High-temperature rolling processing method and processing equipment and its application

Abstract

The present invention discloses a high-temperature rolling processing method and its processing device and application, the device includes a force-applying component, a rolling component, a temperature-controlling component and a load component; the temperature-controlling component includes a temperature-controlling box and a support stand, the support stand is arranged in the inner cavity of the temperature-controlling box; the load component includes a horizontally-installed carrier, a transmission rod and a first motor, one end of the transmission rod is connected to the side of the carrier, the other end is connected to the rotating shaft of the first motor after penetrating the wall of the temperature-controlling box, the first motor is used to control the horizontal movement of the carrier; the force-applying component is arranged along the vertical direction, and its bottom is connected to the rolling component after penetrating the temperature-controlling box, the bottom of the rolling component is abutted against the sample to be processed on the carrier. The present invention can perform precise high-temperature rolling processing on the surface of the sample by the coordinated arrangement of each component, and the mechanical properties and electrical properties of the sample after rolling processing are greatly improved, and the thermal conductivity is greatly reduced, and at the same time, the occurrence of cracks during processing is also avoided.

Description

[Technical field]

[0001] The present invention relates to the field of materials processing, in particular to a hot roller compaction method and processing device and their use. [Background technology]

[0002] At present, the toughening methods for low-toughness materials mainly include particle toughening, fiber whisker toughening, phase transformation toughening, residual stress toughening, etc. Take ceramic materials as an example. Ceramic materials have low fracture toughness, and are prone to microcracks on the material surface during processing and use, which may cause cracks to occur and expand during use, resulting in a significant decline in the reliability of the material. In the prior art, one of the mechanical modification methods for ceramic materials is known to be the introduction of a residual compressive stress layer on the ceramic surface by chemical treatment, heat treatment, shot peening, etc., among which, the residual compressive stress layer that can be introduced by chemical conversion treatment is very thin, the strengthening effect of the material is limited, and other properties of the material itself are affected; only some materials can be modified by heat treatment and shot peening technology, which affects the stability of the process, and new crack defects are likely to occur on the material surface during the treatment process, resulting in large variations in the mechanical properties of the material. Therefore, for low-toughness materials, it is difficult to avoid the occurrence of cracks without changing the original material with the existing toughening methods, so it is necessary to propose a universal processing method for low-toughness materials to solve the above existing problems. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention aims to provide a high-temperature rolling method and processing device thereof, and its application, for solving the problem of low surface treatment effect of low toughness materials in the prior art. [Means for solving the problem]

[0004] In order to solve the above technical problems, the present invention provides, as a first solution, a high-temperature rolling processing method, which includes the steps of heating a sample to be processed to a predetermined temperature, maintaining the predetermined temperature, and rolling the sample back and forth at a predetermined sliding period while applying a predetermined pressure to the surface of the sample to be processed; rolling the sample until a predetermined time is reached, and then cooling it to room temperature to obtain a sample having a residual compressive stress layer on its surface; the sample plastically deforms without cracking at the predetermined temperature, and the predetermined pressure and predetermined time are adapted to the thickness of the residual compressive stress layer formed on the surface of the sample.

[0005] In order to solve the above technical problems, the present invention provides a high-temperature rolling processing apparatus as a second solution, which includes a force-applying component, a pressing component, a temperature-controlling component and a load component; the temperature-controlling component includes a temperature-controlling box and a supporting platform, and the supporting platform is disposed in the inner cavity of the temperature-controlling box; the load component includes a horizontally-installed carrier, a transmission rod and a first motor, one end of the transmission rod is connected to the side of the carrier, and the other end is connected to the rotating shaft of the first motor after penetrating the wall of the temperature-controlling box, and the first motor is used to control the horizontal movement of the carrier; the force-applying component is disposed along the vertical direction, and its bottom is connected to the pressing component after penetrating the temperature-controlling box, and the bottom of the pressing component is abutted against the sample to be processed on the carrier, and is used to hot-press the sample to be processed; the high-temperature rolling processing apparatus is used to carry out the high-temperature rolling processing method in the first solution.

