High-temperature alloy surface boriding temperature control device
By using high-temperature-resistant insulated inner cylinder and electromagnetic heating components during the alloy boron dehydration process, combined with fluorescent fiber temperature sensors, the heat loss and temperature difference problems in the alloy boron dehydration process are solved, efficient and uniform temperature control is achieved, and product quality is improved.
Patent Information
- Application Number
- CN202421679337.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The prior art has heat loss and temperature difference problems in the process of boron dehydration of alloys, resulting in unstable product quality.
It adopts a high-temperature insulated inner cylinder and electromagnetic heating assembly, combined with a fluorescent fiber temperature sensor, accurately controls the temperature of the high-temperature alloy workpiece, ensures heat positioning and transmission to the surface of the workpiece, reduces energy consumption and improves temperature uniformity.
It realizes uniform heating of the surface of the alloy workpiece, reduces energy consumption, and improves product quality stability and performance consistency.
Smart Images
Figure CN223226148U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of alloy heat treatment, in particular to a high-temperature alloy surface boronizing temperature control device. Background Art
[0002] In the prior art, when heat treating an alloy, the workpiece to be boronized is first placed in a boronizing box, and then a powdered boronizing agent is poured evenly and fluffily into the boronizing box, the workpiece is buried in the boronizing agent, and the box is sealed. The boronizing box is then placed in a medium-to-large industrial muffle furnace for a high-temperature boronizing treatment of more than 600°C for up to 6-8 hours. During the boronizing process, due to the large cavity inside the muffle furnace, a certain amount of heat loss occurs when heat is conducted from the furnace inner wall to the boronizing box, resulting in high energy consumption. In addition, there is a large temperature difference at each position in the furnace, which results in a certain temperature difference when the temperature is conducted to the workpiece surface, seriously affecting multiple key performance indicators of the boronized layer, such as wear resistance, density, and surface hardness, and ultimately resulting in the inability to guarantee product quality. This is also an important shortcoming that limits product quality in the current high-temperature alloy boronizing technology. Utility Model Content
[0003] The purpose of the utility model is to provide a high-temperature alloy surface boronizing temperature control device to solve the above problems, so as to ensure the uniformity of heating of metal workpieces during the heat treatment process of the alloy and improve product quality.
[0004] To achieve the above purpose, the present invention provides the following solutions:
[0005] A high-temperature alloy surface boriding temperature control device comprises an outer shell, a high-temperature resistant insulating inner cylinder is fixedly connected to the inner side of the outer shell, an accommodating cavity is reserved between the outer shell and the high-temperature resistant insulating inner cylinder, an electromagnetic heating component is arranged in the accommodating cavity, a temperature sensor is installed on the inner wall of the high-temperature resistant insulating inner cylinder, and the temperature sensor, the electromagnetic heating component and a controller are electrically connected.
[0006] Preferably, the electromagnetic heating assembly includes a plurality of electromagnetic heating parts, and the plurality of electromagnetic heating parts are arranged along the axial direction of the high-temperature resistant insulating inner tube. The plurality of electromagnetic heating parts are connected to each other, and the electromagnetic heating part located at the top is connected to a protective gas inlet pipe, and the protective gas inlet pipe extends out of the outer shell, and the electromagnetic heating part located at the bottom is connected to a protective gas exhaust pipe, and the protective gas exhaust pipe extends out of the outer shell, and the plurality of electromagnetic heating parts are arranged in the accommodating cavity.
[0007] Preferably, the electromagnetic heating part includes a plurality of high-temperature resistant insulating shells, which are arranged at equal intervals along the circumference of the high-temperature resistant insulating inner tube, and the two circumferentially adjacent high-temperature resistant insulating shells are connected through a second connecting hole, and the upper and lower adjacent high-temperature resistant insulating shells are connected through a first connecting hole, one of the several high-temperature resistant insulating shells located at the top is connected to the protective gas inlet pipe, and one of the several high-temperature resistant insulating shells located at the bottom is connected to the protective gas exhaust pipe, and the high-temperature resistant insulating shell is installed with an electromagnetic coil near the inner side wall of the high-temperature resistant insulating inner tube, and the electromagnetic coil is electrically connected to the controller.
[0008] Preferably, the temperature sensor is provided in a one-to-one correspondence with the electromagnetic coil, and the temperature sensor is a fluorescent optical fiber temperature sensor.
[0009] Preferably, the circumferential number of the high-temperature resistant insulating shells is four, and the vertical number of the high-temperature resistant insulating shells is three.
