A continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials

Abstract

The application provides a continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials, and relates to the technical field of heat treatment devices, so as to solve the technical problems of single continuous annealing function, non-continuous tension stress cycle and low tension control precision of the heat treatment device for amorphous and nanocrystalline alloy materials in the prior art. The continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials is provided with a magnetic hysteresis brake roller group, a tension sensor, a vibration pulse controller, a tubular furnace heating unit and a stepping motor roller group on a rack in sequence from front to back. Two fixed idlers of the vibration pulse controller are arranged in the front-rear direction at the same height. A driving member is connected to and drives a first base to move in the up-down direction. A movable pulley is rotatably connected to the first base and located between the two fixed idlers. The magnetic hysteresis brake roller group, the tension sensor, the vibration pulse controller and the stepping motor roller group are electrically connected to a main control device.

Description

Technical Field

[0001] This invention relates to the field of heat treatment equipment technology, specifically to a continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials. Background Technology

[0002] Amorphous alloys are amorphous structures with randomly arranged atoms, obtained by rapid cooling of melts. Nanocrystalline alloys, on the other hand, have nanoscale grains precipitated on an amorphous matrix, and can be prepared directly by rapid quenching or by crystallization treatment of amorphous alloys. Amorphous and nanocrystalline alloy strips, wires, and other continuous materials are collectively referred to as amorphous and nanocrystalline alloy materials. Amorphous and nanocrystalline alloy materials are core soft magnetic materials for key electronic devices such as high-frequency inductors, new energy vehicle drive modules, and smart grid transformers. Their magnetic and mechanical properties directly determine the operating efficiency, stability, and lifespan of these devices.

[0003] With the upgrading of electronic information technology towards higher frequencies and smaller sizes, and the increasing demands of the new energy industry for device reliability and ease of processing, amorphous and nanocrystalline alloy materials with both excellent soft magnetic properties and good processing toughness have become the core demand of the industry. When iron-based amorphous materials are prepared by single-roll melt spinning, the rapid cooling process introduces a large amount of internal tensile stress. Specific annealing and tensile stress control processes are needed to optimize performance. Tension annealing, by applying directional and stable tension to the material, guides the randomly distributed magnetic domains within to align along the direction of force. This ordered arrangement not only significantly improves the material's DC bias performance, allowing it to maintain good magnetic permeability under external bias magnetic fields, but also effectively reduces hysteresis loss, minimizing energy loss during magnetic field changes. Simultaneously, it optimizes the frequency stability of magnetic permeability, ensuring stable magnetic properties across a wide operating range. Dynamic tensile stress cycling, through periodic tension fluctuations, creates a gradient tensile stress field within the material, causing the residual tensile stress generated during rapid cooling to be uniformly released along the thickness direction. This stress release not only further refines the magnetic domain structure to enhance magnetic stability and optimize soft magnetic properties, but also reduces microcracks and defects within the material, improves the uniformity of the microstructure, and ultimately enhances the material's toughness, preventing brittle fracture during subsequent cutting, winding, and other processing stages. Especially in the process of strip punching, the superior toughness can alleviate the impact of punching force on the die, reduce die wear and damage, and extend the die service life.

[0004] Currently, the heat treatment and tensile stress cycling control of amorphous and nanocrystalline alloy materials mainly rely on two independent processes: one is the continuous tension heat treatment process, which achieves batch processing through continuous material transfer and constant tension application. This process, relying on a mature transfer architecture, can meet the needs of industrial production capacity, but it can only provide a single constant tension effect and cannot achieve dynamic tensile stress cycling. The other is the static tensile stress cycling process, which optimizes the structure and improves the toughness and magnetic property uniformity of the material by applying periodic tensile stress to a fixed, static material. However, this process needs to be carried out offline and cannot be coordinated with the continuous annealing process, resulting in cumbersome production procedures, low connection efficiency, and difficulty in ensuring batch-to-batch performance consistency. At the same time, the tension control of existing continuous tension annealing devices mostly adopts mechanical friction or pneumatic structures, which have limited control precision and are prone to tension fluctuations, leading to disordered magnetic domain arrangement. The open design of the tube furnace is prone to heat loss, forming an uneven temperature field, which further affects the stability of material performance.

