Vacuum isothermal forging process and device suitable for high-temperature titanium-based materials

Abstract

The application discloses a vacuum isothermal forging process and device suitable for high-temperature titanium-based materials, relates to the technical field of isothermal forging, and comprises a heating furnace, a male die is connected with a pressure head through high-temperature bolts, and a female die is fixedly connected with a die base through high-temperature bolts; a discharging device is arranged on the lower wall of the heating furnace, so that blank feeding and formed forging taking-out are facilitated; a vacuum pump set and an oxygen meter device matched with the heating furnace can realize monitoring of a vacuum environment and oxygen content in the furnace in the isothermal forging process; the device can guarantee that the whole process from blank and die heating to subsequent forging processes is completely closed, can guarantee the precision and performance of a final formed piece, and has the effects of prolonging the service life of the die and the like. The device can realize almost all heat treatment processes involved in conventional heat treatment and can realize true vacuum isothermal forging.

Description

Technical Field

[0001] This invention relates to the field of isothermal forging technology, and in particular to a vacuum isothermal forging process and apparatus suitable for high-temperature titanium-based materials. Background Technology

[0002] Isothermal forging technology is particularly suitable for difficult-to-deform materials with narrow forging temperature ranges, such as Ti-Al-Sn-Zr-Mo-Si high-temperature titanium alloys for 600℃, near-α high-temperature titanium-based composite materials for 650–750℃, and even more heat-resistant TiAl alloys. This technology is a new process developed based on traditional die forging, where the die and billet are simultaneously heated to the forging temperature, and the billet is deformed within a very narrow temperature range. However, current isothermal forging technologies suffer from several problems, including uneven die heating and insufficiently guaranteed heat preservation.

[0003] Furthermore, existing isothermal forging dies lack vacuum heat treatment equipment. Vacuum heat treatment technology refers to a novel heat treatment technology that combines vacuum technology with heat treatment technology. The vacuum environment in vacuum heat treatment refers to an atmosphere with a pressure below one atmosphere. Compared to conventional heat treatment, vacuum heat treatment technology can simultaneously achieve oxidation-free, decarburization-free, and carburization-free processes. It can remove phosphorus scale from the workpiece surface and has degreasing, degassing, and oxide decomposition effects. It can prevent oxide scale from forming on the billet surface during heat treatment, thus avoiding impacts on the component's precision and performance. Simultaneously, it avoids friction between the oxide scale on the billet surface and the die, significantly reducing repair and replacement costs and extending the die's service life. Vacuum isothermal forging technology is particularly important for the integral forming of large, thin-walled, complex titanium alloy components requiring high precision. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum isothermal forging process and apparatus suitable for high-temperature titanium-based materials, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a vacuum isothermal forging device suitable for high-temperature titanium-based materials, comprising a lower crossbeam, a worktable surface at the top of the lower crossbeam, a mold base at the top of the worktable surface, a heating furnace at the top of the mold base, a furnace door on one side of the heating furnace, and heating elements on the inner wall of the heating furnace; a column is fixedly installed at the top of the lower crossbeam, an upper crossbeam is fixedly installed at the top of the column, and a movable crossbeam is slidably sleeved on the column, the movable crossbeam being disposed on the upper crossbeam. Between the heating furnace and the movable crossbeam; a pressure head is fixedly installed at the bottom end of the movable crossbeam, the bottom end of the pressure head extends into the heating furnace, and the pressure head slides in conjunction with the heating furnace; a punch and a die are provided inside the heating furnace, the punch is detachably installed at the bottom end of the pressure head, and the die is detachably installed on the mold base; a vacuum pump group is installed on the heating furnace, and a power unit is provided between the movable crossbeam and the upper crossbeam, the vacuum pump group is used to evacuate the inside of the heating furnace, and the power unit is used to drive the pressure head to move.

[0006] Preferably, an oxygen analyzer is installed inside the heating furnace to monitor the oxygen content inside the furnace in real time.

[0007] Preferably, the inner wall of the heating furnace is provided with a high-temperature resistant sealing and heat insulation layer.

