CN113680631A - Fretting wear resistant coating for Z-shaped contact surface of turbine blade and process thereof - Google Patents
Fretting wear resistant coating for Z-shaped contact surface of turbine blade and process thereof Download PDFInfo
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- CN113680631A CN113680631A CN202110966083.XA CN202110966083A CN113680631A CN 113680631 A CN113680631 A CN 113680631A CN 202110966083 A CN202110966083 A CN 202110966083A CN 113680631 A CN113680631 A CN 113680631A
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- blade
- spraying
- turbine blade
- contact surface
- shaped contact
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- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- 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
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/08—Flame spraying
-
- 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
- B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
-
- 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
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/286—Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/288—Protective coatings for blades
Abstract
The invention discloses a fretting wear resistant coating of a Z-shaped contact surface of a turbine blade and a process thereof. The process comprises the following steps: the method comprises the following steps: trimming: carrying out appropriate finishing treatment on the surface to be sprayed of the blade by adopting finishing equipment; step two: cleaning operation is carried out to remove oil stains and dirt on the surface; step three: weighing the blade after the second inspection step before inspection and spraying, measuring the weight and thickness dimensions after the blade is qualified, and recording; step four: roughening the surface; step five: carrying out high-speed flame spraying coating operation of the coating; step six: visual inspection and dimensional inspection of the coating surface was performed. The invention solves the fretting wear problem caused by the vibration contact of the turbine blade in the high-temperature operation environment, avoids the material loss of the contact surface of the blade shroud, reduces the risk of blade fracture, prolongs the service life of the blade while reducing the defect growth rate, and provides guarantee for the safe and reliable operation of the turbine assembly of the gas turbine.
Description
Technical Field
The invention relates to a fretting wear resistant coating of a Z-shaped contact surface of a turbine blade and a process thereof, belonging to the technical field of nickel-based turbine blade wear resistant coatings of gas turbines.
Background
The turbine blade of the gas turbine is in a high-temperature, high-speed and vibration operation state for a long time, a row of blades with the blade caps are in contact with a Z-shaped contact surface for a long time, fretting wear and material defects caused by fretting wear are easy to generate, after the turbine blade runs for a long time in a severe environment, serious abrasion and even block dropping are easy to occur, even the blade is broken, and further serious fault loss of a unit can be caused.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a fretting wear resistant coating of a Z-shaped contact surface of a turbine blade and a process thereof, so as to solve the technical problems.
In order to achieve the purpose, the invention adopts the technical scheme that: a fretting wear resistant coating of a Z-shaped contact surface of a turbine blade comprises a turbine blade layer and a chromium carbide wear resistant coating positioned on one side of the turbine blade; the turbine blade layer is a nickel-based superalloy blade; the chromium carbide wear-resistant corrosion coating is coated on the surface of the Z-shaped contact surface of the turbine blade layer with the blade shroud structure.
A preparation process of fretting wear resistant coating of Z-shaped contact surface of a turbine blade comprises the following steps;
the method comprises the following steps: trimming, namely, performing appropriate trimming treatment on the surface to be sprayed of the blade by using trimming equipment to enable the surface state to have coating conditions;
step two: the surface of the glass is cleaned, and the glass is cleaned,
placing the blade to be sprayed in a customized ultrasonic cleaning tank, adding a proper amount of special cleaning agent, performing cleaning operation, and removing oil stains and dirt on the surface;
step three: checking, weighing before spraying,
inspecting the blade after the second step, measuring the weight and thickness dimensions after the blade is qualified, and recording;
step four: the surface is coarsened, and the grain size is increased,
adopting a special coarsening and shielding tool to effectively shield the non-spraying surface, setting a coarsening program and carrying out operation to ensure that the coarsened surface roughness is more than 3.2 mu m, removing the coarsening and shielding device after the detection is qualified, and carrying out proper liquid and gas cleaning on the surface to ensure that the spraying operation condition is met;
step five: high velocity flame spray application
Carrying out high-speed flame spraying and coating operation on the blade subjected to the step four within two hours, mounting the blade on a special rotary spraying tool, simultaneously mounting a spraying shielding tool, setting spraying parameters, compiling a spraying program, and carrying out spraying operation to enable the Z-shaped contact surface of the turbine blade to form a fretting wear resistant coating;
step six: post-spray treatment
And disassembling the spraying shielding tool after spraying, placing the blade on a detection workbench, carrying out necessary finishing after moderate cooling, carrying out visual inspection and dimension inspection on the surface of the coating, and confirming that no clear defects exist in the specification and the spraying range and thickness are within the specification requirements.
