WO2004013368A1 - 遮熱皮膜施工方法、マスキングピン及び燃焼器尾筒 - Google Patents
遮熱皮膜施工方法、マスキングピン及び燃焼器尾筒 Download PDFInfo
- Publication number
- WO2004013368A1 WO2004013368A1 PCT/JP2003/001078 JP0301078W WO2004013368A1 WO 2004013368 A1 WO2004013368 A1 WO 2004013368A1 JP 0301078 W JP0301078 W JP 0301078W WO 2004013368 A1 WO2004013368 A1 WO 2004013368A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thermal barrier
- barrier coating
- cooling hole
- masking
- thermal
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
-
- 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
- C23C4/01—Selective coating, e.g. pattern coating, without pre-treatment of the material to be coated
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49316—Impeller making
- Y10T29/49318—Repairing or disassembling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
Definitions
- the present invention relates to a method for applying a thermal barrier coating, a masking pin, and a transition piece of a combustor, and can apply a thermal barrier coating to an entire surface where heat shielding is required without closing a cooling hole. At the same time, it has been devised to facilitate the work of thermal barrier coating. Background art
- FIG. 3 shows a portion of the gas turbine where the combustor 100 is arranged.
- the combustor 100 is composed of a fuel nozzle 101, a combustor inner cylinder 102, and a combustor transition piece 103.
- Fuel F and compressed air PA discharged from the compressor 104 are supplied to the fuel nozzle 101, and a premixed gas obtained by mixing the fuel F and the compressed air PA is burned from the fuel nozzle 101.
- the premixed gas is ejected into the inner cylinder 102, and the premixed gas is burned to generate high-temperature / high-pressure combustion gas CG.
- the combustion gas CG is guided by the combustor transition piece 103 and the flow velocity and flow direction are controlled by the stationary blades 105, and then acts on the rotor blades 106 to rotate the rotor blades 106. .
- a part of the compressed air PA is supplied into the combustor transition piece 103 with the air amount adjusted through the bypass valve 107.
- 108 is a cabin.
- the combustor transition piece 103 is a cylinder that guides the combustion gas CG to the wings.
- the inlet side (the combustor inner cylinder 102 side) is circular, but the outlet side (the stationary vane 105 side). Is rectangular.
- an air cooling structure is adopted for the combustor transition piece 103.
- the air cooling structure used for the combustor transition piece 103 is shown by cutting out a part of the combustor transition piece 103, and is a cross-sectional view of FIG. 4 viewed from the direction A. 5, a description will be given with reference to FIG. 6, which is a cross-sectional view of FIG.
- the wall forming the combustor transition piece 103 is a double-walled structure in which the outer plate 2 with the air flow groove 1 and the inner plate 3 are joined. ing. Toes The outer peripheral wall surface of the combustor transition piece 103 becomes the outer plate 2, and the inner peripheral wall surface becomes the inner plate 3, and the combustion gas CG flows in the wall surface of the combustor transition piece 103. A plurality of extending air flow grooves 1 are formed. Further, an air suction hole 4 communicating with the air flow groove 1 is formed in the outer plate 2, and an air discharge hole 5 communicating with the air flow groove 1 is formed in the inner plate 3. The diameter of the holes 4 and 5 is larger than the width of the air flow groove 1. In addition, while the positions of the air suction holes 4 and the air discharge holes 5 are shifted, a large number of the air suction holes 4 and the air discharge holes 5 are formed in a staggered or grid pattern.
- the compressed air PA discharged from the compressor 1.04 becomes cooling air, and this cooling air enters the air flow groove 1 through the air suction hole 4 and passes through the air flow groove 1.
- the wall of the combustor transition piece 103 is cooled by air. This cooling air is discharged from the air discharge hole 5 and discharged into the internal space of the combustor transition piece 103.
- a large number (for example, about 600 to 800) of air discharge holes (cooling holes) 5 are formed on the inner peripheral surface of the combustor transition piece 103.
- the inner peripheral surface of the combustor transition piece 103 is coated with a thermal barrier coating (TBC).
- TBC thermal barrier film
- the procedure for applying a thermal barrier coating to the inner peripheral surface of the combustor transition piece 103 is as follows.
- a base metal layer (undercoat) is formed on the roughened inner surface of the transition piece by thermal spraying.
- a thermal barrier layer (top coat) is formed on the underlying metal layer by spraying a ceramic material containing zirconia as a main component.
- a masking tape 10 is applied to a band-shaped area where the cooling holes 5 are arranged, and the spraying is performed by spraying.
- a thermal barrier coating was formed.