[0005] To address these issues, existing technical solutions mainly fall into two categories: one focuses on optimizing continuous annealing equipment, such as improving tension control or anti-deviation measures; the other employs static stress cycling technology, such as batch-based cyclic processing of stationary materials using a fixed roller structure within a vacuum chamber. The former cannot achieve dynamic stress cycling, while the latter suffers from low production efficiency and becomes a bottleneck in production capacity due to its inability to adapt to continuous conveying processes. Furthermore, some continuous annealing equipment itself suffers from low tension control accuracy and poor temperature field uniformity. This discrete nature of the process and the limited functionality of the equipment severely restrict the efficiency and overall performance stability of mass production of amorphous and nanocrystalline alloy materials, making it difficult to meet the large-scale demands of precision electronic devices. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials, thereby solving the technical problems of existing heat treatment devices for amorphous and nanocrystalline alloy materials having a single continuous annealing function, inability to achieve continuous tensile stress cycling, and low tension control accuracy.

[0007] To solve the above technical problems, the present invention provides a continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials, including a frame and a main control device. The frame is provided with a hysteresis brake roller group, a tension sensor, a vibration pulse controller, a tube furnace heating unit and a stepper motor roller group in sequence from front to back.

[0008] The vibration pulse controller includes a first base, a driving component, a movable pulley, and two fixed idler wheels. The two fixed idler wheels are set at the same height along the front-to-back direction. The driving component is connected to and drives the first base to move along the up-down direction. The movable pulley is rotatably connected to the first base and located between the two fixed idler wheels.

[0009] The heating unit of the tubular furnace is provided with first through holes at both ends for amorphous and nanocrystalline alloy materials to pass through.

[0010] The hysteresis brake roller assembly, tension sensor, vibration pulse controller, and stepper motor roller assembly are all electrically connected to the main control equipment.

[0011] With the above structure, the continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials of the present invention has the following advantages: When the device only needs to perform continuous tension annealing, the driving component does not move, the movable pulley remains stationary, and the device relies entirely on the cooperation of the hysteresis brake roller group and the stepper motor roller group of the continuous annealing equipment to accurately complete the continuous annealing operation under constant tension, ensuring the stability of traditional processes; when it is necessary to perform tensile stress cycling on the conveyed material, the vibration pulse controller can be activated, and the driving component drives the movable pulley to perform periodic reciprocating motion, applying pulsed dynamic tension fluctuations to the continuously conveyed material to complete the tensile stress cycling treatment, breaking through the bottleneck of traditional tensile stress cycling relying on static batch processing, allowing pulsed tensile stress cycling to be carried out synchronously with continuous material conveying and continuous annealing, significantly improving processing efficiency, perfectly matching the batch production capacity of continuous annealing equipment, and meeting the needs of large-scale industrialization; the two processes can share continuous tension annealing. The conveying, temperature control, and tension control systems of the continuous annealing equipment eliminate the need for additional dedicated tension stress cycling equipment as in traditional methods, significantly reducing initial equipment investment. It also eliminates the need for material switching and debugging between the two types of equipment, simplifying the production process and improving efficiency. Ultimately, by flexibly adapting the two processes on the continuous annealing equipment, materials can achieve excellent DC bias characteristics, low hysteresis loss, and stable permeability frequency characteristics through tension annealing, while also obtaining superior mechanical toughness through tension stress cycling. This significantly improves product quality stability, meeting the requirements of high-end fields such as high-frequency electronic devices and new energy vehicle drive modules, further expanding the application range of amorphous and nanocrystalline alloy materials. Furthermore, in terms of control precision, this invention utilizes hysteresis brake rollers and tension sensors to replace the traditional coarse tension control structure, combined with real-time feedback and dynamic correction mechanisms to reduce tension fluctuations and improve tension control accuracy.

