Blank manufacturing method of high-temperature alloy ingot and alloy blank

Abstract

The invention provides a blank manufacturing method of a high-temperature alloy ingot and an alloy blank. The method comprises the following steps: forging the high-temperature alloy ingot to obtain an alloy forging blank; carrying out heat preservation treatment on the alloy forging stock; the alloy forging stock subjected to heat preservation treatment is subjected to upsetting treatment; the alloy forging stock subjected to the upsetting treatment is subjected to punching treatment, and an alloy blank is obtained; the maximum punching pressure of the punching treatment is determined by mechanical property parameters of the alloy forging stock and deformation parameters in the punching treatment. By applying the method, the uniformity and stability of the structure and the grain size in the alloy blank can be ensured, and meanwhile, the risk of needle breakage and cracking of the alloy blank can be reduced.

Description

Technical Field

[0001] This invention relates to the field of metal hot pressure processing technology, specifically to a method for preparing a high-temperature alloy ingot and the alloy ingot itself. Background Technology

[0002] Wrought superalloys are solid solution-strengthened superalloys based on Ni-Cr-Co-Mo, possessing very high thermal strength and high deformation resistance, requiring considerable processing force during hot deformation. These difficult-to-deform superalloy tubes require billet preparation before extrusion; however, large ingots with a solidification and cooling rate of several tons have severe segregation, poor compositional and microstructure uniformity, and the high deformation resistance makes them prone to cracking and needle breakage during billet preparation.

[0003] To address the aforementioned technical problems, existing technologies, such as CN119500933A, propose a method for preparing ultra-large ring forgings, comprising: cutting GH4586 alloy bars into blanks according to the weight of the ring forging; after heat treatment at 1000~1150℃, the blanks are upset and punched to obtain a billet; after heat treatment at 1000~1150℃, the billet is expanded using a frame, and then after heat treatment at 1000~1150℃, it is pre-rolled and final-rolled to obtain a GH4586 ring forging blank; in the frame expansion process: the spacing between blanks is ≥30mm, stacking is not allowed, the heating temperature is 1000~1150℃, the holding time is 2~4h, the frame expansion of the ring blank is completed in 1~3 turns, and the total deformation is 15%~25%; then solution heat treatment and aging heat treatment are performed to finally obtain a large-size GH4586 alloy ring forging. For example, CN114951530B proposes a method for preparing GH4738 alloy ring forgings with uniform grain size, including: Step 1: Sawing GH4738 bars according to certain blanking specifications and taking samples for γ-phase complete melting temperature test; Step 2: Heating the sawn GH4738 bar billet to a high temperature of 1060-1100℃ in an electric furnace, holding for a time of 6 min / 10 mm (effective thickness of the billet); Step 3: Upsetting and punching the heated and held GH4738 bar billet to form ring billet 1, for a total of 1-2 heating cycles, with a deformation of 30-35% per heating cycle; Step 4: Heating ring billet 1 to a low temperature of 1010-1040℃ in an electric furnace, holding for a time of 6 min / 10 mm (effective thickness of ring billet 1); Step 5: Expanding ring billet 1 using a reaming machine with a lever and a reamer through multiple heating cycles with small deformation to form ring billet 2, for a total of 13-18 heating cycles, with a deformation of 30-35% per heating cycle. The deformation amount is 10-12%; Step 6: Heat the ring billet 2 in an electric furnace to a low temperature of 1010-1040℃, and hold for 6 min / 10 mm of effective thickness of ring billet 2; Step 7: Shape the ring billet 2 into ring billet 3 by multiple small deformations using a special-shaped billet mold and billet making equipment, for a total of 3-6 heating cycles, with a deformation amount of 12-15% per heating cycle; Step 8: Heat the ring billet 3 in an electric furnace to the γ phase dissolution temperature, which is the tertiary γ phase dissolution temperature, at 1040-1050℃, and hold for 6 min / 10 mm of effective thickness of ring billet 3; Step 9: Shape the ring billet 3 into ring billet 4, i.e., forging, by multiple small deformations using a special-shaped ring rolling mold and ring rolling equipment, with a total of 1-3 heating cycles in the special-shaped mold ring rolling forming process, with a deformation amount of 8-10% per heating cycle, and the grain size level of the ring billet 4 is 3-4.

