CN107937904B - Method and device for preparing aluminum coating by laser cold spraying - Google Patents
Method and device for preparing aluminum coating by laser cold spraying Download PDFInfo
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- CN107937904B CN107937904B CN201711201894.0A CN201711201894A CN107937904B CN 107937904 B CN107937904 B CN 107937904B CN 201711201894 A CN201711201894 A CN 201711201894A CN 107937904 B CN107937904 B CN 107937904B
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- temperature
- laser
- powder
- spraying
- aluminum
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000011248 coating agent Substances 0.000 title claims abstract description 12
- 238000010288 cold spraying Methods 0.000 title claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 37
- 239000000843 powder Substances 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims abstract description 27
- 238000005507 spraying Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 239000010953 base metal Substances 0.000 claims abstract description 3
- 239000011247 coating layer Substances 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
- Nozzles (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
The invention relates to the technical field of cold spraying for preparing coatings. In particular to a method and a device for preparing an aluminum coating by laser cold spraying. The high-speed gas accelerates the metal powder to enter the powder conveying pipeline, the laser beam is emitted by the laser system to enter the powder conveying pipeline through the optical fiber pipe, the laser spot size is adjusted to be consistent with the diameter of the output powder beam, namely the diameter of a spray gun mouth, and the laser beam heats the aluminum powder particles to quickly reach the critical temperature of spraying. The monitoring of the powder temperature is monitored by a temperature detection control system and fed back to a laser system, and the laser system automatically adjusts the power according to the temperature fed back by the temperature monitoring system and by combining the critical temperature value of the powder particles and the absorption efficiency of the laser, so that the temperature of the sprayed aluminum particles is maintained at the critical temperature of 400 ℃ for spraying. The aluminum powder particles having reached the critical temperature are accelerated again by the gas accelerator and are collided with the surface of the base metal S355 steel through the spray gun and the supersonic nozzle to form a coating layer.
Description
Technical Field
The invention relates to the technical field of preparing coatings by cold spraying, which is a novel preparation method of an aluminum coating, and the technology comprises the steps of heating particles to a critical temperature, accelerating metal particles to supersonic speed by high-speed gas, and forming mechanical embedded combination with a matrix by plastic deformation generated in the process of impacting the matrix.
Background
The heating system adopted by cold spraying equipment is mostly an air heater, the traditional air heater heats air flow from an initial temperature to a required air temperature through a heating resistance wire, but the main defects of low heating efficiency, long heating time and uneven heating are the main defects of the traditional air heater. According to the invention, the laser is adopted to preheat the powder, so that the efficiency of heating the powder can be effectively improved, the energy loss is reduced, the high-speed cold spraying powder can quickly reach the critical temperature, and the substrate is impacted to form the coating.
Disclosure of Invention
As shown in fig. 1, the cold spray system apparatus according to the present invention includes: the device comprises a laser output system, a temperature detection control system, a powder feeder, a gas accelerator, a spray gun, a supersonic speed spray pipe and a splash particle recovery device. The powder feeder is connected with the spray gun through a powder conveying pipeline, the laser output system is connected into the powder conveying pipeline through an optical fiber pipe, the gas accelerator is connected into the powder conveying pipeline through a pipeline, the supersonic speed spray pipe is located in front of the spray gun and located in a closed spraying chamber of the splashing particle recovery device, and an exhaust fan is arranged at the tail of the splashing particle recovery device. The temperature detection control system is used for monitoring the temperature of the aluminum powder particles heated by the laser beam emitted by the laser output system and feeding back the temperature to the laser output system.
The high-speed gas accelerates aluminum powder particles to enter the powder conveying pipeline, the laser beam is emitted by the laser system to enter the powder conveying pipeline through the optical fiber pipe, the powder conveying pipeline is a high-temperature-resistant stainless steel pipe to meet the conveying condition of the high-temperature aluminum powder particles, the laser spot size is adjusted to be consistent with the diameter of an output powder beam, namely the diameter of a spray gun opening, and the laser beam heats the aluminum powder particles to quickly reach the critical temperature of spraying. The monitoring of the powder temperature is monitored by a temperature detection control system and fed back to a laser system, and the laser system automatically adjusts the power according to the temperature fed back by the temperature monitoring system and by combining the critical temperature value of the powder particles and the absorption efficiency of the laser, so that the temperature of the sprayed aluminum particles is maintained at the critical temperature of 400 ℃ for spraying. The laser power range is set to be 400-800W, and the heating temperature can be adjusted in the spraying process. The aluminum powder particles having reached the critical temperature are accelerated again by the gas accelerator and are collided with the surface of the base metal S355 steel through the spray gun and the supersonic nozzle to form a coating layer. The spraying is carried out in a closed spraying chamber, and particles which are not impacted on the surface of the matrix and fall off in the spraying process are recovered by a splashing particle recovery device. After spraying, the dust particles in the closed spraying chamber are discharged by an exhaust fan.