[0008] Preferably, the mold base is provided with a material unloading device, which is used to demold the blank in the cavity mold.

[0009] Preferably, the heating element is an induction heating coil.

[0010] Preferably, the gas pressure inside the heating furnace is between 10^-1 Pa and 10^-5 Pa.

[0011] Preferably, the heating furnace is equipped with a temperature control unit, which is used to monitor the temperature inside the heating furnace in real time.

[0012] Preferably, the heating furnace is equipped with a vacuum pump switch, a nitrogen pump switch, a heating element switch, a hydraulic oil tank switch, and a display screen on its outer side. The vacuum pump switch is used to control the opening and closing of the vacuum pump assembly, the nitrogen pump switch is used to maintain the pressure value inside the heating furnace, the heating element switch is used to control the opening and closing of the heating element, the hydraulic oil tank switch is used to control the opening and closing of the power unit, and the display screen is used to display the values ​​of gas pressure, oxygen content, and temperature inside the heating furnace.

[0013] A vacuum isothermal forging process for high-temperature titanium-based material disc forgings, employing a vacuum isothermal forging apparatus, specifically includes the following steps:

[0014] S1. Alloy composition: The weight percentages of each component are as follows: 4%–6% Al, 3%–10% Sn, 5%–10% Zr, 0.4%–1.4% Mo, 2%–7% Cr, 0.5%–2% Nb, 0.5%–1% W, 0.1%–0.5% Si, with the balance being Ti. The raw materials are weighed according to the weight percentages of each component. TiB and Y2O3 are used as reinforcing phases. TiB is prepared by in-situ reaction of TiB2 with Ti matrix, and Y2O3 is obtained by external addition of nano-sized particles. The total integral of TiB and Y2O3 is 0–10% (vol.%), and the volume ratio of the two is 1:1–5:1.

[0015] S2, Melting and Casting Ingots: The components weighed in S1 are added to a vacuum induction furnace for melting. After all the components have melted, the furnace is kept at a temperature of 5 to 10 minutes. Then, the ingots are cast at a medium temperature of 50 to 80°C above the liquidus point.

[0016] S3, roughing and isothermal multi-directional forging:

[0017] S3.1 Cut the ingot obtained in S2 to obtain a cubic ingot of 70×70×140mm, and perform billet forging at 50-100℃ above the β transformation temperature, with a deformation of 50%.

[0018] S3.2, then quickly lower the furnace temperature to (T) β -10)℃~(T β The quasi-β forging was carried out at +20℃ and held for 20-30 minutes. Then, high strain rate deformation was carried out along one of the 70mm directions, with a deformation amount of 30%, and held for 20-30 minutes.

[0019] S3.3. The temperature is lowered to 30-50℃ below the phase transformation point for two-phase forging. An isothermal multi-directional forging process is adopted. The deformation amount of each forging is 35%. The holding time after each forging is 20-30 minutes. Two passes of isothermal multi-directional forging are performed. The resulting billet is cooled to room temperature with the furnace.

[0020] S4. Bladed disk forging:

[0021] S4.1 Clean the billet obtained in S3, remove the oxide scale on the surface of the billet, and obtain a cylindrical billet with a diameter and height of Φ120mm×60mm by cutting;

[0022] S4.2. Fix the heating furnace directly onto the press and connect the vacuum pump unit and heating circuit;

[0023] S4.3 Connect the punch to the pressure head using high-temperature bolts, and fix the die to the lower die base using high-temperature bolts;

[0024] S4.4 Place the Φ120mm×60mm billet into the cavity mold and close the furnace door tightly;

[0025] S4.5 Start the vacuum pump unit to create a negative pressure environment of 10^-1 Pa to 10^-5 Pa inside the heating furnace;

[0026] S4.6 Turn on the heating element of the heating furnace and heat the punch, die and billet to a forging temperature of 600℃~1100℃ according to the forging process requirements. The display screen can monitor the gas pressure, oxygen content and temperature in the heating furnace in real time. Then control the heating power of the heating element to keep the temperature of the punch, die and billet constant at 600℃~1100℃.

