Blade laser cladding repair support device and method for blisk

Abstract

The application belongs to the technical field of laser cladding, and discloses a kind of integral blade disk blade laser cladding repair support device and method, including leaf edge auxiliary support component, leaf edge auxiliary support component includes with the first base plate of same material of blade to be repaired;First base plate is set up installation groove, and the bottom of installation groove is set up split joint structure, and the section line of both sides of split joint structure is respectively within 0.15mm offset 0.15mm to the intersection line of the inverted trapezoidal defect of blade to be repaired and leaf back and leaf basin with leaf edge defect of blade to be repaired into inverted trapezoidal structure, and inverted trapezoidal defect is obtained;Two leaf edge auxiliary support components are used, and respectively along the inclined edge of inverted trapezoidal defect is clamped into the leaf edge of blade to be repaired;Inverted trapezoidal defect is carried out laser cladding repair, and after repair, it is milled to required size and surface roughness.Effective solution is found to the problems such as low mechanical property, leaf edge ablation, low processing efficiency and substrate deformation in the process of conventional laser cladding of integral blade disk blade, and the quality and pass rate after repair are extremely high.

Description

Technical Field

[0001] This invention belongs to the field of laser cladding technology and relates to a support device and method for laser cladding repair of integral bladed disk blades. Background Technology

[0002] Integral bladed disks (IBDs) are key components for achieving weight reduction and stage reduction in turbofan engines with a thrust-to-weight ratio of 10 or higher. Due to their harsh operating environment, IBDs are susceptible to various types of damage during service, with blade damage from foreign objects being the most common. Directly scrapping damaged IBDs would result in significant waste. Laser cladding technology can repair IBDs damaged during production and service. It involves three-dimensional grouting at the damaged area, combined with subsequent machining to restore the IBD's dimensional dimensions. Laser cladding not only improves material surface properties but also repairs defective parts, thereby reducing the production cost of replacing new parts and showing broad application prospects in the aerospace industry.

[0003] However, the blade thickness of an integral bladed disk is generally around 1 mm, with the thinnest parts at the inlet and exhaust edges being about 0.3–0.4 mm. When repairing such blades using conventional laser cladding technology, insufficient laser power can easily lead to incomplete fusion defects, while excessive laser power can cause burning of the substrate edges, forming pits and causing substrate deformation. Therefore, variable power processing is generally used, employing higher laser power to clad and repair thicker parts of the substrate, and lower laser power and a lower speed to clad and repair thinner parts. However, due to the harsh working environment and very high mechanical performance requirements of integral bladed disks, it is difficult to accurately control the laser power, often resulting in problems such as low mechanical properties of the repaired parts, blade edge ablation, low processing efficiency, and substrate deformation. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a support device and method for laser cladding repair of integral bladed disk blades.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] In a first aspect, the present invention provides a support device for laser cladding repair of integral bladed disk blades, including a blade edge auxiliary support component. The blade edge auxiliary support component includes a first substrate made of the same material as the blade to be repaired. An installation groove is formed on the first substrate, and a splitting structure is formed at the bottom of the installation groove. The cross-sectional lines on both sides of the splitting structure are offset within 0.15mm from the intersection lines of the inverted trapezoidal defect of the blade to be repaired and the blade back and blade base.

[0007] Optionally, the length of the first substrate is equal to the length of the hypotenuse of the inverted trapezoidal defect of the blade to be repaired; the width of the opening end of the slit structure is twice the minimum thickness of the blade edge; and the width of the area of ​​the first substrate located on both sides of the mounting groove is 0.5 to 1.0 mm.

[0008] Optionally, it also includes a blade tip auxiliary support assembly; the blade tip auxiliary support assembly includes a second substrate made of the same material as the blade to be repaired; the second substrate is an open part, the inner contour of the second substrate is offset by the cross-sectional curve of the blade tip of the blade to be repaired within 0.15mm, and the outer contour of the second substrate is offset by the inner contour by 0.6 to 1.0mm.

[0009] Optionally, the thickness of the blade edge auxiliary support assembly and the blade tip auxiliary support assembly is 1.2 to 1.5 mm.