[0012] As an improvement, the tube furnace heating unit includes a glass tube body and two port glass covers. The two port glass covers are detachably connected to the front and rear ends of the glass tube body, and each port glass cover has a first through hole. With this structure, the detachable port glass cover structure and the first through hole for material to pass through greatly facilitates the maintenance and cleaning of the equipment. Operators can easily remove the port glass covers to clean or replace parts inside the tube furnace, while ensuring the smoothness and sealing of the material conveying path, which helps to maintain the stability of the protective atmosphere inside the furnace.

[0013] As an improvement, the front and rear ends of the glass tube are respectively connected to a feed end heat insulation plug and a discharge end heat insulation plug. Both the feed end heat insulation plug and the discharge end heat insulation plug are provided with a second through hole arranged in the front-rear direction for amorphous and nanocrystalline alloy materials to pass through. With this structure, the feed end heat insulation plug and the discharge end heat insulation plug can effectively prevent a large amount of heat from being lost from the inside of the tube furnace heating unit from both ends, which significantly improves the temperature uniformity and stability of the tube furnace heating unit. This provides a more uniform annealing environment for the material, thereby ensuring the uniformity and consistency of the magnetic properties of the material and improving product quality.

[0014] As an improvement, the heat insulation plug at the discharge end is provided with a through groove that runs through the front end face of the heat insulation plug at the discharge end. The outer wall of the glass tube body is connected to an inlet pipe for introducing annealing protective gas. The inlet pipe is connected to the inner cavity of the glass tube body through the through groove. This structure allows the protective gas to flow into the heating area more smoothly and directly, reducing airflow resistance and turbulence. This is beneficial for quickly establishing and maintaining a stable and uniform protective atmosphere in the tube furnace heating unit, further preventing the material from oxidizing during high-temperature annealing.

[0015] As an improvement, both the feed end heat shield and the discharge end heat shield are made of alumina. With this structure, alumina has excellent high temperature resistance, low thermal conductivity and good high temperature structural strength. Using alumina as the material for the feed end heat shield and the discharge end heat shield can work stably for a long time in a high temperature annealing environment, give full play to its heat insulation performance, ensure temperature field uniformity, and at the same time its wear resistance also ensures the reliability of the material during long-term operation.

[0016] As an improvement, the outer wall of the tubular furnace heating unit is connected to an inlet pipe for introducing annealing protective gas, and a gas flow meter is connected to the inlet pipe. With this structure, by connecting the gas flow meter to the inlet pipe, precise monitoring and quantitative control of the flow rate of the protective gas introduced into the tubular furnace heating unit can be achieved. This overcomes the defects of the crude management that relies on manual adjustment of the protective gas and has unstable concentration. Operators can accurately set and maintain the gas flow rate according to process requirements, ensuring the stability of the inert protective atmosphere during annealing, effectively avoiding material oxidation or performance inconsistency caused by atmosphere fluctuations, and improving process repeatability and product yield.

[0017] As an improvement, the vibration pulse controller also includes a second base and a third base, both of which are connected to the frame. The drive unit is connected to the second base, and the two fixed idler wheels are rotatably connected to the third base.

[0018] As an improvement, the vibration pulse controller also includes a side plate and a guide rail pair. The side plate is vertically connected to the second base, and the guide rail pair is vertically connected to the side plate. The first base is connected to the guide rail pair and slidably mounted with the side plate. With this structure, the vertical movement of the first base is guided by the side plate and guide rail pair, providing high-precision linear guidance for the reciprocating motion of the movable pulley. The guide rail pair can effectively eliminate lateral swaying and jamming during the movement, ensuring that the movable pulley runs smoothly along the vertical trajectory. This directly improves the control accuracy and stability of pulse tension fluctuations, making the dynamic tensile stress cycle applied to the material more uniform and controllable, thereby more effectively optimizing the internal stress and microstructure of the material.