[0006] Preferably, the force-imparting component includes a force-imparting turntable, a first force-transmitting rod, a force sensor, a second force-transmitting rod, a third force-transmitting rod, a second motor, an ultrasonic transducer, and a water-cooling component, which are arranged coaxially; one end of the first force-transmitting rod is connected to the center of the force-imparting turntable, and the other end of the first force-transmitting rod is coaxially connected to the top of the second force-transmitting rod, and the force sensor is attached to the first force-transmitting rod so as to be sleeved; the second force-transmitting rod has a cylindrical structure, and one end of the third force-transmitting rod is connected to the top of the second force-transmitting rod. After penetrating the bottom, it is connected to the rotating shaft of the second motor, and the other end of the third force transmission rod penetrates the temperature control box and is then connected to the rolling component; the ultrasonic transducer is attached to the third force transmission rod by a sleeve and is positioned near the second force transmission rod, and the water-cooling component is attached to the third force transmission rod by a sleeve and is positioned between the ultrasonic transducer and the temperature control box; the second motor controls the third force transmission rod to drive the rolling component to rotate along the axial direction.

[0007] Preferably, the ultrasonic transducer is electrically connected to an external ultrasonic control component, the ultrasonic control component includes a power amplifier and a signal generator, the power amplifier is electrically connected to the signal generator and the ultrasonic transducer respectively; the signal generator sends a voltage signal and transmits it to the power amplifier, the power amplifier amplifies the voltage signal and then transmits it to the ultrasonic transducer, and the ultrasonic vibration is emitted from the ultrasonic transducer and transmitted to the rolling component via the third force transmission rod.

[0008] Preferably, the rolling component includes a ball fixing member and several balls, the top of the ball fixing member is connected to one end of the third force transmission rod remote from the second force transmission rod, and several balls are movably fitted to the bottom of the ball fixing member, and the several balls abut against the sample to be processed on the transport cart, and perform high-temperature rolling on the sample to be processed; when performing high-temperature rolling, the hardness of the balls is higher than the hardness of the sample to be processed.

[0009] Preferably, the high-temperature rolling processing apparatus further includes a frame mechanism, the frame mechanism including several support rods, a first fixed member, a second fixed member, a temperature control box support member and a base; several support rods are all arranged along a vertical direction, and the first fixed member, the second fixed member, the temperature control box support member and the base are all arranged horizontally and are all fixedly connected to the support rods perpendicularly; the first fixed member is arranged between the force-imparting turntable and the force sensor, and the first force transmission rod movably passes through the center of the first fixed member; the second fixed member is fixedly connected to the second motor, and the second force transmission rod and the third force transmission rod movably pass through the center of the second fixed member; the temperature control box support member is connected to the bottom of the temperature control box and the bottom of the support stand.

[0010] Preferably, the load component further includes a motor control box and a control box support member, the motor control box being electrically connected to the first motor and used to control the rotation speed and rotation direction of the first motor and control the sliding speed of the transport vehicle; the control box support member being connected to the support rod and used to support the first motor and the motor control box.

[0011] Preferably, the temperature control component further includes a temperature controller, which is in electrical communication with the temperature control box and is used to control the temperature of the inner cavity of the temperature control box.

[0012] Preferably, the high-temperature rolling processing apparatus further includes an atmosphere supply mechanism including a gas control box and a gas storage tank, the gas control box is connected to the gas storage tank and the internal cavity of the temperature control box respectively via a pipeline, and the gas control box is used to control the flow rate and flow velocity of the working gas export in the gas storage tank.

