Wax mold for controlling deformation of margin plate of high-temperature alloy guide blade and preparation method of wax mold

Abstract

The invention discloses a wax mold for controlling deformation of a high-temperature alloy guide blade margin plate and a preparation method, the guide blade wax mold comprises a small margin plate, a large margin plate, a blade body and a triangular supporting structure, four edges of the small margin plate and the large margin plate are margin plate mounting edges, and the middle area is a margin plate thin area; the triangular supporting structure is arranged in the area between the small margin plate and the large margin plate on the blade back side of the front edge end of the blade. The preparation method comprises the following steps: pressing a guide vane wax mold; casting heads are connected to the margin plate mounting edges of a small margin plate and a large margin plate located on the blade back side of the guide blade wax mold correspondingly, the casting heads, a sprue and a sprue cup are sequentially connected, and a shell is manufactured after the procedures of slurry hanging, sand spraying, drying, dewaxing and roasting; and the smelted isometric crystal high-temperature alloy is poured into the shell, cooling and shelling are conducted, the triangular supporting structure is cut off, and then the guide blade casting capable of controlling deformation of the margin plate is obtained. The method can control the deformation of the margin plate of the isometric crystal high-temperature alloy guide vane casting with the thin-wall structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of precision casting of high-temperature alloy turbine blades, and specifically relates to a wax mold and a preparation method for controlling the deformation of a high-temperature alloy guide blade edge plate, which is particularly suitable for a cantilever structure edge plate with a long extension on the back side of the leading edge of the guide blade. Background Art

[0002] To improve performance parameters such as the power-to-weight ratio of aircraft engines, lightweight designs are often used for hot-end components. To meet these weight reduction requirements, the blade edges and blade body of high-temperature alloy guide vanes are designed with thinner walls, resulting in a thin-walled structure extending from the blade edge to the blade body. However, thin-walled structures with larger blade edges are prone to deformation, especially those with long cantilever structures, making them extremely difficult to control in terms of size.

[0003] The existing technology usually uses a correction tool to correct the edge plate part of the guide blade wax mold to reduce the degree of deformation of the edge plate. The method disclosed in the following patent technology can also be used to control the deformation of the edge plate. However, all of them have technical defects that are difficult to solve and cannot fundamentally control the deformation of the guide blade edge plate.

[0004] The invention patent with application publication number CN106238679A discloses a method for preventing local shrinkage and deformation of casting wax molds. This method integrates the metal correction block with the wax mold. After the wax mold is pressed, the wax mold and the metal correction block are taken out together. Although this method can reduce the degree of deformation of the blade wax mold, it cannot solve the problem of wax mold deformation after removing the metal correction block, nor can it solve the problem of wax mold deformation during subsequent shell making and pouring.

[0005] The invention patent with application publication number CN105290324A discloses a deformation-resistant preparation process for large-size turbine guide blades. This process adds support columns to the already prepared blade mold shell and performs high-temperature creep resistance treatment on the corners of the edge plate mold shell. Although this process can improve the creep resistance of the entire edge plate, it cannot solve the problem of edge plate deformation during the wax mold preparation stage.

[0006] The invention patent with application publication number CN103537652A discloses a precision casting method for preventing deformation of high-pressure turbine guide blades. This method adds process ribs to the easily deformed parts of the edge plate of the wax mold of the casting to prevent deformation. However, in this method, if the process ribs are added after the wax mold is pressed, the shrinkage deformation from the wax mold removal to the process rib bonding stage cannot be solved; if the process ribs are designed in the wax mold, the difficulty of mold design and manufacturing will be increased, and it will also bring inconvenience to the wax mold removal; in addition, adding process ribs cannot solve the problem of deformation in the same direction at two positions.

[0007] Therefore, there is an urgent need to develop a wax mold and a preparation method for controlling the deformation of a high-temperature alloy guide blade edge plate to solve the problems existing in the prior art. Summary of the Invention

[0008] In order to solve the problems existing in the prior art, the present invention provides a wax mold for controlling the deformation of a high-temperature alloy guide blade edge plate, wherein the guide blade is an equiaxed crystal high-temperature alloy guide blade; the guide blade wax mold includes a small edge plate, a large edge plate, a blade body and a triangular support structure, the four sides of the small edge plate and the large edge plate are all edge plate mounting edges, and the middle area is all an edge plate thin area, and the triangular support structure is arranged in the area between the small edge plate and the large edge plate on the back side of the leading edge of the blade.

