CN110643922A - Surface modification method of twin-wire arc spraying and laser remelting - Google Patents
Surface modification method of twin-wire arc spraying and laser remelting Download PDFInfo
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- CN110643922A CN110643922A CN201911016056.5A CN201911016056A CN110643922A CN 110643922 A CN110643922 A CN 110643922A CN 201911016056 A CN201911016056 A CN 201911016056A CN 110643922 A CN110643922 A CN 110643922A
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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
- C23C4/131—Wire arc 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
- C23C4/02—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
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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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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- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention relates to a surface modification method of twin-wire arc spraying and laser remelting. The coating prepared by the method has compact interior, no pore and crack defects, thereby greatly improving the surface hardness, the wear resistance and the corrosion resistance of the metal matrix, the hardness is improved by 6-10 times compared with that before treatment, the bonding strength is improved by 48.5%, the wear resistance is improved by 40-60%, the corrosion resistance can be improved by 40-50%, the surface modification treatment process has short flow, is easy to realize, safe, stable and reliable, the cladding layer is firm, is not easy to fall off, and can be used for enhancing the steel surfaces with various profiles.
Description
Technical Field
The invention relates to the technical field of surface coatings, in particular to a surface modification method of twin-wire arc spraying and laser remelting.
Background
At present, the application of the coating is more and more extensive in the industries of aviation, aerospace, national defense, automobiles, ships, chemical engineering, steel and the like. The coatings of different surface treatments can greatly improve the performances of wear resistance, heat resistance, corrosion resistance and the like of the base body parts. The laser remelting surface coating has better mechanical property and high-temperature property and longer service life, has attracted wide attention of various countries in recent years, and becomes one of important directions for the research of advanced coatings.
The NiAl coating is a well-used protective coating for high-temperature components, and has excellent performances of oxidation resistance, thermal shock resistance, wear resistance, atmospheric corrosion resistance and the like. The coating is mainly prepared by a thermal spraying method and is often used as a bonding bottom layer, so that the coating can protect a substrate and can increase the bonding strength of a working coating and the substrate. The surface of the substrate is more irregular than that of the substrate roughened by sand blasting, so that the working coating can form stronger mechanical embedding with the substrate. The NiAl base layer acts as a shield between the working coating and the substrate and minimizes oxidation or corrosion of the substrate due to the inherent porosity of the thermal spray coating. In addition, the expansion coefficient of the material is between that of the base material and that of the working coating, and the material has enough toughness under mechanical and thermal loads, and can buffer the stress generated by the difference between the base material and the working coating in the expansion coefficient.
Arc sprayed coatings have a typical layered structure, and the sprayed material is often in a non-equilibrium state, i.e., has non-uniformity, in chemical composition and crystal structure. In addition, in the process of forming a coating by sequentially accumulating deformed particles, defects such as cracks and the like are inevitably generated in the coating, the porosity of the electric arc spraying coating is high, the laminated structures are often separated by oxide substances, the main form of interface bonding is mechanical bonding, and the severe environment is difficult to adapt, so the application range and the service life of the electric arc spraying coating are limited.
The hot spraying/laser remelting technology is an advanced coating composite preparation technology combining laser heat treatment and the traditional coating technology, namely remelting treatment is carried out on the surface of a coating prepared by hot spraying by utilizing laser irradiation. Overall, however, the advantages of this technique mainly include three points: firstly, metallurgical bonding is generated between the substrate and the coating through the instantaneous high-temperature process of laser, so that the bonding capability between the substrate and the coating can be enhanced; secondly, the lamellar structure in the spraying coating can be eliminated, the porosity of the coating is reduced, the structure grains are refined, and the surface wear resistance of the coating is improved; and thirdly, for the coating with large difference of melting point and temperature between the coating material and the substrate material and with nano or ultra-fine grain size, the influence on the coating and the substrate, which cannot be avoided by the traditional heat treatment, can be overcome.
Aiming at the defects of the electric arc spraying coating, the electric arc spraying coating is subjected to laser remelting, most of pores and oxide impurities are eliminated by properly controlling remelting process parameters and adopting proper gas protection, so that the coating is compact, the corrosion resistance and other properties are improved, the bonding condition of the coating and metal is improved, the metallurgical bonding between the coating and a base material is realized, and the properties such as bonding strength and the like are greatly improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a surface modification method of twin-wire arc spraying and laser remelting, which takes NiAl95/05 alloy wires as a coating material, obtains a compact metallurgically bonded coating by utilizing a laser processing method, and has the characteristics of high hardness, high wear resistance and high corrosion resistance.