Furthermore, the surface state in the first step has coating conditions that the surface to be sprayed of the v-blade needs to be flat and smooth, and defects such as burrs, pits and the like cannot be caused.
Further, in the second step, the cleaning temperature of the blades is 80-100 ℃, and the cleaning time is 0.5-1 hour.
Further, in the third step, the requirement of blade inspection is; the blade surface can not have greasy dirt and foreign matters, the surface is perfect, and the blade has no scratch, crack defect and the like, the minimum unit of the weight record is 0.1g, and the minimum unit of the size record is 0.1 mm.
Further, the coarsening process requirement in the fourth step is as follows: the coarsening medium is alumina corundum, the mesh number of the medium is 30-60 meshes, the pressure is controlled at 2-6bar, the angle of the spray gun is 30-60 degrees, and the distance between the spray gun and the Z-shaped contact surface is 15-40 cm.
Further, the spraying process in the fifth step requires: the spraying material is chromium carbide powder, spraying parameters and programs need to be developed before spraying, bending and stretching tests are completed through trial spraying, and spraying operation is carried out after the test spraying is qualified.
Further, the post-spraying treatment and detection requirements in the sixth step are as follows: the coating has good molding, no obvious unfused particles, no burrs and no macroscopic defects, and the spraying thickness is 100-300 mu m.
The invention has the beneficial effects that: the invention solves the fretting wear problem caused by the vibration contact of the turbine blade in the high-temperature operation environment, avoids the material loss of the contact surface of the blade shroud, reduces the risk of blade fracture, prolongs the service life of the blade while reducing the defect growth rate, and provides guarantee for the safe and reliable operation of the turbine assembly of the gas turbine.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a turbine blade layer, 2, a chromium carbide wear-resistant coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
As shown in FIG. 1, the fretting wear resistant coating of the Z-shaped contact surface of the turbine blade comprises a turbine blade layer 1 and a chromium carbide abrasion resistant coating 2 positioned on one side of the turbine blade; the turbine blade layer 1 is a nickel-based superalloy blade; the chromium carbide wear-resistant corrosion coating 2 is coated on the surface of the Z-shaped contact surface of the turbine blade layer 1 with the blade shroud structure.
A preparation process of fretting wear resistant coating of Z-shaped contact surface of a turbine blade comprises the following steps;
the method comprises the following steps: trimming, namely, performing appropriate trimming treatment on the surface to be sprayed of the blade by using trimming equipment to enable the surface state to have coating conditions;
step two: the surface of the glass is cleaned, and the glass is cleaned,
placing the blade to be sprayed in a customized ultrasonic cleaning tank, adding a proper amount of special cleaning agent, performing cleaning operation, and removing oil stains and dirt on the surface;
step three: checking, weighing before spraying,
inspecting the blade after the second step, measuring the weight and thickness dimensions after the blade is qualified, and recording;
step four: the surface is coarsened, and the grain size is increased,
adopting a special coarsening and shielding tool to effectively shield the non-spraying surface, setting a coarsening program and carrying out operation to ensure that the coarsened surface roughness is more than 3.2 mu m, removing the coarsening and shielding device after the detection is qualified, and carrying out proper liquid and gas cleaning on the surface to ensure that the spraying operation condition is met;
step five: high velocity flame spray application
Carrying out high-speed flame spraying and coating operation on the blade subjected to the step four within two hours, mounting the blade on a special rotary spraying tool, simultaneously mounting a spraying shielding tool, setting spraying parameters, compiling a spraying program, and carrying out spraying operation to enable the Z-shaped contact surface of the turbine blade to form a fretting wear resistant coating;
step six: post-spray treatment
And disassembling the spraying shielding tool after spraying, placing the blade on a detection workbench, carrying out necessary finishing after moderate cooling, carrying out visual inspection and dimension inspection on the surface of the coating, and confirming that no clear defects exist in the specification and the spraying range and thickness are within the specification requirements.
