An apparatus and process for sintering titanium alloys based on graphite vacuum sintering furnace

Abstract

The application relates to an equipment and process for sintering a titanium alloy based on a graphite vacuum sintering furnace, which comprises a furnace body, a graphite box arranged in the furnace body, a vacuum pumping device communicated with the graphite box, a heating device comprising a water-cooled medium-frequency induction coil assembly, a heat-conducting insulation assembly and an auxiliary temperature control assembly, the heat-conducting insulation assembly being connected with the water-cooled medium-frequency induction coil assembly and the auxiliary temperature control assembly and being arranged in heat conduction and insulation between the water-cooled medium-frequency induction coil assembly and the auxiliary temperature control assembly, the water-cooled medium-frequency induction coil assembly being arranged outside the graphite box and used for heating the graphite box, and the auxiliary temperature control assembly being used for heat exchange with the water-cooled medium-frequency induction coil assembly when the water-cooled medium-frequency induction coil assembly heats the graphite box, so as to assist in adjusting the temperature rise of the graphite box when the water-cooled medium-frequency induction coil assembly heats the graphite box. The application can make the adjustment process quickly respond in place and shorten the response time, and can also guarantee the adjustment accuracy in place and the precision of the adjustment process.

Description

Technical Field

[0001] This application relates to the field of titanium alloy sintering technology, and in particular to an equipment and process for sintering titanium alloys based on a graphite vacuum sintering furnace. Background Technology

[0002] Titanium alloy parts can be sintered in a vacuum environment using a sintering furnace, with molybdenum wire furnaces being a common type. However, sintering titanium alloy parts using molybdenum wire furnaces is relatively expensive. Therefore, while ensuring that the titanium alloy parts are not easily contaminated by carbon or permeated by oxygen, existing technologies also use graphite furnaces for sintering. Protective measures include, but are not limited to, applying protective coatings, such as zirconium oxide layers. However, the heating devices in existing graphite vacuum sintering furnaces are insufficient to meet the stringent temperature control requirements of titanium alloy parts during the sintering process. Summary of the Invention

[0003] To address the problem of accurate temperature control in the heating devices of existing graphite vacuum sintering furnaces, this application provides an equipment and process for sintering titanium alloys using a graphite vacuum sintering furnace.

[0004] In a first aspect, this application provides an apparatus for sintering titanium alloys using a graphite vacuum sintering furnace, the apparatus comprising:

[0005] A furnace body, wherein a graphite box is provided inside the furnace body, the graphite box being used for sintering titanium alloy parts in a vacuum environment;

[0006] A vacuum pumping device, which is connected to the graphite box and is used to create a vacuum environment inside the graphite box;

[0007] A heating device is disposed inside the furnace body. The heating device includes a water-cooled intermediate-frequency induction coil assembly, a thermally conductive and insulating assembly, and an auxiliary temperature control assembly. The thermally conductive and insulating assembly connects the water-cooled intermediate-frequency induction coil assembly and the auxiliary temperature control assembly and is configured to conduct heat and provide insulation between the water-cooled intermediate-frequency induction coil assembly and the auxiliary temperature control assembly. The water-cooled intermediate-frequency induction coil assembly is arranged outside the graphite box and is used to heat the graphite box. The auxiliary temperature control assembly is used to exchange heat with the water-cooled intermediate-frequency induction coil assembly when the graphite box is heated, so as to assist in regulating the temperature rise of the graphite box when the water-cooled intermediate-frequency induction coil assembly heats the graphite box. The temperature rise of the graphite box includes a first temperature rise in a first temperature range and a second temperature rise in a second temperature range. The first temperature range is smaller than the second temperature range, and the first temperature rise is greater than the second temperature rise.

[0008] Optionally, the thermally conductive insulation component includes a fixing post and a limiting sleeve. The fixing post is disposed on the outside of the water-cooled intermediate frequency induction coil component, the limiting sleeve is disposed on the fixing post, and the auxiliary temperature control component is connected to the limiting sleeve.

[0009] Optionally, the limiting sleeve is provided with a limiting slot, and the auxiliary temperature control component is wound around the limiting sleeve and arranged in the limiting slot.

[0010] Optionally, the water-cooled intermediate frequency induction coil assembly includes a first water-cooling tube, and the auxiliary temperature control assembly includes a second water-cooling tube, both of which are made of oxygen-free copper material.