The invention is realized by the following technical scheme: a surface modification method of twin-wire arc spraying and laser remelting comprises the following steps:
(1) cleaning and sand blasting the surface of the metal matrix;
(2) the coating is prepared by a double-wire arc spraying method, and the technological parameters are as follows: the diameter of the wire is 1.6mm, the voltage is 30V, the current is 200A, the air pressure is 0.4MPa, the spraying distance is 150mm, the thickness of the coating is 200 mu m, and the moving speed of a spray gun is 100 mm/s;
(3) the surface of the coating is subjected to laser remelting treatment, and the process parameters are as follows: the laser power is 1.0 kW, the defocusing amount is 25mm, the scanning speed is 16mm/s, and the cooling air flow is 30L/min.
The invention has the advantages that:
(1) the laser remelting treatment on the surface of the coating can make lamellar structures in the sprayed coating disappear, a compact coating with good performance is obtained, and the quality of the coating is improved.
(2) Through laser remelting treatment, the stress caused by spraying is eliminated, the bonding strength between the coating and the metal matrix is improved, the coating has the defects of compactness, no pores and cracks, and firm cladding layer and is not easy to fall off, so that the phenomena of cracking and peeling caused by stress easily generated in the process of spraying and processing the coating with the common thickness are overcome, and the processability of the coating is improved.
(3) The hardness is improved by 6 to 10 times compared with that before treatment, the bonding strength is improved by 48.5 percent, the wear resistance is improved by 40 to 60 percent, the corrosion resistance can be improved by 40 to 50 percent,
(4) the coating has convenient surface treatment and relatively low cost, further exerts the advantage of taking the NiAl coating as a priming coat, and can carry out enhancement treatment on the steel surfaces with various profiles.
Drawings
FIG. 1 is a schematic representation of an arc sprayed coating and laser remelting of the coating of the present invention.
In the figure, 1-metal substrate, 2-spraying coating, 3-double-wire electric arc spraying gun, 4-spraying particle flow, 5-laser gun, 6-laser beam, 7-laser beam angle, 8, protective gas and 9-laser remelting coating.
Detailed Description
Example (b):
cleaning and sand blasting the surface of the metal matrix; the metal matrix is made of A3 steel with the size of 500mm multiplied by 20mm, and the metal matrix is cleaned and sand blasted: acetone cleaning, sand blasting pressure: 0.4-0.5MPa, 36 meshes of white corundum, and the space between 15 and 20 mm.
The coating is prepared by a twin-wire arc spraying method, as shown in figure 1, a metal wire generates an electric arc through a twin-wire arc spraying gun 3, and a spraying particle flow 4 is sprayed on the surface of a metal matrix 1 at a high speed by utilizing compressed air to form a spraying coating 2, wherein the process parameters are as follows: the diameter of the wire is 1.6mm, the voltage is 30V, the current is 200A, the air pressure is 0.4MPa, the spraying distance is 150mm, the thickness of the coating is 200 mu m, and the moving speed of a spray gun is 100 mm/s;
the surface of the coating is subjected to laser remelting treatment, a laser beam 6 generated by a laser passes through a laser gun 5, the angle of the laser beam 7 is adjustable (0-10 degrees), a laser remelting coating 9 is finally formed under the protection of a protective gas 8, the protective gas 8 is argon, and the process parameters are as follows: the laser power is 1.0 kW, the defocusing amount is 25mm, the scanning speed is 16mm/s, and the cooling air flow is 30L/min.
The performance tests of the coatings were carried out with reference to ASTM-C-633 and MIL-PRF-24667C-4.5 standards.
Claims (2)
1. A surface modification method of twin-wire arc spraying and laser remelting is characterized by comprising the following steps:
(1) cleaning and sand blasting the surface of the metal matrix;
(2) the coating is prepared by a double-wire arc spraying method, and the technological parameters are as follows: the diameter of the wire is 1.6mm, the voltage is 30V, the current is 200A, the air pressure is 0.4MPa, the spraying distance is 150mm, the thickness of the coating is 200 mu m, and the moving speed of a spray gun is 100 mm/s;
(3) the surface of the coating is subjected to laser remelting treatment, and the process parameters are as follows: the laser power is 1.0 kW, the defocusing amount is 25mm, the scanning speed is 16mm/s, and the cooling air flow is 30L/min.