- the masking tape 10 was peeled off. Therefore, remove the masking tape 10 as shown in FIG. No thermal barrier film is formed on the band-like area 11 of the trace.
- masking tape requires two types of attachment and removal, one for blasting and one for coating, which takes time.
- a masking pin MP1 is inserted into a cooling hole 5 formed in an inner peripheral surface (inner plate 3) of a combustor transition piece 103.
- a thermal barrier coating TBC was formed by thermal spraying.
- the masking pin MP 1 is made by stacking a large number of masking tapes (vinyl-based tapes) and punching it out with a cylindrical mold into a cylindrical shape. It protrudes from the side surface (the surface of the inner plate 3).
- the thermal barrier film is not formed on the wide band-shaped region 11. If the gas turbine is used for a long time, the area 11 of the combustor tail tube 103 where the thermal barrier coating is not formed will be reduced in oxidation and metal temperature due to the absence of the underlying metal layer (oxidation-resistant layer). Cracks were generated due to the rise, and damage was caused by crack growth.
- the present invention closes a cooling hole when forming a thermal barrier coating by thermal spraying on the surface of a member having a cooling hole formed on the surface (for example, the inner peripheral surface of a combustor transition piece). It is an object of the present invention to provide a thermal barrier coating method, a masking pin, and a combustor transition piece that can form a thermal barrier coating on the entire surface without performing the process.
- the configuration of the thermal barrier coating method of the present invention for solving the above-mentioned problems is a thermal barrier coating application method of forming a thermal barrier coating by thermal spraying on a surface of a member having a cooling hole formed on the surface thereof, After inserting a masking pin which does not protrude from the surface of the member into the cooling hole, a thermal barrier coating is formed by thermal spraying.
- the configuration of the thermal barrier coating method according to the present invention is a thermal barrier coating application method for forming a thermal barrier coating by thermal spraying on a surface of a member having a cooling hole formed on the surface, wherein the cooling hole is provided.
- the configuration of the thermal barrier coating method according to the present invention is a thermal barrier coating application method for forming a thermal barrier coating by thermal spraying on a surface of a member having a cooling hole formed on the surface, wherein the cooling hole is provided. Then, a masking pin projecting from the surface of the member substantially by the thickness of the thermal barrier coating is inserted, and then the thermal barrier coating is formed by thermal spraying. Further, the configuration of the thermal barrier coating method according to the present invention is a thermal barrier coating application method for forming a thermal barrier coating by thermal spraying on a surface of a member having a cooling hole formed on the surface, wherein the cooling hole is provided.
- the configuration of the thermal barrier coating method according to the present invention is a thermal barrier coating application method for forming a thermal barrier coating by thermal spraying on a surface of a member having a cooling hole formed on the surface, wherein the cooling hole is provided. Then, a masking pin projecting from the surface of the member is inserted, and then a thermal barrier coating is formed by thermal spraying, wherein the size of the projection after shrinking of the masking pin due to heat during thermal spraying is reduced. It is characterized in that it is less than the thickness of the thermal barrier coating.
- the configuration of the method for applying a thermal barrier coating of the present invention is a method for applying a thermal barrier coating, in which a thermal barrier coating is formed by thermal spraying on a surface of a member having a cooling hole formed on the surface thereof.
- the cooling hole is a hole that does not penetrate, or a hole that penetrates, and the member is a combustor transition piece of a gas turbine,
- the cooling hole is formed on an inner peripheral surface of a wall surface forming the combustor transition piece.
- the configuration of the method for applying a thermal barrier coating of the present invention includes the following: the masking pin has elasticity excellent in blast resistance, heat resistance to withstand heat by thermal spraying, and release from the cooling hole after the thermal barrier coating is formed.
- the masking pin is made of a silicon-based rubber elastic body, or is formed of a material having good wettability without depositing the heat-shielding film material.
- Masking pin is injected into the cooling hole
- the liquid silicone rubber elastic material that has entered is formed by drying and curing, or the masking pin is formed by punching a silicon rubber elastic material sheet with a mold or by molding with a mold. It is characterized by being.
- the masking pin of the present invention has excellent elasticity with excellent blast resistance, heat resistance to withstand the heat generated by thermal spraying, mold releasability in which the entirety can be taken out from the cooling hole after the formation of the thermal barrier coating, and excellent mounting properties.
- the thermal coating material is formed of a material having wettability without being deposited, or the masking pin is formed by drying and hardening the liquid silicon rubber elastic material injected into the cooling hole.
- the masking pin is characterized in that the masking pin is formed by punching a silicon rubber elastic sheet with a mold or by molding with a mold. Further, the outer diameter of the masking pin is approximately 10% larger than the diameter of the cooling hole.