[0004] However, none of the existing technical solutions can completely solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the first aspect of the present invention provides a method for preparing a high-temperature alloy ingot, comprising: The high-temperature alloy ingot is forged to obtain an alloy forging billet; The alloy forging billet is subjected to heat preservation treatment; The alloy forging billet after the heat preservation treatment is then subjected to upsetting. The alloy forging billet after the upsetting process is punched to obtain an alloy billet; the maximum punching pressure of the punching process is determined by the mechanical property parameters of the alloy forging billet and the deformation parameters in the punching process.

[0007] Furthermore, the mechanical property parameters include the deformation resistance of the alloy forging billet; the deformation parameters include at least one of the punching ratio, punching depth, and dimensions of the punched component; the punching ratio refers to the ratio of the cross-sectional areas of the alloy forging billet perpendicular to the axial direction of the pre-drilled hole before and after the punching process, and the punching depth refers to the axial length of the pre-drilled hole; the pre-drilled hole is the hole formed by the punching process.

[0008] Furthermore, the punching component includes a punching needle and an extrusion cylinder, and the dimensions of the punching component include the diameter of the punching needle and the inner diameter of the extrusion cylinder.

[0009] Furthermore, the calculation relationship for the maximum punching pressure is as follows:

[0010] In the formula: The maximum punching pressure; The deformation resistance of the alloy forging billet; d is the punching ratio; d is the diameter of the punching needle; D is the inner diameter of the extrusion cylinder; L is the punching depth.

[0011] Furthermore, the punching ratio ranges from 1.1 to 1.3.

[0012] Furthermore, before punching the alloy forging billet after the upsetting process to obtain the alloy billet, the process includes: preheating the punching needle at a temperature of 150°C to 200°C.

[0013] Furthermore, during the punching process, the punching rate is 40mm / ~80mm / s, where the punching rate refers to the moving speed of the punching needle.

[0014] Furthermore, the forging process transforms at least 80% of the columnar crystal structure of the high-temperature alloy ingot into an equiaxed crystal structure.

[0015] Further, before forging the high-temperature alloy ingot to obtain the alloy forging billet, the process includes: selecting high-temperature alloy raw materials and sequentially performing vacuum induction melting and vacuum consumable remelting to obtain the high-temperature alloy ingot with an O content of less than 20 ppm, an N content of ≤35 ppm and a H content of ≤3 ppm.

[0016] Furthermore, the temperature of the heat preservation treatment is 1155℃~1220℃.

[0017] Furthermore, the heat preservation treatment time in minutes is greater than or equal to twice the radius in millimeters of the alloy forging billet.

[0018] Further, after heat preservation treatment of the alloy forging billet, the process includes: setting a glass powder layer on the surface of the alloy forging billet, the glass powder layer being composed of glass powder with a particle size of 80 mesh to 120 mesh.

[0019] Furthermore, before performing upsetting on the alloy forging billet after the heat preservation treatment, the upsetting die for performing the upsetting treatment is preheated at 150°C to 200°C.

[0020] Furthermore, the high-temperature alloy ingot is a Ni-based wrought high-temperature alloy containing Cr, Co, and Mo.

[0021] To achieve the above objectives, a second aspect of the present invention provides an alloy billet, which is prepared by the billet preparation method of the high-temperature alloy ingot.

[0022] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. The high-temperature alloy ingot preparation method proposed in this invention, by controlling the maximum punching pressure through mechanical property parameters and deformation parameters, can not only ensure the uniformity and stability of the internal structure and grain size of the alloy ingot, but also reduce the risk of needle breakage and cracking of the alloy ingot.

[0023] 2. The high-temperature alloy ingot billet preparation method proposed in this invention firstly involves forging the high-temperature alloy ingot to obtain an alloy forging billet, and then subjecting the alloy forging billet to heat preservation treatment, so that the alloy forging billet can withstand large plastic deformation without cracking during subsequent upsetting and punching processes.

