A magnetic field heat treatment device

Abstract

The utility model provides a kind of magnetic field heat treatment device, belong to material heat treatment equipment technical field.It solves the problem of temperature loss in advance when sample is quenched in prior art.The magnetic field heat treatment device includes: furnace body, one end of the upper end, lower end of the furnace body is open;Magnetic field generating mechanism is arranged in the periphery of furnace body;Cooling chamber, one end of cooling chamber is open, and the open end is communicated with the open end of furnace body;Driving mechanism is connected in cooling chamber, and the other end extends to furnace body;Sample stage is connected in the other end of driving mechanism;Valve is connected between furnace body and cooling chamber, for controlling the on-off state of the open end of both.This utility model has the advantages of avoiding sample heat loss in advance and suffering pollution when rare earth magnetic material is quenched in magnetic field heat treatment, and improving the uniformity of multiple sample temperature field.

Description

TECHNICAL FIELD

[0001] The utility model relates to material heat treatment equipment technical field, concretely to a kind of magnetic field heat treatment device of parallel processing of rare earth magnetic material multiple samples. BACKGROUND

[0002] Rare earth functional materials have excellent magnetic, optical, electrical, catalytic and other physical and chemical properties, and have become indispensable key materials in many fields such as modern industry, electronic technology, energy conservation and environmental protection, national defense and military industry. Among them, rare earth magnetic materials are the most widely used. According to the function, it can be roughly divided into rare earth permanent magnetic materials, rare earth magnetostrictive materials, rare earth magnetic refrigeration materials and rare earth soft magnetic wave-absorbing materials.

[0003] As a key modification method in the field of materials, magnetic field heat treatment technology can precisely control the microstructure of materials by heating, holding and cooling the whole process in a magnetic field environment, significantly improving their magnetic properties, mechanical properties and corrosion resistance, especially for magnetic materials. For rare earth magnetic materials, magnetic field heat treatment is usually carried out in a high-temperature, high-vacuum or inert gas protection environment. The high-temperature structure needs to be quenched to retain, and during the transfer of high-temperature samples, heat is easily lost in advance, making it difficult to obtain the target microstructure and performance. In addition, high-temperature rare earth magnetic materials will react violently when directly contacted with water or oil quenching medium, resulting in serious pollution and loss. Therefore, in the research and development process of new rare earth magnetic materials, the existing magnetic field heat treatment equipment still has many technical bottlenecks, and it is difficult to meet the efficient, safe and high-quality material processing needs. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present utility model is to provide a magnetic field heat treatment device: when quenching rare earth magnetic materials in a magnetic field, not only can the sample heat be lost in advance and avoid contamination, but also can improve the uniformity of the temperature field of multiple samples.

[0005] The utility model can be realized by the following technical solutions:

[0006] A magnetic field heat treatment device, comprising:

[0007] The furnace body has one end open at the upper end and the lower end;

[0008] The magnetic field generating mechanism is arranged around the furnace body;

[0009] The cooling chamber has one end open, and the open end is in communication with the open end of the furnace body;

[0010] The driving mechanism is connected in the cooling chamber and extends to the furnace body at the other end;

[0011] A sample stage is connected to the other end of the driving mechanism;

[0012] A valve is connected between the furnace body and the cooling chamber for controlling the opening and closing of the two open ends.

[0013] In the above-mentioned magnetic field heat treatment device, further comprising an air inlet valve and an inert gas storage device, one side of the cooling chamber is connected to the air outlet of the inert gas storage device through a pipeline, and the air inlet valve is arranged in the pipeline.

[0014] In the above-mentioned magnetic field heat treatment device, further comprising an exhaust valve and an air extraction device; the exhaust valve is arranged on the side of the cooling chamber opposite to the air inlet valve, and the air extraction device is connected to the cooling chamber through a pipeline, and the exhaust valve is arranged in the pipeline connecting the cooling chamber and the air extraction device.

[0015] In the above-mentioned magnetic field heat treatment device, further comprising a pressure limiting valve arranged at the top of the cooling chamber.

[0016] In the above-mentioned magnetic field heat treatment device, the sample stage is a multi-layer structure, each layer is provided with positioning grooves arranged in an array, and a through-hole baffle is arranged around.