[0019] As an improvement, the driving component is a telescopic motor with a stroke adjustment range of 0-50mm, a reciprocating frequency of 1-120Hz, and a maximum thrust of 30N. This structure clarifies the key motion parameter range for achieving effective pulsed tensile stress cycling. The 0-50mm stroke range is sufficient to induce significant periodic length changes in the material to trigger effective tension fluctuations while avoiding overstretching. The 1-120Hz frequency range covers the cyclic processing requirements from low to high frequencies, thereby precisely controlling the amplitude and frequency of the material tension pulse fluctuations. The maximum thrust of 30N is 1 / 5 of the fracture tensile force of amorphous and nanocrystalline alloy materials, ensuring the effective function of dynamic tensile stress cycling while preventing excessive stretching and fracture of the material, thus ensuring processing safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the vibration pulse controller part in this invention.

[0022] Figure 3 This is a schematic diagram showing the position of the movable pulley in its initial state in this invention.

[0023] Figure 4 This is a schematic diagram showing the position of the movable pulley in the raised state in this invention.

[0024] Figure 5 This is a schematic diagram of the structure of the tubular furnace heating unit in this invention.

[0025] Reference numerals: 1. Hysteresis brake roller assembly; 2. Tension sensor; 3. Vibration pulse controller; 31. First base; 32. Drive component; 33. Movable pulley; 34. Fixed idler wheel; 35. Second base; 36. Third base; 37. Side plate; 38. Guide rail pair; 4. Tube furnace heating unit; 41. Glass tube body; 42. Port glass cover; 5. Stepper motor roller assembly; 6. First through hole; 7. Inlet heat insulation plug; 8. Outlet heat insulation plug; 9. Second through hole; 10. Through groove; 11. Air inlet pipe; 12. Gas flow meter; 13. Unpowered transmission idler wheel assembly; 14. Main control equipment. Detailed Implementation

[0026] The following is a detailed description of the continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials according to the present invention, with reference to the accompanying drawings.

[0027] like Figures 1 to 5 As shown, a continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials includes a frame and a main control device 14. The frame is provided with a hysteresis brake roller group 1, a tension sensor 2, a vibration pulse controller 3, a tube furnace heating unit 4, and a stepper motor roller group 5 in sequence from front to back. The direction from front to back is along the continuous transmission path of the amorphous and nanocrystalline alloy materials, and the material is transmitted horizontally from front to back.

[0028] like Figure 2 As shown, the vibration pulse controller 3 includes a first base 31, a drive member 32, a movable pulley 33, and two fixed idler wheels 34. The two fixed idler wheels 34 are set at the same height in the front-to-back direction. The drive member 32 is connected to and drives the first base 31 to move in the up-down direction. The movable pulley 33 is rotatably connected to the first base 31 and located between the two fixed idler wheels 34.

[0029] Specifically, continue to refer to Figure 2 The vibration pulse controller 3 also includes a second base 35, a third base 36, a side plate 37, and a guide rail pair 38. The second base 35 and the third base 36 are both connected to the frame. The drive unit 32 is connected to the second base 35. The two fixed idler wheels 34 are rotatably connected to the third base 36. The side plate 37 is vertically connected to the second base 35. The guide rail pair 38 is vertically connected to the side plate 37. The first base 31 is connected to the guide rail pair 38, thereby realizing the sliding arrangement of the first base 31 and the side plate 37. The drive unit 32 is a telescopic motor.

[0030] like Figure 5As shown, the tubular furnace heating unit 4 has first through holes 6 at both ends for amorphous and nanocrystalline alloy materials to pass through; the hysteresis brake roller group 1, tension sensor 2, vibration pulse controller 3 and stepper motor roller group 5 are all electrically connected to the main control equipment 14 to realize signal interaction, parameter linkage and closed-loop control, forming an integrated operation system of "continuous annealing + pulse tension stress cycle".