[0009] Preferably, the small edge plate, the large edge plate, the blade body and the triangular support structure are integrally formed, or after the small edge plate, the large edge plate and the blade body are integrally formed, the triangular support structure is bonded to the area between the small edge plate and the large edge plate on the back side of the leading edge of the blade.

[0010] In any of the above schemes, it is preferred that the triangular support structure has three support points, namely the first support point, the second support point and the third support point; the first support point is arranged on the edge plate mounting edge of the small edge plate, the second support point is arranged on the edge plate mounting edge of the large edge plate, and the third support point is arranged on the back of the blade.

[0011] In any of the above schemes, it is preferred that on the small edge plate, the edge plate mounting edge at the leading edge of the blade and the edge plate mounting edge on the back side of the blade intersect to form an edge plate tip, and the line connecting the inner and outer vertices of the edge plate tip on the inner side of the small edge plate is used as the setting area of ​​the first support point.

[0012] In any of the above schemes, it is preferred that on the large edge plate, the edge plate mounting edge at the leading edge of the blade and the edge plate mounting edge at the back side of the blade intersect to form an edge plate tip, and the line connecting the inner and outer vertices of the edge plate tip on the inner side of the large edge plate is used as the setting area of ​​the second support point.

[0013] In any of the above schemes, it is preferred that on the blade body, a first boundary is formed by moving a certain distance on the blade back toward the large edge plate with the transition edge between the inner side of the small edge plate and the blade back as the starting point, and the distance is one third of the length of the leading edge of the blade between the inner side of the small edge plate and the inner side of the large edge plate.

[0014] Starting from the transition edge between the inner side of the large edge plate and the blade back, move a certain distance on the blade back toward the small edge plate to form a second boundary. The distance is one third of the length of the blade leading edge between the inner side of the small edge plate and the inner side of the large edge plate.

[0015] The line connecting the maximum overlapping circle of the leaf cavity and the tangent point of the leaf back is used as the third boundary.

[0016] An area enclosed by the first boundary, the second boundary, the third boundary and the leading edge of the blade is used as an area for setting the third supporting point.

[0017] In any of the above solutions, preferably, the first supporting point, the second supporting point and the third supporting point are connected by a ceramic round rod, and the diameter of the ceramic round rod is 2-3 times the thickness of the thin area of ​​the edge plate.

[0018] In any of the above schemes, it is preferred that the back side of the blade body faces the straight runner, and the straight runner is connected to the pouring cup; the edge plate mounting edges of the small edge plate and the large edge plate located on the back side of the blade are respectively provided with pouring risers, and the pouring risers are connected to the straight runner.

[0019] In any of the above schemes, it is preferred that the edge plate mounting edge of the pouring riser is parallel to the straight runner, and the pouring riser is perpendicular to the straight runner; the cross-section of the pouring riser is an inverted trapezoid, and the angle between the two oblique sides of the inverted trapezoid is 20°-40°; the thickness of the root of the pouring riser is the same as the thickness of the corresponding edge plate mounting edge; the height of the pouring riser on the small edge plate is less than the height of the pouring riser on the large edge plate, and the height of the pouring riser on the small edge plate is 20mm-40mm.

[0020] The present invention also provides a method for preparing a high-temperature alloy guide blade with controlled edge plate deformation, using any of the wax molds for controlling the edge plate deformation of the high-temperature alloy guide blade described above, and comprising the following steps in order:

[0021] Step 1: According to the designed guide blade wax model structure, a guide blade wax model is pressed by a hot injection molding method; alternatively, a blade wax model integrally formed by a small edge plate, a large edge plate, and a blade body and a triangular support structure wax model are pressed separately by a hot injection molding method, and then the triangular support structure wax model is bonded to the area between the small edge plate and the large edge plate on the back side of the blade leading edge end of the blade wax model according to the designed positional relationship to form a guide blade wax model; a plurality of guide blade wax models are assembled into a module;

[0022] Step 2: Connect the risers to the edge mounting edges of the small edge plate and the large edge plate on the back side of the guide vane wax mold respectively, and then connect the risers, sprue, and pouring cup in sequence to form a pouring system. The mold shell is then obtained after the steps of slurry coating, sand pouring, drying, dewaxing, core melting, and baking.

[0023] Step 3: Pour the melted equiaxed high-temperature alloy into the shell, remove the shell after cooling, and cut off the pouring cup, sprue, pouring riser and triangular support structure to obtain a guide blade casting that can control the deformation of the edge plate.