[0010] The utility model has the following technical effects:
[0011] The boriding box is placed in the middle of the high-temperature resistant insulating inner cylinder. Then when the electromagnetic heating component is energized, the high-temperature alloy workpiece in the boriding box will generate an induced current, and then the workpiece itself will start to heat up. Only the high-temperature alloy workpiece itself is a conductor in the boriding box, so only the workpiece itself will heat up in the entire device. The heat will be precisely located and transferred to the surface of the high-temperature alloy, which saves a lot of energy while ensuring that the temperature of the contact surface between the workpiece and the boriding layer is precisely controlled. There is no heat loss, and the corresponding processing temperature can be obtained by adjusting the power of the surrounding electromagnetic heating components, with extremely low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0013] Figure 1 This is a schematic diagram of the internal structure of the utility model;
[0014] Figure 2 It is a schematic diagram of the top cross-sectional structure of the utility model.
[0015] Among them, 1. outer shell; 101. accommodating cavity; 2. high temperature resistant insulating inner cylinder; 3. high temperature resistant insulating shell; 4. electromagnetic coil; 5. temperature sensor; 6. first connecting hole; 7. protective gas inlet pipe; 8. protective gas exhaust pipe; 9. second connecting hole. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0018] Reference Figures 1 to 2 As shown, this embodiment provides a high-temperature alloy surface boronizing temperature control device, including an outer shell 1, a high-temperature resistant insulating inner tube 2 is fixedly connected to the inner side of the outer shell 1, an accommodating cavity 101 is reserved between the outer shell 1 and the high-temperature resistant insulating inner tube 2, an electromagnetic heating component is provided in the accommodating cavity 101, a temperature sensor 5 is installed on the inner wall of the high-temperature resistant insulating inner tube 2, and the temperature sensor 5, the electromagnetic heating component and the controller are electrically connected.
[0019] The boriding box is placed in the middle of the high-temperature resistant insulating inner cylinder 2. Then, when the electromagnetic heating component is energized, the high-temperature alloy workpiece in the boriding box will generate an induced current, and then the workpiece itself will start to heat up. Only the high-temperature alloy workpiece itself is a conductor in the boriding box, so only the workpiece itself will heat up in the entire device. The heat will be precisely positioned and transferred to the surface of the high-temperature alloy, which saves a lot of energy while ensuring that the temperature of the contact surface between the workpiece and the boriding layer is precisely controlled. There is no heat loss, and the corresponding processing temperature can be obtained by adjusting the power of the electromagnetic heating components around it, with extremely low energy consumption.
[0020] A further optimized solution is that the electromagnetic heating assembly includes a plurality of electromagnetic heating parts, which are arranged along the axial direction of the high-temperature resistant insulating inner tube 2, and are interconnected. The electromagnetic heating part located at the top is connected to a protective gas inlet pipe 7, which extends out of the outer shell 1, and the electromagnetic heating part located at the bottom is connected to a protective gas exhaust pipe 8, which extends out of the outer shell 1, and the plurality of electromagnetic heating parts are arranged in the accommodating cavity 101.
[0021] The shielding gas inlet pipe 7 plays a protective role in the operation of the electromagnetic heating part.
[0022] Further optimization scheme, the electromagnetic heating part includes a plurality of high-temperature resistant insulating shells 3, the high-temperature resistant insulating shells 3 are arranged at equal intervals along the circumference of the high-temperature resistant insulating inner tube 2, the two circumferentially adjacent high-temperature resistant insulating shells 3 are connected through the second connecting hole 9, and the upper and lower adjacent high-temperature resistant insulating shells 3 are connected through the first connecting hole 6, one of the several high-temperature resistant insulating shells 3 located at the top is connected to the protective gas inlet pipe 7, and one of the several high-temperature resistant insulating shells 3 located at the bottom is connected to the protective gas exhaust pipe 8, and the high-temperature resistant insulating shell 3 is installed with an electromagnetic coil 4 near the inner side wall of the high-temperature resistant insulating inner tube 2, and the electromagnetic coil 4 is electrically connected to the controller.
[0023] The electromagnetic coils 4 are arranged in multiple groups, so that the electromagnetic coils 4 can be independently controlled by the controller. In conjunction with the temperature sensor 5, local problems can be adjusted in a timely manner to ensure the temperature uniformity of the entire alloy during the heat treatment process.
[0024] According to a further optimized solution, the temperature sensor 5 is provided in a one-to-one correspondence with the electromagnetic coil 4 , and the temperature sensor 5 is a fluorescent optical fiber temperature sensor.
