A multi-dimensional complex component thermal barrier coating automated spraying manufacturing method

Abstract

An automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components is disclosed, relating to the field of thermal barrier coating preparation technology. This invention addresses the problems of existing methods, such as reliance on manual intervention in process transitions and lack of real-time feedback in process control. The invention involves pre-blasting protection of the component's film pores: a Teflon wire of a first diameter is inserted into the film pores, with a first length reserved on the inside; the component's spraying area is roughened by sandblasting; the pre-blasting protective material is removed, and pre-coating protection is applied: a Teflon wire of a second diameter is re-inserted into the film pores, with a second length reserved on the inside; an automated spraying program is used for the undercoat spraying, during which the workpiece temperature is monitored in real time and controlled within a predetermined temperature range, and the undercoat spraying is completed in one pass; after the undercoat spraying is completed, the thickness is measured; an automated spraying program is used for the topcoat spraying; and both the undercoat and topcoat coatings are heat-treated. This invention is used for thermal barrier coating spraying.

Description

Technical Field

[0001] This invention relates to the field of thermal barrier coating preparation technology, specifically to an automated thermal barrier coating spraying manufacturing method suitable for multi-dimensional complex components. Background Technology

[0002] During operation, the combustion system of heavy-duty gas turbines is subjected to extremely harsh operating environments, with the inner walls of combustion components constantly exposed to high temperatures, high-speed combustion gases, and intense thermal shock. To reduce the surface temperature of the substrate material and improve component durability and operational reliability, thermal barrier coatings are typically applied to the inner walls. Currently, atmospheric plasma spraying is one of the main techniques for preparing such coatings.

[0003] Chinese invention patent CN114990468A discloses a method for preparing a thermal barrier coating for the transition section of a gas turbine combustion chamber to protect the film diffusion pores. The specific steps include: cutting Teflon wire to a length of 50-100mm, passing it through the film diffusion pores with a 2-3mm margin; roughening the spraying area using sandblasting equipment; adjusting the extension length of the Teflon wire after sandblasting and cutting off the softened section; applying an adhesive layer using atmospheric plasma spraying equipment; inspecting the Teflon wire after adhesive layer application, adjusting it promptly if it falls off or changes position, and cleaning off any loose powder; applying a topcoat; after spraying, using a special tool with a diamond grinding head to open the constricted film diffusion pores; and finally, performing vacuum diffusion heat treatment and aging heat treatment.

[0004] Analysis of the above steps reveals that the following operations—cutting and trimming the Teflon wire after sandblasting, inspecting and adjusting the wire's position after applying the adhesive layer, cleaning off loose powder, and using tools to pierce each hole after coating—all require manual intervention. These processes cannot be automated through coating equipment or program control, making the entire preparation process dependent on the operator's skill and experience. The lack of automated connections between processes makes it difficult to guarantee process consistency and repeatability.

[0005] Furthermore, this invention patent does not describe online monitoring of the surface temperature of the workpiece during the spraying process, nor does it disclose real-time detection methods for coating deposition thickness or closed-loop feedback adjustment mechanisms for spraying parameters. The spraying parameters it provides are all static set values, lacking dynamic control of key process parameters.

[0006] Therefore, existing thermal barrier coating spraying methods suffer from problems such as reliance on manual intervention in process connection and lack of real-time feedback in process control, resulting in poor process consistency, unstable coating quality, and difficulty in meeting the requirements of mass production and stable production. Summary of the Invention

[0007] The purpose of this invention is to address the problems of existing thermal barrier coating spraying methods, which rely on manual intervention in process transitions and lack real-time feedback in process control, resulting in poor process consistency, unstable coating quality, and difficulty in meeting the requirements of mass production and stable manufacturing. Therefore, this invention provides an automated spraying and manufacturing method for thermal barrier coatings on multi-dimensional complex components.