[0024] In the present invention, the hot injection molding method, shell preparation method (including slurry coating, sand sprinkling, drying, dewaxing, core melting, roasting and other processes), smelting and pouring process, shelling method, mechanical processing method (including cutting, grinding, etc.) are all traditional processes. There are no special requirements for the process flow, process parameters, equipment used, etc., as long as the shape and size of the triangular support structure and the setting positions of the three support points on the small edge plate mounting edge, the large edge plate mounting edge and the blade body meet the requirements of the present invention.

[0025] In the present invention, the line connecting the maximum cumulative circle in the blade cavity and the tangent point on the blade back is used as the third boundary. Within the blade cavity, there are countless cross sections between the small and large edge plates. Each cross section has a circle with the largest diameter, and each circle has a tangent point with the blade back. Countless circles with the largest diameters are cumulatively superimposed, and countless tangent points are connected on the blade back to form a curve, which serves as the third boundary.

[0026] Thin-walled blades, especially those with edge plates extending long beyond the blade body, that is, blades with large cantilever structures, are very prone to deformation at the edge plate. Support points are set at the edge plate and the blade body, and ceramic rods are used to connect the support points. After the shell is coated, a triangular support structure is formed. The stability principle of the triangular structure is used to prevent the deformation of the edge plate, which can effectively control the deformation of the blade edge plate.

[0027] The wax pattern and preparation method for controlling deformation of a high-temperature alloy guide blade edge plate of the present invention have the following beneficial effects:

[0028] (1) The present invention designs a triangular support structure and sets the triangular support structure in the area between the small edge plate and the large edge plate on the back side of the leading edge of the blade. The shape, size and setting positions of the three support points on the small edge plate, the large edge plate and the blade body are strictly limited. This design can control the edge plate deformation of the thin-walled equiaxed crystal high-temperature alloy guide blade casting, and is particularly suitable for the cantilever structure edge plate extending longer on the back side of the leading edge of the guide blade.

[0029] (2) The present invention can quickly realize the design of the triangular support structure and the location of the three support points, while meeting the control of the deformation of the edge plate of the thin-walled equiaxed crystal high-temperature alloy guide blade casting, increasing the precision casting process window of the guide blade, and improving the quality stability and qualified rate of the guide blade.

[0030] (3) The triangular support structure designed in the present invention can prevent the blade from deforming relative to the blade body, including preventing the blade edge plates from deforming in opposite directions and in the same direction, thereby improving the dimensional stability and qualified rate of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1A schematic structural diagram of a wax mold assembly (including two guide blade wax molds) in a preferred embodiment of a wax mold and a preparation method for controlling deformation of a high-temperature alloy guide blade edge plate according to the present invention;

[0032] Figure 2 for Figure 1 A schematic structural diagram of the guide vane wax mold in the illustrated embodiment;

[0033] Figure 3 for Figure 1 A schematic structural diagram of the guide vane wax model from another perspective in the illustrated embodiment;

[0034] Figure 4 for Figure 1 The area where the first support point is provided in the triangular support structure of the illustrated embodiment;

[0035] Figure 5 for Figure 1 The area where the second support point is provided in the triangular support structure of the illustrated embodiment;

[0036] Figure 6 for Figure 1 The area where the third support point is provided in the triangular support structure of the illustrated embodiment;

[0037] Figure 7 for Figure 1 A schematic diagram of the structure and location of the pouring and rising head in the embodiment shown;

[0038] Figure 8 for Figure 1 Dimensional inspection diagram of the edge plate of the equiaxed high-temperature alloy guide vane prepared in the embodiment shown.

[0039] Notes in the figure:

[0040] 1-guide vane wax mold, 101-small edge plate, 102-large edge plate, 103-blade body, 104-triangular support structure, 105-edge plate mounting edge, 106-edge plate thin area, 107-blade leading edge, 108-blade back, 109-first support point, 110-second support point, 111-third support point, 112-first boundary, 113-second boundary, 114-third boundary, 115-ceramic round rod;

[0041] 2-sprue;

[0042] 3- pouring cup;

[0043] 4-gating riser, 401-inverted trapezoid, 402-gating riser root;

[0044] A-the setting area of ​​the first support point;

[0045] B-the area where the second support point is set;

[0046] C-The area where the third support point is set. DETAILED DESCRIPTION

[0047] In order to further understand the content of the present invention, the present invention will be described in detail below with reference to specific embodiments.