- the combustor transition piece of the present invention is characterized in that a heat barrier coating is formed on the inner peripheral surface by the above-described method of applying a heat barrier coating.
- FIG. 1 is an explanatory view showing a method of applying a thermal barrier coating according to an embodiment of the present invention using a masking pin made of a liquid silicone rubber elastic body.
- FIG. 2 is an explanatory view showing a method of applying a thermal barrier coating according to an embodiment of the present invention using a masking pin formed by punching out a silicone rubber elastic body sheet using a mold or using a mold.
- FIG. 3 is a configuration diagram showing a portion of the gas turbine where a combustor is arranged.
- FIG. 4 is a cutaway perspective view showing a part of a wall surface forming a combustor transition piece.
- FIG. 5 is a cross-sectional view of FIG. 4 viewed from the direction A.
- FIG. 6 is a cross-sectional view of FIG. 4 viewed from the direction B.
- FIG. 7 is a plan view showing the inner peripheral surface of the combustor transition piece masked with a masking tape.
- FIG. 8 is a plan view showing the inner peripheral surface of the combustor transition piece with the masking tape removed.
- FIG. 9 is a cross-sectional view showing a conventional combustor transition piece in which a masking pin is inserted.
- FIG. 10 is a view showing the shape of a disk-shaped masking pin.
- FIG. 11 is a diagram showing the shape of a disc-shaped masking pin with legs.
- Figure 12 shows the shape of a masking pin that is a disk with legs and has projections around it.
- FIG. 13 is an explanatory view showing another example of the method of applying the thermal barrier coating according to the embodiment of the present invention, which uses a masking pin formed by punching out a silicon rubber elastic sheet with a mold or using a mold. is there.
- the liquid silicon rubber elastic body (silicon gasket) is a liquid silicon rubber elastic body of Model No. 1207F manufactured by Three Bond (the composition is mainly Si and O, and the heat resistance temperature is 2 50 ° C) Force S, Silicon rubber elastic sheet made of Silicon Rubber elastic sheet made by Three Bond (Si and 0 mainly, heat resistant temperature is 2 0 ° C) was found to be optimal.
- the adhesion to the base material may be too high and the releasability may be poor.
- the use of Si-based or fluorine-based release sprays is effective. is there.
- the liquid silicon rubber elastic body is not limited to the above-mentioned one made by Three Bond, but may be any of the above-mentioned (1) to (4) if its composition is mainly Si and O. Since the material has the following material characteristics, such a liquid silicon rubber elastic body can be selected as a material for the masking pin.
- the silicon rubber elastic sheet is not limited to the above-mentioned one made by Three Bond, but may be any of the above-mentioned (1) to (4) if the composition is mainly Si and O. Since it has material properties, such a silicon rubber elastic sheet can be selected as a material for the masking pin.
- the experiments conducted to select the masking material included a test piece having the same composition as the combustor transition piece, and an air-cooling structure formed in the combustor transition piece (air flow grooves, air suction holes, air discharge holes (cooling). Holes)) were formed, and various materials were introduced into the cooling holes for the experiment.
- the test piece with the material introduced into the cooling hole was heated to 200 ° C. in the atmosphere for 10 minutes, and then the material was taken out and the above properties (1) to (4) were judged.
- the test piece with the material introduced into the cooling hole is placed in an argon gas atmosphere for 1 minute! After heating to 400 ° C., the material was taken out and subjected to the above-mentioned properties (1) to (4).
- the base metal of the combustor transition piece always has a temperature of about 200 ° C and the temperature of the sprayed material (melt powder temperature) is instantaneous. Considering that the temperature reaches about 400 ° C.
- the dimensions of the masking pin used in the present embodiment are such that when they enter the cooling hole of the combustor transition piece, they protrude by the thickness of the coating, but shrink about 10% after coating, and as a result, The dimensions do not protrude from the surface (inner peripheral surface) of the combustor transition piece (reversely, it is slightly retracted).
- the liquid silicone rubber elastic material is liquid when injected into the cooling hole, but then dries and hardens by volume shrinkage, and the hardened material becomes a masking pin inserted into the cooling hole.
- Dimensions from surface (inner surface) of combustor transition piece Adjust the injection volume so that it does not protrude.
- an air flow groove 21 is formed in the wall 20 forming the combustor transition piece of the gas turbine, and an air flow groove is formed in the inner peripheral surface 20 in.
- a cooling hole (air discharge hole) 22 communicating with 21 is formed, and an air suction hole (not shown) communicating with the air flow groove 21 is formed in an outer peripheral surface 20 out of the cooling hole.