2. The method for modifying the surface of claim 1, wherein the metal substrate is A3 steel, and the spray coating material is NiAl95/05 alloy wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016056.5A CN110643922A (en) | 2019-10-24 | 2019-10-24 | Surface modification method of twin-wire arc spraying and laser remelting |
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| CN201911016056.5A CN110643922A (en) | 2019-10-24 | 2019-10-24 | Surface modification method of twin-wire arc spraying and laser remelting |
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| CN110643922A true CN110643922A (en) | 2020-01-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151430A (en) * | 2020-03-10 | 2020-05-15 | 黑龙江雷博科技有限公司 | Preparation method of aesthetic coating on surface of tooth metal orthopedic wire |
| CN111962006A (en) * | 2020-08-14 | 2020-11-20 | 中国人民解放军陆军装甲兵学院 | Preparation and laser post-treatment strengthening process of high-energy micro-arc deposition layer on surface of copper alloy |
| CN114122579A (en) * | 2021-09-29 | 2022-03-01 | 乐凯胶片股份有限公司 | Thin aluminum plastic film and preparation method and application thereof |
| CN114657517A (en) * | 2022-02-15 | 2022-06-24 | 江苏大学 | Method for strengthening metal protective coating based on high repetition frequency ultrashort pulse laser |
| CN118272751A (en) * | 2024-05-29 | 2024-07-02 | 华南理工大学 | Laser-arc composite spray nozzle and spray method |
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| CN102277552A (en) * | 2010-06-09 | 2011-12-14 | 上海工程技术大学 | Metal surface treatment method employing arc-plasma spraying-laser remelting |
| CN104928617A (en) * | 2015-07-08 | 2015-09-23 | 常州大学 | Laser remelting method for steel electric arc spraying aluminum coating layer used for ocean platform |
| CN109440049A (en) * | 2017-11-27 | 2019-03-08 | 常州大学 | A kind of electric arc spraying and the compound method for preparing amorphous aluminized coating of laser remolten |
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2019
- 2019-10-24 CN CN201911016056.5A patent/CN110643922A/en active Pending
Patent Citations (3)
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| CN102277552A (en) * | 2010-06-09 | 2011-12-14 | 上海工程技术大学 | Metal surface treatment method employing arc-plasma spraying-laser remelting |
| CN104928617A (en) * | 2015-07-08 | 2015-09-23 | 常州大学 | Laser remelting method for steel electric arc spraying aluminum coating layer used for ocean platform |
| CN109440049A (en) * | 2017-11-27 | 2019-03-08 | 常州大学 | A kind of electric arc spraying and the compound method for preparing amorphous aluminized coating of laser remolten |
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| 王吉孝等: "激光重熔对电弧喷涂Ni-5Al涂层结合强度的影响", 《焊接》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151430A (en) * | 2020-03-10 | 2020-05-15 | 黑龙江雷博科技有限公司 | Preparation method of aesthetic coating on surface of tooth metal orthopedic wire |
| CN111962006A (en) * | 2020-08-14 | 2020-11-20 | 中国人民解放军陆军装甲兵学院 | Preparation and laser post-treatment strengthening process of high-energy micro-arc deposition layer on surface of copper alloy |
| CN111962006B (en) * | 2020-08-14 | 2023-02-28 | 中国人民解放军陆军装甲兵学院 | Preparation and laser post-treatment strengthening process of high-energy micro-arc deposition layer on surface of copper alloy |
| CN114122579A (en) * | 2021-09-29 | 2022-03-01 | 乐凯胶片股份有限公司 | Thin aluminum plastic film and preparation method and application thereof |
| CN114122579B (en) * | 2021-09-29 | 2024-05-24 | 乐凯胶片股份有限公司 | Thin aluminum plastic film and preparation method and application thereof |
| CN114657517A (en) * | 2022-02-15 | 2022-06-24 | 江苏大学 | Method for strengthening metal protective coating based on high repetition frequency ultrashort pulse laser |
| CN118272751A (en) * | 2024-05-29 | 2024-07-02 | 华南理工大学 | Laser-arc composite spray nozzle and spray method |
| CN118272751B (en) * | 2024-05-29 | 2024-10-18 | 华南理工大学 | Laser-arc composite spray nozzle and spray method |
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