[0024] 3. The alloy billet proposed in this invention is prepared by the billet preparation method of the high-temperature alloy ingot. It has a complete surface, no macroscopic defects, low roughness, and uniform internal grain distribution, and can be used as a qualified hot extrusion billet.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A flowchart of a high-temperature alloy ingot preparation method in one embodiment is provided; Figure 2 A schematic diagram of an alloy billet in one embodiment is shown; Figure 3 A cross-sectional view of an alloy billet in one embodiment is shown; Figure 4 A microscopic image of a high-temperature alloy ingot before forging is shown in one embodiment; Figure 5 A microscopic image of a forged high-temperature alloy ingot is shown in one embodiment; Figure 6 A microscopic image of the alloy billet in one embodiment is shown; Figure 7 Deformation resistance diagrams at different temperatures and punching rates are presented in one embodiment; Figure 8 An appearance drawing of the alloy billet in one embodiment is shown; Figure 9 An appearance drawing of the alloy billet from another embodiment is shown; Figure 10 A microscopic image of the alloy billet from another embodiment is shown. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0029] Example 1

[0030] According to one aspect of the present invention, a method for preparing a high-temperature alloy ingot is provided, such as... Figure 1 As shown, it includes the following steps: S1, the high-temperature alloy ingot is forged to obtain an alloy forging billet.

[0031] Furthermore, before forging the high-temperature alloy ingot to obtain the alloy forging billet, the process includes: selecting high-temperature alloy raw materials and sequentially performing vacuum induction melting and vacuum arc remelting to obtain the high-temperature alloy ingot with an O content of less than 20 ppm, an N content of ≤35 ppm, and a H content of ≤3 ppm, in order to avoid deformation and micro-cracking caused by non-metallic inclusions. In addition, the coarse and fine inclusions of types A, B, C, and D in the high-temperature alloy ingot are all required to be less than or equal to grade 1.5; the requirements for titanium-carbonitride inclusions are based on grade B and grade D non-metallic inclusions, and are all less than or equal to grade 2.5.

[0032] Furthermore, the high-temperature alloy ingot is a Ni-based wrought high-temperature alloy containing Cr, Co, and Mo. For example... Figure 4-5 As shown, the forging process transforms at least 80% of the columnar crystal structure of the high-temperature alloy ingot into an equiaxed crystal structure. Specifically, in this embodiment, the heating temperature of the high-temperature alloy ingot before forging is approximately 1200°C, the final forging temperature is greater than 850°C, and the forging ratio is greater than 4. The forging ratio greater than 4 ensures that the fragmented columnar crystal structure is transformed into an equiaxed crystal structure without the precipitation of coarse, continuous carbides at grain boundaries, and that the high-temperature alloy ingot is free from macroscopic defects such as segregation (e.g., uneven grain size, corrosion pits) and shrinkage cavities.

[0033] S2, heat preservation treatment is performed on the alloy forging billet.

[0034] Further, the temperature of the heat preservation treatment is 1155℃~1220℃. The heat preservation treatment time (in minutes) is greater than or equal to twice the radius (in millimeters) of the alloy forging blank. Specifically, in this embodiment, the heat preservation treatment time (min) ≥ the radius (mm) of the alloy forging blank × 2 (min / mm). Even further, after the heat preservation treatment of the alloy forging blank, the process includes: setting a glass powder layer on the surface of the alloy forging blank, the glass powder layer being composed of glass powder with a particle size of 80 mesh to 120 mesh.

[0035] It should be noted that the lower limit of the heat preservation treatment is set to meet the requirements of reducing the deformation resistance of the alloy forging, ensuring the yield strength of the alloy forging is ≤120MPa, improving the plasticity of the alloy forging, and ensuring the elongation of the alloy forging is ≥70%. The upper limit of the heat preservation treatment is selected to meet the requirements of preventing the alloy forging from overheating, which would lead to grain boundary liquefaction and deformation cracking, and the upper limit of the heat preservation treatment is 100°C below the solidus of the alloy forging.

[0036] Specifically, in this embodiment, after forging, the alloy forging billet is first machined to remove oxide scale, then placed in a heating furnace for heat preservation. After heat preservation, glass powder is coated onto the surface of the alloy forging billet to form a glass powder layer. The main components of the glass powder are... The coating is applied to the surface of the alloy forging blank at a temperature of 1150-1200℃ to reduce friction during subsequent punching and improve deformation capacity. The heat preservation treatment is carried out in three stages, with the heat preservation time for each stage ranging from 1155℃ to 1220℃. The temperature of the first, second, and third heat preservation stages increases sequentially, while the time decreases sequentially.

