A high-speed rail brake disc steel salt bath quenching device

Abstract

The application relates to a high-iron brake disc steel salt bath quenching device, and belongs to the technical field of heat treatment equipment, which solves the technical problems of poor safety and inconvenience of the salt bath quenching device, and the solution is as follows: the high-iron brake disc steel salt bath quenching device comprises a heat treatment box, a heat preservation structure and a salt bath tank, two groups of mounting tables are arranged on the two sides in the heat treatment box, movable platforms are arranged on the inner sides of the two groups of mounting tables, two groups of electromagnetic guide rails are arranged on the two sides in the movable platforms, movable plates are arranged on the inner sides of the electromagnetic guide rails, mounting plates are fixedly arranged on the top of the movable plates, positioning rings are arranged on the top of the mounting plates, a first salt bath tank and a second salt bath tank are arranged on the top of the mounting plates and located on the inner sides of the positioning rings. The device is flexible to adjust, is suitable for brake discs of multiple size specifications, reduces the adjustment time, improves the efficiency and the accuracy, has good temperature insulation, is convenient to maintain, reduces the cost, guarantees the isothermal quenching, is accurate in temperature control, saves energy and reduces consumption, and improves the salt bath quenching quality and the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of heat treatment equipment technology, specifically to a salt bath quenching equipment for high-speed rail brake discs. Background Technology

[0002] In high-speed rail operation, the brake disc plays a crucial role, directly affecting the safety and reliability of the train's braking system. The quality of the steel used in high-speed rail brake discs is decisive for their stable operation under harsh conditions such as high speed and heavy load. Isothermal quenching, a heat treatment process that significantly improves the comprehensive performance of steel, is widely used in the processing of steel for high-speed rail brake discs. Salt bath quenching equipment is the key equipment for realizing this process. It places the brake disc steel in a salt bath at a specific temperature, allowing the steel to undergo an isothermal transformation from austenite to bainite, thereby obtaining a good combination of strength and toughness. This transformation endows the steel with excellent fatigue resistance, wear resistance, and thermal stability, ensuring that the brake disc can withstand high temperature, high pressure, and high friction during frequent braking, effectively extending the service life of the brake disc and ensuring the safety and stability of high-speed rail operation. With the rapid development of the high-speed rail industry, the performance requirements for brake discs are increasing. Therefore, the development of advanced salt bath quenching equipment to meet the high-quality processing needs of high-speed rail brake disc steel is urgent.

[0003] Traditional salt bath quenching equipment for high-speed rail brake discs has many shortcomings, which seriously restricts the production quality and efficiency of brake discs:

[0004] First, the temperature control is not precise enough. The heating and temperature control systems of traditional equipment are relatively simple and it is difficult to accurately maintain the strict temperature conditions required for isothermal quenching. During the quenching process, temperature fluctuations will cause uneven transformation of the steel structure, resulting in differences in the performance of different parts of the brake disc, reducing the overall reliability and stability of the brake disc, and potentially causing safety hazards such as unstable braking performance in actual operation.

[0005] Secondly, the equipment has poor adaptability to different specifications of brake discs. With the continuous development of high-speed rail technology, the specifications and models of brake discs are becoming increasingly diversified. However, the structural design of traditional equipment is relatively fixed, making it difficult to quickly and conveniently adjust to meet the processing needs of brake discs of different sizes and shapes. This results in a lot of time being spent on equipment debugging and modification when producing brake discs of different specifications. In some cases, equipment limitations may prevent the production of certain special specifications of brake discs, greatly reducing production efficiency and increasing production costs.

[0006] In addition, traditional equipment also presents difficulties in maintenance. Its complex structural design makes it difficult for maintenance personnel to quickly access key internal components for inspection and maintenance. Furthermore, its poor sealing and heat insulation performance not only increases energy consumption but also easily leads to salt bath leakage, polluting the working environment and affecting the normal operation and service life of the equipment, thereby affecting the production progress and quality of high-speed rail brake discs.