[0017] In the above-mentioned magnetic field heat treatment device, further comprising a thermocouple installed inside the sample stage.

[0018] In the above-mentioned magnetic field heat treatment device, the driving mechanism comprises a lifting driving motor, a lead screw, two slide rails, a cross beam, a rotary driving motor and a rod, the two slide rails are respectively fixed vertically to the opposite inner sides of the cooling chamber, the cross beam is slidably connected to the two slide rails through slide blocks at both ends, the lifting driving motor is rigidly connected to the top of the cooling chamber, the output end of the lifting driving motor is connected to one end of the lead screw, the other end of the lead screw is provided with a thread, the other end of the lead screw is threadedly connected to the cross beam, and the cross beam is stably lifted along the slide rails by controlling the rotation of the lead screw; at the same time, the rotary driving motor is fixedly installed on the cross beam, the output end of the rotary driving motor is fixedly connected to one end of the rod, the rod extends vertically to the furnace body, and the other end of the rod is fixedly connected to the sample stage.

[0019] In the above-mentioned magnetic field heat treatment device, the furnace body comprises a furnace tube, a heating body, an outer shell, and a cooling device, the outer shell is a cavity with an open end, one end of the furnace tube is open and coaxially fixed with the outer shell, the heating body is arranged between the furnace tube and the outer shell, and the cooling device comprises a temperature control and a cooling liquid, the cooling liquid circulates in the outer shell to control the temperature of the outer shell to be not higher than 50℃.

[0020] In the above-mentioned magnetic field heat treatment device, an observation window is arranged on the side wall of the cooling chamber.

[0021] In the above-mentioned magnetic field heat treatment device, the cooling chamber is provided with a material loading and unloading door.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] 1. Precisely control the quenching temperature to ensure repeatable processing.

[0024] This device employs a structural design of "coaxial connection between furnace body and cooling chamber + valve isolation," combined with a drive mechanism to directly transfer the sample stage between the furnace body and cooling chamber. This allows for the switching of samples from high-temperature heating to rapid cooling without moving the furnace tubes. During the transfer process, the sample is only briefly exposed to the space connecting the two chambers, and the valves can quickly isolate the temperature exchange between the furnace body and cooling chamber, effectively preventing premature heat loss from the sample, precisely controlling the quenching initiation temperature, and ensuring that the material phase transformation process conforms to the preset process.

[0025] 2. Achieve parallel and uniform cooling of multiple samples to ensure stable sample performance.

[0026] During the gas quenching process, the sample stage rotates at a certain speed, ensuring that all arrayed samples are in contact with the gas coolant. This guarantees that the cooling rate of each sample is comparable, ultimately resulting in a uniform and stable target microstructure and properties, significantly improving sample processing efficiency and quality stability.

[0027] 3. Avoid sudden heating and cooling of furnace tubes to extend equipment lifespan.

[0028] In this device, the furnace tube is fixed inside the furnace shell, and only the sample stage moves between the furnace body and the cooling chamber with the drive mechanism. The furnace tube is always in a relatively stable temperature environment and does not need to withstand drastic temperature changes, which fundamentally eliminates the risk of cracking and deformation of the furnace tube due to thermal stress. Attached Figure Description

[0029] Figure 1 A schematic diagram of the overall structure of a magnetic field heat treatment device provided by this utility model.

[0030] The component names corresponding to each number in the diagram are as follows:

[0031] 1. Furnace body; 11. Furnace tube; 12. Heating element; 13. Outer shell; 14. Cooling device; 2. Magnetic field generating mechanism; 3. Cooling chamber; 31. Observation window; 4. Drive mechanism; 41. Lifting drive motor; 42. Slide rail; 43. Crossbeam; 44. Rotary drive motor; 45. Rod; 46. Lead screw; 5. Sample stage; 51. Thermocouple; 6. Valve; 7. Inlet valve; 8. Inert gas storage device; 9. Exhaust valve; 91. Vacuuming equipment; 10. Pressure limiting valve. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] like Figure 1 As shown, the present invention provides a magnetic field heat treatment device, comprising:

[0035] Furnace body 1, with one of its upper or lower ends open; magnetic field generating mechanism 2, disposed around the periphery of furnace body 1 to provide a magnetic field; cooling chamber 3, with one end open and connected to the opening end of furnace body 1; driving mechanism 4, connected inside cooling chamber 3, with the other end extending into furnace body 1; sample stage 5, connected to the other end of driving mechanism 4; valve 6, connected between furnace body 1 and cooling chamber 3, used to control the on / off state of the opening ends of both.