[0031] The hysteresis brake roller group 1, as a passive unwinding component, serves both as a stable unwinding device for the material to be annealed and as an initial tension application device. The main control device 14 adjusts the excitation current to control the output torque, thereby achieving precise tension control. The tension sensor 2 is used to collect the actual tension data during the continuous material transfer process in real time, providing feedback for the main control device 14 to monitor the tension status, adjust the torque of the hysteresis brake roller group 1, and the pulse parameters of the vibration pulse controller 3. The vibration pulse controller 3 is the core execution unit for realizing continuous pulse tension. The main control device 14 adjusts its pulse frequency, amplitude, and action period to make the material tension fluctuate in a pulsed cycle within a set range, thereby achieving the synchronization of dynamic tensile stress cycle and continuous annealing.

[0032] Tubular furnace heating unit 4 is the core unit for continuous annealing of materials. Its furnace body adopts a quartz glass tube structure. Specifically, as follows: Figure 5 As shown, the outer wall of the tubular furnace heating unit 4 is connected to an inlet pipe 11 for introducing annealing protective gas. A gas flow meter 12 is connected to the inlet pipe 11, which is connected to an argon gas source. The gas flow meter 12 precisely controls the argon gas flow rate, providing a stable inert protective environment for continuous annealing of materials. The stepper motor roller group 5 serves as an active winding component and is signal-connected to the main control equipment 14. By receiving instructions from the main control equipment 14, it adjusts the rotation speed to control the continuous material transmission speed. At the same time, it works with the hysteresis brake roller group 1 to form a tension balance in material transmission, ensuring that the annealing and pulse tension stress cycle process is carried out continuously and stably.

[0033] In addition, such as Figure 1 As shown, a non-powered transmission idler wheel group 13 is also provided between the tubular furnace heating unit 4 and the stepper motor roller group 5.

[0034] like Figure 5As shown, the tubular furnace heating unit 4 includes a glass tube body 41 and two port glass covers 42. The two port glass covers 42 are detachably connected to the front and rear ends of the glass tube body 41. Each port glass cover 42 is provided with a first through hole 6. The front and rear ends of the glass tube body 41 are respectively connected to a feed end heat insulation plug 7 and a discharge end heat insulation plug 8. Both the feed end heat insulation plug 7 and the discharge end heat insulation plug 8 are provided with a second through hole 9 arranged in the front and rear direction for amorphous and nanocrystalline alloy materials to pass through. The discharge end heat insulation plug 8 is provided with a through groove 10, which penetrates the front end face of the discharge end heat insulation plug 8. The air inlet pipe 11 is located in the part of the glass tube body 41 where the discharge end heat insulation plug 8 is provided. The air inlet pipe 11 is connected to the inner cavity of the glass tube body 41 through the through groove 10.

[0035] When the device only needs to perform continuous tension annealing, the drive component 32 does not move, and the movable pulley 33 remains stationary. The device relies entirely on the cooperation of the hysteresis brake roller group 1 and the stepper motor roller group 5 of the continuous annealing equipment to accurately complete the continuous annealing operation under constant tension, ensuring the stability of the traditional process. When it is necessary to perform tensile stress cycling on the conveyed material, the vibration pulse controller 3 can be activated. The drive component 32 drives the movable pulley 33 to perform periodic reciprocating motion, applying pulsed dynamic tension fluctuations to the continuously conveyed material to complete the tensile stress cycling process. This breaks through the bottleneck of traditional tensile stress cycling relying on static batch processing, allowing pulsed tensile stress cycling to be carried out simultaneously with continuous material conveying and continuous annealing, significantly improving processing efficiency. It can perfectly match the batch production capacity of the continuous annealing equipment and meet the needs of large-scale industrialization. The two processes can share the conveying, temperature control, and tension control systems of the continuous annealing equipment, eliminating the need to purchase dedicated tensile stress cycling equipment as in the traditional mode, greatly reducing the initial investment in equipment. This invention eliminates the need for material switching and debugging between two types of equipment, simplifying the production process and improving efficiency. Ultimately, by flexibly adapting the two processes on a continuous annealing device, the material can achieve excellent DC bias characteristics, low hysteresis loss, and stable permeability frequency characteristics through tension annealing, and also obtain excellent mechanical toughness through tensile stress cycling. This significantly improves product quality stability, meeting the requirements of high-end fields such as high-frequency electronic devices and new energy vehicle drive modules, further expanding the application range of amorphous and nanocrystalline alloy materials. In terms of control precision, this invention uses a hysteresis brake roller group 1 and a tension sensor 2 to replace the traditional coarse tension control structure, combined with a real-time feedback and dynamic correction mechanism to reduce tension fluctuations and improve tension control precision. At the same time, the tubular furnace heating unit 4 of the continuous annealing device is optimized, and an open heat insulation plug is added to improve temperature field uniformity. Combined with a gas flow meter 12, the protective gas is precisely controlled, ensuring the stability of material performance during single-process operation from the source.