[0011] Optionally, the first water-cooling pipe has a square cross-section, the fixing post is threaded onto a plane of the first water-cooling pipe, the second water-cooling pipe has a circular cross-section, and the shape of the limiting groove is adapted to the second water-cooling pipe.

[0012] Optionally, both the fixing post and the limiting sleeve are made of ceramic material.

[0013] Optionally, the water-cooled intermediate frequency induction coil assembly is arranged in a spiral outside the graphite box, and the thermally conductive insulation components are arranged in several groups along the extension direction of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly. The several groups of thermally conductive insulation components are arranged on two turns of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly, and the auxiliary temperature control component is arranged in an "S" shape between the several groups of thermally conductive insulation components on two turns of the water-cooled intermediate frequency induction coil assembly.

[0014] Optionally, the auxiliary temperature control components are arranged in several groups along the axial direction of the water-cooled intermediate frequency induction coil assembly.

[0015] Optionally, the device further includes a heat preservation device, which is disposed inside the furnace and outside the heating device and the graphite box, and is used to keep the heating device and the graphite box warm.

[0016] Secondly, this application provides a process for sintering titanium alloys using a graphite vacuum sintering furnace, wherein the process uses any of the equipment provided in this application for sintering titanium alloys using a graphite vacuum sintering furnace to sinter titanium alloy components.

[0017] This application configures the heating device as at least a water-cooled intermediate-frequency induction coil assembly, a thermally conductive insulation assembly, and an auxiliary temperature control assembly. The auxiliary temperature control assembly exchanges heat with the water-cooled intermediate-frequency induction coil assembly when heating the graphite box, thereby assisting in regulating the temperature rise of the graphite box during heating. This allows the temperature inside the graphite box to rise from a first temperature range to a second temperature range, and for the first temperature rise in the first temperature range to decrease to a second temperature rise in the second temperature range, resulting in a rapid and timely adjustment process and shortening the response time. At the same time, it ensures accurate and precise adjustment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a device for sintering titanium alloys based on a graphite vacuum sintering furnace, provided in one embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the heating device of an equipment for sintering titanium alloys based on a graphite vacuum sintering furnace, according to an embodiment of this application.

[0020] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0021] Explanation of reference numerals in the attached drawings: 100, furnace body; 110, frame; 120, furnace cover; 200, graphite box; 210, box cover; 300, vacuum device; 400, heating device; 410, water-cooled intermediate frequency induction coil assembly; 411, first water-cooling pipe; 420, thermally conductive and insulating assembly; 421, fixing column; 422, limiting sleeve; 4221, limiting slot; 430, auxiliary temperature control assembly; 431, second water-cooling pipe; 500, heat preservation device; 510, heat preservation cover; 600, telescopic drive device. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0023] As described in the background section, when sintering titanium alloy parts in a graphite vacuum sintering furnace, the process of heating to the sintering temperature can be set as a multi-stage heating curve. For example, when the temperature is below 1600℃, the heating rate can be 20℃ / min; while when the temperature is above 1600℃, the heating rate can be 5℃ / min. This setting can avoid uneven thermal expansion of the titanium alloy parts or damage to the graphite vacuum sintering furnace caused by excessively rapid heating. However, the control of the heating rate of the graphite vacuum sintering furnace depends on the cooling structure of its heating device. The existing cooling structures of the heating devices of graphite vacuum sintering furnaces usually adopt air cooling or water cooling. For the existing air cooling structure, the adjustment process of the cooling rate is relatively slow, and the response time is long; while for the existing water cooling structure, although the adjustment process of the cooling rate is relatively fast, the adjustment accuracy is relatively poor, and it is difficult to accurately adjust to the desired position. That is, the existing heating devices of graphite vacuum sintering furnaces cannot meet the strict temperature control requirements of titanium alloy parts during the sintering process.

[0024] Based on this, one embodiment of this application provides an apparatus for sintering titanium alloys using a graphite vacuum sintering furnace, the apparatus comprising:

[0025] Furnace body 100, graphite box 200 is installed inside furnace body 100, graphite box 200 is used to sinter titanium alloy parts in a vacuum environment;

[0026] A vacuum pumping device 300 is connected to a graphite box 200 and is used to create a vacuum environment inside the graphite box 200.

