CN214830665U - Cold spraying equipment for implementing process method for enhancing bonding strength of matrix and laser cold spraying coating by rectangular frame preheating track - Google Patents
Cold spraying equipment for implementing process method for enhancing bonding strength of matrix and laser cold spraying coating by rectangular frame preheating track Download PDFInfo
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- CN214830665U CN214830665U CN202120334850.0U CN202120334850U CN214830665U CN 214830665 U CN214830665 U CN 214830665U CN 202120334850 U CN202120334850 U CN 202120334850U CN 214830665 U CN214830665 U CN 214830665U
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Abstract
The utility model discloses a cold spraying equipment for implementing reinforcing base member and laser cold spraying coating bonding strength's rectangle frame preheats technological method of orbit, cold spraying equipment includes: a spray gun and a rectangular laser emitter; the spray gun is suspended right above a workpiece clamped on the machining lathe, and a nozzle of the spray gun is aligned with the workpiece to be machined; the rectangular laser transmitter is connected with the spray gun through a pneumatic guide rail, and the rectangular laser light spot and the spraying powder spot are overlapped; utilize the utility model discloses cold spraying equipment implements the technological method that strengthens base member and laser cold spray coating bonding strength's rectangle frame preheats the orbit, has improved the bad, the multi-hole crack scheduling problem in top of combination of cold spray coating, has improved the comprehensive properties of coating to contrast electroplating technique deposition rate has improved tens of times, and material utilization is high, and the preparation process is pollution-free to the environment.
Description
Technical Field
The utility model relates to a material surface treatment field especially relates to a cold spraying equipment that is used for implementing the technological method that the orbit was preheated to the rectangle frame that strengthens base member and laser cold spraying coating bonding strength.
Background
Along with the long-term service of a workpiece, the surface of the workpiece is seriously abraded, the failed parts are mainly treated by replacing old parts with new parts, so that resource waste is easily caused, the failed parts are repaired, particularly for large key parts which are inconvenient to disassemble and carry, the on-site repair is very meaningful, the failed parts are repaired to reduce the demand of new parts, the cost can be saved, and the economic effect is very high.
Cold spraying is a novel solid coating preparation method, high-speed particles are obtained by using supersonic airflow, and the matrix tissue is softened by irradiating laser on a matrix, so that the high-speed particles are deposited by solid plastic deformation to form a coating. The technology can be applied to the preparation of metal coatings, composite coatings and non-metal coatings.
Cold spraying is further classified into laser-assisted cold spraying and single cold spraying. The single cold spraying technology is one surface spraying process based on aerodynamic principle, and the principle is that high pressure gas produces supersonic flow through a convergent-divergent pipe to carry metal powder grains to impact the base body to produce plastic deformation for combining on the surface of the base body. In the process, the solid particles are accelerated to above 300 m/s. Compared with other thermal spraying technologies, the cold spraying technology has the greatest advantages that the process temperature is lower, the adverse reactions such as particle oxidation and decomposition can be greatly reduced, and the prepared coating keeps the original components, structure and performance of the material. The metal coating prepared by cold spraying is widely applied to aerospace, marine ships, rail transit, biomedical treatment, electromagnetic shielding and part repair. However, the limitation of single cold spraying is also obvious, the combination condition of the two materials is different due to the fact that the coating material and the base material are different, under the supersonic speed condition, high-speed particles impact the surface of the base body at high speed, part of the particles rebound and cannot be deposited on the surface of the base body, and therefore the cold spraying effect is poor, meanwhile, part of the deposited particles are not densely stacked on the surface of the base body, the distance between the particles is too large, and the coating performance is seriously affected.
The laser-assisted cold spraying technology heats the matrix synchronously by laser, softens the matrix, reduces the hardness of the matrix, enhances the bonding strength of the coating, and adds the laser-assisted process to enable the comprehensive advantages of the laser-assisted cold spraying technology to be greater than the simple superposition of the advantages of the processes alone, namely, the effect of 1+1 > 2 is achieved, so that the material processing process which cannot be realized by the traditional single process is realized, or the manufacturing process which has higher efficiency, better quality and better performance compared with the traditional single process is realized, the requirements of the modern advanced manufacturing technology with high efficiency, high quality and high performance are expected to be met, and the laser-assisted cold spraying technology has wide application prospect.