[0007] To address the aforementioned problems, this invention proposes a salt bath quenching device for high-speed rail brake discs. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a salt bath quenching device for high-speed rail brake discs, comprising a heat treatment chamber, an insulation structure, a first salt bath tank, and a second salt bath tank. The heat treatment chamber contains at least two sets of mounting platforms. Heaters are installed on the top surface of the heat treatment chamber's inner cavity, corresponding to each set of mounting platforms. Each set of mounting platforms has a movable platform installed on its inner side. Two sets of electromagnetic rails are arranged parallel to each other on the left and right sides of the movable platform. A movable plate spans the electromagnetic rails on both sides. An installation plate is fixedly installed on the top of the movable plate. A positioning ring is installed on the top of the installation plate. Two sets of electric telescopic rods are arranged horizontally on both sides of the positioning ring. The output end of each electric telescopic rod extends to the inner side of the positioning ring, and a clamping plate is installed at the output end of the electric telescopic rod. The second salt bath tank is installed on the top of the installation plate, inside the positioning ring. The first salt bath tank is positioned above the second salt bath tank. The insulation structure wraps around the exterior of both the first and second salt bath tanks.

[0009] The first salt bath includes a first placement box, a spiral guide channel, positioning blocks, and a protective plate. The inner wall of the first placement box is provided with a spiral guide channel, and two sets of positioning blocks are provided on both sides of the bottom of the first placement box. A protective plate is provided on the bottom surface of the inner cavity of the first placement box. The protective plate is circular in shape, and several protective pads are evenly distributed on the surface of the protective plate along the circumferential direction.

[0010] The second salt bath includes a second placement box, an insulation layer, an anti-corrosion film, and an induction seat. The insulation layer is disposed in the interlayer of the side wall of the second placement box, and the anti-corrosion film is disposed on the side wall of the inner cavity of the second placement box.

[0011] Furthermore, the heat treatment chamber has two sets of protective doors installed on the front, and the front of the protective doors is provided with protective windows for observation. A heater is installed on the top inside the heat treatment chamber.

[0012] Furthermore, the top of the active platform is provided with a semi-circular arc structure groove, and the rear side of the active platform is provided with two sets of through holes.

[0013] Furthermore, the heat insulation structure includes a sealing cover, ear seats, movable arms, and a heat insulation film. Ear seats are symmetrically installed on the outer wall of the sealing cover. The ear seats are hinged to the lower end of the movable arms, and the upper end of the movable arms is hinged to the inner wall of the heat treatment chamber. The heat insulation film is disposed on the side wall of the inner cavity of the sealing cover.

[0014] Furthermore, the bottom of the second placement box is provided with an induction seat, which is an electromagnetic induction type induction base, and the interior of the induction seat includes an iron core, windings and a shell, and the induction seat adopts a circular structure.

[0015] Compared with the prior art, the present invention provides a salt bath quenching equipment for high-speed rail brake discs, which has the following beneficial effects:

[0016] 1. This device exhibits excellent flexibility through the coordinated linkage of the movable platform, positioning ring and its auxiliary structures. The semi-circular arc groove on the top of the movable platform and the through holes at both ends allow it to move and rotate flexibly on the mounting platform, reducing equipment adjustment time, greatly improving production efficiency, and making the quality of the heat-treated brake disc more reliable.

[0017] 2. The insulation structure of this device, through the linkage of the sealing cover, lugs, movable arms, and the inner wall of the heat treatment chamber, achieves excellent thermal insulation and convenient maintenance. The thermal insulation film inside the sealing cover effectively blocks heat loss. When maintenance is required, the operator can easily open the passage for internal operation by operating the lugs and using the movable arms to move the sealing cover. After the operation, it can be quickly reset to restore the integrity of the insulation structure. Traditional equipment may require the disassembly of a large number of parts for maintenance due to the fixed insulation structure, and it is difficult to guarantee that the thermal insulation performance will not be affected after maintenance. This device not only reduces maintenance time and cost, but also ensures efficient thermal insulation during equipment operation, providing strong protection for stable isothermal quenching processes.