[0037] S3, the alloy forging billet after the heat preservation treatment is subjected to upsetting treatment.

[0038] Furthermore, before performing upsetting on the alloy forging billet after the heat preservation treatment, the upsetting die for performing the upsetting treatment is preheated at 150°C to 200°C.

[0039] Specifically, in this embodiment, the upsetting die for performing the upsetting process is preheated at 150°C. Closed-loop upsetting is used primarily to ensure that the alloy forging billet does not wobble in the extrusion cylinder during the subsequent punching process, and to ensure that the punching pin is centered on the alloy forging billet, preventing uneven wall thickness. Optionally, the diameter of the upsetting cylinder used for the upsetting process is 800-1100 mm.

[0040] S4, the alloy forging billet after the upsetting process is punched to obtain an alloy billet; the maximum punching pressure of the punching process is determined by the mechanical property parameters of the alloy forging billet and the deformation parameters in the punching process.

[0041] Further, in this embodiment, the mechanical performance parameters include the deformation resistance of the alloy forging billet; the deformation parameters include the punching ratio, punching depth, and the dimensions of the punching component; the punching ratio refers to the ratio of the cross-sectional areas of the alloy forging billet perpendicular to the axial direction of the pre-drilled hole before and after the punching process; the punching depth refers to the axial length of the pre-drilled hole; the pre-drilled hole is the hole formed by the punching process. The punching component includes a punching pin and an extrusion cylinder, and the dimensions of the punching component include the diameter of the punching pin and the inner diameter of the extrusion cylinder. The calculation relationship of the maximum punching pressure is as follows:

[0042] In the formula: The maximum punching pressure; The deformation resistance of the alloy forging billet; d is the punching ratio; d is the diameter of the punching needle; D is the inner diameter of the extrusion cylinder; L is the punching depth.

[0043] It should be noted that, in this embodiment, the dimension of the deformation resistance is MPa; the punching ratio is dimensionless; and the dimensions of the diameter of the punching needle, the inner diameter of the extrusion cylinder, and the punching depth are all length.

[0044] In this embodiment, the punching ratio ranges from 1.1 to 1.3; the punching rate during the punching process is 60 mm / s. Specifically, when the punching rate is low, there is time for heat energy to exchange with the surrounding environment, and the temperature of the alloy forging billet decreases; when the punching rate is high, the generated heat energy cannot be exchanged in time, resulting in a very high temperature of the alloy forging billet, and even overheating; by controlling the punching rate, the temperature of the alloy forging billet can be kept relatively stable, thereby ensuring the uniformity of the alloy forging billet's microstructure.

[0045] In other embodiments, the punching rate may also be 40 mm / s, 50 mm / s, 70 mm / s, and 80 mm / s, etc.

[0046] Optionally, the diameter of the punching pin is 400mm~460mm.

[0047] Furthermore, before punching the alloy forging billet after the upsetting process to obtain the alloy billet, the process includes preheating the punching needle at 150°C to 200°C. Specifically, in this embodiment, the punching needle is preheated at 150°C.

[0048] According to a second aspect of the invention, an alloy billet is provided, such as Figure 2-3 As shown, the alloy billet is prepared by the same method used to prepare the high-temperature alloy ingot. Specifically: First, high-temperature alloy raw materials were selected and subjected to vacuum induction melting and vacuum arc remelting to obtain 4.2 tons of high-temperature alloy ingots. Then, forging was performed to obtain alloy forging billets, with a forging ratio of 5.2. For example... Figure 4-5 As shown, before forging, coarse carbides were present. After forging, the microstructure was equiaxed, and the size of the grain boundary carbides was measured to be <3μm and uniformly distributed. After forging, the alloy forging billet was machined to remove the oxide scale, and the diameter of the alloy forging billet after machining was 780mm. Based on the billet preparation method described in this embodiment, the heat treatment time was calculated to be greater than 780 minutes. Therefore, the specific conditions for heat treatment of the alloy forging billet are as follows: heat treatment at 1170℃ for 24 hours, heat treatment at 1210℃ for 9 hours, and heat treatment at 1220℃ for 2 hours; the total heat treatment time is 35 hours, which is greater than 780 minutes, i.e., the heat treatment time (min) ≥ the radius (mm) of the alloy forging billet × 2 (min / mm).