The invention is mainly characterized in that:
(1) in cold spray equipment, the application range of cold spray technology can be expanded by adopting laser as a heating source, and the cold spray equipment can be applied to spraying of ceramic coatings.
(2) The heating temperature of the powder particles can be accurately controlled and adjusted by adopting a laser and temperature monitoring system.
(3) The laser is used as a heating source, so that the heating speed can be increased, and the powder particles can be heated more uniformly.
Drawings
Fig. 1 laser cold spray system.
1. A laser output system; 2. a powder feeder; 3. a gas accelerator; 4. a temperature detection control system; 5. a spray gun; 6. a supersonic nozzle; 7. coating; 8. a substrate; 9. a spatter particle recovery device; 10. sealing the spraying chamber; 11. an exhaust fan.
FIG. 2 surface and interface topography of laser cold spray aluminum coatings.
Detailed Description
(1) Polishing the surface of the S355 steel of the base material by using 180# -1000# abrasive paper, cleaning by using absolute ethyl alcohol, and degreasing by using acetone to remove grease and impurities on the surface of the sample and ensure that the surface cleanliness of the base material reaches Sa3 level;
(2) using cast iron sand with the grain diameter of 1mm as abrasive grains, wherein the compressed air pressure is more than 0.8MPa, the sand blasting distance is 200mm, and the sand blasting angle is 20 degrees, so that the roughness reaches Rz 60 mu m;
(3) as shown in FIG. 1, the high-speed gas transports pure aluminum powder particles in the powder feeder to the spraying pipeline, and the aluminum powder is WFT1532 type pure aluminum powder with the diameter of 20-45 μm. The internal parameters of the powder feeder are as follows: the pressure is 3.5MPa, and the delivery amount is 1L/min. The gun speed of the spray gun is set to be 200mm/s, and the distance between the spray gun and the sample is 40 mm.
(4) And setting laser parameters according to the thickness requirement of the sprayed aluminum coating, wherein the diameter of a light spot is 3.5mm, namely the diameter is consistent with the diameter of a spray gun opening. And setting the laser power to be 500W by referring to the laser absorption rate of the aluminum powder and the critical temperature of the aluminum powder, controlling the temperature of the aluminum powder to be 400 ℃, and adjusting the laser power according to the feedback of the temperature detector in the spraying process.
(5) The laser-heated aluminum particles are impacted on the surface of the substrate S355 steel through a spray gun to form a dense aluminum coating, the aluminum powder particles are not melted, and the porosity of the formed aluminum coating is low, as shown in FIG. 2 (a). The aluminum coating thickness was 250 μm, and the bonding property with the substrate was good without voids, as shown in FIG. 2 (b).
Claims (5)
1. A method for preparing an aluminum coating by cold spraying with a device for preparing an aluminum coating by laser cold spraying, the device comprising: the device comprises a laser output system, a temperature detection control system, a powder feeder, a gas accelerator, a spray gun, a supersonic speed spray pipe and a splash particle recovery device; the powder feeder is connected with the spray gun through a powder conveying pipeline, the laser output system is connected into the powder conveying pipeline through an optical fiber pipe, the gas accelerator is connected into the powder conveying pipeline through a pipeline, the supersonic speed spray pipe is positioned in front of the spray gun and in a closed spray coating chamber of the splashing particle recovery device, and an exhaust fan is arranged at the tail part of the splashing particle recovery device; the temperature detection control system is used for monitoring the temperature of the aluminum powder particles heated by the laser beam emitted by the laser output system and feeding the temperature back to the laser output system, and is characterized in that high-speed gas accelerates the aluminum powder particles to enter a powder conveying pipeline, the laser beam is emitted by the laser output system and enters the powder conveying pipeline through an optical fiber pipe, and the aluminum powder particles are heated by the laser beam to quickly reach the critical temperature of spraying; the aluminum powder particles having reached the critical temperature are accelerated again by the gas accelerator and are collided with the surface of the base metal S355 steel through the spray gun and the supersonic nozzle to form a coating layer.
2. The method of claim 1, wherein the powder delivery duct is a high temperature stainless steel pipe to satisfy delivery conditions of the high temperature aluminum powder particles.
3. The method of claim 1 wherein the laser spot size is adjusted to correspond to the diameter of the output powder beam, i.e., the diameter of the spray gun nozzle.