[0008] The technical solution of this invention is:

[0009] An automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components includes the following steps:

[0010] Step 1: Protect the air film pores of the component before sandblasting:

[0011] A Teflon wire of the first diameter is inserted into the air film hole, with a first length reserved on the inside;

[0012] Step 2: Roughen the sprayed area of ​​the component by sandblasting;

[0013] Step 3: Remove the protective material before sandblasting and apply pre-coating protection to the air film pores of the component:

[0014] A Teflon wire of a second diameter is re-inserted into the air film hole, with a second length reserved on the inside, wherein the second diameter is smaller than the first diameter and the second length is greater than the first length;

[0015] Step 4: Use an automated spraying program to perform the base coat. During the base coat process, monitor the workpiece temperature in real time and control it within the predetermined temperature range. The base coat is completed in one go.

[0016] Step 5: After the base coat is applied, check the thickness.

[0017] Step Six: Apply the topcoat using an automated spraying program;

[0018] Step 7: Perform heat treatment on the base coat and the top coat.

[0019] Preferably, the first diameter is 0.9-1.1 mm and the first length is 2-3 mm; the second diameter is 0.6-0.8 mm and the second length is 3-4 mm.

[0020] Preferably, the predetermined temperature range in step four is 50-90°C.

[0021] Furthermore, in step two, the pressure for sandblasting roughening is 0.30-0.50 MPa, the sandblasting medium is 24-mesh white corundum sand, and the roughness after sandblasting is greater than Ra5.0.

[0022] Furthermore, the bottom layer powder in step four is a cobalt-nickel-chromium-aluminum-yttrium alloy powder, and the top layer powder in step six is ​​yttrium oxide-stabilized zirconium oxide powder.

[0023] Furthermore, the automated spraying procedures in steps four and six include: installing the spray gun, cleaning the powder feeding system, verifying the powder feeding amount, and simulating the spraying path before spraying.

[0024] Furthermore, the heat treatment in step seven includes homogenization heat treatment and aging heat treatment, wherein the homogenization heat treatment temperature is 1010±10℃ and the holding time is 2 hours, and the aging heat treatment temperature is 788±10℃ and the holding time is 8 hours.

[0025] Preferably, before step one, the method further includes: sealing and curing the parts of the component that are not allowed to be sprayed with putty, and wiping and cleaning the sprayed area of ​​the component with alcohol.

[0026] Furthermore, in step six, the powder accumulated on the inner wall is cleaned periodically during the topcoat spraying process.

[0027] Furthermore, after step six and before step seven, the process also includes: removing the protective material and using a through-hole tool to drill holes sequentially from small to large.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. This invention enables automated spraying manufacturing of complex multi-dimensional components.

[0030] This invention integrates and unifies key processes such as powder pretreatment, duct protection, surface sandblasting, automated spraying, process temperature control, and post-spraying heat treatment. This allows for continuous application of the base and top coatings under controlled conditions, avoiding the residual stress accumulation problem introduced by repeated disassembly and segmented application in traditional methods. Simultaneously, path simulation verification before spraying and programmed control during the spraying process ensure that the spray gun posture, spraying distance, and powder delivery stability all meet preset process requirements. This significantly improves the consistency and repeatability of spraying complex internal cavity structures, making it suitable for mass production and stable manufacturing.

[0031] 2. This invention effectively solves the problems of air film pore blockage and porcelain chipping.

[0032] This invention proposes a staged channel protection process for densely distributed film pore structures on the inner wall of components. Before sandblasting, a larger diameter Teflon wire is inserted into the film pores with a short allowance. After sandblasting, the original protective material is removed, and a smaller diameter Teflon wire is inserted again with a longer allowance. This solution avoids the problems of residual softened protective material and dimensional changes that may occur due to the "trimming" method used in existing patents. It effectively prevents sandblasting media and coating powder from entering the channel. At the same time, the through-hole operation uses specialized tools to process the holes sequentially from small to large, significantly reducing the risk of channel blockage and chipping of the enamel at the hole edges.

[0033] 3. This invention enables closed-loop quality control of the spraying process.

[0034] This invention establishes a real-time detection and feedback control mechanism during the spraying process. During the base coat spraying, the workpiece surface temperature is monitored online and controlled within the range of 50-90℃ to prevent overheating of the coating or underheating affecting adhesion. After the base coat is completed, thickness is measured using a test piece to confirm that it meets design requirements before proceeding with the top coat spraying. During the top coat spraying process, accumulated powder on the inner wall is cleaned periodically. These measures change the passive control mode of existing patents that rely on post-inspection or experience-based judgment, achieving the technical effects of uniform coating thickness, dense structure, and high adhesion.