- the hole diameter (diameter) of the cooling hole 22 and the air suction hole is larger than the groove width of the air flow groove 21.
- a liquid silicone rubber elastic body 32 is injected into a cooling hole 22 and a portion of the air flow groove 21 facing the cooling hole 22 by a syringe 31.
- the liquid silicon rubber elastic body 32 is, specifically, a liquid silicon rubber elastic body having a heat resistance of 200 to 250 ° C., such as a model number 1207F manufactured by Three Bond. Since the liquid silicone rubber elastic body 32 is in a liquid (gel-like) state, it can be easily injected into the cooling hole 22 and the portion of the air flow groove 21 facing the cooling hole 22. . However, since the liquid silicone rubber elastic body 32 has a certain degree of viscosity, it penetrates deep into the air flow groove 21 beyond the part of the air flow groove 21 facing the cooling hole 22. None.
- the injection is performed until the surface of the injected liquid silicone rubber elastic body 32 rises with respect to the inner peripheral surface 20 in. This injection amount will be described later.
- the injection can be performed using a spatula or the like instead of the syringe 31. In any case, the work is easy because only injection is required.
- the injected liquid silicone rubber elastic body 32 dries and hardens when left to stand, but shrinks in volume as it dries and hardens.
- the masking pin MP 2 inserted into the cooling hole 22 and the air flow groove 21 is formed (see FIG. 1C).
- the masking pin MP 2 protrudes from the inner peripheral surface 20 in.
- the injection amount of the liquid silicone rubber elastic body 32 is adjusted so as not to come out. That is, the masking pin MP 2 does not protrude from the surface of the cooling hole 22 as a member.
- the surface of the masking pin MP2 is pressed by hand to make it flat.
- the dimensions of the cooling hole 22 and the air flow groove 21 vary, but the masking pin MP 2 causes the liquid silicone rubber elastic material 32 injected into the cooling hole 22 and the air flow groove 21 1 to dry and harden. Therefore, it is in a state of being tightly inserted into the cooling holes 22 and the air flow grooves 21.
- the inner peripheral surface 20 in is applied to the alumina (A 1 2 0 3) roughening with a positive preparative process for blowing.
- the masking pin MP 2 since the masking pin MP 2 has elasticity, it does not fall out of the cooling hole 22 even if the impact acts because the anchor effect by the blasting does not work.
- MC r A 1 Y is sprayed on the inner peripheral surface 20 in to form a base metal layer (undercoat) 41.
- the masking pin MP2 has poor wettability, the sprayed metal sprayed on the masking pin MP2 is repelled, and the MCrA1Y sprayed metal is sprayed on the masking pin MP2. It hardly accumulates. Also, even if there is a case where a little deposit occurs, it can be completely removed by air blow and paper polishing.
- a ceramic material mainly composed of zirconia is sprayed onto the base metal 41 to form a thermal barrier layer (top coat) 4.
- the masking pin MP 2 does not protrude from the inner peripheral surface 20 in, MC r A 1
- MC r A 1 When Y and ceramic materials are sprayed, there is no shadow due to the projecting members, and the entire required part can be sprayed. In other words, a portion where the ceramic material is not sprayed does not occur around the inner peripheral surface 20 in due to the shadow of the thermal spray by the projecting member from the inner peripheral surface 20 in. If the unsprayed part occurs due to the shadow, the surface of the metal base material may be exposed and micro cracks may occur due to long-term use.However, due to the shadow of the spray, the ceramic material is surrounded around the inner peripheral surface 20 in. Since no parts are not sprayed, heat resistance and durability are improved. Further, since the masking pin MP2 has heat resistance, the masking pin MP2 does not scorch or melt even when spraying MCrAlY or ceramic material.
- the masking pin MP2 is hooked with a needle or a pin and removed from the cooling hole 22. Since the masking pin MP 2 has a releasability that does not stick to the cooling hole 22, no masking material remains in the cooling hole 22 and the air flow groove 21, and the entire masking pin MP 2 Can be removed cleanly (see Fig. 1G). At this time, since the masking pin MP2 can be removed using a needle or a pin, the removal operation can be easily performed.
- the heat insulation film (the base metal layer 41 and the heat insulation layer 42) can be applied to the inner peripheral surface 20 in of the wall forming the combustor transition piece.
- a thermal barrier coating can be applied to all surfaces. Therefore, the combustor transition piece is thermally protected by the thermal barrier coating, so that cracks and damage due to temperature rise do not occur, and a highly reliable combustor transition piece can be manufactured.
- the masking operation is relatively easy, since it is only the injection of the liquid silicone rubber elastic body 32 and the removal of the masking pin MP 2 with a needle or the like.