4. The method of claim 1, wherein the monitoring of the powder temperature is monitored by a temperature detection control system and fed back to a laser output system, the laser output system automatically adjusts the power according to the temperature fed back by the temperature detection control system and by combining the critical temperature value of the powder particles and the absorption efficiency of the laser, so that the temperature of the sprayed aluminum particles is maintained at the critical temperature of 400 ℃ for spraying, and the laser power range is set at 400 ~ 800W, so that the heating temperature can be adjusted during the spraying process.
5. The method according to claim 1, wherein the spraying is performed in a closed spraying chamber, particles falling off without hitting the surface of the substrate during the spraying are recovered by a spatter particle recovery means, and dust particles in the closed spraying chamber are discharged by a discharge fan after the spraying is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711201894.0A CN107937904B (en) | 2017-11-27 | 2017-11-27 | Method and device for preparing aluminum coating by laser cold spraying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711201894.0A CN107937904B (en) | 2017-11-27 | 2017-11-27 | Method and device for preparing aluminum coating by laser cold spraying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107937904A CN107937904A (en) | 2018-04-20 |
| CN107937904B true CN107937904B (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711201894.0A Active CN107937904B (en) | 2017-11-27 | 2017-11-27 | Method and device for preparing aluminum coating by laser cold spraying |
Country Status (1)
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| CN (1) | CN107937904B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110872712A (en) * | 2019-11-11 | 2020-03-10 | 北京科技大学 | Preparation and test method of zinc-aluminum corrosion-resistant coating on inner wall of SA106B pipe |
| CN111005018B (en) * | 2019-12-27 | 2021-12-24 | 深圳市欣天科技股份有限公司 | Preparation method for spraying metal powder to form metal coating on surface of ceramic substrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037771A (en) * | 2007-02-09 | 2007-09-19 | 上海工程技术大学 | Method for preparing TiC-TiB2 nano-micrometre multiple phase ceramic coating |
| WO2011053368A1 (en) * | 2009-10-27 | 2011-05-05 | Siemens Aktiengesellschaft | Method for simulating of the thickness of a coating |
| CN102712007A (en) * | 2009-12-04 | 2012-10-03 | 密执安州立大学董事会 | Coaxial laser assisted cold spray nozzle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920626B (en) * | 2014-03-19 | 2016-08-24 | 浙江工业大学 | A kind of laser assisted cold spray-coating method and spray nozzle device |
| CN106399897A (en) * | 2016-09-22 | 2017-02-15 | 常州大学 | Method and device for preparing amorphous aluminum coating by means of laser thermal spraying |
-
2017
- 2017-11-27 CN CN201711201894.0A patent/CN107937904B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101037771A (en) * | 2007-02-09 | 2007-09-19 | 上海工程技术大学 | Method for preparing TiC-TiB2 nano-micrometre multiple phase ceramic coating |
| WO2011053368A1 (en) * | 2009-10-27 | 2011-05-05 | Siemens Aktiengesellschaft | Method for simulating of the thickness of a coating |
| CN102712007A (en) * | 2009-12-04 | 2012-10-03 | 密执安州立大学董事会 | Coaxial laser assisted cold spray nozzle |
Non-Patent Citations (1)
| Title |
|---|
| The Laser-assisted Cold Spray process and deposit characterisation;Matthew Bray等;《Surface and Coatings Technology》;20090316;第203卷(第19期);第2851页右栏第1段-第2853页右栏第3段，图1 * |
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| CN107937904A (en) | 2018-04-20 |
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Effective date of registration: 20240129 Address after: No. 6, West District, Gaofuzhuang Village, Xiaying Town, Jizhou District, Tianjin City, 301900 Patentee after: Gao Xueling Country or region after: China Address before: 101200 room 205-211526, No. 40, Fuqian West Street, Pinggu town, Pinggu District, Beijing (cluster registration) Patentee before: BEIJING YONGBO TECHNOLOGY CO.,LTD. Country or region before: China Effective date of registration: 20240129 Address after: 101200 room 205-211526, No. 40, Fuqian West Street, Pinggu town, Pinggu District, Beijing (cluster registration) Patentee after: BEIJING YONGBO TECHNOLOGY CO.,LTD. Country or region after: China Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: CHANGZHOU University Country or region before: China |
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Effective date of registration: 20240702 Address after: 100000 west side of building 7, building 15, Jia Jia garden, Fengtai District, Beijing. Patentee after: Beijing aoweigao metal products Technology Development Co.,Ltd. Country or region after: China Address before: No. 6, West District, Gaofuzhuang Village, Xiaying Town, Jizhou District, Tianjin City, 301900 Patentee before: Gao Xueling Country or region before: China |
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