[0035] 4. This invention optimizes the coating post-treatment process and improves service performance.

[0036] This invention employs a controlled heating, stable holding, and slow cooling heat treatment process after spraying. By rationally controlling the heating rate, holding temperature, and holding time, the coating and substrate are fully diffused and bonded, releasing residual spraying stress and improving the coating's microstructure and bonding strength. Compared to existing patents, this invention features a synergistic design between the heat treatment parameters and the spraying process. The heat treatment temperature (1010±10℃ homogenization + 788±10℃ aging) is matched with the material properties of the base powder (cobalt-nickel-chromium-aluminum-yttrium alloy) and the top layer powder (yttrium-stabilized zirconium oxide), further enhancing the coating's stability and service life under high-temperature and thermal shock conditions.

[0037] 5. This invention reduces reliance on human experience and improves product quality stability.

[0038] This invention transforms traditional processes that rely on operator experience and skill into quantifiable, traceable, and replicable technical solutions through automated spraying procedures, online detection and feedback, and standardized process design. Key steps such as changing protective materials before and after sandblasting, executing spraying paths, controlling temperature and thickness, and operating through holes can all be completed under program control, effectively reducing the impact of human factors on coating quality and ensuring batch-to-batch product consistency and stability. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the spraying process of the present invention. Detailed Implementation

[0040] Specific implementation method one: Combining Figure 1 This embodiment describes the following steps:

[0041] Step 1: Protect the air film pores of the component before sandblasting:

[0042] A Teflon wire of the first diameter is inserted into the air film hole, with a first length reserved on the inside;

[0043] Step 2: Roughen the sprayed area of ​​the component by sandblasting;

[0044] Step 3: Remove the protective material before sandblasting and apply pre-coating protection to the air film pores of the component:

[0045] A Teflon wire of a second diameter is re-inserted into the air film hole, with a second length reserved on the inside, wherein the second diameter is smaller than the first diameter and the second length is greater than the first length;

[0046] Step 4: Use an automated spraying program to perform the base coat. During the base coat process, monitor the workpiece temperature in real time and control it within the predetermined temperature range. The base coat is completed in one go.

[0047] Step 5: After the base coat is applied, check the thickness.

[0048] Step Six: Apply the topcoat using an automated spraying program;

[0049] Step 7: Perform heat treatment on the base coat and the top coat.

[0050] In this embodiment, a thick wire is used to plug the holes before sandblasting to prevent sand particles from entering. After sandblasting, the thick wire is removed and replaced with a thinner wire, leaving a longer length than before. This is because the thick wire has already been blasted by sand particles during sandblasting, causing surface damage. Even if the damaged section is cut off, the remaining part will still differ from the new wire, reducing its protective effect. Replacing it with a new wire eliminates this problem. The thinner wire, being longer, provides better masking during spraying, making it less likely for powder to penetrate.

[0051] In this implementation method, the workpiece temperature needs to be monitored constantly during the base coat application to ensure it remains within the set range. Excessive temperature will burn the coating, while insufficient temperature will result in poor adhesion. The thickness of the base coat should be measured immediately after application; only if the thickness is within acceptable limits should the top coat be applied.

[0052] The bottom layer of this invention is sprayed in one continuous process, avoiding interface contamination and stress problems caused by stopping the spray gun, resulting in a more complete bottom layer.

[0053] Specific Implementation Method Two: Combining Figure 1 In this embodiment, the first diameter is 0.9-1.1 mm and the first length is 2-3 mm; the second diameter is 0.6-0.8 mm and the second length is 3-4 mm.

[0054] In this embodiment, the wire of the first diameter is relatively thick and short, the purpose of which is to block the high-speed sand particles during sandblasting. The wire is thick enough that the sand particles cannot break through it; it is short enough that the part exposed after sandblasting will be softened by the sand particles, and can be pulled out and replaced with a new one.

[0055] The second diameter wire is thinner and longer than the first. During spraying, the powder particles are much finer than sand grains, which can be blocked by the thinner wire. Furthermore, the thinner wire leaves a gap between itself and the hole wall, preventing clogging and ensuring proper coating deposition. The longer length provides a larger masking area during spraying, making it less likely for powder to penetrate into the holes.