Preferably, in the first step, the surface state of the coating in the first step is that the surface to be sprayed of the v-blade needs to be flat and smooth, and defects such as burrs and pits are avoided.
Preferably, in the second step of the present embodiment, the temperature for cleaning the leaves is 80-100 ℃ and the time for cleaning is 0.5-1 hour.
Preferably, in the third step of the present embodiment, the requirement for leaf inspection is; the blade surface can not have greasy dirt and foreign matters, the surface is perfect, and the blade has no scratch, crack defect and the like, the minimum unit of the weight record is 0.1g, and the minimum unit of the size record is 0.1 mm.
Preferably, in the fourth step, the requirement of the roughening process is as follows: the coarsening medium is alumina corundum, the mesh number of the medium is 30-60 meshes, the pressure is controlled at 2-6bar, the angle of the spray gun is 30-60 degrees, and the distance between the spray gun and the Z-shaped contact surface is 15-40 cm.
Preferably, in this embodiment, the requirements of the spraying process in the step five are as follows: the spraying material is chromium carbide powder, spraying parameters and programs need to be developed before spraying, bending and stretching tests are completed through trial spraying, and spraying operation is carried out after the test spraying is qualified.
Preferably, in the sixth step, the post-spraying treatment and detection requirements are as follows: the coating has good molding, no obvious unfused particles, no burrs and no macroscopic defects, and the spraying thickness is 100-300 mu m.
The invention solves the fretting wear problem caused by the vibration contact of the turbine blade in the high-temperature operation environment, avoids the material loss of the contact surface of the blade shroud, reduces the risk of blade fracture, prolongs the service life of the blade while reducing the defect growth rate, and provides guarantee for the safe and reliable operation of the turbine assembly of the gas turbine.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A fretting wear resistant coating of a Z-shaped contact surface of a turbine blade is characterized by comprising a turbine blade layer (1) and a chromium carbide wear resistant coating (2) positioned on one side of the turbine blade; the turbine blade layer (1) is a nickel-based high-temperature alloy blade; the chromium carbide wear-resistant corrosion coating (2) is coated on the surface of a Z-shaped contact surface of the turbine blade layer (1) with the blade shroud structure.
2. A preparation technology of fretting wear resistant coating of Z-shaped contact surface of a turbine blade is characterized by comprising the following steps;
the method comprises the following steps: trimming, namely, performing appropriate trimming treatment on the surface to be sprayed of the blade by using trimming equipment to enable the surface state to have coating conditions;
step two: the surface of the glass is cleaned, and the glass is cleaned,
placing the blade to be sprayed in a customized ultrasonic cleaning tank, adding a proper amount of special cleaning agent, performing cleaning operation, and removing oil stains and dirt on the surface;
step three: checking, weighing before spraying,
inspecting the blade after the second step, measuring the weight and thickness dimensions after the blade is qualified, and recording;
step four: the surface is coarsened, and the grain size is increased,
adopting a special coarsening and shielding tool to effectively shield the non-spraying surface, setting a coarsening program and carrying out operation to ensure that the coarsened surface roughness is more than 3.2 mu m, removing the coarsening and shielding device after the detection is qualified, and carrying out proper liquid and gas cleaning on the surface to ensure that the spraying operation condition is met;
step five: v high velocity flame spray application
Carrying out high-speed flame spraying and coating operation on the blade subjected to the step four within two hours, mounting the blade on a special rotary spraying tool, simultaneously mounting a spraying shielding tool, setting spraying parameters, compiling a spraying program, and carrying out spraying operation to enable the Z-shaped contact surface of the turbine blade to form a fretting wear resistant coating;
step six: post-spray treatment
And disassembling the spraying shielding tool after spraying, placing the blade on a detection workbench, carrying out necessary finishing after moderate cooling, carrying out visual inspection and dimension inspection on the surface of the coating, and confirming that no clear defects exist in the specification and the spraying range and thickness are within the specification requirements.