[0013] In order to solve the above technical problems, the present invention provides a third solution, which is the use of a high-temperature rolling processing apparatus in the above second solution: the high-temperature rolling processing apparatus is used to toughen the surface of ceramics and semiconductor materials and improve the electrical and thermal properties of the materials. Effect of the Invention

[0014] The beneficial effects of the present invention are: different from the prior art situation, the present invention provides a high-temperature rolling processing method and its processing apparatus and application, and by the coordinated arrangement of the force imparting component, the rolling component, the temperature control component and the load component, precise high-temperature rolling processing can be performed on the surface of the sample to be processed, and the mechanical properties and electrical properties of the sample after the rolling processing are greatly improved, and the thermal conductivity is greatly reduced, and at the same time, the occurrence of cracks during the processing process is effectively avoided. [Brief description of the drawings]

[0015] [Figure 1] A schematic diagram of the structure of one embodiment of a high-temperature rolling material processing device according to the present invention. [Diagram 2] Detailed configuration of area A in Figure 1 [Diagram 3] Processing effect diagram of alumina ceramic plate in embodiment 1 of the present invention [Figure 4] 1 is a schematic diagram of the three-dimensional structure of the improved rolling component of the present invention; [Diagram 5] Schematic diagram of high-temperature rolling treatment of the outer wall of a cylindrical sample of the improved rolling component of the present invention. [Figure 6] Schematic diagram of high-temperature rolling treatment of the inner wall of a cylindrical sample of the improved rolling component of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the embodiments of the present invention, but obviously, the described embodiments are only a part, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without paying creative efforts belong to the protection scope of the present invention.

[0017] Regarding the first solution of the present invention, the high-temperature rolling processing method proposed by the present invention includes the steps of heating the sample to be processed to a predetermined temperature, maintaining the predetermined temperature, applying a predetermined pressure to the surface of the sample to be processed and rolling it back and forth at a predetermined sliding period; rolling the sample until a predetermined time is reached, and then cooling it to room temperature to obtain a sample having a residual compressive stress layer on its surface; the sample plastically deforms without cracking at the predetermined temperature, and the predetermined pressure and the predetermined time are set according to the thickness of the residual compressive stress layer formed on the surface of the sample.

[0018] Regarding the second solution of the present invention, referring to FIG. 1 and FIG. 2, the high temperature rolling processing device in the present invention includes a force imparting component 1, a rolling component 2, a temperature control component 3, a load component 4 and a frame mechanism 5; the temperature control component 3 includes a temperature control box 31 and a support table 32, the support table 32 is disposed in the inner cavity of the temperature control box 31, and the temperature control component 3 is used to control the temperature of the inner cavity; the load component 4 includes a horizontally installed carrier 41, a transmission rod 42 and a first motor 43, the carrier 41 is disposed on the support table 32, one end of the transmission rod 42 is connected to the side of the carrier 41, and the other end penetrates the side wall of the temperature control box 31. After passing through, it is connected to the rotating shaft of the first motor 43, and the first motor 43 is used to control the horizontal movement of the carrier 41; the force-imparting component 1 is arranged along the vertical direction, and its bottom is connected to the rolling component 2 after passing through the temperature control box 31, and the bottom of the rolling component 2 is used to abut the sample 7 to be processed on the carrier 41 and perform high-temperature rolling on the sample 7 to be processed. When the plastic processing of the surface of the sample 7 is completed and the temperature is lowered to room temperature, a thicker residual compressive stress layer is formed on the surface of the sample than in the conventional method, which further improves the mechanical properties of the material such as strength, hardness, fracture toughness, and wear resistance, and can effectively prevent the occurrence of cracks during the processing process. Below, each component of the high-temperature rolling processing device in the present invention will be described in detail.