[0027] A heating device 400 is disposed inside the furnace body 100. The heating device 400 includes a water-cooled intermediate frequency induction coil assembly 410, a thermally conductive and insulating assembly 420, and an auxiliary temperature control assembly 430. The thermally conductive and insulating assembly 420 connects the water-cooled intermediate frequency induction coil assembly 410 and the auxiliary temperature control assembly 430 and is configured to conduct heat and provide insulation between the water-cooled intermediate frequency induction coil assembly 410 and the auxiliary temperature control assembly 430. The water-cooled intermediate frequency induction coil assembly 410 is arranged outside the graphite box 200 and is used to heat the graphite box 200. The auxiliary temperature control assembly 430 is used to exchange heat with the water-cooled intermediate frequency induction coil assembly 410 when the water-cooled intermediate frequency induction coil assembly 410 heats the graphite box 200, so as to assist in adjusting the temperature rise of the graphite box 200 when the water-cooled intermediate frequency induction coil assembly 410 heats the graphite box 200. The temperature rise of the graphite box 200 includes a first temperature rise in a first temperature range and a second temperature rise in a second temperature range. The first temperature range is smaller than the second temperature range, and the first temperature rise is greater than the second temperature rise.

[0028] like Figure 1As shown in this embodiment, the device may include a furnace body 100, which may be cylindrical and horizontally mounted on a frame 110. At least one end of the furnace body 100 may be provided with an openable furnace cover 120, and by controlling the opening and closing of the furnace cover 120, the titanium alloy parts to be sintered can be arranged in the furnace body 100.

[0029] like Figure 1 As shown, a graphite box 200 can be installed inside the furnace body 100. The titanium alloy parts to be sintered can be arranged inside the graphite box 200. The graphite box 200 can be equipped with a support structure for placing the titanium alloy parts, such as a support column or a sintering platform. The graphite box 200 can also be configured as a cylindrical structure, with at least one end configured as an openable lid 210. When sintering the titanium alloy parts, a vacuum environment is formed inside the graphite box 200.

[0030] like Figure 1 As shown, the device may also include a vacuum pumping device 300, which is used to create a vacuum environment inside the graphite box 200 so as to perform high-temperature sintering of the titanium alloy parts inside the graphite box 200.

[0031] like Figure 1 and Figure 2As shown, during high-temperature sintering of titanium alloy parts, a heating device 400 can be used to heat the graphite box 200 and the titanium alloy parts arranged within it. The heating device 400 can be located inside the furnace body 100 and may include a water-cooled intermediate-frequency induction coil assembly 410, a thermally conductive and insulating assembly 420, and an auxiliary temperature control assembly 430. The water-cooled intermediate-frequency induction coil assembly 410 can be arranged outside the graphite box 200 and can generate eddy currents through an alternating magnetic field based on the principle of electromagnetic induction, converting these currents into heat energy to heat the graphite box 200 and the titanium alloy parts arranged within it. During the heating process, the water-cooled intermediate-frequency induction coil assembly 410 can also control its heating temperature within a certain range through water cooling, ensuring that the heating rate of the sintered titanium alloy parts meets the requirements. The auxiliary temperature control component 430 can be disposed outside the water-cooled intermediate frequency induction coil assembly 410. It can be connected to the water-cooled intermediate frequency induction coil assembly 410 through a thermally conductive insulation component 420. The thermally conductive insulation component 420 can provide both thermal conductivity and insulation between the auxiliary temperature control component and the water-cooled intermediate frequency induction coil assembly 410. Under the thermal conductivity of the thermally conductive insulation component 420, the auxiliary temperature control component 430 can exchange heat with the water-cooled intermediate frequency induction coil assembly 410 when heating the graphite box 200, thereby assisting in regulating the temperature rise of the graphite box 200 when heated by the water-cooled intermediate frequency induction coil assembly 410. The temperature rise of the graphite box 200 can include a first temperature rise within a first temperature range and a second temperature rise within a second temperature range, wherein the first temperature range can be smaller than the second temperature range, and the first temperature rise can be greater than the second temperature rise.