[0027] S4.7 After holding at the temperature for a certain period of time, the pressure head moves down to drive the punch to carry out the heat treatment process, and completes the forming process of the bladed disk; after the bladed disk is formed, it is held at the temperature for 50 to 100 minutes and then subjected to solution aging treatment.

[0028] Preferably, in S2, each component is melted in a vacuum induction furnace 2 to 3 times.

[0029] Preferably, in S3, the obtained titanium-based composite material has a phase composition with equiaxed α-Ti as the matrix, and solidified TiB and Y2O3 uniformly distributed in the matrix. The TiB phase is micron-sized with a size of 150μm to 300μm, and the Y2O3 is nano-sized with a size of 50nm to 200nm.

[0030] The present invention discloses the following technical effects:

[0031] The vacuum isothermal forging apparatus provided by this invention includes a heating furnace, a punch connected to a pressure head via high-temperature bolts, and a die fixedly connected to a mold base via high-temperature bolts. A discharge device is provided on the lower wall of the heating furnace to facilitate the loading of billets and the removal of formed forgings. The heating furnace is equipped with a vacuum pump group and an oxygen analyzer, enabling monitoring of the vacuum environment and oxygen content within the furnace during the isothermal forging process. This apparatus ensures a completely enclosed process from billet and mold heating to subsequent forging steps, guaranteeing the precision and performance of the final formed parts and extending the service life of the molds. It can perform almost all heat treatment processes involved in conventional heat treatment, achieving true vacuum isothermal forging. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the vacuum isothermal forging apparatus of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the die of the present invention;

[0035] Figure 3 A schematic diagram of the structure of the bladed disk manufactured using the vacuum isothermal forging apparatus of the present invention;

[0036] The components include: 1. Upper crossbeam; 2. Movable crossbeam; 3. Press head; 4. Punch; 5. High-temperature resistant sealing and heat insulation layer; 6. Heating element; 7. Column; 8. Mold base; 9. Worktable; 10. Lower beam; 11. Die; 12. Unloading device; 13. Billet; 14. Vacuum pump switch; 15. Nitrogen pump switch; 16. Heating element switch; 17. Hydraulic press oil tank switch; 18. Display screen. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] This invention provides a vacuum isothermal forging apparatus suitable for high-temperature titanium-based materials, comprising a lower crossbeam, a worktable 9 at the top of the lower crossbeam, a mold base 8 at the top of the worktable 9, a heating furnace at the top of the mold base 8, a furnace door on one side of the heating furnace, and heating elements 6 on the inner wall of the heating furnace; a column 7 is fixedly installed at the top of the lower crossbeam, an upper crossbeam 1 is fixedly installed at the top of the column 7, a movable crossbeam 2 is slidably mounted on the column 7, and the movable crossbeam 2 is located between the upper crossbeam 1 and the heating furnace; a pressure head 3 is fixedly installed at the bottom of the movable crossbeam 2, the bottom end of the pressure head 3 extends into the heating furnace, and the pressure head 3 slides in conjunction with the heating furnace; a punch 4 and a die 11 are provided inside the heating furnace, the punch 4 is detachably installed at the bottom end of the pressure head 3, and the die 11 is detachably installed on the mold base 8; a vacuum pump group is installed on the heating furnace, and a power unit is provided between the movable crossbeam 2 and the upper crossbeam 1. The vacuum pump group is used to evacuate the inside of the heating furnace, and the power unit is used to drive the pressure head 3 to move.

[0040] Furthermore, an oxygen analyzer is installed inside the heating furnace to monitor the oxygen content inside the furnace in real time.

[0041] Furthermore, the inner wall of the heating furnace is provided with a high-temperature resistant sealing and heat insulation layer 5, which is made of high-temperature resistant sealant.

[0042] Furthermore, a material unloading device 12 is provided inside the mold base 8, which is used to demold the blank 13 inside the die 11.

[0043] Furthermore, the heating element 6 is an induction heating coil.