[0036] The core value of this invention lies in functional integration and flexible switching: the two processes share the same conveying and temperature control system, allowing for flexible switching without rebuilding the production line, which simplifies the process, improves equipment utilization, and avoids parameter fluctuations; the magnetic domain orientation of tension annealing and the stress release function of stress cycling work together to give the material both excellent soft magnetic properties and processing toughness, reducing subsequent processing losses.

[0037] Specifically, as the core actuator of the passive unwinding end, the hysteresis brake roller assembly 1 can achieve high-precision control within the range of 10%-100% of the rated torque. First, the target tension F is determined based on the material processing requirements. Then, combined with the radius R of the brake roller of the hysteresis brake roller assembly 1, the corresponding torque parameter is calculated using the tension-torque conversion formula T=F×R (where T is the target torque). This torque parameter is then converted into a precise excitation current command and sent to the drive module of the hysteresis brake roller assembly 1. Upon receiving the command, the hysteresis brake roller assembly 1 generates a stable torque using the hysteresis effect. This torque acts on the unwinding roller to form a reverse resistance, balancing the traction force of the stepper motor roller assembly 5 at the active winding end. Combined with the stepper motor's uniform speed drive of the material, this ultimately transforms into the basic constant tension required by the material. It is worth noting that the torque output of the hysteresis brake roller assembly 1 is essentially unaffected by the slip speed, enabling long-term continuous and stable slip, providing sustained and constant torque support for the unwinding process. To further improve the tension control accuracy, a tension sensor 2 is introduced to construct a closed-loop control system: the tension sensor 2 collects the actual tension data of the material during the transmission process in real time and synchronously feeds the signal back to the main control device 14. When the main control device 14 detects that the deviation between the actual tension and the set value exceeds 0.1N, it immediately starts the fine-tuning program. By changing the magnitude of the excitation current (using the linear correlation characteristics between current and torque), it indirectly corrects the output torque of the hysteresis brake roller group 1, thereby controlling the material tension deviation within the range of ±0.05N, ensuring that the tension is always within the stable range required by the process during continuous annealing.

[0038] The vibration pulse controller 3 is used to apply pulsed tension to amorphous and nanocrystalline alloy materials during continuous conveying, thereby achieving dynamic cyclic control of the material's tensile stress. In terms of mechanical structure design, the vibration pulse controller 3 adopts a three-point triangular distribution layout: the front fixed idler wheel 34, the middle movable pulley 33, and the rear fixed idler wheel 34 are arranged in a triangle, forming a stable material support and tension adjustment architecture; the front and rear fixed idler wheels 34 are rigidly fixed by bearing seats, providing a stable reference; the travel adjustment range of the telescopic motor is 0-50mm, the reciprocating frequency supports stepless adjustment from 1-120Hz, and the maximum thrust is 30N. During operation, it can drive the movable pulley 33 to perform high-frequency up-and-down reciprocating motion, thereby precisely controlling the pulse fluctuation amplitude and frequency of the material tension.