[0018] 3. This device achieves precise temperature control and efficient energy utilization through the linkage between the protective door on the front of the heat treatment chamber and the internal heater. The excellent sealing of the protective door greatly reduces heat exchange, allowing the heater to quickly heat up the heat treatment chamber and maintain a stable quenching temperature. Operators can observe the internal situation through the protective window, avoiding temperature fluctuations caused by frequent door openings. In contrast, traditional equipment may require repeated heating due to frequent door openings for cooling, consuming more energy. This precise temperature control not only improves the quenching quality and ensures stable brake disc performance, but also reduces production costs and increases production efficiency by reducing energy waste. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the internal processing structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the event platform;

[0022] Figure 4 A three-dimensional structural diagram of the event platform is provided.

[0023] Figure 5 A three-dimensional structural diagram of the insulation structure;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the thermal insulation structure;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the salt bath tank assembly;

[0026] Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the first salt bath tank;

[0027] Figure 9 This is a schematic diagram of the three-dimensional cross-sectional structure of the second salt bath tank.

[0028] In the diagram: 1. Heat treatment chamber; 101. Protective door; 102. Heater; 2. Mounting platform; 3. Movable platform; 301. Electromagnetic guide rail; 302. Movable plate; 4. Mounting plate; 401. Positioning ring; 402. Electric telescopic rod; 403. Pressing plate; 5. Thermal insulation structure; 501. Sealing cover; 502. Ear seat; 503. Movable arm; 504. Thermal insulation film; 6. First salt bath tank; 601. First placement box; 602. Spiral guide channel; 603. Positioning block; 604. Protective plate; 7. Second salt bath tank; 701. Second placement box; 702. Thermal insulation layer; 703. Anti-corrosion film; 704. Induction seat. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-9A salt bath quenching device for high-speed rail brake disc steel includes a heat treatment chamber 1, an insulation structure 5, a first salt bath tank 6, and a second salt bath tank 7. The heat treatment chamber 1 has at least two sets of mounting platforms 2 inside. Heaters 102 are installed on the top surface of the inner cavity of the heat treatment chamber 1, corresponding to each set of mounting platforms 2. A movable platform 3 is installed inside each set of mounting platforms 2. Two sets of electromagnetic guide rails 301 are arranged parallel to each other on the left and right sides inside the movable platform 3. A movable plate 302 spans the electromagnetic guide rails 301 on both sides. A mounting plate 4 is fixedly installed on the top of the movable plate 302. A positioning ring 401 is installed on the top of the mounting plate 4. The second salt bath tank 7 is installed inside the positioning ring 401. The first salt bath tank 6 is located above the second salt bath tank 7. The insulation structure 5 is wrapped around the first salt bath tank 6 and the second salt bath tank 7. The external part of the positioning ring 401 has two sets of electric telescopic rods 402 arranged horizontally on both sides. The output end of the electric telescopic rod 402 extends to the inner side of the positioning ring 401, and a pressure plate 403 is installed on the output end of the electric telescopic rod 402. The electric telescopic rod 402 and the pressure plate 403 at the output end are closely linked, providing flexible and precise control for the positioning and fixing of the first salt bath tank 6 and the second salt bath tank 7. The electric telescopic rod 402 can be precisely controlled to extend or shorten according to the positioning requirements. By controlling the synchronous or asynchronous movement of the electric telescopic rods 402 on both sides, this linkage structure can quickly and accurately position and clamp the first salt bath tank 6 and the second salt bath tank 7, improving the heat treatment efficiency and precision, and making the equipment more flexible and efficient in processing isothermal quenching of various types of high-speed rail brake discs.

[0031] The first salt bath 6 includes a first placement box 601, a spiral guide channel 602, positioning blocks 603, and a protective plate 604. The spiral guide channel 602 is provided on the inner wall of the first placement box 601. Two sets of positioning blocks 603 are provided on both sides of the bottom of the first placement box 601. A protective plate 604 is provided on the bottom surface of the inner cavity of the first placement box 601. The protective plate 604 has a circular structure, and several protective pads are evenly distributed along the circumference on its surface. The positioning blocks 603 on both sides of the bottom of the first placement box 601, the protective plate 604 at the bottom, and other components work together to accurately position and effectively protect the items placed inside the first placement box 601. Specifically, the positioning blocks 603 can cooperate with corresponding structures on the mounting plate 4 or other related components to ensure the first placement box 601... The accurate positioning on the mounting plate 4 provides a stable foundation for subsequent processing operations. The protective plate 604 has an overall circular structure, and multiple sets of circular protective pads are equidistantly arranged on the top. This design can better adapt to the shape of the items placed in the first placement box 601. Especially for round or similar shaped items, the protective plate 604 can evenly distribute the weight of the items through its protective pads, reduce local pressure, and prevent damage to the surface of the items. During the operation of the equipment, when the first placement box 601 moves or is adjusted with the mounting plate 4, the positioning block 603 ensures the stability of its position, while the protective plate 604 continuously provides protection for the internal items, avoiding damage caused by vibration, collision, etc. This linkage mechanism helps to improve the safety and stability of the items during the processing, ensuring that the processing quality is not affected.

