CN111057984A - Hot spraying process for coating of turbine moving blade of gas turbine - Google Patents
Hot spraying process for coating of turbine moving blade of gas turbine Download PDFInfo
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- CN111057984A CN111057984A CN201911386032.9A CN201911386032A CN111057984A CN 111057984 A CN111057984 A CN 111057984A CN 201911386032 A CN201911386032 A CN 201911386032A CN 111057984 A CN111057984 A CN 111057984A
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- Prior art keywords
- blade
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- area
- spray gun
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- 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
- C23C4/129—Flame spraying
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a coating thermal spraying process for a movable blade of a turbine of a gas turbine, which comprises the steps of performing surface pretreatment on the movable blade to coarsen the surface, spraying, dividing the movable blade into a transition arc area, a transition area between an arc and a blade body, a platform area and a blade body area, keeping the movable blade still when spraying 3 areas of the arc area, the transition arc area and the platform area, rotating the movable blade when spraying the blade body area and finally performing coating treatment on the movable blade.
Description
Technical Field
The invention relates to the field of spraying of movable blade blades, in particular to a hot spraying process for a coating of a movable blade of a turbine of a gas turbine.
Background
Thermal spraying, which is a technique for heating and melting a coating material, atomizing the coating material into ultrafine particles by using high-speed airflow, spraying the ultrafine particles onto the surface of a workpiece at a high speed to form a coating, selecting different coating materials according to requirements, and obtaining one or more properties in the aspects of wear resistance, corrosion resistance, oxidation resistance, heat resistance and the like, wherein the thermal spraying is a surface strengthening technique, is an important component of a surface engineering technique and is a new technical project which is mainly popularized in China.
The surface of the turbine movable vane blade of the gas turbine is a complex curved surface, when the movable vane blade is sprayed by adopting the existing thermal spraying process, the spray gun is additionally held by the mechanical arm to carry out overall spraying, the spraying track of the spray gun needs to be programmed and debugged, wherein the difficulty degree of track debugging can also directly influence the production efficiency, the uniformity of the coating on the movable vane blade sprayed by adopting the spraying process is poor, and the microstructure performance of the coating between all parts of the movable vane blade is poor.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a hot spraying process for coating a turbine moving blade of a gas turbine, which improves the uniformity of hot spraying coatings of the moving blade, improves the coating structure of a key area, reduces the debugging difficulty of a hot spraying program and improves the production efficiency.
The technical scheme is as follows:
a hot spraying process for coating a movable blade of a turbine of a gas turbine comprises the following process steps:
a. surface pretreatment, namely, firstly carrying out thermal degreasing treatment on the blade, placing the blade in a heating device, heating to a certain temperature, then preserving heat, keeping the temperature for one hour, taking out the blade, cooling to 16-30 ℃, carrying out surface roughening treatment on the blade, placing the cooled blade in a sand blasting box, and carrying out sand blasting on an area to be sprayed to roughen the surface of the blade;
b. spraying: the moving blade is now divided into 4 spraying zones and the spraying is performed in the following order: a transition arc region, an arc and blade transition region, a platform region and a blade region; spraying by adopting a thermal spraying mode, before spraying, a spray gun on a spraying device is arranged on a mechanical arm on a robot, the spray gun is driven by the mechanical arm to move, the angle between the spray gun and the spraying position on the movable blade is adjusted to be 70-90 degrees, when 3 areas, namely an arc area, a blade body transition area, a transition arc area and a platform area, are sprayed, the movable blade is kept still, when spraying, the spray gun sprays powder on the spraying area and performs reciprocating offset motion, when spraying the blade body area, the movable blade needs to be fixed in a motor device, the movable blade rotates and rotates at the speed of 250-400n/min, the spray gun sprays the powder on the blade body area and performs reciprocating offset motion, after spraying, the blade is cooled to 16-30 ℃, and then the step c is performed;
c. coating treatment: carry out shot blasting to movable vane blade, adopt the peening machine to spray the part surface with high-speed shot stream, carry out the peening to the coating, make the coating tissue more compact, surface roughness reduces, perhaps carry out heat treatment, make coating and base member take place the diffusion, improve the bonding strength of coating and base member, wherein, the peening machine adopts ceramic shot peening, set up 4 nozzles in the peening machine, wherein 3 and transition circular arc region, circular arc and blade transition region, blade region become 90 contained angles, another shower nozzle becomes 45 contained angles with the platform region.