[0039] The pulse tension control process is coordinated with the continuous material conveying: First, the hysteresis brake roller group 1 applies a basic constant tension (e.g., 20N) to the material, keeping it taut and maintaining continuous conveying; for example... Figure 3 As shown, at this time, the contact surface between the movable pulley 33 and the material, and the contact surfaces between the fixed idler wheels 34 on both sides and the material, are at the same horizontal height. The material is conveyed along a horizontal path and is under basic tension. Then, the telescopic motor is started. When the movable pulley 33 moves upward, as shown... Figure 4 As shown, the effective transport path of the material is stretched and tensile strain is generated, while the material tension maintains the basic tension (e.g., 20N); when the movable pulley 33 returns to its original position downwards, it returns to the state shown. Figure 3 As shown, the effective material transport path is shortened, the tightness is reduced, and the tension smoothly drops to a set lower limit (e.g., 10N). Through the periodic reciprocating motion of the telescopic motor, the material tension can form a stable sinusoidal pulse fluctuation in the 10-20N range, ultimately constructing a uniform and controllable dynamic tensile stress field for the material during continuous annealing, achieving the process goal of continuous pulse tension heat treatment for amorphous and nanocrystalline alloy materials.

[0040] The inlet heat insulation plug 7 and outlet heat insulation plug 8 in the tubular furnace heating unit 4 are both made of alumina. The size of the second through hole 9 is precisely matched with the material to ensure smooth transmission. At the same time, the heat insulation plug can significantly block heat leakage from the furnace, reducing the causes of temperature fluctuations at the source and building a constant temperature foundation for the heating zone. It should be noted that the middle area of ​​this device is the core heating zone of the tubular furnace. Its outer side is equipped with the furnace body's own insulation structure (such as a ceramic fiber insulation layer), which can maintain the temperature stability of the heating zone itself. Therefore, there is no need to add additional insulation components. This structured thermal field design provides continuous and stable temperature conditions for the directional alignment of material magnetic domains and stress release, ensuring that the material in different locations receives consistent heat treatment results.

[0041] To prevent oxidation during material annealing, the inlet pipe 11 connects the gas flow meter 12 to the inert gas cylinder. The gas flow meter 12 is a rotor flow meter, establishing a stable control system of "gas source - visual metering - in-furnace delivery". This device uses an industrial-grade rotor flow meter, with flow rate adjusted via a mechanical knob, eliminating the need for electronic control and making operation intuitive and convenient. The rotor flow meter's scale panel directly displays the flow rate value, allowing operators to accurately determine the real-time flow rate via the corresponding scale on the float. The control logic is as follows: Before annealing, the gas cylinder valve is slowly opened, and then the valve opening is adjusted using the rotor flow meter's built-in mechanical knob to maximize the flow rate for rapid replacement of air in the furnace. After replacement, the mechanical knob is rotated again to adjust the flow rate to the required process value (e.g., 3-5 L / min). No additional control commands are required throughout the annealing process; precise flow rate adjustment and stable maintenance are achieved solely through the mechanical structure, providing a continuous and reliable inert protective atmosphere for the material. The equipment is low-cost and easy to maintain, making it particularly suitable for the process scenarios of small and medium-sized enterprises.

[0042] The material conveying speed is directly controlled by the main control device 14, which controls the rotational speed of the stepper motor roller group 5. The core principle is to precisely match the annealing process requirements through a "rotational speed - linear velocity" conversion. The main control device 14 can directly adjust the target rotational speed of the take-up roller to regulate the material conveying speed (maximum speed 300 rpm). Combined with the fixed parameters of the take-up roller in this device (radius 31 mm, diameter 62 mm), the system automatically calls the linear velocity conversion formula V = π × D × n / 60 (where V is the material linear velocity, D is the take-up roller diameter, and n is the take-up roller rotational speed) to complete the parameter conversion. Taking a take-up roller rotational speed of 8 rpm as an example, substituting the diameter of 0.062 m, we can calculate that the material linear velocity is π × 0.062 m × 8 / 60 ≈ 0.026 m / s, or 1.56 m / min, ensuring that the speed parameters are precisely matched with the annealing process.