[0019] Specifically, the force-imparting component 1 includes a force-imparting turntable 11, a first force-transmitting rod 12, a force sensor 13, a second force-transmitting rod 14, a third force-transmitting rod 15, a second motor 16, an ultrasonic transducer 17, and a water-cooling component 18, which are arranged coaxially; one end of the first force-transmitting rod 12 is connected to the center of the force-imparting turntable 11, and the other end of the first force-transmitting rod 12 is coaxially connected to the top of the second force-transmitting rod 14, and the force sensor 13 is sleeved and attached to the first force-transmitting rod 12, and is used to measure the magnitude of the applied force in real time; the second force-transmitting rod 14 has a cylindrical structure, and one end of the third force-transmitting rod 15 is connected to the second After penetrating the bottom of the force transmission rod 14, it is connected to the rotating shaft of the second motor 16, and the other end of the third force transmission rod 15 is connected to the rolling component 2 after penetrating the temperature control box 31; the ultrasonic transducer 17 is sleeved and attached to the third force transmission rod 15 and is arranged near the second force transmission rod 14, and the water-cooling component 18 is sleeved and attached to the third force transmission rod 15 and is arranged between the ultrasonic transducer 17 and the temperature control box 31, and the water-cooling component 18 is used to block the temperature of the internal cavity of the temperature control box 31 and prevent high temperature conduction from affecting the normal operation of the ultrasonic transducer 17.

[0020] In the force-applying component 1, the force applied to the sample 7 to be processed is adjusted by rotating the force-applying turntable 11, and the third force transmission rod 15 is driven by the second motor 16 to rotate the rolling component 2 along the axial direction, so that the rolling component 2 can uniformly roll the surface of the sample 7.

[0021] In this embodiment, the ultrasonic transducer 17 adopts a general-purpose Langevin type piezoelectric ceramic vibrator, and its core element is composed of PZT piezoelectric ceramic P8; the ultrasonic transducer 17 is electrically connected to an external ultrasonic control component 171, the ultrasonic control component 171 includes a power amplifier 171a and a signal generator 171b, the power amplifier 171a is electrically connected to the signal generator 171b and the ultrasonic transducer 17 respectively; the signal generator 171b sends a voltage signal and transmits it to the power amplifier 171a, the power amplifier 171a amplifies the voltage signal and then transmits it to the ultrasonic transducer 17, the ultrasonic vibration is emitted from the ultrasonic transducer 17 and transmitted to the rolling component 2 through the third force transmission rod 15, so that when the rolling component 2 rolls the surface of the sample 7, the surface of the sample 7 can be rolled more smoothly with the assistance of the micro ultrasonic vibration.

[0022] Specifically, the rolling component 2 includes a ball fixing member 21 and several balls 22, the top of the ball fixing member 21 is connected to one end of the third force transmission rod 15 remote from the second force transmission rod 14, and several balls 22 are movably fitted into the bottom of the ball fixing member 21, and the several balls 22 abut against the sample 7 to be processed on the carrier 41 to perform high-temperature rolling on the sample 7 to be processed. In the ball rolling method used in this embodiment, preferably, high-temperature hard balls such as silicon nitride balls, silicon carbide balls, boron carbide balls, silicon boride balls, etc. are used as the balls 22; in other embodiments, the sample 7 may be rolled on the sample 7 by other methods such as roller rolling, but is not limited here.

[0023] Specifically, the frame mechanism 5 includes several support rods 51, a first fixing member 52, a second fixing member 53, a temperature control box supporting member 54 and a base 55, and the frame mechanism 5 is used to support and fix the force-giving component 1, the rolling component 2, the temperature control component 3 and the load component 4; the several support rods 51 are all arranged along the vertical direction, and the first fixing member 52, the second fixing member 53, the temperature control box supporting member 54 and the base 55 are all arranged horizontally and are all fixedly connected to the support rods 51 perpendicularly; the first fixing member 52 is arranged between the force-giving turntable 11 and the force sensor 13, and the first force sensor 14 is connected to the force-giving turntable 11 and the load component 4; The transmission rod 12 movably passes through the center of the first fixing member 52, and the first fixing member 52 is used to restrict the first force transmission rod 12 to move only in the vertical direction; the second fixing member 53 is fixedly connected to the second motor 16, and the second force transmission rod 14 and the third force transmission rod 15 both movably pass through the center of the second fixing member 53, and the second fixing member 53 is used to fix the second motor 16 while restricting the second force transmission rod 14 and the third force transmission rod 15 to move only in the vertical direction; the temperature control box support member 54 is connected to the bottom of the temperature control box 31 and the bottom of the support base 32, and is used to fix the temperature control box 31 and the support base 32.