[0025] If conventional thermocouple thermometers are used during heating, inductive heating due to the metal material can cause inaccurate temperature measurements and potentially corrode the thermocouple. The fluorescence fiber optic temperature sensor employed in the present invention can accurately and real-time measure temperature in high-temperature and high-magnetic environments. The principle of a fluorescence fiber optic temperature sensor is that when a fluorescent substance at the end of a light beam receives light of a certain wavelength, electrons absorb photons and transition from a low energy level to an excited high energy level. This radiative transition from the high energy level back to the low energy level emits fluorescence. After the excitation pulse stops, the excited fluorescence typically decays exponentially. After the excitation pulse ends, two specific intensity values are taken on the fluorescence exponential decay curve. At the excitation pulse termination time t1, the intensity value of the decay signal is I0, and the time when the decay signal reaches the second value I0 / e is t2. The interval between t1 and t2 is the time constant τ of the exponential decay signal, which can be used to measure the fluorescence lifetime. The fluorescence lifetime varies at different ambient temperatures. Therefore, by measuring the fluorescence lifetime, the current ambient temperature can be determined. The fluorescent fiber optic temperature sensor is a completely non-metallic structure made of chemically inert rare earth materials. The fluorescent probe is safe for use in almost any environment and features immunity to EMI interference, compact size, high temperature measurement accuracy, fast response time, and stable performance. It can be placed directly at the desired location without affecting the insulation and voltage resistance of the switchgear.
[0026] According to a further optimized solution, the circumferential number of the high-temperature resistant insulating shells 3 is four, and the vertical number of the high-temperature resistant insulating shells 3 is three.
[0027] The high temperature resistant insulating inner tube (2), the high temperature resistant insulating shell (3), and the boronized box can be made of magnesium oxide. The melting point of magnesium oxide is about 2852°C, which can meet the high temperature requirements during the heat treatment process. At the same time, it also has high thermal conductivity and electrical insulation properties. In addition, magnesium oxide has stable chemical properties.
[0028] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.
[0029] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.
Claims
1. A high-temperature alloy surface boronizing temperature control device, characterized in that: The invention comprises an outer shell (1), a high-temperature resistant insulating inner cylinder (2) is fixedly connected to the inner side of the outer shell (1), a receiving cavity (101) is reserved between the outer shell (1) and the high-temperature resistant insulating inner cylinder (2), an electromagnetic heating component is arranged in the receiving cavity (101), a temperature sensor (5) is installed on the inner wall of the high-temperature resistant insulating inner cylinder (2), and the temperature sensor (5), the electromagnetic heating component and a controller are electrically connected.
2. A high-temperature alloy surface boronizing temperature control device according to claim 1, characterized in that: The electromagnetic heating assembly includes a plurality of electromagnetic heating parts, which are arranged along the axial direction of the high-temperature resistant insulating inner tube (2). The plurality of electromagnetic heating parts are connected to each other. The electromagnetic heating part located at the top is connected to a protective gas inlet pipe (7), and the protective gas inlet pipe (7) extends out of the outer shell (1). The electromagnetic heating part located at the bottom is connected to a protective gas exhaust pipe (8), and the protective gas exhaust pipe (8) extends out of the outer shell (1). The plurality of electromagnetic heating parts are arranged in the accommodating cavity (101).
3. The high-temperature alloy surface boronizing temperature control device according to claim 2, characterized in that: The electromagnetic heating part includes a plurality of high-temperature resistant insulating shells (3), and the high-temperature resistant insulating shells (3) are arranged at equal intervals along the circumference of the high-temperature resistant insulating inner tube (2). Two circumferentially adjacent high-temperature resistant insulating shells (3) are connected through a second connecting hole (9), and two upper and lower adjacent high-temperature resistant insulating shells (3) are connected through a first connecting hole (6). One of the high-temperature resistant insulating shells (3) located at the top is connected to the protective gas inlet pipe (7), and one of the high-temperature resistant insulating shells (3) located at the bottom is connected to the protective gas exhaust pipe (8). An electromagnetic coil (4) is installed on the high-temperature resistant insulating shell (3) near the inner wall of the high-temperature resistant insulating inner tube (2), and the electromagnetic coil (4) is electrically connected to the controller.
4. A high-temperature alloy surface boronizing temperature control device according to claim 3, characterized in that: The temperature sensor (5) is arranged in a one-to-one correspondence with the electromagnetic coil (4), and the temperature sensor (5) is a fluorescent optical fiber temperature sensor.
5. The high-temperature alloy surface boronizing temperature control device according to claim 3, characterized in that: The circumferential number of the high-temperature resistant insulating shells (3) is four, and the vertical number of the high-temperature resistant insulating shells (3) is three.