[0010] In a second aspect, the present invention provides a method for laser cladding repair of integral bladed disk blades, comprising: shaping the blade edge defect of the blade to be repaired into an inverted trapezoidal structure to obtain an inverted trapezoidal defect; using two of the above-mentioned blade edge auxiliary support components to respectively insert into the blade edge of the blade to be repaired along the inclined side of the inverted trapezoidal defect; performing laser cladding repair on the inverted trapezoidal defect, and milling it to the required size and surface roughness after repair.

[0011] Optionally, the hypotenuse of the inverted trapezoidal defect is parallel to the upper surface of the leaf-edge auxiliary support assembly.

[0012] Optionally, the method also includes: removing the blade tip defect of the blade to be repaired as a whole to obtain the blade tip defect repair area; using the blade tip auxiliary support component described above to hold the blade tip of the blade to be repaired, and ensuring that the upper surface of the blade tip auxiliary support component is higher than the plane of the blade tip defect repair area; performing laser cladding repair on the blade tip defect repair area of ​​the blade to be repaired, and milling it to the required size and surface roughness after repair.

[0013] Optionally, the laser cladding repair is performed in an argon-protected chamber with an oxygen content of less than 5 ppm, and the argon flow rate Q = 4.5~5.5 L / min.

[0014] Optionally, the blade edge auxiliary support assembly is prepared by the following steps: obtaining the dimensional parameters of the blade edge auxiliary support assembly; cutting the first substrate using argon as an auxiliary gas and laser cutting according to the dimensional parameters of the blade edge auxiliary support assembly to obtain the initial blade edge auxiliary support assembly; polishing the surface of the initial blade edge auxiliary support assembly and wiping it with anhydrous ethanol or acetone and degreased cotton; and preparing the blade tip auxiliary support assembly by the following steps: obtaining the dimensional parameters of the blade tip auxiliary support assembly; cutting the second substrate using argon as an auxiliary gas and laser cutting according to the dimensional parameters of the blade tip auxiliary support assembly to obtain the initial blade tip auxiliary support assembly; polishing the surface of the initial blade tip auxiliary support assembly and wiping it with anhydrous ethanol or acetone and degreased cotton.

[0015] Optionally, before laser cladding repair of the inverted trapezoidal defect, the inverted trapezoidal defect is sanded with sandpaper, and the surface of the inverted trapezoidal defect is wiped with anhydrous ethanol or acetone and degreased cotton; before laser cladding repair of the leaf tip defect repair area of ​​the leaf to be repaired, the leaf tip defect repair area is sanded with sandpaper, and the surface of the leaf tip defect repair area is wiped with anhydrous ethanol or acetone and degreased cotton.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention relates to a support device for laser cladding repair of integral bladed disk blades. The blade edge auxiliary support component matches the blade profile, resulting in a good fit and convenient installation. It eliminates the need for spot welding or other fixing methods, relying solely on the friction and clamping force between the inner surface of the blade edge auxiliary support component and the blade to fix the component to the blade. This effectively improves the stability of the blade during the laser cladding repair process and increases the repair power. Conventional laser cladding repair of integral bladed disk blade defects typically requires 2-3 passes with a single cladding width of approximately 1.2mm. With the assistance of the blade edge auxiliary support component, the single cladding width can be increased from 1.2mm for low-power cladding to 2mm, requiring only one pass to repair the defect. This significantly reduces the complexity of the cladding repair process, resulting in high processing efficiency, minimal substrate deformation, no blade edge ablation, and mechanical properties that meet the requirements for integral bladed disk repair, far exceeding the performance indicators of conventional laser cladding repair. It effectively solves the problems of low mechanical properties, blade edge ablation, low processing efficiency and substrate deformation that occur in the conventional laser cladding process of integral bladed disk blades. Moreover, with the assistance of the blade edge auxiliary support component, the quality and pass rate of integral bladed disk blades repaired by laser cladding are extremely high.