[0032] The second salt bath 7 includes a second placement box 701, an insulation layer 702, an anti-corrosion film 703, and an induction seat 704. The insulation layer 702 is disposed in the interlayer of the side wall of the second placement box 701, and the anti-corrosion film 703 is disposed on the side wall of the inner cavity of the second placement box 701. The insulation layer 702 and the anti-corrosion film 703 together provide a suitable storage environment for the billets placed in the second placement box 701. The insulation layer 702 can effectively reduce the heat exchange between the inside of the second placement box 701 and the outside, and maintain the relative stability of the temperature inside the box. This is crucial for some temperature-sensitive billets or billets that require storage in a specific temperature environment. The insulation layer 702 and the anti-corrosion film 703 prevent the blanks placed in the box from reacting chemically with the box wall or being corroded, thus protecting the quality and performance of the items. In practical applications, for example, when salt bath additives that need to be stored at a specific temperature and are susceptible to chemical corrosion are placed inside, the insulation layer 702 can maintain a suitable temperature, and the anti-corrosion film 703 prevents the additives from corroding the box wall, while also preventing the box wall material from contaminating the additives. This linkage between insulation and anti-corrosion functions extends the service life of the second placement box 701, ensures the quality stability of the items placed inside during storage and processing, and provides a reliable guarantee for the isothermal quenching process of high-speed rail brake discs.

[0033] Furthermore, two sets of protective doors 101 are installed on the front of the heat treatment chamber 1, and a protective window for observation is provided on the front of the protective door 101. A heater 102 is installed on the top inside the heat treatment chamber 1.

[0034] Furthermore, the top of the movable platform 3 is provided with a semi-circular arc structure groove, and the rear side of the movable platform 3 is provided with two sets of through holes. The semi-circular arc structure groove on the top of the movable platform 3 and the two sets of through holes at both ends cooperate with each other, creating a close linkage effect with other components, laying the foundation for the precise adjustment and efficient operation of the equipment.

[0035] Furthermore, the insulation structure 5 includes a sealing cover 501, lugs 502, a movable arm 503, and a heat insulation film 504. Lugs 502 are symmetrically installed on the outer wall of the sealing cover 501. The lugs 502 are hinged to the lower end of the movable arm 503, and the upper end of the movable arm 503 is hinged to the inner wall of the heat treatment chamber 1. When it is necessary to inspect, replace parts, or clean the inside of the heat treatment chamber 1, the operator can operate the lugs 502 to move the movable arm 503, thus opening the passage and facilitating entry into the heat treatment chamber 1. Inside, after the operation is completed, the sealing cover 501 is reset via the ear seat 502 to restore the integrity of the insulation structure 5. This linkage mechanism greatly improves the maintainability of the equipment without affecting the insulation effect. At the same time, the movable arm 503 can also make fine adjustments to the position of the sealing cover 501 during the operation of the equipment according to the thermal expansion and contraction inside the heat treatment box 1, ensuring that the sealing cover 501 is always in close contact with the inner wall of the heat treatment box 1 and maintains good insulation performance; the insulation film 504 is set on the side wall of the inner cavity of the sealing cover 501.