However, the traditional laser-assisted cold spraying process only acts on softening of a base material in the laser surface modification process, the performance of the coating is not further improved, the coating is uneven in thickness distribution in the cutting direction under high-speed impact of particles, the coating is broken and dispersed, the performance improvement is not obvious, and the wide application of the coating in the industry is limited.
Disclosure of Invention
The cold spraying equipment that is used for implementing the technological method that the orbit was preheated to the rectangle frame of reinforcing base member and laser cold spraying coating bonding strength, can soften base member and powder through rectangle laser facula irradiation effect, reduce critical speed, with laser and low pressure cold spraying synchronous coupling, improve the adhesive strength of base member and coating, remelt the coating simultaneously, improve its thickness maldistribution phenomenon and coating performance, thereby improve the material scope that can spray, improve the deposition efficiency of coating.
The technical scheme of the utility model as follows:
a cold spray apparatus for implementing a process for a rectangular frame pre-heat trace that enhances the bond strength of a substrate to a laser cold spray coating, the cold spray apparatus comprising: a spray gun and a rectangular laser emitter; the spray gun is suspended right above a workpiece clamped on the machining lathe, and a nozzle of the spray gun is aligned with the workpiece to be machined; the rectangular laser transmitter is connected with the spray gun through a pneumatic guide rail, and the rectangular laser light spot and the spraying powder spot are overlapped.
Further:
the spray nozzle of the spray gun is a Laval spray nozzle, the distance between the spray nozzle and the surface of the workpiece is 10-50 mm, and the sprayed powder spot is circular or rectangular according to the shape of the Laval spray nozzle;
the rectangular laser transmitter is a fiber laser or a semiconductor laser, and the shape of the emitted light spot is rectangular;
the spray gun and the rectangular laser emitter move synchronously, namely the positions of the spray powder spot and the rectangular laser spot are kept relatively fixed.
Utilize the utility model discloses implement the technological method that strengthens base member and laser cold spray coating bonding strength's rectangle frame preheats the orbit, the method includes following step:
(1) fixing the workpiece;
the workpiece can be a flat plate, a column, a cylinder or a disc; selecting a proper thimble or bracket to be matched with the chuck for clamping according to the shape, weight and size of the workpiece;
(2) adjusting a spray gun to enable a spray nozzle to spray powder spots on the surface of a workpiece, and introducing a laser, wherein the laser is connected with the spray gun through a pneumatic guide rail, so that rectangular light spots generated by the laser coincide with the sprayed powder spots;
specifically, when the distance between the nozzle and the surface of the workpiece is 30mm, the diameter of the sprayed powder spot is 6mm, the width of the rectangular light spot is slightly larger than the diameter of the sprayed powder spot, and the length of the rectangular light spot is 3-4 times of the diameter of the sprayed powder spot;
(3) according to the powder material spraying, carrier gas pressure, carrier gas flow, carrier gas preheating temperature and powder feeder rotating speed are set in a control panel of cold spraying equipment;
the spraying powder material is nonferrous metal, Fe base, Ni base, Co base or composite material thereof;
the carrier gas for spraying is air, nitrogen or/and helium, the pressure range of the carrier gas is 0.5-5 MPa, the flow rate of the carrier gas is 40-60 mL/min, the preheating temperature range is 600-1000 ℃, the powder feeding rotating speed range is 0.1-10 r/min, the particle size range of the powder is 15-53 mu m, and the powder is spherical or irregular;
(4) setting the power of a laser beam according to the material of a processed workpiece;
the workpiece is, for example, an aluminum plate or a copper plate;
the power of the laser beam is 500-1000W;
(5) setting the scanning linear velocity of a spray gun, carrying out laser composite cold spraying high-speed deposition processing on a workpiece, and synchronously moving a spraying powder spot and a rectangular laser spot in the processing process;
the scanning linear velocity can be set to be 8-12 mm/s;
(6) after the laser composite cold spraying high-speed deposition processing is finished, the workpiece is dismounted to finish the coating preparation;
the thickness of the obtained coating is 50-400 mu m.