[0056] In this embodiment, the wire of the first diameter is used to resist sandblasting, and the wire of the second diameter is used to resist spraying.

[0057] Specific implementation method three: Combining Figure 1 This embodiment describes a predetermined temperature range of 50-90°C in step four.

[0058] If the predetermined temperature is below 50°C, the adhesion between the coating and the substrate will be insufficient; if it is above 90°C, the coating is prone to overheating and cracking. This embodiment controls the predetermined temperature between 50-90°C, which ensures the bonding strength while avoiding coating damage.

[0059] Specific implementation method four: Combination Figure 1 In this embodiment, the pressure for sandblasting roughening in step two is 0.30-0.50 MPa, the sandblasting medium is 24-mesh white corundum sand, and the roughness after sandblasting is greater than Ra5.0.

[0060] In this embodiment, the sandblasting roughening pressure is 0.30-0.50 MPa, and 24-mesh white corundum abrasive is used to achieve a roughness greater than Ra5.0 after sandblasting. Sufficient roughness ensures the coating adheres well.

[0061] Specific Implementation Method Five: Combining Figure 1 In this embodiment, the bottom coating powder in step four is a cobalt-nickel-chromium-aluminum-yttrium alloy powder, and the top coating powder in step six is ​​yttrium oxide-stabilized zirconium oxide powder.

[0062] In this embodiment, cobalt-nickel-chromium-aluminum-yttrium alloy powder serves as the bottom layer, providing good adhesion to the substrate and oxidation resistance; yttrium-stabilized zirconium oxide powder serves as the top layer, offering low thermal conductivity and excellent thermal insulation. Together, they form the standard structure of a thermal barrier coating, with the bottom layer responsible for adhesion and oxidation resistance, and the top layer responsible for thermal insulation—both are indispensable.

[0063] Specific Implementation Method Six: Combination Figure 1 This embodiment describes the automated spraying procedure in steps four and six, which includes: installing the spray gun, cleaning the powder feeding system, verifying the powder feeding amount, and simulating the spraying path before spraying.

[0064] In this implementation method, the spray gun is installed in the correct orientation, the powder feeding system is cleaned to prevent clogging, the powder feeding amount is checked to ensure stable powder output, and the spray path is simulated to verify that the trajectory covers the target area. These four preparations should be completed before starting the machine to avoid problems during the spraying process.

[0065] Specific implementation method seven: Combination Figure 1 This embodiment describes the heat treatment in step seven, which includes homogenization heat treatment and aging heat treatment. The homogenization heat treatment temperature is 1010±10℃ and the holding time is 2 hours. The aging heat treatment temperature is 788±10℃ and the holding time is 8 hours.

[0066] In this embodiment, the homogenization heat treatment at 1010℃ for 2 hours allows for sufficient diffusion between the base layer and the top layer, and between the coating and the substrate, releasing residual stress generated during spraying. The aging heat treatment at 788℃ for 8 hours further stabilizes the coating structure and improves the bonding strength.

[0067] Specific implementation method eight: Combination Figure 1 To explain this embodiment, before step one, the method further includes: sealing and curing the parts of the component that are not allowed to be sprayed with putty, and wiping and cleaning the sprayed area of ​​the component with alcohol.

[0068] In this embodiment, putty is used to seal non-spraying areas to prevent damage to areas that should not be sprayed during sandblasting and spraying. Flame heating helps the putty harden more firmly and the edges become neater. The spraying area is then wiped clean with alcohol to remove oil and sweat, ensuring the coating adheres well.

[0069] Specific Implementation Method Nine: Combining Figure 1 This embodiment describes a process where, in step six, the powder accumulated on the inner wall is periodically cleaned during the surface coating process.

[0070] During the topcoat spraying process, some powder will be scattered and fall onto the uncoated areas of the inner wall. Excessive powder buildup can fall onto the freshly sprayed coating surface, affecting the coating quality. Regularly cleaning away this accumulated powder prevents secondary contamination and ensures a uniform topcoat deposition.

[0071] Specific Implementation Method Ten: Combining Figure 1 This embodiment describes the following steps after step six and before step seven: removing the protective material and using a through-hole tool to drill holes sequentially from small to large.