[0036] Preferably, this device forms an integrated "heating-magnetization-cooling" processing system through the coordinated design of furnace body 1, magnetic field generating mechanism 2, cooling chamber 3, driving mechanism 4, sample stage 5, and valve 6: furnace body 1 and cooling chamber 3 are coaxially connected, and valve 6 is used to achieve precise isolation and connection between the two chambers, avoiding heat loss caused by the movement of furnace tubes in traditional equipment; driving mechanism 4 can directly drive sample stage 5 to move quickly between furnace body 1 and cooling chamber 3, ensuring that the sample quenching start temperature is accurately controllable; magnetic field generating mechanism 2 is set around furnace body 1, which can provide a stable magnetic field environment during sample heating, ensuring the microstructure modification effect of magnetic materials.

[0037] Preferably, this device adds a pipeline connection structure between the cooling chamber 3 and the inert gas storage device 8, and sets the inlet valve 7 inside the pipeline to form a closed and controllable inert gas delivery path. The exhaust valve 9 is set on the side of the cooling chamber 3 opposite to the inlet valve 7, forming a complete atmosphere control system together with the inlet valve 7 and the inert gas storage device 8. A pre-set interface on one side of the cooling chamber 3 is sealed to one end of the pipeline, and the other end of the pipeline is connected to the outlet of the inert gas storage device 8. The inlet valve 7 is embedded in the middle section of the pipeline, which can precisely control the gas on / off and flow rate. When the sample enters the cooling chamber 3 for quenching, opening the inlet valve 7 can stably introduce gas from the inert gas storage device 8, forming a directional airflow with the exhaust valve 9 on the opposite side of the cooling chamber 3, quickly replacing the gas in the cooling chamber. The cooling chamber is connected to a vacuum device 91 through a pipeline, and the exhaust valve 9 is set inside the pipeline. By adjusting the opening of the inlet valve 7, the gas flow rate can be controlled, which can ensure the atmosphere protection effect and avoid gas waste.

[0038] Preferably, the device further includes a pressure relief valve 10, which is fixed to the top of the cooling chamber 3 and communicates with the interior of the cooling chamber 3 to form a pressure protection structure. When inert gas is introduced through the inlet valve 7 or the sample dissipates heat, causing the pressure inside the chamber to rise to a set threshold, the pressure relief valve 10 will automatically open to release pressure, preventing the cooling chamber 3 from being damaged due to pressure overload. In conjunction with the inlet valve 7 and the exhaust valve 9, it can maintain stable pressure inside the chamber, ensuring both the atmosphere protection effect and improving the operational safety of the device.

[0039] Preferably, the sample stage 5 of this device is designed with a multi-layer structure, with each layer having an array of positioning slots and through-hole baffles around its perimeter. A thermocouple 51 is installed inside the sample stage 5. This allows for stable support of block and columnar samples of different sizes. Multiple positioning slots within the platform allow for the simultaneous placement of multiple samples, preventing displacement during transfer or rotation. The through-holes around the perimeter break the sealed nature of the sample stage 5, allowing heat from the furnace 1 to evenly penetrate the sample surface and enabling the inert gas in the cooling chamber 3 to flow smoothly through the sample, achieving comprehensive heating and cooling. The internally installed thermocouple 51 is close to the sample, capturing the sample temperature in real time, providing more accurate data compared to external temperature measurement methods. From an advantage perspective, the through-hole design solves the problem of uneven heating and cooling in traditional closed sample stages, ensuring consistent performance across all parts of the sample. The built-in design of the thermocouple 51 provides real-time data support for controlling the quenching initiation temperature, preventing temperature misjudgments from affecting the material phase transformation effect, further improving the stability of sample processing quality, and making it suitable for magnetic alloy processing scenarios with high temperature accuracy requirements.