In the process method, the laser composite cold spraying high-speed deposition processing is divided into the following three processes:
(a) the rectangular laser spots are used for cleaning, roughening and preheating the surface of a workpiece to be sprayed, the laser cleaning is used for eliminating the adverse effect of oil stains and an oxidation film on the surface of the workpiece on a deposited coating, the laser roughening is used for eliminating the effect of residues caused by sand blasting, and the rectangular laser spots play a role in preheating a base material while increasing the roughness so as to promote the combination of the coating and a matrix;
(b) the rectangular laser spot is overlapped with the spraying powder spot, and the deposited powder and the matrix are synchronously heated and softened, so that the critical deposition speed of the powder is reduced, the deposition efficiency of the powder is improved, and the binding force of a coating is improved;
(c) the rectangular laser spots remelt the top area of the deposited coating, eliminate the internal pores of the coating, reduce the roughness of the surface of the coating, and the middle lower part of the coating still keeps the structure and the performance of the original powder.
The reinforced matrix and the reinforcing rodA process method of a rectangular frame preheating track of bonding strength of a light cold spraying coating introduces a rectangular laser emitter in front of a cold spraying spray gun, and utilizes laser beams to process a workpiece, spraying powder and the coating, thereby reducing or even eliminating the defects of a cold spraying technology. The synergistic effect of laser processing and cold spraying is utilized to realize the rapid preparation of large-area coatings in a short time, and the deposition rate is more than 1m2And h, the use requirements of parts are met, and meanwhile, the working efficiency is greatly improved. The working principle is as follows:
during cold spraying, a rectangular laser is introduced, with a rectangular laser emitter located at the front of the spray gun. Rectangular laser is utilized to carry out cleaning, texturing and preheating on the surface of a workpiece to be sprayed, the laser cleaning eliminates the adverse effect of oil stains and an oxidation film on the surface of the workpiece on a deposited coating, the laser texturing effect is also free from the influence of residues caused by sand blasting, the roughness is increased, the function of preheating a base material is played, and the combination of the coating and a matrix is greatly promoted; the rectangular laser beam light spot and the spraying powder spot are basically superposed, and the laser power is set according to the melting point of the deposited material and the cold spraying preheating temperature, so that the laser beam only synchronously heats and softens the deposited powder and the matrix without melting, the critical deposition speed of the powder is reduced, the deposition efficiency of the powder is improved, and the binding force of the coating is improved; according to the thickness and the material property of the coating, the laser power is set, so that the rectangular laser beam remelting the top area of the deposited coating eliminates the internal pores of the coating, reduces the roughness of the surface of the coating, and the middle lower part of the coating still maintains the structure and the performance of the original powder. By utilizing the advantages of laser processing and the characteristic of high deposition rate of cold spraying, the rapid preparation of large-area coatings can be realized in a short time, and the working efficiency is greatly improved while the use requirements of parts are met.
Compared with the prior art, the beneficial effects of the utility model are mainly embodied in that:
1. the process method for enhancing the bonding strength of the matrix and the laser cold spraying coating by utilizing the cold spraying equipment of the utility model is a process method for preheating the track of the rectangular frame, which is a pollution-free environment-friendly surface treatment technology; the processing time is reduced by combining laser and cold spraying,the deposition rate is greatly improved while a coating with good quality is obtained, and the deposition rate is more than 1m2/h。
2. Utilize the utility model discloses the cold spraying equipment implements a reinforcing base member and the technological method of laser cold spraying coating bonding strength's rectangle frame preheating track, does not have the influence that traditional sand blasting handled and introduces impurity, and rectangle laser plays the effect of getting rid of workpiece surface greasy dirt and oxide film, texturing and preheating the substrate, very big promotion and improved the combination of deposition particle and base member.