[0043] This device breaks through the limitations of traditional static tensile stress cycling, simultaneously applying continuous pulse tensile stress to continuously conveyed strips, wires, and other continuous materials, achieving integrated batch processing of "continuous annealing-pulse tensile stress cycling." The device is compact in structure and simple to operate, adapting to existing production lines without complex modifications. It can seamlessly connect with ton-scale strip and wire winding systems, ensuring the continuity of subsequent processes. Simultaneous hardness control enables integrated pre-processing before stamping, further streamlining the process and demonstrating clear feasibility for large-scale deployment. In summary, this device achieves functional integration and process synergy, ensuring stable continuous tension annealing of materials while simultaneously applying pulse tensile stress cycling to continuously conveyed materials, providing an efficient solution for optimizing the comprehensive performance and mass production of amorphous and nanocrystalline alloy materials.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A continuous pulse tension heat treatment device for amorphous and nanocrystalline alloy materials, characterized in that, It includes a frame and a main control device (14), on which a hysteresis brake roller group (1), a tension sensor (2), a vibration pulse controller (3), a tubular furnace heating unit (4) and a stepper motor roller group (5) are arranged sequentially from front to back. The vibration pulse controller (3) includes a first base (31), a driving member (32), a movable pulley (33), and two fixed idler wheels (34). The two fixed idler wheels (34) are set at the same height in the front-back direction. The driving member (32) is connected to and drives the first base (31) to move in the up-down direction. The movable pulley (33) is rotatably connected to the first base (31) and located between the two fixed idler wheels (34). The tubular furnace heating unit (4) is provided with first through holes (6) at both ends for amorphous and nanocrystalline alloy materials to pass through. The hysteresis brake roller assembly (1), tension sensor (2), vibration pulse controller (3), and stepper motor roller assembly (5) are all electrically connected to the main control device (14).

2. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 1, characterized in that, The tubular furnace heating unit (4) includes a glass tube body (41) and two port glass covers (42). The two port glass covers (42) are detachably connected to the front and rear ends of the glass tube body (41), and each port glass cover (42) is provided with a first through hole (6).

3. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 2, characterized in that, The glass tube body (41) has a heat insulation plug (7) at the front and rear ends and a heat insulation plug (8) at the discharge end, respectively. Both the heat insulation plug (7) at the front and the heat insulation plug (8) at the discharge end are provided with a second through hole (9) arranged in the front and rear direction for amorphous and nanocrystalline alloy materials to pass through.

4. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 3, characterized in that, The heat insulation plug (8) at the discharge end is provided with a through groove (10), which penetrates the front end face of the heat insulation plug (8) at the discharge end. The outer wall of the glass tube body (41) is connected to an air inlet pipe (11) for introducing annealing protective gas. The air inlet pipe (11) is connected to the inner cavity of the glass tube body (41) through the through groove (10).

5. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 3, characterized in that, Both the feed end heat insulation plug (7) and the discharge end heat insulation plug (8) are made of alumina material.

6. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 1, characterized in that, The outer wall of the tubular furnace heating unit (4) is connected to an inlet pipe (11) for introducing annealing protective gas, and a gas flow meter (12) is connected to the inlet pipe (11).

7. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 1, characterized in that, The vibration pulse controller (3) further includes a second base (35) and a third base (36), both of which are connected to the frame. The drive unit (32) is connected to the second base (35), and both fixed idler wheels (34) are rotatably connected to the third base (36).

8. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 7, characterized in that, The vibration pulse controller (3) also includes a side plate (37) and a guide rail pair (38). The side plate (37) is connected vertically to the second base (35), and the guide rail pair (38) is connected vertically to the side plate (37). The first base (31) is connected to the guide rail pair (38) and is slidably disposed with the side plate (37).

9. The continuous pulse tension heat treatment apparatus for amorphous and nanocrystalline alloy materials according to claim 1, characterized in that, The driving component (32) is a telescopic motor with a stroke adjustment range of 0-50mm, a reciprocating frequency of 1-120Hz, and a maximum thrust of 30N.

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