[0032] In this embodiment, for example, the first temperature range can be below 1600℃, and the first temperature rise can be 20℃ / min. When the temperature inside the graphite box 200 is below 1600℃, the water-cooled intermediate frequency induction coil assembly 410 can control its heating temperature through its own water cooling effect when heating the graphite box 200. However, the effect of temperature control solely through the water cooling effect of the water-cooled intermediate frequency induction coil assembly 410 is relatively limited, and it is easy for the heating temperature of the water-cooled intermediate frequency induction coil assembly 410 to become too high. When the heating temperature of the water-cooled intermediate frequency induction coil assembly 410 is too high, the heating rate inside the graphite box 200 increases beyond 20℃ / min. At this time, the auxiliary temperature control assembly 430 can operate, exchanging heat with the water-cooled intermediate frequency induction coil assembly 410 to remove some of its heat, thus lowering the heating temperature of the graphite box 200 by the water-cooled intermediate frequency induction coil assembly 410. Furthermore, after adjustment by the auxiliary temperature control assembly 430, if the heating rate inside the graphite box 200 decreases significantly beyond 20℃ / min when the heating temperature of the water-cooled intermediate frequency induction coil assembly 410 decreases, the auxiliary temperature control assembly 430 can reduce its heat exchange with the water-cooled intermediate frequency induction coil assembly 410 to maintain the heating temperature of the graphite box 200 by the water-cooled intermediate frequency induction coil assembly 410, thereby accurately controlling the heating rate at 20℃ / min. The second temperature range can be above 1600℃, and the second temperature rise can be 5℃ / min. When the temperature of the graphite box 200 is above 1600℃ and the heating rate is 5℃ / min, the adjustment function of the auxiliary temperature control component 430 is the same.

[0033] When the temperature inside the graphite box 200 increases from below 1600℃ to above 1600℃, and the heating rate inside the graphite box 200 decreases from approximately 20℃ / min to approximately 5℃ / min, the water-cooled intermediate frequency induction coil assembly 410 can reduce its heating temperature on the graphite box 200. Simultaneously, the auxiliary temperature control assembly 430 can increase its heat exchange with the water-cooled intermediate frequency induction coil assembly 410, further accelerating the reduction of the heating temperature of the graphite box 200 by the water-cooled intermediate frequency induction coil assembly 410, thus shortening the response time of the adjustment process. After adjustment, the auxiliary temperature control assembly 430 can reduce its heat exchange with the water-cooled intermediate frequency induction coil assembly 410, keeping the heating temperature of the graphite box 200 by the water-cooled intermediate frequency induction coil assembly 410 constant, achieving accurate adjustment and ensuring the precision of the adjustment process.

[0034] It is understood that this application, by configuring the heating device 400 with at least a water-cooled intermediate frequency induction coil assembly 410, a thermally conductive insulation assembly 420, and an auxiliary temperature control assembly 430, and by having the auxiliary temperature control assembly 430 exchange heat with the water-cooled intermediate frequency induction coil assembly 410 when heating the graphite box 200, can assist in regulating the temperature rise of the graphite box 200 when the water-cooled intermediate frequency induction coil assembly 410 heats it. This allows the temperature inside the graphite box 200 to rise from the first temperature range to the second temperature range, and for the first temperature rise in the first temperature range to decrease to the second temperature rise in the second temperature range, thus enabling the adjustment process to respond quickly and effectively, shortening the response time; at the same time, it can ensure accurate and precise adjustment, guaranteeing the accuracy of the adjustment process.

[0035] Specifically, the thermally conductive insulation component 420 includes a fixing post 421 and a limiting sleeve 422. The fixing post 421 is disposed on the outside of the water-cooled intermediate frequency induction coil component 410, and the limiting sleeve 422 is disposed on the fixing post 421. The auxiliary temperature control component 430 is connected to the limiting sleeve 422.

[0036] like Figure 2 and Figure 3 As shown in this embodiment, the thermally conductive insulating component 420 may include a fixing post 421 and a limiting sleeve 422. The fixing post 421 may be cylindrical and disposed on the outside of the water-cooled intermediate frequency induction coil assembly 410. The limiting sleeve 422 may be a circular sleeve that fits onto the fixing post 421 and can be axially positioned by components such as retaining rings and pins. The auxiliary temperature control component 430 may be connected to the limiting sleeve 422, and the auxiliary temperature control component 430 and the water-cooled intermediate frequency induction coil assembly 410 are spaced apart. The distance between the auxiliary temperature control component 430 and the water-cooled intermediate frequency induction coil assembly 410 is preferably a distance to avoid arcing between them.