[0018] Furthermore, similar to the blade edge auxiliary support assembly, the blade edge auxiliary support assembly is designed to provide auxiliary support for laser cladding repair of blade tip defects. The inner contour of the second substrate is offset by less than 0.15mm from the cross-sectional curve of the required repair position of the blade tip, so as to ensure that the blade tip auxiliary support assembly can be fixed on the blade by the friction of the inner surface alone, without the need for spot welding or other fixing methods. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the leaf-edge auxiliary support component structure according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the blade tip auxiliary support component structure according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the blade tip auxiliary support component in use according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings:

[0025] See Figure 1In one embodiment of the present invention, a support device for laser cladding repair of integral bladed disk blades is provided, including a blade edge auxiliary support component. The blade edge auxiliary support component includes a first substrate made of the same material as the blade to be repaired. An installation groove is formed on the first substrate, and a splitting structure is formed at the bottom of the installation groove. The cross-sectional lines on both sides of the splitting structure are offset within 0.15mm from the intersection line of the inverted trapezoidal defect of the blade to be repaired and the blade back and blade base.

[0026] This invention relates to a support device for laser cladding repair of integral bladed disk blades. The blade edge auxiliary support component matches the blade profile, resulting in a good fit and convenient installation. It eliminates the need for spot welding or other fixing methods, relying solely on the friction and clamping force between the inner surface of the blade edge auxiliary support component and the blade to fix the component to the blade. This effectively improves the stability of the blade during the laser cladding repair process and increases the repair power. Conventional laser cladding repair of integral bladed disk blade defects typically requires 2-3 passes with a single cladding width of approximately 1.2mm. With the assistance of the blade edge auxiliary support component, the single cladding width can be increased from 1.2mm for low-power cladding to 2mm, requiring only one pass to repair the defect. This significantly reduces the complexity of the cladding repair process, resulting in high processing efficiency, minimal substrate deformation, no blade edge ablation, and mechanical properties that meet the requirements for integral bladed disk repair, far exceeding the performance indicators of conventional laser cladding repair. It effectively solves the problems of low mechanical properties, blade edge ablation, low processing efficiency and substrate deformation that occur in the conventional laser cladding process of integral bladed disk blades. Moreover, with the assistance of the blade edge auxiliary support component, the quality and pass rate of integral bladed disk blades repaired by laser cladding are extremely high.

[0027] In one possible implementation, see again Figure 1 The outer contour of the blade edge auxiliary support component is a symmetrical shape. The length of AB is determined by the size of the inverted trapezoidal defect to be repaired, and is generally equal to the length of the hypotenuse of the defect. AI and DE have lengths of 0.5–1.0 mm. The inner contour HGF of the blade edge auxiliary support component is a slit structure. HG and FG are the intersection lines of the inverted trapezoidal defect with the blade back and blade base, respectively. The machining deviation is controlled within 0.15 mm. The width of the slit structure opening HF varies according to actual needs, generally being twice the minimum thickness of the blade edge. The lengths of HI and EF can be flexibly adjusted according to the length of the hypotenuse of the inverted trapezoidal defect. Based on the above structural design, the blade edge auxiliary support component can be ensured to fit tightly against the blade profile of the area to be repaired. During use, the blade edge auxiliary support component is pushed along the hypotenuse of the inverted trapezoidal defect and locked onto the blade edge. No spot welding or other fixing methods are required; the friction and clamping force between the inner surface of the blade edge auxiliary support component and the blade are sufficient to fix the component to the blade.

[0028] In one possible implementation, see Figure 2 and 3 The integral bladed disk blade laser cladding repair support device also includes a blade tip auxiliary support component; the blade tip auxiliary support component includes a second substrate made of the same material as the blade to be repaired; the second substrate is an open part, the inner contour of the second substrate is offset by the cross-sectional curve of the blade tip of the blade to be repaired within 0.15mm, and the outer contour of the second substrate is offset by the inner contour by 0.6 to 1.0mm.

[0029] Specifically, similar to the blade edge auxiliary support component, the blade edge auxiliary support component is designed to provide auxiliary support for laser cladding repair of blade tip defects. The inner contour of the second substrate is offset by less than 0.15mm from the cross-sectional curve of the blade tip of the blade to be repaired, so as to ensure that the blade tip auxiliary support component can be fixed on the blade by the friction of the inner surface alone, without the need for spot welding or other fixing methods.

[0030] The first substrate, the second substrate, and the general and the integral bladed disk to be repaired are all made of the same material and in the same state. The thickness can be determined according to the power used in the laser cladding repair, and is generally 1.2 to 1.5 mm. The surface of the substrate is usually polished clean before use.

