A microwave heating device for metal wire heat treatment

Abstract

The application discloses a microwave heating device for metal wire heat treatment, which comprises a shell, a microwave emission assembly and at least one heating assembly. The inside of the shell is formed with a fixing cavity. The shell is provided with a feeding port and a discharging port which are communicated with the fixing cavity. The microwave emission assembly is used for emitting microwaves into the fixing cavity. The heating assembly is built in the shell. The heating assembly comprises a wave-absorbing heating layer. The wave-absorbing heating layer is formed with a heating channel which is communicated with the feeding port and the discharging port. The wave-absorbing heating layer can heat after absorbing microwaves to heat the metal wire in the heating channel. The microwave heating device can adjust the temperature in the heating channel according to needs, can meet the temperature requirements of different processes or metal materials of the drying furnace, the annealing furnace and the diffusion furnace in the metal wire heat treatment process, and can heat treat the metal wire according to the required temperature.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology for metal wires, and more particularly to a microwave heating device for heat treatment of metal wires. Background Technology

[0002] Common metal wires include steel bars for construction, steel cables, steel wires in radial tires, and copper conductors in enameled wires. During the production process, these metal wires usually require heat treatment to dry, anneal, and alloy and diffuse the coating on the surface of the steel cords, such as steel bars, steel cables, tire cords, and copper wires. Common heat treatment methods for metal wires include electric heating, natural gas combustion heating, and medium-frequency induction heating.

[0003] Yi Fuming [Yi Fuming. Drying of steel wire after pickling using waste heat from flue gas [J]. Metal Products, 1986(04):49.] disclosed a method of drying steel wire after pickling using waste heat from the flue gas of a heat treatment furnace. This method is not only energy-saving, but also allows for easy control of the drying speed by controlling the flow rate of the flue gas.

[0004] However, this drying device requires the use of flue gas, but in actual use, the waste heat from the flue is not always available, and the temperature of the flue gas is not easy to control, making it impossible to heat treat the metal wire according to the required temperature. Summary of the Invention

[0005] In view of this, it is necessary to provide a microwave heating device for heat treatment of metal wires, so as to solve the technical problem that the existing metal wire heat treatment devices cannot perform heat treatment of metal wires at the required temperature.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a microwave heating device for heat treatment of metal wires, comprising: The housing has a fixed cavity inside, and the housing has an inlet and an outlet that communicate with the fixed cavity; A microwave transmitting assembly is used to transmit microwaves into the fixed cavity; At least one heating element is built into the housing. The heating element includes a microwave absorbing heating layer. The microwave absorbing heating layer forms a heating channel connecting the feed inlet and the discharge outlet. The microwave absorbing heating layer can generate heat after absorbing microwaves to heat the metal wire in the heating channel.

[0007] In one embodiment, the material of the microwave absorbing heating layer includes nano-tetranexamic zinc oxide powder, silicon carbide ceramic particles, or a mixture thereof.

[0008] In one embodiment, the silicon carbide ceramic particles have a fineness of 10-20 mesh.

[0009] In one embodiment, the silicon carbide ceramic particles account for 10% to 50% of the total mass of the microwave absorbing and heating layer.

[0010] In one embodiment, the material of the microwave absorbing heating layer further includes iron oxide powder, which fills the gap between the nano-needle-shaped zinc oxide powder and the silicon carbide ceramic particles.

[0011] In one embodiment, the heating component further includes a housing and a hollow tube. The housing is hollow inside and open at both ends. The housing can be made of quartz glass or quartz ceramic. The hollow tube is built into the housing and forms the heating channel inside the hollow tube. The hollow tube can be made of any one of quartz glass, quartz ceramic, and stainless steel. The wave-absorbing heating layer fills the space between the inner wall of the housing and the outer wall of the hollow tube.

[0012] In one embodiment, the heating component further includes two housings, each housing being U-shaped, with the open sides of the two housings facing each other and enclosing each other to form the heating channel. A cavity is formed inside each housing. The material of the back-to-back side of the two housings can be quartz glass or quartz ceramic, and the material of the front-facing side of the two housings can be any one of quartz glass, quartz ceramic, and stainless steel. The wave-absorbing heating layer is built into the cavity.

[0013] In one embodiment, there are multiple heating elements, which are spaced apart along the feeding direction of the housing. The microwave heating device also includes at least two guide wheels, which are disposed between two adjacent heating elements and are rotatably built into the housing. The guide wheels are used to guide and transfer the metal wire.