- Promising tools for this removal include needles with force relief and packing tools for gland packing removal.
- a dispenser manufactured by San-A-Tech Co., Ltd. it is possible to inject a constant pressure and a fixed amount.
- a masking pin MP3 having a cross section of a flat plate or a gutter type (or with legs) is inserted into the cooling holes 22 and the cooling holes 22 of the air flow grooves 21. Buy the part facing the.
- a masking pin MP 4 having a tapered cross section is inserted into the cooling hole 22 and the portion of the air flow groove 21 facing the cooling hole 22.
- the masking pins MP 3 and MP 4 are dimensioned so as not to protrude from the outer peripheral surface 20 in of the wall surface 20.
- the external shape of the masking pin MP3 is formed from a silicone rubber-based sheet so as to match the space shape of the cooling hole 22 and the portion of the airflow groove 21 facing the cooling hole 22. It is the one that was omitted.
- the pin size is increased by about 5% to 10% with respect to the hole diameter to increase tension and improve blast resistance.
- a tool that is press-fitted with compressed air or a piston.
- the radius of the masking pin MP 4 should match the diameter of the cooling hole 22, and the diameter of the portion of the air flow groove 21 facing the cooling hole 22. It is formed by punching with a mold.
- the masking pin MP 3 or the masking pin MP 4 has elasticity, so that it does not fall off even if vibration is applied by the plastic treatment, and since it has heat resistance, it can withstand the heat of spraying. Because of its poor wettability, the thermal barrier coating material does not accumulate, and because of its mold release properties, it can be easily removed.
- Masking pin MP3 or masking pin MP4 is dimensioned so that it does not protrude from the inner peripheral surface 20in of the wall surface 20. There is no formation of a bridging part, etc., and a heat-shielding film can be formed on necessary parts.
- the heat-shielding coating (the base metal layer 41 and the heat-shielding layer 42) can be applied to the inner peripheral surface 20 in of the wall forming the combustor transition piece, and the necessary portions can be formed. All surfaces can be coated with a ripening coating. Therefore, the combustor transition piece is thermally protected by the thermal barrier coating, and the undercoat (metal layer) also has an oxidation resistance effect, which eliminates cracks and damage due to temperature rise and provides highly reliable combustion.
- a tail pipe can be manufactured.
- the unpenetrated cooling holes formed in the wall surface of the combustor transition piece are masked, but recently, the cooling holes penetrate from the outer peripheral surface to the inner peripheral surface of the combustor transition piece wall surface. Small cooling holes may be formed. The diameter of the penetrated small hole was smaller than the diameter of the cooling hole, and the hole depth was as deep as 4 to 5 mm, making it difficult to clean after coating.
- the masking pins MP2 to MP4 used in the present embodiment can be applied to the penetrated small holes.
- Liquid masking is suitable for such small-diameter deep holes from the viewpoint of penetration, but when injected with a syringe, it does not penetrate into the interior due to surface tension but overflows. Therefore, stable injection can be performed by using a dispenser that can inject a fixed amount and a fixed amount.
- the gas turbine blades are also provided with through holes for cooling, and this embodiment is used to mask the through holes so that the through holes are not blocked when a thermal barrier coating is applied to the surface of the blade.
- the masking pins MP2 to MP4 used in the above can also be applied.
- it is suitable for all parts having a thermal spray coating by the so-called APS method or HVOF method. Is available.
- FIG. 10 to 12 are diagrams showing the shape of the masking pin of the present example.
- FIG. 10 shows a disk-shaped masking pin MP5.
- FIG. 10A is a front view
- FIG. 10B is a bottom view.
- the outer diameter is oversized to ⁇ 4.40 ⁇ 0.05, which is 10% larger than the cooling hole diameter ( ⁇ 4), to improve blast resistance by using rubber repulsion.
- ⁇ 4 the cooling hole diameter
- a masking pin corresponding to the case where the cooling hole diameter is 3 can be created. This is the same for the following models.
- an adhesive tape (not shown) is provided on the lower surface to adhere to the bottom surface of the cooling hole to enhance the effect. In this case, if the masking pin has a tapered shape with a small diameter on the lower surface, it is easy to insert the masking pin into the cooling hole while ensuring blast resistance.
- FIG. 11 shows a disc-shaped masking pin MP6 with legs.
- FIG. 11A is a front view
- FIG. 11B is a bottom view.
- the outer diameter of the disk-shaped main body 51 is oversized to ⁇ 4.40 ⁇ 0.05 by 10% larger than the cooling hole diameter ( ⁇ 4), so that the rubber repulsion force is used.