3. Utilize the utility model discloses the technological method that the orbit was preheated to the rectangle frame of reinforcing base member and laser cold spray coating bonding strength that cold spray equipment implemented, the defect of cold spray coating top porous clearance is eliminated in the rectangle laser remelting, has reduced coating surface roughness, has reduced follow-up machining volume, has improved the utilization of material, has practiced thrift manufacturing cost.
Drawings
FIG. 1 is a schematic side view of the cold spray apparatus of the present invention;
FIG. 2 is a side view of a rectangular laser emitter and duster;
FIG. 3 is a schematic view of the front view of the cold spray apparatus of the present invention;
FIG. 4 is a partial view of the cold spray apparatus of the present invention;
FIG. 5 is a diagram showing the relative positions of rectangular light spots and powder spots;
FIG. 6 is an isometric view of the cold spray apparatus of the present invention;
FIG. 7 is a top view of the cold spray apparatus of the present invention;
FIG. 8 is a schematic view of the overall structure of the cold spray apparatus of the present invention;
in the figure, a motor is arranged in the 1-Z direction; 2-a vertical table; 3-a slide block; a 4-Z sliding shaft; 5-a slide rail; 6-a stop block; a 7-X direction substrate; 8-high pressure gas pipe 1; 9-high pressure gas pipe 2; 10-an optical fiber; 11-a pneumatic guide rail; 12-a rectangular laser emitter; 12-1-rectangular laser port; 13-a spray gun holder; 14-transverse fixing plate; 15-flange plate; 16-a workpiece; 17-a chuck; 18-a rotating electrical machine; moving the plate in the 19-Y direction; a 20-Y sliding shaft; a 21-Y direction screw; a 22-X directional sliding table; a 23-X direction sliding shaft; 24-a coupling; a 25-X direction motor; 26-Y direction motor; 27-Y direction sliding shaft; a 28-Y oriented substrate; 29-fixing bolts; 30-a substrate; 31-a limiting block; 32-powder chamber; 33-a coupling fixation body; 34-a stationary body; 35-a spray gun;
Detailed Description
The invention will be further described in the following by means of specific embodiments with reference to the attached drawings, but the scope of protection of the invention is not limited thereto.
Example 1
The copper is used as an example in this embodiment, and the method for carrying out the laser composite cold spraying high-speed deposition by using the cold spraying equipment of the utility model is explained, wherein the substrate material is Cu, and the size is 100mm multiplied by 50 mm.
The cold spraying equipment and a part of working views for implementing the process method of the rectangular frame preheating track for enhancing the bonding strength of the substrate and the laser cold spraying coating refer to fig. 1 and 4;
the cold spray apparatus includes: a spray gun 35, a rectangular laser emitter 12; the spray gun 35 is suspended right above the workpiece 16 clamped on the machining lathe, and the nozzle of the spray gun 35 is aligned with the workpiece 16 to be machined; the rectangular laser emitter 12 is connected with the spray gun 35 through the pneumatic guide rail 11, and enables the rectangular laser light spots and the spraying powder spots to coincide.