[0014] In one embodiment, a heat insulation layer is further included, which is disposed between the heating component and the inner wall of the fixing cavity, and the heat insulation layer is made of polycrystalline ceramic fiber.

[0015] In one embodiment, a temperature measuring component is also included, which is built into any of the fixed cavity, the inlet, the outlet, and the heating channel for measuring temperature.

[0016] Compared with the prior art, the beneficial effects of the present invention include: when heat treatment of metal wire is required, the metal wire is inserted into the housing through the feed port, then passes through the heating channel at a certain speed and exits the housing through the discharge port. When the metal wire passes through the heating channel, the magnetron is energized and emits microwaves. Under microwave radiation, the microwave-absorbing heating layer absorbs the microwaves and generates heat. The heat generated by the microwave-absorbing heating layer is transferred into the heating channel, and the metal wire in the heating channel is heated by the heat generated by the microwave-absorbing heating layer to achieve heat treatment of the metal wire. Heat treatment of metal wire can be performed simply by energizing, without the need for heat from flue gas, natural gas, or electromagnetic induction. Moreover, the output power of the magnetron is adjusted by the microwave controller to control the temperature in the heating channel, making the temperature in the heating channel adjustable within the range of room temperature to 1200°C. The temperature in the heating channel can be adjusted as needed to meet the temperature requirements of different processes or metal materials in the heat treatment of metal wire, such as drying furnaces, annealing furnaces, and diffusion furnaces. The metal wire can be heat treated at the required temperature. The wire is heat-treated by absorbing microwaves through a microwave-absorbing heating layer. The microwave-absorbing heating layer converts microwave energy into infrared energy, which is different from traditional heating methods and achieves heating of the metal wire in the form of thermal radiation. By using a microwave absorbing heating layer to replace the traditional heat source, the heating temperature field can be designed according to heating needs, effectively reducing the required heating space. Moreover, microwave heating equipment provides concentrated heating without heat loss caused by air convection, making it more energy-efficient. The microwave absorbing heating layer is not only a heating element, but also a heat storage element, which can achieve precise control of different process temperatures in different processes of metal wire. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a microwave heating device for heat treatment of metal wires according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the unfolded structure of one side of the heating component in a microwave heating device for heat treatment of metal wires according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the heating component in a microwave heating device for heat treatment of metal wires according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the heating component in a microwave heating device for heat treatment of metal wires according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the heating component in a microwave heating device for heat treatment of metal wires according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: Casing 1; Microwave transmitting component 2; Heating component 3; Wave-absorbing heating layer 31; Box body 32; Hollow tube 33; Guide wheel 4; tube body 5; Insulation layer 6; 7. Metal wire. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0020] like Figures 1 to 5 As shown, the present invention provides a microwave heating device for heat treatment of metal wire, including a housing 1, a microwave emitting component 2, and at least one heating component 3. A fixed cavity is formed inside the housing 1, and the housing 1 has an inlet and an outlet communicating with the fixed cavity. The microwave emitting component 2 emits microwaves into the fixed cavity. The heating component 3 is built into the housing 1 and includes a microwave absorbing heating layer 31. The microwave absorbing heating layer 31 forms a heating channel communicating with the inlet and outlet. The microwave absorbing heating layer 31 can heat up after absorbing microwaves to heat the metal wire 7 within the heating channel. It should be understood that the microwave emitting component 2 can be a magnetron. Of course, in other embodiments, the microwave emitting component 2 can also be implemented in other forms. This application does not specifically limit the implementation form of the microwave emitting component 2. It should be understood that the number of magnetrons can be one or more, and the magnetrons can be located on one side of the housing 1 or on other sides of the housing 1.

[0021] When heat treatment of the metal wire 7 is required, the metal wire 7 is inserted into the housing 1 through the feed port, and then passes through the heating channel at a certain speed and exits the housing 1 through the discharge port. As the metal wire 7 passes through the heating channel, the magnetron is energized and emits microwaves. Under the microwave radiation, the microwave-absorbing heating layer 31 absorbs the microwaves and generates heat. The heat generated by the microwave-absorbing heating layer 31 is transferred into the heating channel, thereby heating the metal wire 7 within the heating channel to achieve heat treatment. Heat treatment of the metal wire 7 can be performed simply by energizing it, without the need for heat from flue gas, natural gas, or electromagnetic induction. Furthermore, the output power of the magnetron is adjusted by the microwave controller to control the temperature within the heating channel, making the temperature adjustable within the range of room temperature to 1200℃. This allows for temperature adjustment as needed, meeting the temperature requirements of different processes or metal materials in the heat treatment of the metal wire 7, such as drying furnaces, annealing furnaces, and diffusion furnaces. The metal wire 7 can be heat-treated at the required temperature.