[0040] Preferably, the drive mechanism 4 of this device is composed of a lifting drive motor 41, a lead screw 46, two slide rails 42, a crossbeam 43, a rotary drive motor 44, and a rod 45. The structural design is highly compatible with the functional requirements: the two slide rails 42 are respectively vertically fixed to the opposite inner sides of the cooling chamber 3, forming a symmetrical and stable guide structure. The two ends of the crossbeam 43 are slidably connected to the slide rails 42 through sliders to ensure no deviation during the lifting process. The lifting drive motor 41 is rigidly connected to the top of the cooling chamber 3. The output end of the lifting drive motor 41 is connected to one end of the lead screw 46. The other end of the lead screw 46 is threaded and threaded to the crossbeam 43. By precisely controlling the rotation direction and speed of the lead screw 46, the crossbeam 43 can be driven to rise and fall smoothly along the slide rails 42, thereby driving the sample stage 5 to be precisely transferred between the furnace body 1 and the cooling chamber 3. Meanwhile, the rotary drive motor 44 is fixedly mounted on the crossbeam 43, and its output end is rigidly fixed to one end of the rod 45. The rod 45 extends vertically towards the furnace body 1 and is fixedly connected to the sample stage 5. Starting the rotary drive motor 44 will drive the sample stage 5 to rotate at a uniform speed. This design achieves rapid and precise lifting and transfer of the sample stage 5 through the cooperation of the lifting drive motor 41 and the lead screw 46, shortening the heat loss time. At the same time, the rotary drive motor 44 allows the sample stage 5 to rotate continuously during the heating and cooling process. Combined with the through holes and array positioning grooves of the sample stage 5, it ensures that multiple samples are heated, magnetized, and contacted with inert gas evenly, further ensuring the consistency of the performance of the processed samples.

[0041] Preferably, this device incorporates an observation window 31 embedded in the side wall of the cooling chamber 3. The observation window 31 is made of high-temperature resistant transparent quartz glass and is sealed to the side wall of the cooling chamber 3. Operators can monitor the sample cooling status in real time through the observation window 31 without opening the cooling chamber 3, thus avoiding disruption of the inert gas atmosphere. Simultaneously, it allows for timely detection of sample abnormalities, ensuring controllable processing and improving operational convenience and safety. Furthermore, a vacuum gauge is installed at the top of the cooling chamber 3 to monitor the vacuum level within it. The cooling chamber also features a material handling door; this door can be opened when materials need to be handled and closed during processing to ensure the airtightness of the cooling chamber.

[0042] Preferably, the furnace body 1 of this device includes an outer shell 13, a furnace tube 11, a heating element 12, and a cooling device 14, adapted to the high-temperature treatment requirements of rare earth magnetic materials: the outer shell 13 is a cavity with one open end, providing stable support for the furnace body 1; the furnace tube 11 has one open end and is coaxially fixed with the outer shell 13, forming an independent heating space, ensuring that the magnetic field can act uniformly on the internal sample, while avoiding direct contact between the sample and external components to prevent contamination. The heating element 12 is located between the furnace tube 11 and the outer shell 13, which can rapidly heat up and transfer heat to the furnace tube 11, meeting the high-temperature heat treatment requirements above 500℃. The cooling device 14 is equipped with a temperature control and circulating coolant. The coolant continuously flows inside the outer shell 13. Combined with real-time monitoring and control by the temperature control, the temperature of the outer shell 13 can be stably controlled at no higher than 50℃, which not only avoids the outer shell overheating from affecting the stability of the magnetic field generating mechanism 2, but also prevents high temperature from damaging the surrounding components of the furnace body, ensuring long-term stable operation of the equipment.