Further, the temperature of the heating device in the step a is controlled to be 330-; and (3) during coarsening: an included angle of 60-80 degrees is formed between a sand blasting gun in the sand blasting box and a sand blasting area of the blade, the sand blasting pressure is 5-8Bar, the sand blasting material is white corundum with the granularity of 40 meshes, and the coarsened surface roughness Ra of the blade subjected to sand blasting is larger than 4 mu m.
Further, the thermal spraying mode in the step b is plasma or supersonic spraying, wherein a spray gun in the supersonic spraying equipment carries out moving spraying through a mechanical arm, the model number of the spray gun in the spraying equipment is DJ-2700, and other parameters are set as follows: natural gas flow 202NLPM, oxygen flow 170NLPM, pulverized coal feed gas flow 12.5NLPM, ambient gas air flow 320 NLPM.
Further, the closer the angle between the spray gun and the spraying position on the movable blade in the step b is to 90 degrees, the optimal spraying effect is achieved.
And step c, performing coating treatment by adopting a heat treatment mode, placing the sprayed blade in a vacuum furnace, setting the temperature to 1120 ℃, preserving heat for 2 hours, adjusting the temperature to 845 ℃, preserving heat for 24 hours, and finally cooling to below 50 ℃ along with the furnace and taking out.
The hot spraying process for the coating of the movable blade of the turbine of the gas turbine, disclosed by the invention, has the beneficial effects that the process is adopted for spraying the movable blade, the movable blade is sprayed in different areas, the movable blade is rotated when being sprayed in a blade body area, the spraying is carried out, the uniformity of the hot spraying coating of the movable blade is improved, the coating structure of a key area is improved, a spray gun only carries out reciprocating offset motion, the debugging difficulty of a hot spraying program and the fault rate of a system are reduced, the maintenance is convenient, and the production efficiency is improved.
Detailed Description
The technical content of the invention is explained in detail with reference to the following specific examples:
a hot spraying process for coating a movable vane blade of a turbine of a gas turbine is used for spraying the movable vane blade of the 1 st stage of the turbine part of a GE MS6001B model gas turbine by using a supersonic spraying method, so that the thickness error of the coating can be controlled within 50 microns, and comprises the following process steps:
a. surface pretreatment, namely, firstly, carrying out thermal degreasing treatment on the blade, placing the blade in a heating device, heating the temperature of the heating device to 330-;
b. spraying: dividing the 1 st stage movable blade of the turbine part of a model GE MS6001B into 4 spraying areas, and spraying according to the following sequence: a transition arc region, an arc and blade transition region, a platform region and a blade region; spraying is carried out by adopting a thermal spraying mode, in the embodiment, spraying is carried out by adopting a supersonic spraying mode, an Oerlinkon Metco Multicoat spraying system is adopted, a DJ-2700 supersonic spraying gun is adopted as a spraying gun, Oerlinkon Metco Amdry 365-4 powder is adopted as powder, an ABB IRC Single robot is adopted as a robot, the spraying system of the spraying device is adjusted before spraying, and the parameters are set as follows: the natural gas flow 202NLPM, the oxygen flow 170NLPM, the powder feeding gas is the nitrogen flow 12.5NLPM, the surrounding gas air flow 320NLPM, a spray gun on the spraying equipment is arranged on a mechanical arm on the robot, the mechanical arm of the robot drives the spray gun to move, the angle between the spray gun and the spraying position on the movable blade is adjusted to be 70-90 degrees, the spraying effect is best when the spraying position is closer to 90 degrees, when 3 areas of the arc area, the blade body transition area, the transition arc area and the platform area are sprayed, the movable blade is kept still, when in spraying, the spray gun sprays powder on the spraying area, and performs reciprocating offset motion, when spraying aiming at the blade body area, the movable blade is required to be fixed in a motor device to rotate the movable blade, rotating at the speed of 250-;
c. coating treatment: carry out shot blasting to movable vane blade, adopt the peening machine to spray the part surface with high-speed shot stream, carry out the peening to the coating, make the coating tissue more compact, surface roughness reduces, perhaps carry out heat treatment, make coating and base member take place the diffusion, improve the bonding strength of coating and base member, wherein, the peening machine adopts ceramic shot peening, set up 4 nozzles in the peening machine, wherein 3 and transition circular arc region, circular arc and blade transition region, blade region become 90 contained angles, another shower nozzle becomes 45 contained angles with the platform region.