3. The process for preparing the fretting wear resistant coating on the Z-shaped contact surface of the turbine blade as claimed in claim 2, wherein the surface state in the first step is provided with coating conditions that the surface to be sprayed of the v-blade is required to be smooth and free from defects such as burrs and pits.
4. The process for preparing the fretting wear resistant coating of the Z-shaped contact surface of the turbine blade of claim 2, wherein in the second step, the cleaning temperature of the blade is 80-100 ℃ and the cleaning time is 0.5-1 hour.
5. The process for preparing an fretting wear resistant coating suitable for a Z-shaped contact surface of a turbine blade according to claim 2, wherein in the third step, the blade inspection requirement is; the blade surface can not have greasy dirt and foreign matters, the surface is perfect, and the blade has no scratch, crack defect and the like, the minimum unit of the weight record is 0.1g, and the minimum unit of the size record is 0.1 mm.
6. The process for preparing the fretting wear resistant coating of the Z-shaped contact surface of the turbine blade of claim 2, wherein the four-step roughening process requires: the coarsening medium is alumina corundum, the mesh number of the medium is 30-60 meshes, the pressure is controlled at 2-6bar, the angle of the spray gun is 30-60 degrees, and the distance between the spray gun and the Z-shaped contact surface is 15-40 cm.
7. The process for preparing the fretting wear resistant coating for the Z-shaped contact surface of the turbine blade of claim 2, wherein the spraying process requirement in the fifth step is as follows: the spraying material is chromium carbide powder, spraying parameters and programs need to be developed before spraying, bending and stretching tests are completed through trial spraying, and spraying operation is carried out after the test spraying is qualified.
8. The process for preparing the fretting wear resistant coating for the Z-shaped contact surface of the turbine blade according to claim 2, wherein the post-spraying treatment and detection requirements in the sixth step are as follows: the coating has good molding, no obvious unfused particles, no burrs and no macroscopic defects, and the spraying thickness is 100-300 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110966083.XA CN113680631A (en) | 2021-08-23 | 2021-08-23 | Fretting wear resistant coating for Z-shaped contact surface of turbine blade and process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110966083.XA CN113680631A (en) | 2021-08-23 | 2021-08-23 | Fretting wear resistant coating for Z-shaped contact surface of turbine blade and process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113680631A true CN113680631A (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110966083.XA Withdrawn CN113680631A (en) | 2021-08-23 | 2021-08-23 | Fretting wear resistant coating for Z-shaped contact surface of turbine blade and process thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717224A (en) * | 2011-07-18 | 2012-10-10 | 王茂才 | Method for conducting powder sintering and forming and restoring to large blade gap defects of gas turbine |
| CN106906437A (en) * | 2017-02-24 | 2017-06-30 | 中国船舶重工集团公司第七二五研究所 | A kind of turbine blade high corrosion resistant scale prevention coating and its preparation technology |
| CN107254650A (en) * | 2017-07-04 | 2017-10-17 | 安徽威龙再制造科技股份有限公司 | A kind of fan blade surface repairing method |
| CN112144003A (en) * | 2020-10-20 | 2020-12-29 | 华瑞（江苏）燃机服务有限公司 | Spraying process of gas turbine blade |
-
2021
- 2021-08-23 CN CN202110966083.XA patent/CN113680631A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717224A (en) * | 2011-07-18 | 2012-10-10 | 王茂才 | Method for conducting powder sintering and forming and restoring to large blade gap defects of gas turbine |
| CN106906437A (en) * | 2017-02-24 | 2017-06-30 | 中国船舶重工集团公司第七二五研究所 | A kind of turbine blade high corrosion resistant scale prevention coating and its preparation technology |
| CN107254650A (en) * | 2017-07-04 | 2017-10-17 | 安徽威龙再制造科技股份有限公司 | A kind of fan blade surface repairing method |
| CN112144003A (en) * | 2020-10-20 | 2020-12-29 | 华瑞（江苏）燃机服务有限公司 | Spraying process of gas turbine blade |
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Application publication date: 20211123 |