[0036] The insulation structure 5 achieves excellent thermal insulation, ensuring the stability of the salt bath environment inside the heat treatment chamber 1. The sealing cover 501, as the main part of the insulation structure 5, directly blocks the heat transfer between the inside of the heat treatment chamber 1 and the outside. The lugs 502 installed on its outer side are connected to the movable arm 503, and the other end of the movable arm 503 is connected to the inner wall of the heat treatment chamber 1. This structure allows the sealing cover 501 to be flexibly adjusted according to processing requirements. When the equipment is installed, maintained, or when internal operations are required, the sealing cover 501 can be moved to a suitable position through the lugs 502 and the movable arm 503. The thermal insulation film 504 on the inner side of the sealing cover 501 further enhances the thermal insulation performance and reduces the conduction of heat through the sealing cover 501. During equipment operation, the sealing cover 501 and the thermal insulation film 504 work closely together to effectively prevent heat loss, enabling the heater 102 to maintain the temperature stability inside the heat treatment chamber 1 more efficiently and reduce energy waste. This linkage design ensures both thermal insulation effect and the operability and maintenance convenience of the equipment.

[0037] Furthermore, the bottom of the second placement box 701 is provided with an induction seat 704. The induction seat 704 is an electromagnetic induction type induction base, and its interior includes an iron core, windings, and a shell. The induction seat 704 has a circular structure and forms a unique linkage with the second placement box 701 and other related components, adding intelligent and precise control functions to the device. The induction seat 704 works on the principle of electromagnetic induction. When there is a specific change in electromagnetic signal, its internal windings will generate an induced electromotive force. When the position of the item placed in the second placement box 701 changes, its weight changes, or a specific magnetic material approaches, it will cause a magnetic field around the induction seat 704. Changes are detected by the induction seat 704, and the detection result can be fed back to the equipment's control system to achieve precise control of the processing. If a salt bath additive that requires precise measurement is placed, when the weight of the additive reaches the set value, the induction seat 704 detects the weight change and transmits the signal to the control system. The control system can stop the addition operation in time to ensure the accuracy of the additive dosage. At the same time, the circular structure of the induction seat 704 is compatible with the bottom of the second placement box 701, which can better install and fix it, ensuring the stability and accuracy of the sensing. This linkage mechanism improves the automation level and processing accuracy of the equipment and helps to optimize the process control of isothermal quenching of high-speed rail brake discs.

[0038] Working principle: The protective door 101 on the front of the heat treatment chamber 1 is linked to the heater 102 on the top inside, achieving the effect of stabilizing the processing temperature and ensuring safety. The protective door 101 has a protective window on the inside front, which can effectively reduce the heat exchange between the heat treatment chamber 1 and the outside when closed, creating good conditions for the heater 102 to maintain a stable temperature inside the chamber. The heater 102 heats the inside of the heat treatment chamber 1 according to the preset temperature of the isothermal quenching process. During the heating process, the good sealing of the protective door 101 helps the heater 102 to heat up quickly and maintain a constant temperature, reducing energy consumption. The operator can observe the internal situation through the protective window without frequently opening the protective door 101, avoiding temperature fluctuations from affecting the quenching quality. This linkage not only ensures the safety of the operator, but also ensures a stable thermal environment inside the heat treatment chamber 1, providing reliable temperature conditions for the isothermal quenching of high-speed rail brake discs. With the help of the semi-circular arc structure groove on the top of the movable platform 3 and the through holes at both ends, the mounting platform 2 and the positioning ring 401 are linked to achieve the effect of precise adjustment and stable positioning of the first salt bath tank 6 and the second salt bath tank 7.

[0039] By utilizing the sealing cover 501, ear seat 502, and movable arm 503 in the insulation structure 5 in conjunction with the inner wall of the heat treatment chamber 1, a good insulation effect and convenient operation and maintenance are achieved. The insulation film 504 on the inner side of the sealing cover 501 enhances the insulation performance and reduces heat conduction. The ear seat 502 connects the sealing cover 501 and the movable arm 503. The other end of the movable arm 503 is connected to the inner wall of the heat treatment chamber 1. When the equipment is running, the sealing cover 501 and the insulation film 504 work closely together to effectively block heat loss and help the heater 102 maintain the temperature inside the chamber. When it is necessary to inspect, clean, or replace parts inside the heat treatment chamber 1, the operator operates the ear seat 502 to move the movable arm 503 to move the sealing cover 501, opening the passage for easy operation. After the operation is completed, the sealing cover 501 is reset to restore the integrity of the insulation structure. This linkage greatly improves the maintainability and ease of operation of the equipment while ensuring the insulation effect.