[0048] Example 1:

[0049] like Figure 1-7 As shown, according to a preferred embodiment of the wax mold for controlling the deformation of the edge plate of a high-temperature alloy guide blade according to the present invention, the guide blade is an equiaxed crystal high-temperature alloy guide blade; the guide blade wax mold 1 includes a small edge plate 101, a large edge plate 102, a blade body 103 and a triangular support structure 104, the four sides of the small edge plate 101 and the large edge plate 102 are all edge plate mounting edges 105, and the middle area is all an edge plate thin area 106, and the triangular support structure 104 is arranged in the area between the small edge plate 101 and the large edge plate 102 on the side of the blade back 108 at the end of the blade leading edge 107.

[0050] The small edge panel 101, the large edge panel 102, the blade body 103 and the triangular support structure 104 are integrally formed, or after the small edge panel 101, the large edge panel 102 and the blade body 103 are integrally formed, the triangular support structure 104 is bonded to the area between the small edge panel 101 and the large edge panel 102 on the side of the blade back 108 at the end of the blade leading edge 107.

[0051] The triangular support structure 104 has three support points, namely a first support point 109, a second support point 110 and a third support point 111; the first support point 109 is arranged on the edge plate mounting edge 105 of the small edge plate 101, the second support point 110 is arranged on the edge plate mounting edge 105 of the large edge plate 102, and the third support point 111 is arranged on the blade back 108 of the blade body 103.

[0052] On the small edge plate 101, the edge plate mounting edge 105 at the leading edge 107 end of the blade and the edge plate mounting edge 105 on the back 108 side of the blade intersect to form an edge plate tip, and the line connecting the inner and outer vertices of the edge plate tip on the inner surface of the small edge plate 101 is used as the setting area A of the first support point.

[0053] On the large edge plate 102, the edge plate mounting edge 105 at the leading edge 107 end of the blade and the edge plate mounting edge 105 on the back 108 side of the blade intersect to form an edge plate tip, and the line connecting the inner and outer vertices of the edge plate tip on the inner surface of the large edge plate 102 is used as the setting area B of the second support point.

[0054] On the blade body 103, a first boundary 112 is formed by moving a certain distance on the blade back 108 toward the large edge plate 102 with the transition edge between the inner side of the small edge plate 101 and the blade back 108 as the starting point. The distance is one third of the length of the blade leading edge 107 between the inner side of the small edge plate 101 and the inner side of the large edge plate 102.

[0055] Starting from the transition edge between the inner side of the large edge plate 102 and the blade back 108, a certain distance is moved on the blade back 108 toward the small edge plate 101 to form a second boundary 113. The distance is one third of the length of the blade leading edge 107 between the inner side of the small edge plate 101 and the inner side of the large edge plate 102.

[0056] The line connecting the maximum cumulative circle of the blade cavity and the tangent point on the blade back serves as the third boundary 114. The area enclosed by the first boundary 112, the second boundary 113, the third boundary 114, and the blade leading edge 107 serves as the third support point location area C. In this embodiment, within the blade cavity, there are countless cross sections between the small edge plate and the large edge plate. Each cross section has a circle with the largest diameter, and each circle has a tangent point with the blade back. Countless circles with the largest diameters are cumulatively superimposed, and countless tangent points connect on the blade back to form a curve, which serves as the third boundary.

[0057] The first supporting point 109 , the second supporting point 110 and the third supporting point 111 are connected by a ceramic round rod 115 . The diameter of the ceramic round rod 115 is 2.5 times the thickness of the edge plate thin area 106 , and can be controlled within the range of 2-3 times.

[0058] The back 108 of the blade body 103 faces the sprue 2, and the sprue 2 is connected to the pouring cup 3; the edge plate mounting edges 105 on the small edge plate 101 and the large edge plate 102 located on one side of the back 108 of the blade are respectively provided with pouring risers 4, and the pouring risers 4 are connected to the sprue 2.

[0059] The edge plate mounting edge 105 of the pouring riser 4 is arranged to be parallel to the sprue 2, and the pouring riser 4 is perpendicular to the sprue 4; the cross section of the pouring riser 4 is an inverted trapezoid 401, and the angle between the two oblique sides of the inverted trapezoid 401 is 30°, which can be controlled within the range of 20°-40°; the thickness of the pouring riser root 402 is the same as the thickness of the corresponding edge plate mounting edge 105; the height of the pouring riser 4 on the small edge plate 101 is less than the height of the pouring riser 4 on the large edge plate 102, and the height of the pouring riser 4 on the small edge plate 101 is 30 mm, which can be controlled within the range of 20 mm-40 mm.