[0044] Furthermore, the gas pressure inside the heating furnace is set to 10^-3 Pa.

[0045] Furthermore, a temperature control unit is installed inside the heating furnace to monitor the temperature inside the furnace in real time.

[0046] Furthermore, the heating furnace is equipped with a vacuum pump switch 14, a nitrogen pump switch 15, a heating element switch 16, a hydraulic oil tank switch 17, and a display screen 18. The vacuum pump switch 14 is used to control the opening and closing of the vacuum pump group, the nitrogen pump switch 15 is used to maintain the pressure value inside the heating furnace, the heating element switch 16 is used to control the opening and closing of the heating element 6, the hydraulic oil tank switch 17 is used to control the opening and closing of the power unit, and the display screen 18 is used to display the values ​​of gas pressure, oxygen content, and temperature inside the heating furnace.

[0047] A vacuum isothermal forging process for high-temperature titanium-based material disc forgings, employing a vacuum isothermal forging apparatus, specifically includes the following steps:

[0048] S1. Alloy composition: The weight percentages of each component are as follows: 5% Al, 6% Sn, 6% Zr, 0.8% Mo, 4.5% Cr, 1.2% Nb, 0.75% W, 0.2% Si, with the balance being Ti. This composite material uses TiB and Y2O3 as reinforcing phases. TiB is prepared by the in-situ reaction of TiB2 with a Ti matrix, while Y2O3 is obtained through an external addition method using nanoscale particles. In this embodiment, the total integral of TiB and Y2O3 is 6% (vol.%), with a volume ratio of 3:1.

[0049] Sponge titanium, high-purity aluminum, sponge zirconium, high-purity tin ingots, master alloys such as Al-Mo alloy, Al-Nb alloy, Al-W alloy and pure Si powder are used as raw materials, and the raw materials are weighed according to the weight percentage of each component.

[0050] S2, Melting and Casting Ingots: The components weighed in S1 are added to a vacuum induction furnace for melting. After all the components have melted, the furnace is kept at a constant temperature for 6 minutes. Then, the ingots are cast at a medium temperature of 70°C above the liquidus point to obtain the ingots.

[0051] S3, roughing and isothermal multi-directional forging:

[0052] S3.1 Cut the ingot obtained in S2 to obtain a cubic ingot of 70×70×140mm, and perform forging at 80℃ above the β transformation temperature, with a deformation of 50%.

[0053] S3.2, then quickly lower the furnace temperature to (T) β -10)℃~(T β The quasi-β forging was carried out at +20℃ and held for 30 min. Then, high strain rate deformation was carried out along one of the 70 mm directions, with a deformation amount of 30%, and held for 30 min.

[0054] S3.3. The temperature is lowered to 40°C below the phase transformation point for two-phase forging. An isothermal multi-directional forging process is adopted. The deformation amount of each forging is 35%. The holding time after each forging is 30 minutes. Two passes of isothermal multi-directional forging are carried out. The resulting billet 13 is cooled to room temperature with the furnace.

[0055] S4. Bladed disk forging:

[0056] S4.1 Clean the blank 13 obtained in S3, remove the oxide scale on the surface of the blank 13, and obtain a cylindrical blank 13 with a diameter and height of Φ120mm×60mm by cutting.

[0057] S4.2. Fix the heating furnace directly onto the press and connect the vacuum pump unit and heating circuit;

[0058] S4.3 Connect the punch 4 to the pressure head 3 with high-temperature bolts, and fix the die 11 to the lower die base with high-temperature bolts;

[0059] S4.4 Place the Φ120mm×60mm billet 13 into the cavity mold 11 and close the furnace door tightly;

[0060] S4.5 Start the vacuum pump unit to create a negative pressure environment of 10^-3 Pa inside the heating furnace;

[0061] S4.6 Turn on the heating element 6 of the heating furnace and heat the punch 4, die 11 and billet 13 to a forging temperature of 960°C according to the forging process requirements. The display screen 18 can monitor the gas pressure, oxygen content and temperature in the heating furnace in real time. Then control the heating power of the heating element 6 to keep the temperature of the punch 4, die 11 and billet 13 at a constant temperature of 960°C.