- the effect is enhanced by inserting a cylindrical protruding pin 52 extending from the center of the lower surface of the main body 51 into the air flow groove below the cooling hole.
- FIG. 12 shows a masking pin MP7 having a disk shape with legs and a projection on the periphery.
- FIG. 12A is a front view
- FIG. 12B is a bottom view.
- the outer diameter of the disk-shaped main body 53 is set to the same size as ⁇ 4.00 ⁇ 0.05 with respect to the cooling hole diameter ( ⁇ 4), but the radius is several places around it.
- These protrusions are arranged so as to be inscribed in a circle with a diameter of 4.50 ⁇ 0.05, and are oversized with respect to the diameter of the cooling hole. Let ing. Further, the effect is enhanced by inserting a cylindrical protruding pin 54 extending from the center of the lower surface of the main body 53 into the air flow groove below the cooling hole.
- each of these masking pins those having a hardness of 30 to 70 HS (spring hardness) have an effect on blast resistance.
- a hardness of 50 or 70 H S for a simple disk type and a hardness of 50 HS for a disk type with legs is superior from the viewpoints of workability, heat resistance, and blast resistance.
- FIG. 13 is an explanatory diagram showing the method for applying a thermal barrier coating of this example.
- the case where the above-described masking pin MP6 is used is shown as a representative.
- the masking pin MP 6 is inserted into the cooling hole 22 and the portion of the air flow groove 21 facing the cooling hole 22.
- the masking pin MP 6 has a dimension (for example, 0.4 mm) protruding from the inner peripheral surface 20 in of the wall surface 20 by approximately the thickness of the coating.
- MC r A 1 Y is sprayed on the inner peripheral surface 20 in to form a base metal layer (undercoat) 41, as shown in FIG. 13C.
- the sprayed metal sprayed on the masking pin MP 6 is repelled, and the MC r A 1 Y sprayed metal is sprayed on the masking pin MP 6. Is hardly deposited. Also, even if there is a case where a little deposit occurs, it can be completely removed by air blow and paper polishing.
- a thermal barrier layer (top coat) 42 is formed by spraying a ceramic material mainly composed of zirconia on the base metal 41. .
- the sprayed metal sprayed on the masking pin MP6 is repelled, and the ceramic material sprayed metal is deposited on the masking pin MP6. ⁇ There is hardly any. In addition, even if there is a case that accumulates a little, all can be removed by air blow and paper polishing.
- the masking pin MP6 shrinks by about 10% due to the heat generated during the coating process, so that it becomes buried, for example, about 0.2 mm below the top surface of the coating, facilitating subsequent care and chamfering around the hole. .
- the size of the protrusion before shrinkage may be set in advance so that the size of the protrusion after shrinking of the masking pin MP6 due to heat at the time of coating is not more than the thickness of the thermal barrier coating.
- the periphery of the coating hole is chamfered with a spherical (or cylindrical) rubber abrasive wheel 55 having an outer diameter of 10 mm and containing alumina abrasive grains.
- a tapered rubber grindstone may be used.
- the rotation speed of the rubber grindstone 55 is on the order of several thousand rpm, and the work is performed for about 10 seconds.
- “peripheral coating defects” at the time of masking removal and “coating peeling during actual operation” can be reduced.
- the point here is to take care of the mask while it is still in place. Thereby, the shavings of the coating do not need to remain inside the cooling holes.
- a rubber whetstone is used because it has good fitting and is soft, so it is possible to prevent loss at the beginning of coating shaving.
- the masking pin MP 6 After chamfering around the coating hole, hook the masking pin MP 6 with a pin with a force relief (a hook-shaped and close to straight shape) or a packing tool for removing the gland packing. Remove. Since the masking pin MP 6 has a releasability that does not seize into the cooling hole 22, no masking material remains in the cooling hole 22 and the air flow groove 21, and the masking pin MP 6 Can be completely removed (see Fig. 13F).
- the packing tool has a helical needle, which is inserted into the masking pin MP6 while rotating the needle and then easily pulled out of the masking pin MP6 by pulling in the same way as when removing a wine cork stopper. be able to.
- the cooling hole formed near the R-bend of the wall has a deformed hole shape due to sheet metal bending, and it is necessary to insert a masking pin formed by punching out a silicon rubber elastic sheet with a mold. Is difficult. Therefore, liquid silicon It is better to inject a rubber elastic body, dry and cure to form a masking pin. However, liquid silicone rubber elastic material is injected with a dispenser. This makes it possible to supply a certain amount of rubber at a constant pressure.
- liquid silicone rubber elastic bodies are roughly classified into the following two types.