[0060] This embodiment further provides a method for preparing a high-temperature alloy guide blade with controlled edge plate deformation, using the wax mold for controlling the edge plate deformation of the high-temperature alloy guide blade, and comprising the following steps in order:

[0061] Step 1: According to the designed guide blade wax model structure, a guide blade wax model is pressed by a hot injection molding method; alternatively, a blade wax model integrally formed by a small edge plate, a large edge plate, and a blade body and a triangular support structure wax model are pressed separately by a hot injection molding method, and then the triangular support structure wax model is bonded to the area between the small edge plate and the large edge plate on the back side of the blade leading edge end of the blade wax model according to the designed positional relationship to form a guide blade wax model; a plurality of guide blade wax models are assembled into a module;

[0062] Step 2: Connect the risers to the edge mounting edges of the small edge plate and the large edge plate on the back side of the guide vane wax mold respectively, and then connect the risers, sprue, and pouring cup in sequence to form a pouring system. The mold shell is then obtained after the steps of slurry coating, sand pouring, drying, dewaxing, core melting, and baking.

[0063] Step 3: Pour the melted equiaxed high-temperature alloy into the shell, remove the shell after cooling, and cut off the pouring cup, sprue, pouring riser and triangular support structure to obtain a guide blade casting that can control the deformation of the edge plate.

[0064] The edge plate size test results of the equiaxed high-temperature alloy guide blade casting prepared in this embodiment are as follows: Figure 8 As shown, the required edge plate size tolerance range is ±0.15mm, and the edge plate size deviation of the test results of this embodiment is -0.02mm to +0.06mm. It can be seen that the technical solution of this embodiment controls the deformation of the edge plate.

[0065] In this embodiment, the hot injection molding method, shell preparation method (including slurry coating, sand sprinkling, drying, dewaxing, core melting, roasting and other processes), smelting and pouring process, shelling method, mechanical processing method (including cutting, grinding, etc.) are all traditional processes. There are no special requirements for the process flow, process parameters, equipment used, etc., as long as the shape, size of the triangular support structure and the setting positions of the three support points on the small edge plate mounting edge, the large edge plate mounting edge and the blade body meet the requirements of the present invention.

[0066] The wax mold and preparation method for controlling the deformation of the edge plate of a high-temperature alloy guide blade of this embodiment have the following beneficial effects: (1) a triangular support structure is designed, and the triangular support structure is set in the area between the small edge plate and the large edge plate on the back side of the leading edge of the blade, and the shape, size and setting positions of the three support points on the small edge plate, the large edge plate and the blade body need to be strictly limited. This design can control the deformation of the edge plate of a thin-walled equiaxed crystal high-temperature alloy guide blade casting, and is particularly suitable for a cantilever structure edge plate extending longer on the back side of the leading edge of the guide blade; (2) the design of the triangular support structure and the setting positions of the three support points can be quickly realized, while meeting the control of the deformation of the edge plate of a thin-walled equiaxed crystal high-temperature alloy guide blade casting, thereby increasing the precision casting process window of the guide blade; (3) the triangular support structure can prevent the blade from deforming relative to the blade body, including preventing the blade edge plates from deforming in opposite directions and in the same direction, thereby improving the dimensional stability and qualified rate of the blade.

[0067] Special Note: The technical solution of this invention involves numerous parameters, and the synergistic effects between these parameters must be comprehensively considered to achieve the beneficial effects and significant improvements of this invention. Furthermore, the value ranges of each parameter in the technical solution were obtained through extensive testing. The inventors have recorded extensive experimental data for each parameter and their combinations. Due to space limitations, the specific experimental data will not be disclosed here.

[0068] Those skilled in the art will readily appreciate that the wax pattern and preparation method for controlling deformation of a high-temperature alloy guide vane edge of the present invention encompass any combination of the components described in the Summary and Detailed Description sections of the present invention specification, as well as the components illustrated in the accompanying drawings. Due to space limitations and for the sake of clarity, not all of the various solutions resulting from these combinations are described. Any modifications, equivalent substitutions, and improvements within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A wax mold for controlling deformation of a high-temperature alloy guide vane edge plate, characterized by: The guide blade is an equiaxed crystal high-temperature alloy guide blade; the guide blade wax mold includes a small edge plate, a large edge plate, a blade body and a triangular support structure. The four sides of the small edge plate and the large edge plate are all edge plate mounting edges, and the middle area is all an edge plate thin area. The triangular support structure is arranged in the area between the small edge plate and the large edge plate on the back side of the leading edge of the blade.

2. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 1, characterized in that: The small edge plate, the large edge plate, the blade body and the triangular support structure are integrally formed, or after the small edge plate, the large edge plate and the blade body are integrally formed, the triangular support structure is bonded to the area between the small edge plate and the large edge plate on the back side of the leading edge of the blade.

3. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 2, characterized in that: The triangular support structure has three support points, namely the first support point, the second support point and the third support point; the first support point is set on the edge plate mounting edge of the small edge plate, the second support point is set on the edge plate mounting edge of the large edge plate, and the third support point is set on the back of the blade.

4. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 3, characterized in that: On the small edge plate, the edge plate mounting edge at the leading edge of the blade and the edge plate mounting edge on the back side of the blade intersect to form an edge plate tip, and the line connecting the inner and outer vertices of the edge plate tip on the inner side of the small edge plate is used as the setting area of ​​the first support point.

5. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 4, characterized in that: On the large edge plate, the edge plate mounting edge at the leading edge of the blade and the edge plate mounting edge on the back side of the blade intersect to form an edge plate tip, and the line connecting the inner and outer vertices of the edge plate tip on the inner side of the large edge plate is used as the setting area of ​​the second support point.

6. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 5, characterized in that: On the blade body, starting from the transition edge between the inner side of the small edge plate and the blade back, a first boundary is formed on the blade back moving a certain distance toward the large edge plate, where the distance is one third of the length of the leading edge of the blade between the inner side of the small edge plate and the inner side of the large edge plate; Starting from the transition edge between the inner side of the large edge plate and the blade back, a certain distance is moved on the blade back toward the small edge plate to form a second boundary. The distance is one third of the length of the leading edge of the blade between the inner side of the small edge plate and the inner side of the large edge plate. The line connecting the maximum overlapping circle of the leaf cavity and the tangent point of the leaf back is taken as the third boundary; An area enclosed by the first boundary, the second boundary, the third boundary and the leading edge of the blade is used as an area for setting the third supporting point.

7. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 6, characterized in that: The first supporting point, the second supporting point and the third supporting point are connected by a ceramic round rod, and the diameter of the ceramic round rod is 2-3 times the thickness of the thin area of ​​the edge plate.

8. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 7, characterized in that: The back side of the blade body faces the sprue, and the sprue is connected to the pouring cup; the edge plate mounting edges of the small edge plate and the large edge plate located on the back side of the blade are respectively provided with pouring risers, and the pouring risers are connected to the sprue.

9. The wax pattern for controlling deformation of a high-temperature alloy guide vane edge plate according to claim 8, characterized in that: The edge plate mounting edge of the pouring riser is parallel to the sprue, and the pouring riser is perpendicular to the sprue; the cross-section of the pouring riser is an inverted trapezoid, and the angle between the two oblique sides of the inverted trapezoid is 20°-40°; the thickness of the root of the pouring riser is the same as the thickness of the corresponding edge plate mounting edge; the height of the pouring riser on the small edge plate is less than the height of the pouring riser on the large edge plate, and the height of the pouring riser on the small edge plate is 20mm-40mm.

10. A method for preparing a high-temperature alloy guide vane for controlling edge plate deformation, characterized in that: The wax pattern for controlling deformation of a high-temperature alloy guide blade edge plate according to any one of claims 1 to 9 comprises the following steps in order: Step 1: According to the designed guide vane wax mold structure, the guide vane wax mold is pressed by hot injection molding; Alternatively, a wax mold of a blade integrally formed of a small edge plate, a large edge plate, and a blade body and a wax mold of a triangular support structure are respectively pressed by a hot injection molding method. Then, the wax mold of the triangular support structure is bonded to the area between the small edge plate and the large edge plate on the back side of the blade leading edge of the wax mold according to the designed positional relationship to form a guide vane wax mold; and a plurality of guide vane wax molds are assembled into a module group. Step 2: Connect the risers to the edge mounting edges of the small edge plate and the large edge plate on the back side of the guide vane wax mold respectively, and then connect the risers, sprue, and pouring cup in sequence to form a pouring system. The mold shell is then obtained after the steps of slurry coating, sand pouring, drying, dewaxing, core melting, and baking. Step 3: Pour the melted equiaxed high-temperature alloy into the shell, remove the shell after cooling, and cut off the pouring cup, sprue, pouring riser and triangular support structure to obtain a guide blade casting that can control the deformation of the edge plate.

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