[0024] Specifically, the load component 4 further includes a motor control box 44 and a control box support member 45, the motor control box 44 is electrically connected to the first motor 43 and is used to control the rotation speed and rotation direction of the first motor 43 and control the sliding speed of the carrier 41, under the control of the motor control box 44, the carrier 41 can perform unidirectional sliding motion or reciprocating sliding motion, but the sliding motion manner of the carrier 41 is closely related to the needs of sample rolling and should be suitably set according to actual needs, so it is not limited here. The control box support member 45 is connected to the support rod 51 and is used to support the first motor 43 and the motor control box 44.

[0025] Specifically, the temperature control component 3 further includes a temperature controller 33, which is electrically connected to the temperature control box 31 and is used to control the temperature of the inner cavity of the temperature control box 31. In this embodiment, the temperature controller 33 is composed of a temperature sensor, a transformer, an electromagnetic relay, a PID control circuit, a display meter, etc., and the temperature sensor collects the temperature in the temperature control box 31, and the electromagnetic relay controls the electric pulse, the PID control circuit controls the heating process, and the display meter can display the temperature in the temperature control box in real time, so as to realize the precise control of the temperature of the inner cavity of the temperature control box 31; in other embodiments, a suitable temperature controller can be designed according to actual needs, but is not limited here.

[0026] Specifically, the high-temperature rolling processing apparatus further includes an atmosphere supply mechanism 6, which includes a gas control box 61 and a gas storage tank 62, and the gas control box 61 communicates with the gas storage tank 62 and the inner cavity of the temperature control box 31 through a pipeline, respectively, and the gas control box 61 is used to control the flow rate and flow speed of the working gas export in the gas storage tank 62. The main reason for adding the atmosphere supply mechanism 6 in this embodiment is that some sample materials need to be processed in a protective gas environment when processed at high temperatures, and whether to use the atmosphere supply mechanism 6 can be adaptively selected according to actual processing needs and is not limited here.

[0027] Furthermore, based on the hot rolling method in the above first solution, the specific operation process of the hot rolling processing device will be described. The hot rolling processing device is used to toughen the surface of ceramics and semiconductor materials and improve the electrical and thermal properties of materials. Taking sheet-shaped materials as an example, the specific application includes the following steps: (1) The sample to be processed is placed on a transport cart, and the temperature control box is controlled so that the temperature is raised to a predetermined temperature at a rate of 0.5 to 5°C / min. Here, the sample to be processed must be at the predetermined temperature and must satisfy the condition that no cracks are generated and plastic deformation occurs, that is, an appropriate predetermined temperature must be selected according to the specific material of the sample, but the specific value of the predetermined temperature is not limited here.

[0028] (2) Controlling the force-applying component to maintain a predetermined temperature and apply a predetermined pressure, and controlling the rolling component to rotate at a predetermined rotational speed, and simultaneously controlling the carrier to reciprocate with a predetermined sliding period; wherein the predetermined rotational speed is 10-60 r / min, and the predetermined sliding period is 1 min.

[0029] (3) After the sample to be processed is pressed for a predetermined time, the temperature control box is cooled to room temperature at a rate of 2°C / min to obtain a sample having a residual compressive stress layer on the surface; the predetermined pressure and the predetermined time are adapted to the thickness of the residual compressive stress layer formed on the surface of the sample.