[0072] After removing the protective material, some air film pores may still have a small amount of coating powder residue. Open the pores sequentially from smallest to largest, first using a fine tool to probe and clear the blockage, then switching to a coarser tool to enlarge them to the designed size, avoiding damaging the coating at the pore openings by using a coarse tool all at once.

[0073] Combination Figure 1 The manufacturing steps of this invention are described below:

[0074] S1: Open and inspect the base coat powder (Amdry 995C) and top coat powder (Metco 204NS) separately. After confirming that the powders are free from moisture and clumping, place them in a desiccator and put them in a drying oven for uniform drying. The drying temperature should be controlled at 80℃, and the drying time should be 2–4 hours. After drying, transfer the powder to a dry, cool environment and seal it for storage. Use it within the specified time to avoid a decrease in powder flowability due to changes in ambient humidity.

[0075] S2: Before spraying, conduct a comprehensive inspection of the atmospheric plasma spraying system, focusing on confirming the wear and coaxiality of the spray gun cathode and anode, the operating status of the cooling water system, and the air circuit sealing. Seal threaded holes and assembly holes on the workpiece that are not permitted to be sprayed with putty, and then cure the putty by flame heating. After curing, trim the edges of the putty to ensure a clear boundary between the protected area and the spraying area.

[0076] S3: Use a clean cloth dampened with alcohol to thoroughly wipe all surfaces of the workpiece's sprayed area, paying particular attention to removing oil, sweat, and any adhering particles. After wiping, keep the workpiece in a clean environment to prevent secondary contamination.

[0077] S4: Before sandblasting, use Φ1.0mm Teflon wire to protect the workpiece's holes. After moderately stretching to reduce the wire diameter, insert it into the hole and trim it inside, leaving a length of 2-3mm. Use sandblasting tape to protect and secure the outside of the workpiece to prevent the wire from falling off during sandblasting. Simultaneously, check the compressed air used for sandblasting for water and oil content. After confirming there are no abnormalities, connect the sandblasting equipment and confirm that the sandblasting medium is 24-mesh white corundum abrasive.

[0078] S5: During sandblasting, control the distance between the spray gun nozzle and the workpiece surface to be approximately 130mm, and control the sandblasting pressure within the range of 0.30~0.50MPa to ensure 100% sandblasting coverage. The surface roughness after sandblasting should be greater than Ra5.0, and the surface should exhibit a uniform sandblasting appearance. After sandblasting, do not touch the sandblasted surface with your hands; use oil-free and water-free compressed air to thoroughly clean the workpiece surface.

[0079] S6: After removing the sandblasting protective material, re-coat the channels with Φ0.7mm Teflon, adjusting the inner length to 3-4mm to ensure the Teflon direction aligns with the channel direction. Then, complete the spray gun installation, powder feeding system cleaning, powder feeding quantity verification, and spray path simulation to ensure the spray gun posture, spray distance, and powder feeding stability meet process requirements.

[0080] S7: Before spraying, start the cooling water system and flush the plasma gas pipeline. Use an automated spraying program to complete the base coat. During the spraying process, monitor the workpiece temperature in real time and control it within the range of 50–90℃. After spraying, test pieces are inspected for thickness to ensure the base coat thickness meets design requirements. The base coat process must be completed in one go, without prolonged interruptions.

[0081] S8: After the base coat is successfully applied, replace the powder feeding pipe and fill it with topcoat powder, completing the powder feeding quantity test and trial spray confirmation. Use the same automated path as the base coat for topcoat spraying. During the spraying process, adjust the spraying rhythm according to the workpiece temperature and regularly clean the accumulated powder on the inner wall to ensure uniform coating deposition.

[0082] S9: After spraying, remove the spraying tape and Teflon protective material. Use a special through-hole tool to open the holes sequentially from small to large to restore the unobstructed flow of the channels. After necessary finishing and polishing of the coating, perform vacuum heat treatment and aging heat treatment in sequence to homogenize the coating. Finally, inspect and confirm the appearance, thickness, and uniformity of the coating.