- One type is a one-component RTV silicone rubber, which includes deaceton type, deoxime type, and dealcohol type. All of these react with moisture in the air to cause their respective dereactions, and they are cured to produce silicone rubber.
- the curing speed depends on the temperature and humidity of the air and how it contacts the air, but is generally about 10 to 15 hours. It is also necessary to remove dematerialization by ventilation.
- the other is a two-component RTV silicone rubber, which forms a silicone rubber by a curing reaction by mixing a curing agent and a base material. Workability is inferior to one-pack type, but deep curing is possible.
- a heat-shielding film (the base metal layer 41 and the ripening layer 42) can be applied to the inner peripheral surface 20 in of the wall forming the combustor transition piece.
- a thermal barrier coating can be applied to all sides of the part. Therefore, the combustor transition piece is thermally protected by the thermal barrier coating, so that cracks and damage due to temperature rise do not occur, and a highly reliable combustor transition piece can be manufactured.
- the thermal barrier coating method of the present invention includes a thermal barrier coating in which a thermal barrier coating is formed by thermal spraying on the surface of a member having a cooling hole formed on the surface.
- a thermal barrier coating is formed by thermal spraying on the surface of a member having a cooling hole formed on the surface.
- a masking pin that does not protrude from the surface of the member is inserted into the cooling hole, and then a thermal barrier coating is formed by thermal spraying.
- the masking pins do not protrude from the surface of the member, so that there is no shadow due to the masking pins during thermal spraying, and there is no portion where the heat-shielding film is not formed due to the shadows.
- a film can be formed. For this reason, heat resistance and durability can be excellent.
- the insertion of the masking pin prevents the cooling hole from being blocked by the thermal barrier coating.
- a method for applying a thermal barrier coating by spraying a surface of a member having a cooling hole formed on the surface thereof, wherein the cooling hole comprises: A masking step of inserting a masking pin that does not protrude from the surface of the member, a blasting step of blasting the surface of the member to roughen the surface, and spraying the surface of the roughened member by spraying. A heat-shielding film forming step of forming a heat-shielding film.
- the masking is performed before the blasting process, the surface roughened by the blasting process is not disturbed, and a good thermal barrier coating can be formed.
- a thermal barrier film can be formed on the entire surface of the member without being shaded by the masking pins during thermal spraying. Further, the cooling holes are not blocked by the thermal barrier film due to the insertion of the masking pins.
- a method for applying a thermal barrier coating by spraying a surface of a member having a cooling hole formed on the surface thereof, wherein the cooling hole comprises: After inserting a masking pin that protrudes from the surface of the film by the thickness of the thermal barrier coating, the thermal barrier coating is formed by thermal spraying.
- a thermal barrier coating method for forming a thermal barrier coating by thermal spraying on a surface of a member having a cooling hole formed on a surface thereof, wherein the masking pin projects from the surface of the member to the cooling hole.
- the size of the protrusion after the shrinkage of the masking pin due to the heat during thermal spraying is made smaller than the thickness of the thermal barrier coating. .
- the masking pin shrinks by about 10% due to the heat generated when the thermal barrier coating is applied, so that the masking pin is slightly buried from the uppermost surface of the thermal barrier coating, facilitating subsequent care and chamfering around the hole. .
- the insertion of the masking pin prevents the cooling hole from being blocked by the thermal barrier coating.
- the method for applying a thermal barrier coating comprises forming a ripened coating by thermal spraying on a surface of a member having a cooling hole formed on the surface.
- the method includes a thermal barrier coating forming step of forming a thermal barrier coating by thermal spraying on the surface of the surfaced member, and a chamfering step of the thermal barrier coating around the cooling hole.
- a thermal barrier coating method for forming a thermal barrier coating by thermal spraying on a surface of a member having a cooling hole formed on the surface thereof, wherein the cooling hole protrudes from the surface of the member during thermal spraying.
- the masking since the masking is performed before the blasting process, the surface roughened by the blasting process is not disturbed, and a good thermal barrier coating can be formed.
- the masking pin shrinks by about 10% due to the heat generated during the heat-insulating coating, so that the masking pin is slightly buried from the uppermost surface of the heat-insulating coating. Furthermore, the insertion of the masking pin prevents the cooling hole from being closed by the thermal barrier coating.
- the cooling hole may be a hole that does not penetrate, or a hole that penetrates, or the member may be a combustor transition piece of a gas turbine; Is formed on the inner peripheral surface of the wall surface forming the combustor transition piece. For this reason, a good heat-shielding film can be formed on the entire inner peripheral surface of the combustor transition piece without blocking the penetrated or unpenetrated cooling holes.
