ra 2.5;
through the design, the outer surface of the engine valve workpiece substrate can be finely polished, so that better conditions are provided for subsequent coating processing.
In other embodiments, in step S6, the bias voltage in the PVD vacuum furnace is controlled to be 200-280V, and the time is controlled to be 4-7 min;
through the design, the PVD vacuum pump can be used for carrying out good coating processing on the valve workpiece, so that a nitride film with a certain thickness is formed on the surface of the valve workpiece, the wear resistance, the corrosion resistance and the chemical stability of the surface of the valve can be improved, and the valve workpiece can be prevented from being worn and leaking air.
In other embodiments, the thickness of the coating layer in step S6 is 0.3 μm to 5 μm, and the coating layer is a nitride film;
through the design, the outer wall of the engine valve after being coated with the film forms a nitride film with good thickness, so that the nitride film is convenient to use for a long time, prevents the nitride film from falling off after being used for a long time, and prevents the nitride film from being worn to a large extent.
In other embodiments, in step S8, the noise reduction coating is composed of a functional emulsion, a damping pigment and filler, a flame retardant, and an auxiliary agent;
through the design, the outer surface of the engine valve forms a noise reduction layer of the water-based damping coating, so that the valve has a certain noise reduction function, and meanwhile, the valve has the characteristics of no toxicity and no peculiar smell, and the effectiveness of the valve is further improved.
The foregoing shows and describes the general principles of the present invention; the main features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The wear-resistant noise-reducing composite PVD coating process for the engine valve is characterized in that: the method comprises the following steps:
s1, oil removal: cleaning the workpiece with hot alkaline chemical degreasing liquid as cleaning solution, and cleaning at 60 deg.C for 20min-30 mm by steam heating;
s2, grinding and polishing: polishing an engine valve workpiece, gradually polishing by using water abrasive paper for 2-3 times, and cleaning the engine valve workpiece by using an ultrasonic cleaning machine after polishing;
s3, vacuumizing: loading the cleaned and dried valve workpiece into a PVD vacuum furnace, then preheating the PVD vacuum furnace and pumping out residual gas in the PVD vacuum furnace;
s4, heating and baking: the furnace body and the valve workpiece are heated simultaneously to accelerate the release of residual gas, and the electron beam temperature of the PVD vacuum furnace is heated to 300-400 ℃;
s5, pressure rise rate test: testing the air leakage rate and the air release rate of the furnace body, and reducing the pressure of the vacuum furnace to P <0.0001 mbar;
s6, coating processing: after nitrogen is introduced into a PVD vacuum furnace as protective gas, plating is carried out on the valve workpiece by the cooperation of coating material evaporated from the surface of the target and reaction gas, wherein the flow range of the reaction gas nitrogen is 200-350 sccm;
s7, film coating and cooling: depositing a film layer and cooling the workpiece to reduce the temperature of the workpiece to below 150 ℃, wherein the cooling time is 2-3 h;
s8, secondary film coating: after PVD coating, the mixture is placed on the surface of a workpiece substrate through a noise reduction coating, and then laser cladding is carried out, wherein the thickness of the coating is about 10 mu m.
2. The wear-resistant noise-reducing composite PVD coating process for the engine valve as claimed in claim 1, characterized in that: in step S2, the surface roughness of the polished valve workpiece substrate is reduced to ra 2.5.
3. The wear-resistant noise-reducing composite PVD coating process for the engine valve as claimed in claim 1, characterized in that: in the step S6, the bias voltage in the PVD vacuum furnace is controlled to be 200-280V, and the time is controlled to be 4-7 min.
4. The wear-resistant noise-reducing composite PVD coating process for the engine valve as claimed in claim 1, characterized in that: the thickness of the coating in the step S6 is 0.3-5 μm, and the coating is a nitride film.
5. The wear-resistant noise-reducing composite PVD coating process for the engine valve as claimed in claim 1, characterized in that: in the step S8, the noise reduction coating is composed of functional emulsion, damping pigment and filler, flame retardant and auxiliary agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110748607.8A CN113445001A (en) | 2021-07-02 | 2021-07-02 | Wear-resistant noise-reducing composite PVD coating process for engine valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110748607.8A CN113445001A (en) | 2021-07-02 | 2021-07-02 | Wear-resistant noise-reducing composite PVD coating process for engine valve |
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| CN113445001A true CN113445001A (en) | 2021-09-28 |
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| CN202110748607.8A Pending CN113445001A (en) | 2021-07-02 | 2021-07-02 | Wear-resistant noise-reducing composite PVD coating process for engine valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115466923A (en) * | 2022-09-21 | 2022-12-13 | 深圳市和胜金属技术有限公司 | PVD (physical vapor deposition) film coating method |
| CN115572974A (en) * | 2022-10-17 | 2023-01-06 | 中国船舶集团有限公司第七一一研究所 | Composite coating and preparation method thereof |
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| CN211946883U (en) * | 2020-04-02 | 2020-11-17 | 常州广树化工科技有限公司 | Noise-reducing coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115466923A (en) * | 2022-09-21 | 2022-12-13 | 深圳市和胜金属技术有限公司 | PVD (physical vapor deposition) film coating method |
| CN115572974A (en) * | 2022-10-17 | 2023-01-06 | 中国船舶集团有限公司第七一一研究所 | Composite coating and preparation method thereof |
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