[0022] The wire is heat-treated by absorbing microwaves and heating the wire with a microwave-absorbing heating layer 31. The microwave-absorbing heating layer 31 converts microwave energy into infrared energy. Unlike traditional heating methods, it heats the metal wire in the form of thermal radiation, which effectively reduces the energy consumption in the production of traditional metal wires. By replacing the traditional heat source with a microwave absorbing heating layer 31, the heating temperature field can be designed according to heating needs, effectively reducing the required heating space. Moreover, the microwave heating equipment provides concentrated heating without heat loss caused by air convection, resulting in significant energy savings. The microwave absorbing heating layer 31 is not only a heating element, but also a heat storage element, which can realize precise control of different process temperatures in different processes of metal wire 7; Compared to the traditional metal wire production process which uses a variety of different heat treatment equipment for different steps, the microwave heating equipment using the absorbing heating layer 31 as the heating element can meet the different temperature requirements of different steps in the metal wire production process. The microwave heating equipment has a simple structure and operates stably and reliably. The microwave absorbing heating layer 31 has stable physical and chemical properties and does not require replacement during use; the magnetron has a long service life and requires no maintenance during use, resulting in low equipment maintenance costs.

[0023] In one embodiment, the material of the microwave absorbing heating layer 31 includes nano-tetranexamic zinc oxide powder, silicon carbide ceramic particles, or a mixture thereof.

[0024] Among them, the nano-tetraneedle ZnOw is a relatively unique type of nano-ZnO. It has a unique three-dimensional structure and excellent piezoelectric properties, which endows the tetraneedle nano-ZnO with good electromagnetic wave absorption properties. In particular, the absorption effect and heating characteristics are more significant in the microwave range. The tetraneedle zinc oxide powder has good microwave absorption and heating performance, high temperature resistance, and stable physical and chemical properties. Since the magnetron is located on one side of the microwave absorbing heating layer 31, it may cause uneven heat distribution in the microwave absorbing heating layer 31, making it impossible to guarantee temperature uniformity. In this embodiment, silicon carbide ceramic is added to the four needle-shaped zinc oxide powder. Silicon carbide ceramic is also a microwave absorbing heating material and has excellent thermal conductivity. Its thermal conductivity can reach 150-500 W / (m·K) at room temperature, which is higher than that of general metals. By transferring temperature through silicon carbide ceramic particles, the temperature on different sides of the microwave absorbing heating layer 31 tends to be uniform, thus avoiding uneven temperature distribution in the microwave absorbing heating layer 31. After the granular silicon carbide spheres absorb waves and generate heat, they have good heat storage and thermal conductivity, making the internal temperature of the heating cavity more uniform and effectively avoiding the problem of uneven temperature on different sides of the cable. Moreover, the granular silicon carbide is placed in the fixed cavity of the sealed shell 1, with only the outer surface in contact with a small amount of air. Air cannot penetrate into the granular silicon carbide, which can effectively slow down oxidation at high temperatures and prevent silicon carbide from oxidizing and failing at high temperatures.

[0025] Compared to other microwave absorbing and heating materials, such as carbon powder, carbon powder will spontaneously combust at around 300℃. After spontaneous combustion, it cannot absorb microwaves and generate heat, and is not suitable for annealing metal wire 7. Compared to ferrite, ferrite has a lower Curie temperature, generally between 300℃ and 400℃. Above this temperature, a phase transition occurs, making it unable to absorb microwaves and unsuitable for use at high temperatures.

[0026] In one embodiment, the silicon carbide ceramic particles have a fineness of 10-20 mesh.

[0027] Because the larger the size of silicon carbide particles, the slower the absorption speed of silicon carbide, which leads to a slower heating rate, and the smaller the size of silicon carbide particles, the easier they are to oxidize and the more prone they are to oxidation failure. In this embodiment, by controlling the fineness of silicon carbide ceramic particles to 10-20 mesh, the silicon carbide ceramic particles have good oxidation resistance and a faster absorption speed. By controlling the size of silicon carbide ceramic particles, the oxidation resistance and absorption speed of silicon carbide are regulated.