- the masking pin has elasticity excellent in blast resistance, heat resistance to withstand heat by thermal spraying, and release property that the entirety can be taken out from the cooling hole after the formation of the thermal barrier coating.
- the masking pin is formed of a silicon-based rubber elastic body, or the masking pin is formed of a material having a wettability without depositing a heat-shielding film material.
- the pin is formed by drying and hardening the liquid silicone rubber elastic material injected into the cooling hole, or the masking pin is formed by punching a silicon rubber elastic sheet with a mold. It is. Therefore, a good heat-shielding film can be formed without scorching, falling off, or seizing of the masking pin.
- the masking pin of the present invention has excellent elasticity with excellent blast resistance, heat resistance to withstand the heat generated by thermal spraying, mold releasability in which the entirety can be taken out from the cooling hole after the formation of the thermal barrier coating, and excellent mounting properties.
- the thermal coating material is formed of a material having wettability without being deposited, or the masking pin is formed by drying and hardening the liquid silicon rubber elastic material injected into the cooling hole.
- the masking pin is formed by stamping a silicon rubber elastic body sinit with a mold. Therefore, a good heat-shielding film can be formed without burning, falling off, or seizing of the masking pin.
- the outer diameter of the masking pin is approximately 10% larger than the diameter of the cooling hole. This raises the tension and improves the resistance to plastic.
- the thermal barrier coating is formed on the inner peripheral surface by the above-described thermal barrier coating method, the product performance is improved without cracking or damage due to a rise in metal temperature. I do.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Coating By Spraying Or Casting (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10392994T DE10392994C5 (de) | 2002-08-02 | 2003-02-03 | Wärmesperrschicht-Beschichtungsverfahren und dessen Verwendung |
JP2004525769A JP4031794B2 (ja) | 2002-08-02 | 2003-02-03 | 遮熱皮膜施工方法,マスキングピン及び燃焼器尾筒 |
US10/500,961 US20050084657A1 (en) | 2002-08-02 | 2003-02-03 | Method for forming heat shielding film, masking pin and tail pipe of combustor |
US13/206,916 US8722144B2 (en) | 2002-08-02 | 2011-08-10 | Thermal barrier coating method, masking pin and combustor transition piece |
US13/936,662 US9051879B2 (en) | 2002-08-02 | 2013-07-08 | Thermal barrier coating method, masking pin and combustor transition piece |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002225863 | 2002-08-02 | ||
JP2002-225863 | 2002-08-02 |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10500961 A-371-Of-International | 2003-02-03 | ||
US10/500,961 A-371-Of-International US20050084657A1 (en) | 2002-08-02 | 2003-02-03 | Method for forming heat shielding film, masking pin and tail pipe of combustor |
US13/206,916 Division US8722144B2 (en) | 2002-08-02 | 2011-08-10 | Thermal barrier coating method, masking pin and combustor transition piece |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004013368A1 true WO2004013368A1 (ja) | 2004-02-12 |
Family
ID=31492172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/001078 WO2004013368A1 (ja) | 2002-08-02 | 2003-02-03 | 遮熱皮膜施工方法、マスキングピン及び燃焼器尾筒 |
Country Status (5)
Country | Link |
---|---|
US (3) | US20050084657A1 (ja) |
JP (1) | JP4031794B2 (ja) |
CN (1) | CN100368588C (ja) |
DE (1) | DE10392994C5 (ja) |
WO (1) | WO2004013368A1 (ja) |
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WO2023127573A1 (ja) * | 2021-12-29 | 2023-07-06 | 日本発條株式会社 | マスキング治具 |
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US11148169B2 (en) | 2014-12-03 | 2021-10-19 | Mitsubishi Power, Ltd. | Method of forming sprayed coating, high-temperature component for turbine, turbine, masking pin for forming sprayed coating, and masking member |
WO2023127573A1 (ja) * | 2021-12-29 | 2023-07-06 | 日本発條株式会社 | マスキング治具 |
Also Published As
Publication number | Publication date |
---|---|
US8722144B2 (en) | 2014-05-13 |
DE10392994C5 (de) | 2013-08-14 |
DE10392994T5 (de) | 2005-08-11 |
JP4031794B2 (ja) | 2008-01-09 |
US20140023787A1 (en) | 2014-01-23 |
US20050084657A1 (en) | 2005-04-21 |
US9051879B2 (en) | 2015-06-09 |
DE10392994B4 (de) | 2006-12-14 |
CN100368588C (zh) | 2008-02-13 |
JPWO2004013368A1 (ja) | 2006-08-03 |
US20110293836A1 (en) | 2011-12-01 |
CN1625609A (zh) | 2005-06-08 |
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