[0031] In another embodiment of the present invention, a method for laser cladding repair of integral bladed disk blades is provided, comprising the following steps: shaping the blade edge defect of the blade to be repaired into an inverted trapezoidal structure to obtain an inverted trapezoidal defect; using two of the above-mentioned blade edge auxiliary support components to respectively insert into the blade edge of the blade to be repaired along the inclined side of the inverted trapezoidal defect; performing laser cladding repair on the inverted trapezoidal defect, and milling it to the required size and surface roughness after repair.

[0032] In one possible implementation, the integral bladed disk blade laser cladding repair method further includes the following steps: removing the blade tip defect of the blade to be repaired as a whole to obtain the blade tip defect repair area; using the above-mentioned blade tip auxiliary support component to hold the blade tip of the blade to be repaired, and ensuring that the upper surface of the blade tip auxiliary support component is higher than the plane of the blade tip defect repair area; performing laser cladding repair on the blade tip defect repair area of ​​the blade to be repaired, and milling it to the required size and surface roughness after repair.

[0033] In one possible implementation, the method for laser cladding repair of integral bladed disk blades involves, before laser cladding repair of the inverted trapezoidal defect, sanding the inverted trapezoidal defect with sandpaper and wiping the surface of the inverted trapezoidal defect with anhydrous ethanol or acetone and degreased cotton; before laser cladding repair of the blade tip defect repair area, sanding the blade tip defect repair area with sandpaper and wiping the surface of the blade tip defect repair area with anhydrous ethanol or acetone and degreased cotton.

[0034] Optionally, the laser cladding repair method for integral bladed disks can be further subdivided into the following steps:

[0035] First, the damage to the blade tip and blade edge is classified according to its condition, with the blade edge including the intake edge and the exhaust edge. Then, the defect location on the blade edge is repaired into an inverted trapezoidal structure to obtain an inverted trapezoidal defect. The blade tip defect of the blade to be repaired is completely removed to obtain the blade tip defect repair area.

[0036] Taking an inverted trapezoidal defect as an example, the defect is polished with P240 grit sandpaper until its surface reveals a metallic luster. The surface is then wiped with anhydrous ethanol or acetone and degreased cotton to remove dirt. Two blade-side auxiliary support components are inserted into the blade along the hypotenuse of the inverted trapezoidal defect. The friction and clamping force between the inner surface of the U-shaped structure at the top of the support components and the blade ensure a tight bond, guaranteeing that the hypotenuse of the inverted trapezoidal defect is approximately parallel to the upper surface of the support components. Laser cladding repair is performed using an IPG laser YLS-1000. Matching cladding parameters are selected based on the material to repair the inverted trapezoidal defect. The entire repair process is conducted in an argon-protected chamber with an oxygen content of less than 5 ppm and an argon flow rate of Q = 4.5–5.5 L / min. Finally, the clad portion of the blade is heat-treated and then milled to the required dimensions and surface roughness. For the pretreatment and laser cladding repair process of the blade tip defect repair area, please refer to the above-mentioned pretreatment and laser cladding repair process for the inverted trapezoidal defect.

[0037] In one possible implementation, the method for repairing integral bladed disk blades by laser cladding further includes preparing a blade edge auxiliary support assembly by the following steps: obtaining the dimensional parameters of the blade edge auxiliary support assembly; using argon as an auxiliary gas and laser cutting to cut the first substrate according to the dimensional parameters of the blade edge auxiliary support assembly to obtain an initial blade edge auxiliary support assembly; polishing the surface of the initial blade edge auxiliary support assembly and wiping it with anhydrous ethanol or acetone and degreased cotton.

[0038] Specifically, it is recommended to use argon as the auxiliary gas when preparing the blade edge auxiliary support assembly. After cutting, remove the remelted layer on the surface that is in contact with the part. The final size of the HGF profile should not be greater than the theoretical profile by 0.15mm, so as to ensure that the blade edge auxiliary support assembly can be fixed on the blade by the clamping force of the inner profile friction alone.

[0039] Optionally, the method for repairing the blades of the integral bladed disk by laser cladding further includes preparing a blade tip auxiliary support component by the following steps: obtaining the size parameters of the blade tip auxiliary support component; according to the size parameters of the blade tip auxiliary support component, using argon as an auxiliary gas, cutting the second substrate by laser cutting to obtain the initial blade tip auxiliary support component; polishing the surface of the initial blade tip auxiliary support component and wiping it with anhydrous ethanol or acetone and degreased cotton.