[0037] It is understood that in this embodiment, by setting the thermally conductive insulation component 420 at least as a fixed post 421 and a limiting sleeve 422, it is convenient to connect the auxiliary temperature control component 430 to the water-cooled intermediate frequency induction coil component 410 through the thermally conductive insulation component 420.

[0038] More specifically, the limiting sleeve 422 is provided with a limiting slot 4221, and the auxiliary temperature control component 430 is wound around the limiting sleeve 422 and arranged in the limiting slot 4221.

[0039] like Figure 2 and Figure 3As shown in this embodiment, by way of example, the radial outer side of the limiting sleeve 422 can be configured as a limiting groove 4221, and the limiting groove 4221 can be configured in the middle of the axial direction of the limiting sleeve 422. When the auxiliary temperature control component 430 is connected to the limiting sleeve 422, it can be wrapped around the outer side of the limiting sleeve 422 and arranged in the limiting groove 4221.

[0040] It is understood that in this embodiment, by providing a limiting slot 4221 on the limiting sleeve 422 for arranging the auxiliary temperature control component 430, the auxiliary temperature control component 430 can be limited by the limiting slot 4221, so that the auxiliary temperature control component 430 can be kept stable, thereby avoiding the phenomenon of the auxiliary temperature control component 430 moving or shaking and conducting electricity or sparking with the water-cooled intermediate frequency induction coil component 410.

[0041] More specifically, the water-cooled intermediate frequency induction coil assembly 410 includes a first water-cooling pipe 411, and the auxiliary temperature control assembly 430 includes a second water-cooling pipe 431. Both the first water-cooling pipe 411 and the second water-cooling pipe 431 are made of oxygen-free copper material.

[0042] like Figure 2 and Figure 3 As shown in this embodiment, the water-cooled intermediate frequency induction coil assembly 410 may include a first water-cooling pipe 411, and the auxiliary temperature control assembly 430 may include a second water-cooling pipe 431. The first water-cooling pipe 411 can be energized to achieve heating, and it can also facilitate the flow of cooling water to achieve temperature control during heating. The second water-cooling pipe 431 can also facilitate the flow of cooling water to achieve auxiliary temperature regulation during heating. Both the first and second water-cooling pipes 411 and 431 can be made of oxygen-free copper. Oxygen-free copper is a material with good electrical conductivity and strong heat resistance. Using it as the material for the first water-cooling pipe 411 ensures the heating effect of the water-cooled intermediate frequency induction coil assembly 410. Furthermore, the high purity of oxygen-free copper reduces scaling when used as the material for the first and second water-cooling pipes 411 and 431. Meanwhile, oxygen-free copper material has excellent formability, and as a material for preparing the first water-cooling pipe 411 and the second water-cooling pipe 431, it is easy to process into the required shape of the first water-cooling pipe 411 and the second water-cooling pipe 431.

[0043] More specifically, the first water-cooling pipe 411 has a square cross-section, and the fixing post 421 is threaded onto a plane of the first water-cooling pipe 411. The second water-cooling pipe 431 has a circular cross-section, and the shape of the limiting groove 4221 is adapted to the second water-cooling pipe 431.

[0044] like Figure 3As shown in this embodiment, by way of example, the cross-section of the first water-cooling pipe 411 can be set to square. The cross-section of the first water-cooling pipe 411 can refer to the section perpendicular to the axis of the first water-cooling pipe 411, so the first water-cooling pipe 411 can be a square pipe. When the fixing post 421 is arranged outside the water-cooled intermediate frequency induction coil assembly 410, it can be arranged on a plane of the first water-cooling pipe 411 and threadedly connected to the first water-cooling pipe 411. The first water-cooling pipe 411 can be provided with nuts and other components for installing and arranging the fixing post 421.

[0045] The cross-section of the second water-cooling pipe 431 can be circular, that is, the second water-cooling pipe 431 can be a round pipe. The shape of the limiting groove 4221 can be an arc groove to fit the second water-cooling pipe 431, and the diameter of the limiting groove 4221 can be equal to the diameter of the second water-cooling pipe 431, so that the second water-cooling pipe 431 can be just locked in the limiting groove 4221.