A process method for enhancing the bonding strength of a substrate and a laser cold spraying coating by a rectangular frame preheating track specifically comprises the following steps:
(1) loading the workpiece into a processing lathe, and clamping a chuck to ensure that the centers of circles are on the same horizontal line when the workpiece rotates;
(2) adjusting a spray gun, and spraying powder spots on the surface of the workpiece, wherein the diameter of the powder spots is 6 mm; adjusting the laser emitter to enable the powder spot to be located inside the rectangular light spot, enabling the laser light spot to be overlapped with the spraying powder spot, wherein the width of the rectangular laser light spot is 6.6mm, and the length of the rectangular laser light spot is 20 mm; the nozzle and the laser head move synchronously in the processing process;
(3) rectangular light spots emitted by a laser are divided into three areas under the action of the powder spots, the front area carries out laser cleaning, texturing and softening on the substrate within 8mm of the surface near a to-be-sprayed deposition layer, the middle area softens the powder spots, and the rear area remelts the coating;
(4) the spraying powder is 316L metal powder, the particle size of the powder is 15-53 mu m, and the spraying process comprises the following steps: the carrier gas is nitrogen, the gas pressure is 4MPa, the carrier gas flow is 50mL/min, the preheating temperature is 800 ℃, the powder feeding rotating speed is 2r/min, the spraying distance is 50mm, the lateral laser adopts an optical fiber coupling semiconductor laser, and the laser power is 1000W;
(5) after the powder spot and the light spot are sprayed together, the chuck can be rotated to the direction vertical to the chuck for spraying, and the feeding speed of the spray gun is 10 mm/s; carrying out laser composite cold spraying high-speed deposition;
finally obtaining a compact coating with the thickness of 226 mu m and good combination with the substrate, and the deposition rate is as high as 8.5m2/h。
Claims (4)
1. Cold spray apparatus for implementing a process for enhancing the bonding strength of a substrate to a laser cold spray coating by a rectangular frame pre-heating track, the cold spray apparatus comprising: a spray gun and a rectangular laser emitter; the spray gun is suspended right above a workpiece clamped on the machining lathe, and a nozzle of the spray gun is aligned with the workpiece to be machined; the rectangular laser transmitter is connected with the spray gun through a pneumatic guide rail, and the rectangular laser light spot and the spraying powder spot are overlapped.
2. The cold spray apparatus of claim 1, wherein the nozzle of the spray gun is a laval nozzle which is spaced from the surface of the workpiece by a distance of 10 to 50mm, and the sprayed powder spot is circular or rectangular according to the shape of the laval nozzle.
3. The cold spray apparatus of claim 1, wherein said rectangular laser emitter is a fiber laser or a semiconductor laser, and the emitted light spot has a rectangular shape.
4. The cold spray apparatus of claim 1, wherein the distance between the nozzle of the spray gun and the surface of the workpiece is 30mm, the sprayed powder spot is circular and has a diameter of 6mm, the width of the rectangular laser spot is slightly larger than the diameter of the sprayed powder spot, and the length of the rectangular laser spot is 3-4 times the diameter of the sprayed powder spot.
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| CN202120334850.0U CN214830665U (en) | 2021-02-05 | 2021-02-05 | Cold spraying equipment for implementing process method for enhancing bonding strength of matrix and laser cold spraying coating by rectangular frame preheating track |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981386A (en) * | 2021-02-05 | 2021-06-18 | 浙江工业大学 | Process method for enhancing bonding strength of matrix and laser cold spraying coating through rectangular frame preheating track and cold spraying equipment |
| CN115233208A (en) * | 2022-07-07 | 2022-10-25 | 国网宁夏电力有限公司超高压公司 | High-voltage isolating switch surface repairing method and device based on supersonic laser deposition |
| CN116752131A (en) * | 2023-08-22 | 2023-09-15 | 中国科学院宁波材料技术与工程研究所 | Cold spray additive manufacturing method and application |
-
2021
- 2021-02-05 CN CN202120334850.0U patent/CN214830665U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981386A (en) * | 2021-02-05 | 2021-06-18 | 浙江工业大学 | Process method for enhancing bonding strength of matrix and laser cold spraying coating through rectangular frame preheating track and cold spraying equipment |
| CN115233208A (en) * | 2022-07-07 | 2022-10-25 | 国网宁夏电力有限公司超高压公司 | High-voltage isolating switch surface repairing method and device based on supersonic laser deposition |
| CN115233208B (en) * | 2022-07-07 | 2023-10-03 | 国网宁夏电力有限公司超高压公司 | High-voltage isolating switch surface repairing method and device based on supersonic laser deposition |
| CN116752131A (en) * | 2023-08-22 | 2023-09-15 | 中国科学院宁波材料技术与工程研究所 | Cold spray additive manufacturing method and application |
| CN116752131B (en) * | 2023-08-22 | 2023-10-31 | 中国科学院宁波材料技术与工程研究所 | Cold spray additive manufacturing method and application |
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