And c, placing the sprayed blade in a vacuum furnace in a heat treatment mode, setting the temperature to 1120 ℃ and preserving the heat for 2 hours, adjusting the temperature to 845 ℃ and preserving the heat for 24 hours, and finally cooling the blade to be lower than 50 ℃ along with the furnace and taking the blade out.
In conclusion, the process is adopted for spraying the movable blade, the movable blade is sprayed in different areas, when the movable blade is sprayed in the blade body area, the movable blade is rotated, spraying is carried out, the uniformity of the hot spraying coating of the movable blade is improved, the coating structure of a key area is improved, the spray gun only carries out reciprocating offset motion, the debugging difficulty of a hot spraying program and the fault rate of a system are reduced, maintenance is facilitated, and the production efficiency is improved.
The above description is the preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereto. It should be noted that modifications and equivalents may be made to the technical solution of the present invention by those skilled in the art without departing from the scope of the present invention.
Claims (5)
1. A hot spraying process for coating of a turbine moving blade of a gas turbine is characterized by comprising the following process steps:
a. surface pretreatment, namely, firstly carrying out thermal degreasing treatment on the blade, placing the blade in a heating device, heating to a certain temperature, then preserving heat, keeping the temperature for one hour, taking out the blade, cooling to 16-30 ℃, carrying out surface roughening treatment on the blade, placing the cooled blade in a sand blasting box, and carrying out sand blasting on an area to be sprayed to roughen the surface of the blade;
b. spraying: the moving blade is now divided into 4 spraying zones and the spraying is performed in the following order: a transition arc region, an arc and blade transition region, a platform region and a blade region; spraying by adopting a thermal spraying mode, before spraying, a spray gun on a spraying device is arranged on a mechanical arm on a robot, the spray gun is driven by the mechanical arm to move, the angle between the spray gun and the spraying position on the movable blade is adjusted to be 70-90 degrees, when 3 areas, namely an arc area, a blade body transition area, a transition arc area and a platform area, are sprayed, the movable blade is kept still, when spraying, the spray gun sprays powder on the spraying area and performs reciprocating offset motion, when spraying the blade body area, the movable blade needs to be fixed in a motor device, the movable blade rotates and rotates at the speed of 250-400n/min, the spray gun sprays the powder on the blade body area and performs reciprocating offset motion, after spraying, the blade is cooled to 16-30 ℃, and then the step c is performed;
c. coating treatment: carry out shot blasting to movable vane blade, adopt the peening machine to spray the part surface with high-speed shot stream, carry out the peening to the coating, make the coating tissue more compact, surface roughness reduces, perhaps carry out heat treatment, make coating and base member take place the diffusion, improve the bonding strength of coating and base member, wherein, the peening machine adopts ceramic shot peening, set up 4 nozzles in the peening machine, wherein 3 and transition circular arc region, circular arc and blade transition region, blade region become 90 contained angles, another shower nozzle becomes 45 contained angles with the platform region.
2. The thermal spraying process for the coating of the blade of the turbine movable blade of the gas turbine as claimed in claim 1, wherein the temperature of the heating device in the step a is controlled to be 370 ℃ below zero, the blade is heated to be 370 ℃ below zero in the heating device, and the blade is taken out and cooled after being kept warm for 1 hour; and (3) during coarsening: an included angle of 60-80 degrees is formed between a sand blasting gun in the sand blasting box and a sand blasting area of the blade, the sand blasting pressure is 5-8Bar, the sand blasting material is white corundum with the granularity of 40 meshes, and the coarsened surface roughness Ra of the blade subjected to sand blasting is larger than 4 mu m.
3. The thermal spraying process for the coating of the movable vane blade of the gas turbine as claimed in claim 1, wherein the thermal spraying manner in the step b is plasma or supersonic spraying, wherein a spray gun in the supersonic spraying equipment performs moving spraying through a mechanical arm, the model number of the spray gun in the spraying equipment is DJ-2700, and other parameters are set as follows: natural gas flow 202NLPM, oxygen flow 170NLPM, pulverized coal feed gas flow 12.5NLPM, ambient gas air flow 320 NLPM.