[0062] S4.7 After holding at heat for 30 minutes, the pressure head 3 moves down to drive the punch 4 to carry out the heat treatment process, completing the forming process of the bladed disk; after the bladed disk is formed, it is held at heat for 100 minutes and then subjected to solution aging treatment.

[0063] Furthermore, in S2, each component is melted twice in a vacuum induction furnace.

[0064] Furthermore, in S3, the obtained titanium-based composite material has a phase composition with equiaxed α-Ti as the matrix, and solidified TiB and Y2O3 uniformly distributed in the matrix. The TiB phase mainly exhibits a whisker morphology, and the Y2O3 is a near-equiaxed particle. The TiB phase is micron-sized with an average length of 200 μm, and the Y2O3 is nano-sized with an average size of 62.4 nm.

[0065] This invention, by directly placing the heating furnace on the press, avoids the contact between the preheated or heat-preserved billet 13 and air during the previous process of removing the billet 13 from the heating furnace and transporting it to the die 11, which led to oxidation of the billet 13 and significant heat loss, thus affecting the precision and performance of the final molded part. Furthermore, the heating furnace of this invention is equipped with a vacuum pump group to achieve an internal pressure between 10^-1 and 10^-5 Pa, and is equipped with an oxygen analyzer for real-time monitoring of the oxygen content inside the furnace. This invention can implement almost all heat treatment processes involved in conventional heat treatment, and the quality of heat treatment is greatly improved. It also avoids friction between the oxide scale on the surface of the billet 13 and the die, extending the service life of the die and reducing operating costs such as repair and replacement expenses.

[0066] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A vacuum isothermal forging process for high-temperature titanium-based material disc-shaped forgings, characterized in that, Specifically, the following steps are included: S1. Alloy composition: The weight percentages of each component are as follows: 4%–6% Al, 3%–10% Sn, 5%–10% Zr, 0.4%–1.4% Mo, 2%–7% Cr, 0.5%–2% Nb, 0.5%–1% W, 0.1%–0.5% Si, with the balance being Ti. Raw materials are weighed according to the weight percentages of each component. TiB and Y2O3 are used as reinforcing phases. TiB is prepared by in-situ reaction of TiB2 with Ti matrix, and Y2O3 is obtained by external addition of nano-sized particles. The total integral of TiB and Y2O3 is 0–10% (vol.%), and the volume fraction ratio of the two is 1:1–5:

1. S2, Melting and Casting Ingots: The components weighed in S1 are added to a vacuum induction furnace for melting. After all the components have melted, the furnace is kept at a temperature of 5 to 10 minutes. Then, the ingots are cast at a medium temperature of 50 to 80°C above the liquidus point. S3, roughing and isothermal multi-directional forging: S3.1 Cut the ingot obtained in S2 to obtain a rectangular ingot of 70×70×140mm, and perform rough forging at 50-100℃ above the β transformation temperature, with a deformation of 50%; S3.2 Next, quickly lower the furnace temperature to (Tβ-10)℃~(Tβ+20)℃ for quasi-β forging, hold for 20~30min, and perform high strain rate deformation along one of the 70mm directions, with a deformation amount of 30%, and hold for 20~30min. S3.

3. The temperature is lowered to 30-50℃ below the phase transformation point for two-phase forging. The isothermal multi-directional forging process is adopted. The deformation amount of each forging is 35%. The holding time after each forging is 20-30 minutes. Two passes of isothermal multi-directional forging are carried out. The resulting billet (13) is cooled to room temperature with the furnace. S4. Bladed disk forging: S4.1 Clean the blank (13) obtained in S3, remove the oxide scale on the surface of the blank (13), and obtain a cylindrical blank (13) with a diameter and height of Φ120mm×60mm by cutting. S4.