[0028] In one embodiment, silicon carbide ceramic particles account for 10% to 50% of the total mass of the microwave absorbing heating layer 31.

[0029] If the silicon carbide ceramic particles account for too much of the total mass of the microwave absorbing heating layer 31, the heating speed of the microwave absorbing heating layer 31 will be slow. If the silicon carbide ceramic particles account for too little of the total mass of the microwave absorbing heating layer 31, the temperature uniformity of the microwave absorbing heating layer 31 will be poor. In this embodiment, by making the silicon carbide ceramic particles account for 10% to 50% of the total mass of the microwave absorbing heating layer 31, the heating speed can be guaranteed while satisfying the temperature uniformity of the microwave absorbing heating layer 31.

[0030] In one embodiment, the material of the microwave absorbing heating layer 31 also includes iron oxide powder, which fills the gap between the nano-needle-shaped zinc oxide powder and the silicon carbide ceramic particles.

[0031] Since the nano-tetranexamic zinc oxide powder is tetranexamic while the silicon carbide particles are spherical, a small gap will be generated between the two after they are mixed. In this embodiment, iron oxide powder is added to fill the gap between the nano-tetranexamic zinc oxide powder and the silicon carbide particles, thereby reducing the contact of oxygen with the silicon carbide particles and slowing down the oxidation of the silicon carbide particles. Moreover, iron oxide powder is also a microwave absorbing and heating material. Although iron oxide cannot absorb microwaves temporarily after phase change, the solid iron oxide powder can still absorb microwaves after the temperature drops.

[0032] In one embodiment, the iron oxide powder exhibits a particle size effect with nano-tetranexamic zinc oxide powder and silicon carbide particles. This arrangement allows the iron oxide powder to effectively fill the gaps between the nano-tetranexamic zinc oxide powder and the silicon carbide particles.

[0033] In one embodiment, the housing 1 is made of metal. It should be understood that the housing 1 may be made of one or more of the following materials: stainless steel, copper, aluminum, etc.

[0034] By making the shell 1 a metal material, the metal shell 1 can effectively shield outwardly scattered microwaves and prevent microwaves from leaking out of the shell 1.

[0035] It should be understood that the microwave transmitting component 2 can be built into the housing 1 or placed outside the housing 1. When the microwave transmitting component 2 is located outside the housing 1, a channel can be opened on the outer wall of the housing 1, and the microwave transmitting component 2 can be placed inside the microwave shielding structure (not shown in the figure), and the microwave shielding structure is connected to the channel. At this time, the microwave transmitting component 2 is located outside the housing 1, which facilitates the maintenance of the microwave transmitting component 2, and the microwave shielding structure can shield the microwave transmitting component 2 from emitting microwaves outside the housing 1; wherein the microwave shielding structure can be a metal mesh shielding cover with one end open.

[0036] like Figure 2 and Figure 3As shown, in one embodiment, the heating component 3 further includes a housing 32 and a hollow tube 33. The housing 32 is hollow inside and open at both ends. The housing 32 can be made of quartz glass or quartz ceramic. The hollow tube 33 is built into the housing 32 and forms a heating channel inside the hollow tube 33. The hollow tube 33 can be made of any one of quartz glass, quartz ceramic and stainless steel. The wave-absorbing heating layer 31 is filled between the inner wall of the housing 32 and the outer wall of the hollow tube 33.

[0037] By setting up a housing 32 and a hollow tube 33, the microwaves emitted by the microwave emitting assembly 2 pass through the housing 32 made of quartz glass or quartz ceramic and are directed towards the microwave absorbing heating layer 31. The microwave absorbing heating layer 31 absorbs the microwaves and generates heat. The heat generated by the microwave absorbing heating layer 31 is transferred to the heating channel through the hollow tube 33 to heat the metal wire 7 in the heating channel. Since the inner wall of the housing 32 and the outer wall of the hollow tube 33 enclose a cavity that can accommodate the microwave absorbing heating layer, the powdered microwave absorbing heating layer can be fixed in the cavity without having to process the microwave absorbing heating layer 31 into a fixed shape.