[0040] Specifically, it is recommended to use argon as the assist gas when fabricating the blade tip auxiliary support assembly, and remove the remelted layer on the contact surface with the part after cutting. The final machined dimension of the inner surface of the blade tip auxiliary support assembly should not exceed 0.15mm of the theoretical surface to ensure that the blade tip auxiliary support assembly can be fixed to the blade solely by the frictional force of the inner surface.

[0041] In one possible implementation, an integral bladed disk of a compressor with the following parameters is used as an example: material TC17, blade edge thickness 0.4-1.1 mm, blade edge damage depth 3.5 mm, width 10 mm, and blade component damage depth 5 mm.

[0042] 1. Preparation and processing of blade edge and tip auxiliary support components. a. Prepare a substrate of the same material and state as the overall bladed disk, with a thickness of 1.2mm. Clean the substrate surface. b. Using argon as the assist gas, laser-cut the blade edge auxiliary support component onto the substrate according to the designed pattern. Then, sand the front of the blade edge auxiliary support component with fine sandpaper and wipe its surface with anhydrous ethanol or acetone and degreased cotton. c. Extract the blade profile curve of the corresponding interface from the blade model of the overall bladed disk as the inner contour of the tip auxiliary support component. Offset the inner contour outward by 0.6mm to generate the outer contour of the tip auxiliary support component. Using argon as the assist gas, laser-cut the blade tip auxiliary support component according to the designed pattern. Then, sand the inside of the blade tip auxiliary support component with fine sandpaper and wipe its surface with anhydrous ethanol or acetone and degreased cotton.

[0043] 2. Pre-treatment of blade tip and edge defects. a. Classify blade tip and edge damage according to its severity; remove defects from the blade tip and edge separately. Blade tip defects are generally removed entirely, while edge defects are reshaped into an inverted trapezoidal structure. b. Use P240 grit sandpaper to polish the damaged areas, exposing the metallic luster of the surface to be repaired. c. Wipe the surface with anhydrous ethanol or acetone and degreased cotton to remove dirt. d. Insert two blade edge auxiliary support components along the hypotenuse of the inverted trapezoidal defect into the blade edge. Utilize the friction and clamping force between the inner surface of the U-shaped structure at the top of the blade edge auxiliary support component and the blade edge to ensure a tight bond, guaranteeing that the hypotenuse of the inverted trapezoidal defect is approximately parallel to the upper surface of the blade edge auxiliary support component. e. Insert the blade tip auxiliary support component into the blade tip, ensuring that the upper surface of the blade tip auxiliary support component is slightly higher than the blade tip plane to be repaired.

[0044] 3. Laser cladding repair. The equipment uses an IPG laser YLS-1000 with a cladding power of 350W and a cladding rate of 4.0mm / s. Alloy powder is fed into the molten pool through a coaxial powder feeding nozzle by a powder feeder at a feeding speed of 2.2g / min. The entire repair process is carried out in an argon-protected chamber with an oxygen content of less than 5ppm and an argon flow rate of Q = 4.5~5.5L / min.

[0045] 4. After heat treatment, the cladding area of ​​the blade is milled to the required dimensions and surface roughness.

[0046] The test results are as follows: a) Metallographic analysis results show that the cladding layer forms a metallurgical bond with the substrate; b) No abnormalities were found by CT and fluorescence examination, and the quality is good; c) The mechanical properties of the titanium alloy after laser cladding reach more than 100% of the forging standard; d) The final dimensions after repair meet the requirements.

[0047] This invention addresses the problem of defects in large quantities of integral bladed disk blades by providing a laser cladding repair method for integral bladed disk blades that is highly efficient, reliable, and produces stable quality repair parts. This method can solve problems such as low mechanical properties, blade edge ablation, low processing efficiency, and substrate deformation that occur during conventional laser cladding of integral bladed disk blades.