[0049] Then, according to the blank-making method described in this embodiment, upsetting and punching processes are performed sequentially. For example... Figure 7 The diagram shows the deformation resistance of the alloy forging billet at different temperatures and punching rates. Specifically, in this embodiment, the punching process is carried out at a temperature of 1220°C and a punching rate of 60 mm / s. The deformation resistance of the alloy forging billet is measured to be 75 MPa, the punching ratio is 1.2429, the punching depth is 90 cm, a punching needle with a diameter of 42 cm is used, and an extrusion cylinder with an inner diameter of 95 cm is used. The maximum punching pressure is calculated to be 78289 MPa.

[0050] like Figure 8 As shown, after punching and cooling, machining is performed to obtain the final alloy billet. Its surface is free of visible defects such as broken needles or cracks, and its surface roughness Ra is measured to be ≤ 6.4. Additionally, such as Figure 6 As shown, the grain size of this alloy billet is relatively uniform, and there are no coarse carbide precipitates at the grain boundaries.

[0051] Example 2

[0052] According to one aspect of the present invention, a method for preparing a high-temperature alloy ingot is provided. Specifically, the method for preparing a high-temperature alloy ingot in this embodiment is basically the same as the method for preparing a high-temperature alloy ingot in Embodiment 1, except that the upsetting die for performing the upsetting process and the punching needle for performing the punching process in this embodiment are both preheated at 200°C.

[0053] According to a second aspect of the present invention, an alloy billet is provided, which is prepared by the billet-making method of the high-temperature alloy ingot in Example 2. The preparation steps of this alloy billet are basically the same as those of the alloy billet in Example 1, except that the weight of the high-temperature alloy ingot, the preheating temperature of the punching pin and the upsetting die, the specific conditions for heat preservation treatment of the alloy forging billet, and the maximum punching pressure and its influencing parameters are as follows:

[0054] First, in this embodiment, high-temperature alloy raw materials are selected and subjected to vacuum induction melting and vacuum consumable remelting in sequence to obtain 5.2 tons of high-temperature alloy ingots, which are then forged to obtain alloy forging billets.

[0055] Second, in this embodiment, the specific conditions for heat preservation treatment of the alloy forging billet are as follows: heat preservation treatment at 1155℃ for 4 hours, heat preservation treatment at 1210℃ for 17 hours, and heat preservation treatment at 1220℃ for 2 hours; the total heat preservation time is 23 hours, which is greater than 780 minutes, that is, the heat preservation time (min) satisfies the condition that the heat preservation time (min) is greater than or equal to the radius (mm) of the alloy forging billet × 2 (min / mm).

[0056] Third, in this embodiment, both the upsetting mold for performing the upsetting process and the punching needle for performing the punching process are preheated at 200°C.

[0057] Fourth, in this embodiment, the punching process is carried out at a temperature of 1220°C and a punching rate of 60 mm / s. The deformation resistance of the alloy forging billet is measured to be 75 MPa, the punching ratio is 1.2502, and the punching depth is 95 cm. A punching needle with a diameter of 42.5 cm and an extrusion cylinder with an inner diameter of 95 cm are used. The maximum punching pressure is calculated to be 84680 MPa.

[0058] After punching and cooling, machining is performed to obtain the final alloy billet. In this embodiment, as... Figure 9 As shown, the alloy billet surface has no visible defects such as broken needles or cracks, and its surface roughness Ra is measured to be ≤6.4. Additionally, such as Figure 10 As shown, the grain size of this alloy billet is relatively uniform, and there are no coarse carbide precipitates at the grain boundaries.

[0059] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved: 1. The high-temperature alloy ingot preparation method proposed in this invention, by controlling the maximum punching pressure through mechanical property parameters and deformation parameters, can not only ensure the uniformity and stability of the internal structure and grain size of the alloy ingot, but also reduce the risk of needle breakage and cracking of the alloy ingot.

[0060] 2. The high-temperature alloy ingot billet preparation method proposed in this invention firstly involves forging the high-temperature alloy ingot to obtain an alloy forging billet, and then subjecting the alloy forging billet to heat preservation treatment, so that the alloy forging billet can withstand large plastic deformation without cracking during subsequent upsetting and punching processes.