[0038] like Figure 4 and Figure 5 As shown, in one embodiment, the heating component 3 further includes two housings 32, which are U-shaped and have their opening sides facing each other to form a heating channel. A cavity is formed inside the housings 32. The material of the side of the two housings 32 facing away can be quartz glass or quartz ceramic, and the material of the side of the two housings 32 facing each other can be any one of quartz glass, quartz ceramic and stainless steel. The wave-absorbing heating layer 31 is built into the cavity.

[0039] By setting two U-shaped housings 32, the heating channel formed by the two U-shaped housings 32 can be enclosed. The two U-shaped housings 32 are easier to process than a single housing 32. A certain amount of processing error is allowed between the two housings 32, and the processing requirements are lower. Moreover, by forming a cavity inside the housing 32 and embedding the microwave absorbing heating layer 31 inside the cavity, the microwave absorbing heating layer 31 is isolated from the outside air, preventing the outside air from oxidizing the microwave absorbing heating layer 31. Since the cavity is located inside the housing 32, after the powdered microwave absorbing heating layer 31 is filled into the cavity, the microwave absorbing heating layer 31 can effectively absorb heat. The wave-absorbing heating layer 31 has a cavity shape, so there is no need to process the wave-absorbing heating layer 31 into a fixed shape. Moreover, different shapes of wave-absorbing heating layers 31 can be designed according to different cavity shapes. By setting one side of the housing 32 to quartz glass or quartz ceramic, both of which are wave-transparent materials, microwaves can pass through the quartz glass and quartz ceramic and be directed to the wave-absorbing heating layer 31. On the side of the two housings 32 facing each other, any one of quartz glass, quartz ceramic and stainless steel can be used to transfer heat into the heating channel through the quartz glass, quartz ceramic and stainless steel to heat the metal wire 7 in the heating channel.

[0040] In one embodiment, there are multiple heating elements 3, which are spaced apart along the feeding direction of the housing 1. The microwave heating device also includes at least two guide wheels 4, which are disposed between two adjacent heating elements 3 and are rotatably built into the housing 1. The guide wheels 4 are used to guide and transfer the metal wire 7.

[0041] Since the metal wire 7 is generally long, a certain amount of time is required to complete the heat treatment process when drying or annealing the metal wire 7. In order to achieve the requirements of the heat treatment process, the length of the heating channel required is also long. In this embodiment, multiple heating components 3 are set up. Multiple heating components 3 arranged at intervals can form a heating channel of the required length to achieve heat treatment of the metal wire 7. Moreover, by setting guide wheels 4 between adjacent heating components 3, the guide wheels 4 can transfer the metal wire 7 from one heating component to the next heating component. The guide wheels 4 can help maintain the straightness and stability of the metal wire 7. It should be understood that the guide wheels 4 can be rotatably connected to the inner wall of the housing 1 or the box 32.

[0042] This ensures the smooth operation of the metal wire 7 throughout the heat treatment process. Furthermore, the guide wheel 4 helps control the speed and tension of the metal wire 7, ensuring that it receives proper treatment even without heat treatment, thereby achieving the desired mechanical and physical properties.

[0043] In one embodiment, adjacent heating elements 3, as well as heating elements 3 and their connections to the inlet and outlet, can be connected via a tube 5. The tube 5 is made of stainless steel. It should be understood that the guide wheel 4 is built into the tube 5 and rotatably connected to the inner wall of the tube 5. The tube 5, the heating elements 3, and the inner wall of the fixed cavity of the housing 1 together form a closed cavity that can isolate air.

[0044] By setting the tube body 5, the connection between adjacent heating components 3 is realized, so that the heating components 3 form a complete heating channel. Moreover, the stainless steel tube body 5 can shield microwaves and prevent microwaves from being scattered outward through the inlet and outlet of the shell 1.

[0045] In one embodiment, the microwave heating device for heat treatment of metal wires further includes a heat insulation layer 6, which is disposed between the heating component 3 and the inner wall of the fixed cavity, and the heat insulation layer 6 is made of polycrystalline ceramic fiber.

[0046] By setting up the insulation layer 6, the insulation layer 6 can keep the heat-absorbing heating layer 31 warm, slow down the heat transfer to the outside, and play an energy-saving and heat-preserving role.