4. The thermal spraying process for the coating of the blade of the turbine movable blade of the gas turbine as claimed in claim 1, wherein the closer the angle between the spray gun and the spraying position on the movable blade in the step b is to 90 degrees, the better the spraying effect is.
5. The thermal spraying process for the coating of the movable blade and the blade of the turbine of the gas turbine as claimed in claim 1, wherein the coating treatment in step c can be carried out by a thermal treatment method, the sprayed blade is placed in a vacuum furnace, the temperature is set to 1120 ℃ and is kept for 2 hours, then the temperature is adjusted to 845 ℃ and is kept for 24 hours, and finally the blade is taken out after being cooled to the temperature lower than 50 ℃ along with the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911386032.9A CN111057984A (en) | 2019-12-27 | 2019-12-27 | Hot spraying process for coating of turbine moving blade of gas turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911386032.9A CN111057984A (en) | 2019-12-27 | 2019-12-27 | Hot spraying process for coating of turbine moving blade of gas turbine |
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| Publication Number | Publication Date |
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| CN111057984A true CN111057984A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911386032.9A Pending CN111057984A (en) | 2019-12-27 | 2019-12-27 | Hot spraying process for coating of turbine moving blade of gas turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112691864A (en) * | 2020-11-27 | 2021-04-23 | 成都飞机工业（集团）有限责任公司 | Method for improving thickness uniformity of automatic spraying coating |
| CN113324998A (en) * | 2021-05-13 | 2021-08-31 | 常州博康特材科技有限公司 | Production quality inspection supervision system for titanium alloy bars |
| CN114260156A (en) * | 2021-12-27 | 2022-04-01 | 江苏源清动力技术有限公司 | Curved surface spraying method for gas turbine blade |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4921405A (en) * | 1988-11-10 | 1990-05-01 | Allied-Signal Inc. | Dual structure turbine blade |
| EP0467821A1 (en) * | 1990-07-16 | 1992-01-22 | United Technologies Corporation | Method for applying abrasive layers to blade surfaces |
| CN101936190A (en) * | 2009-06-25 | 2011-01-05 | 株式会社日立制作所 | Turbine moving blade |
| CN103014704A (en) * | 2011-09-23 | 2013-04-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method of novel high-efficiency long-life thermal barrier coating |
| CN105132908A (en) * | 2015-10-16 | 2015-12-09 | 广东电网有限责任公司电力科学研究院 | Gas turbine blade thermal barrier coating bonding layer and preparation method thereof |
-
2019
- 2019-12-27 CN CN201911386032.9A patent/CN111057984A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4921405A (en) * | 1988-11-10 | 1990-05-01 | Allied-Signal Inc. | Dual structure turbine blade |
| EP0467821A1 (en) * | 1990-07-16 | 1992-01-22 | United Technologies Corporation | Method for applying abrasive layers to blade surfaces |
| CN101936190A (en) * | 2009-06-25 | 2011-01-05 | 株式会社日立制作所 | Turbine moving blade |
| CN103014704A (en) * | 2011-09-23 | 2013-04-03 | 沈阳黎明航空发动机(集团)有限责任公司 | Preparation method of novel high-efficiency long-life thermal barrier coating |
| CN105132908A (en) * | 2015-10-16 | 2015-12-09 | 广东电网有限责任公司电力科学研究院 | Gas turbine blade thermal barrier coating bonding layer and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112691864A (en) * | 2020-11-27 | 2021-04-23 | 成都飞机工业（集团）有限责任公司 | Method for improving thickness uniformity of automatic spraying coating |
| CN112691864B (en) * | 2020-11-27 | 2022-05-10 | 成都飞机工业（集团）有限责任公司 | Method for improving coating thickness uniformity of automatic spraying coating |
| CN113324998A (en) * | 2021-05-13 | 2021-08-31 | 常州博康特材科技有限公司 | Production quality inspection supervision system for titanium alloy bars |
| CN114260156A (en) * | 2021-12-27 | 2022-04-01 | 江苏源清动力技术有限公司 | Curved surface spraying method for gas turbine blade |
| CN114260156B (en) * | 2021-12-27 | 2023-09-22 | 江苏源清动力技术有限公司 | Curved surface spraying method for gas turbine blade |
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