[0083] S10: After spraying and cleaning the workpiece surface and pores with protective material, the entire workpiece is placed into a vacuum heat treatment furnace for heat treatment. The heat treatment includes the following two steps:

[0084] S101. Coating homogenization heat treatment

[0085] The workpiece is loaded into the furnace at room temperature and heated uniformly with the furnace. The heating rate is controlled at 300±20℃ per hour until the set temperature of 1010±10℃ is reached.

[0086] Hold at this temperature for 2 hours, maintaining the vacuum level of the vacuum heat treatment furnace at 6.65 × 10⁻⁶. -1 Up to 1.33×10 -3 Within the Pa range.

[0087] During the insulation process, the coating is ensured to fully bond with the substrate, the residual stress of the coating is released, and the density and bonding strength of the coating are improved.

[0088] After the heat preservation is completed, the workpiece is slowly cooled to room temperature along with the furnace.

[0089] S102. Aging heat treatment of parts

[0090] The workpiece is placed into a vacuum heat treatment furnace at room temperature and then heated uniformly with the furnace. The heating rate is controlled at 300±20℃ per hour until the set temperature of 788±10℃ is reached.

[0091] Maintain the temperature for 8 hours, during which time the vacuum level inside the furnace is kept at 6.65 × 10⁻⁶. -1 Up to 1.33×10 -3 Within the Pa range.

[0092] After the heat treatment is completed, the parts are slowly cooled to room temperature in the furnace and then removed from the furnace to complete the aging heat treatment.

[0093] Through the above two-step heat treatment process, the thickness, uniformity and adhesion of the thermal barrier coating on the inner wall of the workpiece are effectively improved, while the stability and service life of the component under high temperature service conditions are also improved.

[0094] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make other changes within the spirit of the invention and apply it to fields not mentioned in the invention. Of course, all such changes made in accordance with the spirit of the invention should be included within the scope of protection claimed by the invention.

Claims

1. An automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components, characterized in that: Includes the following steps: Step 1: Protect the air film pores of the component before sandblasting: A Teflon wire of the first diameter is inserted into the air film hole, with a first length reserved on the inside; Step 2: Roughen the sprayed area of ​​the component by sandblasting; Step 3: Remove the protective material before sandblasting and apply pre-spray protection to the air film pores of the component: A Teflon wire of a second diameter is re-inserted into the air film hole, with a second length reserved on the inside, wherein the second diameter is smaller than the first diameter and the second length is greater than the first length; Step 4: Use an automated spraying program to perform the base coat. During the base coat process, monitor the workpiece temperature in real time and control it within the predetermined temperature range. The base coat is completed in one go. Step 5: After the base coat is applied, check the thickness. Step Six: Apply the topcoat using an automated spraying program; Step 7: Perform heat treatment on the base coat and the top coat.

2. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: The first diameter is 0.9-1.1 mm and the first length is 2-3 mm; the second diameter is 0.6-0.8 mm and the second length is 3-4 mm.

3. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: The predetermined temperature range in step four is 50-90℃.

4. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: In step two, the pressure for sandblasting roughening is 0.30-0.50 MPa, the sandblasting medium is 24-mesh white corundum sand, and the roughness after sandblasting is greater than Ra5.

0.

5. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: The base coat powder in step four is a cobalt-nickel-chromium-aluminum-yttrium alloy powder, and the top coat powder in step six is ​​yttrium oxide-stabilized zirconium oxide powder.

6. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: The automated spraying procedures in steps four and six include: spray gun installation, powder feeding system cleaning, powder feeding quantity verification, and spraying path simulation before spraying.

7. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: The heat treatment in step seven includes homogenization heat treatment and aging heat treatment. The homogenization heat treatment temperature is 1010±10℃ and the holding time is 2 hours. The aging heat treatment temperature is 788±10℃ and the holding time is 8 hours.

8. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: Before step one, the process also includes: sealing and curing the parts of the component that are not allowed to be sprayed with putty, and wiping and cleaning the sprayed areas of the component with alcohol.

9. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: In step six, during the topcoat spraying process, regularly clean the powder accumulated on the inner wall.

10. The automated spraying method for manufacturing thermal barrier coatings on multi-dimensional complex components according to claim 1, characterized in that: The process after step six and before step seven also includes: removing the protective material and using a through-hole tool to drill holes sequentially from small to large.

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