[0046] It is understood that in this embodiment, by setting the cross-section of the first water-cooling pipe 411 to be square and the cross-section of the second water-cooling pipe 431 to be circular, it is convenient for the thermally conductive insulation component 420 to effectively connect the water-cooled intermediate frequency induction coil component 410 and the auxiliary temperature control component 430, and can ensure the stability of the connection.

[0047] Specifically, both the fixing post 421 and the limiting sleeve 422 are made of ceramic material.

[0048] like Figure 3 As shown in this embodiment, it is illustrated by way of example that both the fixing post 421 and the limiting sleeve 422 can be made of ceramic material. Ceramic material has relatively good thermal conductivity and insulation, which can enable the thermally conductive and insulating component 420 to play an effective role in thermal conduction and insulation in the water-cooled intermediate frequency induction coil component 410 and the auxiliary temperature control component 430.

[0049] Specifically, the water-cooled intermediate frequency induction coil assembly 410 is arranged in a spiral outside the graphite box 200. The thermally conductive insulation components 420 are arranged in several groups along the extension direction of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly 410. The several groups of thermally conductive insulation components 420 are arranged on two turns of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly 410. The auxiliary temperature control component 430 is arranged in an "S" shape between the several groups of thermally conductive insulation components 420 on the two turns of the water-cooled intermediate frequency induction coil assembly 410.

[0050] like Figure 2As shown in this embodiment, by way of example, the first water-cooling tube 411 of the water-cooled intermediate frequency induction coil assembly 410 can be configured as a coil and spirally arranged outside the graphite box 200. When the first water-cooling tube 411 is spirally arranged, one layer of winding forms one turn; and the first water-cooling tube 411 forms several turns when wound. The thermally conductive insulation components 420 can be configured as several groups, and the several groups of thermally conductive insulation components 420 can be divided into two parts and respectively arranged on two turns of the spiral arrangement of the water-cooled intermediate frequency induction coil assembly 410. For example, the several groups of thermally conductive insulation components 420 are divided into two parts and respectively arranged on the first and last turns of the water-cooled intermediate frequency induction coil assembly 410. The second water-cooling tube 431 of the auxiliary temperature control component 430 can be arranged between the several groups of thermally conductive insulation components 420 on the two turns, and the second water-cooling tube 431 can be arranged in an "S" shape. When the second water-cooling pipe 431 of the auxiliary temperature control component 430 is arranged in an "S" shape, it may include an axial section that is parallel to the axis of the water-cooled intermediate frequency induction coil component 410.

[0051] It is understood that in this embodiment, the water-cooled intermediate frequency induction coil assembly 410 is arranged in a spiral outside the graphite box 200, and the auxiliary temperature control assembly 430 is arranged in an "S" shape between several groups of thermally conductive and insulating assemblies 420 on two turns of the water-cooled intermediate frequency induction coil assembly 410. This allows the extension direction of the auxiliary temperature control assembly 430 to have multiple intersection points with the extension direction of the water-cooled intermediate frequency induction coil assembly 410, thereby ensuring the heat exchange effect between the auxiliary temperature control assembly 430 and the water-cooled intermediate frequency induction coil assembly 410, so as to improve the response rate of the auxiliary temperature control assembly 430 in adjusting the temperature and ensure the accuracy of the temperature adjustment.

[0052] More specifically, the auxiliary temperature control component 430 is arranged in several groups along the axial direction of the water-cooled intermediate frequency induction coil component 410.

[0053] like Figure 2 As shown in this embodiment, by way of example, the auxiliary temperature control component 430 can be configured in several groups along the axial direction of the horizontal intermediate frequency induction coil component, such as three, four, or five groups. For any group of auxiliary temperature control components 430, the axial section of its second water-cooling pipe 431 passes through at least two turns of the first water-cooling pipe 411. That is, at least two turns of the first water-cooling pipe 411 are also provided between the two turns of the first water-cooling pipe 411 used to arrange the thermally conductive insulation component 420, so that the auxiliary temperature control component 430 can effectively exchange heat with the horizontal intermediate frequency induction coil component.