[0043] It is worth mentioning that the furnace body 1 and the cooling chamber 3 are coaxially connected, and with the help of valve 6, the two chambers can be precisely switched on and off, ensuring the independent and stable heating and cooling environments. The drive mechanism 4 can drive the sample stage 5 to be quickly transferred between the furnace body 1 and the cooling chamber 3, preventing the sample from losing temperature prematurely during the transfer process and ensuring the accuracy of the quenching start temperature. The inlet valve 7, the exhaust valve 9, and the inert gas storage device 8 work together to form a stable oxygen-free atmosphere in the cooling chamber 3, effectively preventing easily oxidized materials from rusting during the processing; the pressure limiting valve 10 on the top of the cooling chamber 3 can regulate the pressure inside the chamber in real time to prevent pressure overload from causing safety risks. The cooling device 14 on the outer wall of the furnace body 1 can control the temperature of the outer shell 13 below 50°C, preventing the outer shell from overheating and affecting the stability of the magnetic field generating mechanism 2. In addition, the sample stage 5 has a multi-layer structure, with each layer having an array of positioning slots and through-hole baffles around it, which allows heat and inert gas to act evenly on the sample. Combined with the thermocouple 51 installed inside, it can monitor the sample temperature in real time and accurately, ensuring the uniformity and quality stability of sample processing. The whole system is suitable for the magnetic field heat treatment requirements of materials such as magnetic alloys.

[0044] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0046] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A magnetic field heat treatment apparatus, characterized in that, include: The furnace body has an opening at one of its upper and lower ends; The magnetic field generating mechanism is located around the furnace body; The cooling chamber has an opening at one end, which is connected to the opening of the furnace body. A drive mechanism, which is connected to the cooling chamber and extends into the furnace body at the other end; The sample stage is connected to the other end of the drive mechanism; A valve, which is connected between the furnace body and the cooling chamber, is used to control the on / off state of the openings of both.

2. The magnetic field heat treatment apparatus according to claim 1, characterized in that, It also includes an intake valve and an inert gas storage device. One side of the cooling chamber is connected to the outlet of the inert gas storage device through a pipe, and the intake valve is installed inside the pipe.

3. The magnetic field heat treatment apparatus according to claim 2, characterized in that, It also includes an exhaust valve and an air extraction device; the exhaust valve is located in the cooling chamber on the side opposite to the air inlet valve, the air extraction device is connected to the cooling chamber through a pipe, and the exhaust valve is located in the pipe between the cooling chamber and the air extraction device.

4. The magnetic field heat treatment apparatus according to claim 3, characterized in that, It also includes a pressure relief valve, which is located at the top of the cooling chamber.

5. The magnetic field heat treatment apparatus according to claim 1, characterized in that, The sample stage has a multi-layer structure, with each layer having an array of positioning slots and through-hole baffles around its perimeter.

6. The magnetic field heat treatment apparatus according to claim 5, characterized in that, It also includes thermocouples, which are installed inside the sample stage.

7. The magnetic field heat treatment apparatus according to claim 1, characterized in that, The driving mechanism includes a lifting drive motor, a lead screw, two slide rails, a crossbeam, a rotary drive motor, and a rod. The two slide rails are respectively vertically fixed to the inner sides of opposite parts of the cooling chamber. The two ends of the crossbeam are slidably connected to the slide rails on both sides via sliders. The lifting drive motor is rigidly connected to the top of the cooling chamber. The output end of the lifting drive motor is connected to one end of the lead screw, and the other end of the lead screw is threaded and threaded to the crossbeam. By controlling the rotation of the lead screw, the crossbeam is driven to rise and fall stably along the slide rails. At the same time, the rotary drive motor is fixedly installed on the crossbeam, and its output end is fixedly connected to one end of the rod. The rod extends vertically into the furnace body, and the other end is fixedly connected to the sample stage.

8. The magnetic field heat treatment apparatus according to claim 1, characterized in that, The furnace body includes a furnace tube, a heating element, a shell, and a cooling device. The shell is a cavity with one end open. The furnace tube has one end open and is coaxially fixed with the shell. The heating element is disposed between the furnace tube and the shell. The cooling device includes a temperature control and a coolant. The coolant circulates inside the shell to control the temperature of the shell to not exceed 50°C.

9. The magnetic field heat treatment apparatus according to claim 1, characterized in that, An observation window is provided on the side wall of the cooling chamber.

10. The magnetic field heat treatment apparatus according to claim 1, characterized in that, The cooling chamber is equipped with a material handling door.

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