[0061] 3. The alloy billet proposed in this invention is prepared by the billet preparation method of the high-temperature alloy ingot. It has a complete surface, no macroscopic defects, low roughness, and uniform internal grain distribution, and can be used as a qualified hot extrusion billet.

[0062] The above are merely several specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0064] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A method for preparing a high-temperature alloy ingot, characterized in that, include: The high-temperature alloy ingot is forged to obtain an alloy forging billet; The alloy forging billet is subjected to heat preservation treatment; The alloy forging billet after the heat preservation treatment is then subjected to upsetting. The alloy forging billet after the upsetting process is punched to obtain an alloy billet; the maximum punching pressure of the punching process is determined by the mechanical property parameters of the alloy forging billet and the deformation parameters in the punching process.

2. The method for preparing a high-temperature alloy ingot according to claim 1, characterized in that, The mechanical performance parameters include the deformation resistance of the alloy forging billet; the deformation parameters include at least one of the punching ratio, punching depth, and dimensions of the punched component; the punching ratio refers to the ratio of the cross-sectional areas of the alloy forging billet perpendicular to the axial direction of the pre-drilled hole before and after the punching process; the punching depth refers to the axial length of the pre-drilled hole; the pre-drilled hole is the hole formed by the punching process.

3. The method for preparing a high-temperature alloy ingot according to claim 2, characterized in that, The punching component includes a punching needle and an extrusion cylinder, and the dimensions of the punching component include the diameter of the punching needle and the inner diameter of the extrusion cylinder.

4. The method for preparing a high-temperature alloy ingot according to claim 3, characterized in that, The calculation relationship for the maximum punching pressure is as follows: In the formula: The maximum punching pressure; The deformation resistance of the alloy forging billet; d is the punching ratio; d is the diameter of the punching needle; D is the inner diameter of the extrusion cylinder; L is the punching depth.

5. The method for preparing a high-temperature alloy ingot according to claim 4, characterized in that, The punching ratio ranges from 1.1 to 1.

3.

6. The method for preparing a high-temperature alloy ingot according to claim 3, characterized in that, Before punching the alloy forging billet after the upsetting process to obtain the alloy billet, the following steps are included: The punching needle is preheated at 150℃~200℃.

7. The method for preparing a high-temperature alloy ingot according to claim 6, characterized in that, During the punching process, the punching rate is 40mm / ~80mm / s, where the punching rate refers to the moving speed of the punching needle.

8. The method for preparing a high-temperature alloy ingot according to claim 1, characterized in that, The forging process transforms at least 80% of the columnar crystal structure of the high-temperature alloy ingot into an equiaxed crystal structure.

9. The method for preparing a high-temperature alloy ingot according to claim 1, characterized in that, Before forging the high-temperature alloy ingot to obtain the alloy forging billet, the process includes: High-temperature alloy raw materials are selected and subjected to vacuum induction melting and vacuum consumable remelting in sequence to obtain the high-temperature alloy ingot with an O content of less than 20 ppm, an N content of ≤35 ppm and an H content of ≤3 ppm.

10. The method for preparing a high-temperature alloy ingot according to claim 1, characterized in that, The temperature for the heat preservation treatment is 1155℃~1220℃.

11. The method for preparing a high-temperature alloy ingot according to claim 10, characterized in that, The heat preservation time (in minutes) is greater than or equal to twice the radius (in millimeters) of the alloy forging billet.

12. The method for preparing a high-temperature alloy ingot according to claim 11, characterized in that, After heat preservation treatment, the alloy forging billet includes: A glass powder layer is provided on the surface of the alloy forging billet, the glass powder layer being composed of glass powder with a particle size of 80 mesh to 120 mesh.

13. The method for preparing a high-temperature alloy ingot according to claim 11, characterized in that, Before the alloy forging billet undergoing the heat preservation treatment is upsetting, the following steps are included: The ramming mold for performing the ramming process is preheated at 150℃~200℃.

14. The method for preparing a high-temperature alloy ingot according to any one of claims 1-13, characterized in that, The high-temperature alloy ingot is a Ni-based wrought high-temperature alloy containing Cr, Co and Mo.

15. An alloy billet, characterized in that, The alloy billet is prepared by the billet preparation method of any one of claims 1-14 for high-temperature alloy ingots.

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