[0054] Several groups of horizontal intermediate frequency induction coil assemblies can employ independent cooling water circulation systems to provide different temperature regulation capabilities. When uneven temperature occurs along the axial direction of the water-cooled intermediate frequency induction coil assembly 410, for example, when the temperature in the middle of the axial direction of the water-cooled intermediate frequency induction coil assembly 410 is higher than the temperature at both ends, the temperature of the water-cooled intermediate frequency induction coil assembly 410 can be appropriately adjusted by auxiliary temperature control components 430 at different axial positions to maintain a uniform axial temperature for the water-cooled intermediate frequency induction coil assembly 410.

[0055] It is understood that in this embodiment, by setting the auxiliary temperature control component 430 in several groups along the axial direction of the water-cooled intermediate frequency induction coil component 410, the temperature of the water-cooled intermediate frequency induction coil component 410 can be appropriately adjusted by the auxiliary temperature control component 430 at different axial positions, thereby enabling the auxiliary temperature control component 430 to heat the graphite box 200 uniformly.

[0056] Specifically, the equipment also includes a heat preservation device 500, which is installed inside the furnace body 100 and outside the heating device 400 and the graphite box 200. The heat preservation device 500 is used to keep the heating device 400 and the graphite box 200 warm.

[0057] like Figure 1 As shown in this embodiment, by way of example, the device may further include a heat preservation device 500, which may be disposed outside the heating device 400 and the graphite box 200, and may be used to preserve the heating device 400 and the graphite box 200. The heat preservation device 500 may also be configured as a cylindrical structure, with openable and closable heat preservation covers 510 at both ends. The device may also include a telescopic drive device 600 for driving the heat preservation cover 510 to move telescopically, and the telescopic end of the telescopic drive device 600 may pass through the furnace cover 120 and be connected to the heat preservation cover 510. One of the telescopic drive devices 600 may be arranged on a guide rail. By sliding the telescopic device on the guide rail, when the furnace cover 120 is opened, the heat preservation cover 510 may be further opened inside the furnace body 100, facilitating the removal and placement of titanium alloy parts inside the graphite box 200.

[0058] It is understood that this embodiment uses a heat preservation device 500 to prevent the temperature inside the graphite box 200 from being lost, thereby facilitating the sintering of the titanium alloy parts.

[0059] The implementation principle of the device for sintering titanium alloys based on a graphite vacuum sintering furnace provided in this application embodiment is as follows:

[0060] When sintering titanium alloy parts, the furnace lid 120, insulation lid 510, and furnace lid 210 are opened sequentially to arrange the titanium alloy parts to be sintered inside the graphite furnace 200. Then, the furnace lid 210, insulation lid 510, and furnace lid 120 are closed sequentially. Subsequently, a vacuum environment is created inside the graphite furnace 200 using a vacuum pump 300, and the graphite furnace 200 and the titanium alloy parts inside it are sintered using a water-cooled intermediate frequency induction coil assembly 410. When the water-cooled intermediate frequency induction coil assembly 410 heats the graphite furnace 200, the auxiliary temperature control assembly 430 can exchange heat with the water-cooled intermediate frequency induction coil assembly 410, allowing the water-cooled intermediate frequency induction coil assembly 410 to quickly and accurately control its heating temperature of the graphite furnace 200, thereby ensuring that the temperature rise inside the graphite furnace 200 meets the requirements. Once the titanium alloy parts have been sintered and cooled, the furnace cover 120, the insulation cover 510, and the box cover 210 can be opened in sequence to remove the titanium alloy parts.

[0061] This application configures the heating device 400 with at least a water-cooled intermediate frequency induction coil assembly 410, a thermally conductive insulation assembly 420, and an auxiliary temperature control assembly 430. The auxiliary temperature control assembly 430 exchanges heat with the water-cooled intermediate frequency induction coil assembly 410 when the water-cooled intermediate frequency induction coil assembly 410 heats the graphite box 200, thereby assisting in regulating the temperature rise of the graphite box 200 when the water-cooled intermediate frequency induction coil assembly 410 heats the graphite box 200. This allows the temperature inside the graphite box 200 to rise from a first temperature range to a second temperature range, and for the first temperature rise in the first temperature range to decrease to a second temperature rise in the second temperature range, resulting in a rapid and timely adjustment process and shortening the response time. At the same time, it ensures accurate and precise adjustment, guaranteeing the precision of the adjustment process.

[0062] This application also provides a process for sintering titanium alloys using a graphite vacuum sintering furnace. The process uses any of the equipment provided in this application for sintering titanium alloys using a graphite vacuum sintering furnace to sinter titanium alloy components.