[0048] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A support device for laser cladding repair of integral bladed disk blades, characterized in that, Includes a blade edge auxiliary support assembly, which includes a first substrate made of the same material as the blade to be repaired; An installation groove is formed on the first substrate, and a splitting structure is formed at the bottom of the installation groove. The cross-sectional line of one side of the splitting structure is within 0.15mm offset from the intersection line of the inverted trapezoidal defect of the blade to be repaired and the blade back; the cross-sectional line of the other side of the splitting structure is within 0.15mm offset from the intersection line of the inverted trapezoidal defect of the blade to be repaired and the blade base. The length of the first substrate is equal to the length of the hypotenuse of the inverted trapezoidal defect of the blade to be repaired; the width of the opening end of the slit structure is twice the minimum thickness of the blade edge; the width of the area of ​​the first substrate located on both sides of the mounting groove is 0.5~1.0mm.

2. The integral bladed disk blade laser cladding repair support device according to claim 1, characterized in that, It also includes a blade tip auxiliary support component; The blade tip auxiliary support assembly includes a second substrate made of the same material as the blade to be repaired; The second substrate is an open part. The inner contour of the second substrate is offset by the cross-sectional curve of the blade tip of the blade to be repaired within 0.15mm. The outer contour of the second substrate is offset by the inner contour by 0.6~1.0mm.

3. The integral bladed disk blade laser cladding repair support device according to claim 2, characterized in that, The thickness of the blade edge auxiliary support assembly and the blade tip auxiliary support assembly is 1.2~1.5mm.

4. A method for laser cladding repair of integral bladed disk blades, characterized in that, include: The leaf edge defect of the blade to be repaired is modified into an inverted trapezoidal structure to obtain an inverted trapezoidal defect; Two blade edge auxiliary support components as described in claim 1 are used to respectively insert into the blade edge of the blade to be repaired along the hypotenuse of the inverted trapezoidal defect; Laser cladding repair is performed on inverted trapezoidal defects, and the repaired surfaces are then milled to the required dimensions and surface roughness.

5. The method for laser cladding repair of integral bladed disk blades according to claim 4, characterized in that, The hypotenuse of the inverted trapezoidal defect is parallel to the upper surface of the leaf-edge auxiliary support assembly.

6. The method for laser cladding repair of integral bladed disk blades according to claim 4, characterized in that, Also includes: The leaf tip defect of the leaf to be repaired is completely removed to obtain the leaf tip defect repair area; The blade tip auxiliary support component described in claim 2 is used to hold the blade tip of the blade to be repaired, and the upper surface of the blade tip auxiliary support component is higher than the plane of the blade tip defect repair area. Laser cladding repair is performed on the tip defect repair area of ​​the blade to be repaired, and the repaired area is then milled to the required size and surface roughness.

7. The method for laser cladding repair of integral bladed disk blades according to claim 4 or 6, characterized in that, The laser cladding repair is carried out in an argon-protected chamber with an oxygen content of less than 5 ppm, and the argon flow rate Q is 4.5 to 5.5 L / min.

8. The method for laser cladding repair of integral bladed disk blades according to claim 6, characterized in that, It also includes preparing the blade edge auxiliary support assembly through the following steps: Obtain the dimensional parameters of the leaf edge auxiliary support component; Based on the size parameters of the blade edge auxiliary support assembly, argon gas was used as the auxiliary gas, and the first substrate was cut using laser cutting to obtain the initial blade edge auxiliary support assembly. Polish the surface of the initial blade edge auxiliary support component and wipe it with anhydrous ethanol or acetone and degreased cotton. And the tip auxiliary support assembly is prepared by the following steps: Obtain the dimensional parameters of the blade tip auxiliary support component; Based on the size parameters of the blade tip auxiliary support component, argon gas was used as the auxiliary gas, and the second substrate was cut using laser cutting to obtain the initial blade tip auxiliary support component. Polish the surface of the initial blade tip auxiliary support component and wipe it with anhydrous ethanol or acetone and degreased cotton.

9. The method for laser cladding repair of integral bladed disk blades according to claim 6, characterized in that, Before laser cladding repair of the inverted trapezoidal defect, the inverted trapezoidal defect is sanded with sandpaper and the surface of the inverted trapezoidal defect is wiped with anhydrous ethanol or acetone and degreased cotton. Before performing laser cladding repair on the leaf tip defect repair area of ​​the leaf to be repaired, the leaf tip defect repair area is sanded with sandpaper, and the surface of the leaf tip defect repair area is wiped with anhydrous ethanol or acetone and degreased cotton.

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