[0047] Insulation layer 6 is made of polycrystalline ceramic fiber, which has the following advantages: Excellent thermal insulation performance: Polycrystalline ceramic fibers have excellent thermal insulation performance, which can effectively reduce heat transfer and lower the surface temperature of shell 1, thereby achieving the purpose of energy saving; Excellent heat resistance: Polycrystalline ceramic fibers can maintain stable performance in high-temperature environments without melting, oxidation, or deformation, and can be used for a long time at high temperatures; Lightweight: Polycrystalline ceramic fiber is a lightweight material, weighing only about half that of traditional insulation materials. Therefore, the load on the wall is reduced and the shell is not subjected to excessive pressure. High safety: Polycrystalline ceramic fiber is a non-combustible material that will not cause fires or other safety hazards at high temperatures, thus ensuring the safety of microwave heating devices.

[0048] In one embodiment, the microwave heating apparatus for heat treatment of metal wire further includes a temperature measuring component (not shown in the figure), which is built into any position in the fixed cavity, the feed inlet, the discharge outlet, and the heating channel, and is used to measure the temperature. It should be understood that the temperature measuring component can be a thermocouple temperature sensor, an infrared temperature sensor, etc.

[0049] By setting up temperature sensing components, the temperature of the fixed cavity, inlet, outlet, and heating channel can be monitored in real time, making it easy to adjust the required temperature as needed.

[0050] It should be understood that the microwave heating device for heat treatment of metal wire can also be equipped with a PLC control system (not shown in the figure). The temperature measuring component and the magnetron are connected through the PLC control system. When in use, the required temperature is set through the PLC control system. The PLC control system adjusts the power of the magnetron based on the temperature measured by the temperature measuring component, so that the temperature reaches and is maintained at the set temperature.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A microwave heating device for heat treatment of metal wire, characterized in that, include: The housing has a fixed cavity inside, and the housing has an inlet and an outlet that communicate with the fixed cavity; A microwave transmitting assembly is used to transmit microwaves into the fixed cavity; Multiple heating components are built into the housing. Each heating component includes a microwave absorbing heating layer. The microwave absorbing heating layer forms a heating channel connecting the feed inlet and the discharge outlet. The microwave absorbing heating layer can generate heat after absorbing microwaves to heat the metal wire in the heating channel. The microwave absorbing and heating layer is made of a mixture of nano-tetranexamic zinc oxide powder and silicon carbide ceramic particles; the silicon carbide ceramic particles have a fineness of 10-20 mesh; the silicon carbide ceramic particles account for 10% to 50% of the total mass of the microwave absorbing and heating layer; the microwave absorbing and heating layer also includes iron oxide powder, which fills the gaps between the nano-tetranexamic zinc oxide powder and the silicon carbide ceramic particles; Multiple heating elements are spaced apart along the feeding direction of the housing. Adjacent heating elements are connected to each other, and the heating elements are connected to the inlet and outlet via tubes. The tubes are made of stainless steel. The microwave heating device also includes at least two guide wheels. The guide wheels are disposed between two adjacent heating elements. The guide wheels are built into the tubes and are rotatably connected to the inner wall of the tubes. The guide wheels are used to guide and transfer metal wires.

2. The microwave heating device for heat treatment of metal wires according to claim 1, characterized in that, The heating component also includes a housing and a hollow tube. The housing is hollow inside and open at both ends. The housing is made of quartz glass or quartz ceramic. The hollow tube is built into the housing and forms the heating channel inside the hollow tube. The hollow tube is made of any one of quartz glass, quartz ceramic, and stainless steel. The wave-absorbing heating layer is filled between the inner wall of the housing and the outer wall of the hollow tube.

3. The microwave heating apparatus for heat treatment of metal wires according to claim 1, characterized in that, The heating component also includes two housings, each housing being U-shaped, with the opening sides of the two housings facing each other and enclosing each other to form the heating channel. The interior of each housing has a cavity. The material of the back-to-back side of the two housings is quartz glass or quartz ceramic, and the material of the front-facing side of the two housings is any one of quartz glass, quartz ceramic, and stainless steel. The wave-absorbing heating layer is built into the cavity.

4. The microwave heating apparatus for heat treatment of metal wires according to claim 1, characterized in that, It also includes a heat insulation layer, which is disposed between the heating component and the inner wall of the fixed cavity, and the heat insulation layer is made of polycrystalline ceramic fiber.

5. The microwave heating apparatus for heat treatment of metal wires according to claim 1, characterized in that, It also includes a temperature measuring component, which is built into any position in the fixed cavity, the feed inlet, the discharge outlet, and the heating channel, and is used to measure the temperature.

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