2. Fix the heating furnace directly onto the press and connect the vacuum pump unit and heating circuit; S4.3 Connect the punch (4) to the pressure head (3) with high-temperature bolts, and connect the die (11) to the mold base (8) with high-temperature bolts; S4.4 Place the Φ120mm×60mm billet (13) into the cavity mold (11) and close the furnace door; S4.

5. Start the vacuum pump unit to evacuate the interior of the heating furnace to 10°C. -1 pa~10 -5 The negative pressure environment of PA; S4.

6. Turn on the heating element (6) of the heating furnace and heat the punch (4), die (11) and billet (13) to a forging temperature of 600℃~1100℃ according to the forging process requirements. The air pressure, oxygen content and temperature in the heating furnace are monitored in real time through the display screen (18). Then, control the heating power of the heating element (6) to keep the temperature of the punch (4), die (11) and billet (13) constant at 600℃~1100℃. S4.7 After heat preservation for a certain period of time, the pressure head (3) moves down to drive the punch (4) to carry out heat treatment process to complete the forming process of the bladed disk; after the bladed disk is formed, it is kept at heat for 50 to 100 minutes and then subjected to solution aging treatment.

2. The vacuum isothermal forging process for high-temperature titanium-based material disc forgings according to claim 1, characterized in that, In S2, each component is melted 2 to 3 times in a vacuum induction furnace.

3. The vacuum isothermal forging process for high-temperature titanium-based material disc forgings according to claim 1, characterized in that, The vacuum isothermal forging device used in this vacuum isothermal forging process includes a lower crossbeam, a worktable (9) at the top of the lower crossbeam, a mold base (8) at the top of the worktable (9), a heating furnace at the top of the mold base (8), a furnace door on one side of the heating furnace, and heating elements (6) on the inner wall of the heating furnace; a column (7) is fixedly installed at the top of the lower crossbeam, an upper crossbeam (1) is fixedly installed at the top of the column (7), and a movable crossbeam (2) is slidably fitted on the column (7). The upper crossbeam (1) is placed between the upper crossbeam (1) and the heating furnace; a pressure head (3) is fixedly installed at the bottom end of the movable crossbeam (2), the bottom end of the pressure head (3) extends into the heating furnace, and the pressure head (3) slides with the heating furnace; a punch (4) and a die (11) are provided inside the heating furnace; a vacuum pump group is installed on the heating furnace, and a power device is provided between the movable crossbeam (2) and the upper crossbeam (1); the vacuum pump group is used to evacuate the inside of the heating furnace, and the power device is used to drive the pressure head (3) to move; The heating furnace is equipped with a vacuum pump switch (14), a nitrogen pump switch (15), a heating element switch (16), a hydraulic oil tank switch (17), and a display screen (18). The vacuum pump switch (14) is used to control the opening and closing of the vacuum pump group. The nitrogen pump switch (15) is used to maintain the pressure value inside the heating furnace. The heating element switch (16) is used to control the opening and closing of the heating element (6). The hydraulic oil tank switch (17) is used to control the opening and closing of the power unit. The display screen (18) is used to display the values ​​of gas pressure, oxygen content, and temperature inside the heating furnace.

4. The vacuum isothermal forging process for high-temperature titanium-based material disc forgings according to claim 3, characterized in that, An oxygen analyzer is installed inside the heating furnace to monitor the oxygen content inside the furnace in real time.

5. The vacuum isothermal forging process for high-temperature titanium-based material disc forgings according to claim 3, characterized in that, The inner wall of the heating furnace is provided with a high-temperature resistant sealing and heat insulation layer (5).

6. The vacuum isothermal forging process for high-temperature titanium-based material disc forgings according to claim 3, characterized in that, The mold base (8) is provided with a material unloading device (12), which is used to demold the blank (13) in the cavity mold (11).

7. The vacuum isothermal forging process for high-temperature titanium-based material disc forgings according to claim 3, characterized in that, The heating element (6) is an induction heating coil.

8. The vacuum isothermal forging process for high-temperature titanium-based material disc forgings according to claim 3, characterized in that, The heating furnace is equipped with a temperature control unit, which is used to monitor the temperature inside the heating furnace in real time.

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