[0040] During use, the salt bath additive is added to the first salt bath tank 6 and the second salt bath tank 7 respectively. Then, the dried high-speed rail brake discs to be heat-treated are placed into the first salt bath tank 6 and the second salt bath tank 7 respectively. The mounting plate 4, the mounting platform 2, and the movable platform 3 clamp the first salt bath tank 6 and the second salt bath tank 7 and retract them into the sealing cover 501. The sealing cover 501 is closed, the heat treatment box 1 is closed, and the heater 102 is started. The high-speed rail brake discs in the first salt bath tank 6 and the second salt bath tank 7 can then undergo isothermal quenching heat treatment. After the heat treatment is completed, the above operation is reversed and the high-speed rail brake discs are removed.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-speed rail brake disc steel salt bath quenching apparatus characterized by: The system includes a heat treatment chamber (1), an insulation structure (5), a first salt bath (6), and a second salt bath (7). The heat treatment chamber (1) is equipped with at least two sets of mounting platforms (2). Heaters (102) are installed on the top surface of the heat treatment chamber (1) corresponding to each set of mounting platforms (2). Each set of mounting platforms (2) has an inner side equipped with a movable platform (3). Two sets of electromagnetic rails (301) are arranged parallel to each other on the left and right sides of the movable platform (3). A movable plate (302) spans the electromagnetic rails (301) on both sides. A mounting plate (4) is fixedly installed on the top of the movable plate (302). The mounting plate (4) is equipped with a positioning ring (401) on the top. Two sets of electric telescopic rods (402) are provided on both sides of the positioning ring (401) in the horizontal direction. The output end of the electric telescopic rod (402) extends to the inner side of the positioning ring (401), and a pressure plate (403) is installed on the output end of the electric telescopic rod (402). The top of the mounting plate (4) is located inside the positioning ring (401) and a second salt bath tank (7) is installed. The first salt bath tank (6) is located above the second salt bath tank (7). The heat insulation structure (5) is wrapped around the outside of the first salt bath tank (6) and the second salt bath tank (7). The first salt bath tank (6) includes a first placement box (601), a spiral guide channel (602), a positioning block (603), and a protective plate (604). The inner wall of the first placement box (601) is provided with a spiral guide channel (602). Two sets of positioning blocks (603) are provided on both sides of the bottom of the first placement box (601). The bottom surface of the inner cavity of the first placement box (601) is provided with a protective plate (604). The protective plate (604) is circular in shape, and several protective pads are evenly distributed along the circumferential direction on the surface of the protective plate (604). The second salt bath tank (7) includes a second placement box (701), a heat insulation layer (702), an anti-corrosion film (703), and an induction seat (704). The heat insulation layer (702) is disposed in the interlayer of the side wall of the second placement box (701), and the anti-corrosion film (703) is disposed on the side wall of the inner cavity of the second placement box (701).

2. A high-speed rail brake disc steel salt bath quenching apparatus according to claim 1, characterized in that: The heat treatment chamber (1) is equipped with two sets of protective doors (101) on the front, and the front of the protective doors (101) is provided with protective windows for observation.

3. A high-speed rail brake disc steel salt bath quenching apparatus according to claim 1, characterized in that: The top of the active platform (3) is provided with a semi-circular arc structure groove, and the rear side of the active platform (3) is provided with two sets of through holes.

4. A high-speed rail brake disc steel salt bath quenching apparatus according to claim 1, characterized in that: The heat insulation structure (5) includes a sealing cover (501), an ear seat (502), a movable arm (503), and a heat insulation film (504). The ear seats (502) are symmetrically installed on the outer wall of the sealing cover (501). The ear seats (502) are hinged to the lower end of the movable arm (503), and the upper end of the movable arm (503) is hinged to the inner wall of the heat treatment box (1). The heat insulation film (504) is disposed on the side wall of the inner cavity of the sealing cover (501).

5. A high-speed rail brake disc steel salt bath quenching apparatus according to claim 1, characterized in that: The bottom of the second placement box (701) is provided with an induction seat (704). The induction seat (704) is an electromagnetic induction type induction base, and the interior of the induction seat (704) includes an iron core, windings and a shell. The induction seat (704) adopts a circular structure.

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