[0063] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An apparatus for sintering a titanium alloy based on a graphite vacuum sintering furnace, characterized by, The device comprises: a furnace body (100) in which a graphite box (200) is arranged, the graphite box (200) being used for sintering titanium alloy parts in a vacuum environment; a vacuumizing device (300) in communication with the graphite box (200) and used for forming a vacuum environment inside the graphite box (200); a heating device (400) arranged in the furnace body (100), the heating device (400) comprising a water-cooled medium-frequency induction coil assembly (410), a heat-conducting and insulating assembly (420) and an auxiliary temperature control assembly (430), the heat-conducting and insulating assembly (420) connecting and heat-conducting and insulatingly arranging the water-cooled medium-frequency induction coil assembly (410) and the auxiliary temperature control assembly (430), the water-cooled medium-frequency induction coil assembly (410) being arranged outside the graphite box (200) and used for heating the graphite box (200), the auxiliary temperature control assembly (430) being used for heat exchanging with the water-cooled medium-frequency induction coil assembly (410) when the water-cooled medium-frequency induction coil assembly (410) heats the graphite box (200) to assist in adjusting the temperature rise of the graphite box (200) when the water-cooled medium-frequency induction coil assembly (410) heats the graphite box (200), the temperature rise of the graphite box (200) comprising a first temperature rise in a first temperature range and a second temperature rise in a second temperature range, the first temperature range being smaller than the second temperature range, and the first temperature rise being greater than the second temperature rise; the water-cooled medium-frequency induction coil assembly (410) comprising a first water-cooled pipe (411), and the auxiliary temperature control assembly (430) comprising a second water-cooled pipe (431); the water-cooled medium-frequency induction coil assembly (410) being arranged in a spiral outside the graphite box (200), the heat-conducting and insulating assembly (420) being arranged in a plurality of groups along the extension direction of the spiral arrangement of the water-cooled medium-frequency induction coil assembly (410), the plurality of groups of the heat-conducting and insulating assembly (420) being arranged on two turns of the spiral arrangement of the water-cooled medium-frequency induction coil assembly (410), and the auxiliary temperature control assembly (430) being arranged in an "S" shape between the plurality of groups of the heat-conducting and insulating assembly (420) on the two turns of the water-cooled medium-frequency induction coil assembly (410), the auxiliary temperature control assembly (430) comprising an axial section arranged in parallel with the axis of the water-cooled medium-frequency induction coil assembly (410).

2. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 1, characterized in that, The heat-conducting and insulating assembly (420) comprises a fixing column (421) arranged outside the water-cooled medium-frequency induction coil assembly (410) and a limiting sleeve (422) arranged on the fixing column (421), and the auxiliary temperature control assembly (430) is connected with the limiting sleeve (422).

3. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 2, characterized in that, The limiting sleeve (422) is provided with a limiting clamping groove (4221), and the auxiliary temperature control assembly (430) is arranged around the limiting sleeve (422) and in the limiting clamping groove (4221).

4. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 3, characterized in that, The first water-cooled pipe (411) and the second water-cooled pipe (431) are made of oxygen-free copper material.

5. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 4, characterized in that, The first water-cooled pipe (411) is square in cross section, the fixing column (421) is threadedly connected to one plane of the first water-cooled pipe (411), and the second water-cooled pipe (431) is circular in cross section, and the shape of the limiting clamping groove (4221) is matched with the second water-cooled pipe (431).

6. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 2, characterized in that, The fixing column (421) and the limiting sleeve (422) are made of ceramic material.

7. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 1, characterized in that, The auxiliary temperature control assembly (430) is arranged in several groups along the axial direction of the water-cooled intermediate frequency induction coil assembly (410).

8. The apparatus for sintering titanium alloys based on graphite vacuum sintering furnace according to claim 1, characterized in that, The device further comprises a heat preservation device (500) arranged in the furnace body (100) and outside the heating device (400) and the graphite box (200), and used for heat preservation of the heating device (400) and the graphite box (200).

9. A process for sintering titanium alloys based on graphite vacuum sintering furnaces, characterized by, The process uses the device for sintering titanium alloy based on the graphite vacuum sintering furnace of any one of claims 1-8 to sinter a titanium alloy part.

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