[0030] In the process of surface toughening for ceramic materials, a certain temperature, a certain rotation speed and a certain sliding period are limited, and the above-mentioned device is used to perform reciprocating rolling on the surface of the sample under high temperature environment by the method of high temperature and low speed rolling, and through physical processes such as dislocation nucleation, movement, atomic movement and grain reorganization, after the sample is cooled to room temperature, a residual compressive stress layer is formed on the surface; the traditional shot peening toughening method has a high speed and a large impact, which is easy to destroy the ceramic surface, while the present invention can effectively overcome the shortcomings of the traditional technology by applying static pressure to the sample, and the overall toughening process is slow, so that the destruction of the ceramic surface structure during the toughening process can be avoided. In addition, experimental research has shown that the main influencing factors of the thickness of the residual compressive stress layer formed on the surface of the sample are the predetermined pressure and the predetermined time, and the specific influencing factors include the rolling contact area of ​​the rolling component and the output frequency of the ultrasonic transducer, and by adjusting the above-mentioned influencing factors, the thickness and dislocation density of the residual compressive stress layer can be precisely controlled, and the specific process parameters need to be selected according to actual needs, which are not limited here.

[0031] It should be noted that the present invention describes the processing method of the seal-like material in detail, but the above-mentioned high-temperature rolling processing method can also be similarly processed on the surface of the sample with various structural forms such as shaft surface and hole-like to form a residual compressive stress layer. Referring to Figures 4-6, here, the adaptive improvement of the above-mentioned high-temperature rolling processing device is shown, and mainly represents the improvement of the rolling component to adapt to the processing of the cylindrical sample 8. In this embodiment, the rolling component is composed of a rolling bar 23, a rolling ball 24 and a ball shaft 25, one side of the end of the rolling bar 23 is provided with a groove for rotating the rolling ball 24, and the ball shaft 25 penetrates the rolling ball 24 and then both ends are connected to the rolling bar, so that the rolling ball 24 slightly protrudes into the groove on the side of the rolling bar 23, so that the high-temperature rolling operation can be performed on the outer wall or inner wall of the cylindrical sample 8, but the specific operation process is the same as above, so it will not be repeated here. Therefore, the above-mentioned high-temperature rolling processing method is not limited to the processing of seal-like materials, but can also be used to process samples with other surface structure forms; the processing parameters and equipment can be adjusted according to the surface form of the actual processed sample, but they will not be listed one by one here.

[0032] The processing effect of the above-mentioned high-temperature rolling compaction device will be described in detail below with reference to specific examples.

[0033] Example 1 In this embodiment, the material of the sample 7 to be processed is alumina ceramics, and silicon carbide balls are selected as the balls 22. First, the sample 7 is placed on the carrier 41, and the temperature control device 33 is controlled to control the temperature of the inner cavity of the temperature control box 31 to rise to a predetermined temperature at a rate of 5°C / min; after the predetermined temperature is reached, the force sensor 13 is used to monitor the force received by the sample 7 in real time, and the force-applying turntable 11 is rotated to adjust the applied force to a predetermined pressure; at the same time, the water-cooling component 18 is started to prevent the high temperature conduction of the temperature control box 31 from affecting the ultrasonic transducer 17. Then, the second motor 16 is started, and the third force transmission rod 15 drives the rolling component 2 to rotate along the axial direction, so that several balls 22 roll evenly on the surface of the sample, and the rolling speed gradually increases from 0 to 60 r / min; at the same time, the first motor 43 is started, and the transmission rod 42 drives the carrier 41 to reciprocate horizontally, so as to enlarge the rolling area of ​​the sample 7; at the same time, the signal generator 171b is started, and a voltage signal is sent out, which is transmitted to the power amplifier 171a to amplify the voltage signal, and then transmitted to the ultrasonic transducer 17, which generates ultrasonic vibration, which is transmitted to the rolling component 2 through the third force transmission rod 15, so that ultrasonic vibration is applied synchronously to the sample 7 during rolling, making the rolling surface smoother. After the rolling reaches a predetermined time, the temperature control box is slowly cooled to room temperature at a speed of 2°C / min, and the rolling process is completed, and the processing effect of the obtained test piece is as shown in FIG. 3.

[0034] In this embodiment, the predetermined temperature is set within the range of 800-1000°C, the predetermined pressure is 100N, and the predetermined time is 4 hours. The above-mentioned high-temperature rolling and testing are carried out at three predetermined temperature points of 800°C, 900°C, and 1000°C. The test results are shown in Table 1. The test results show that the surface roughness of the treated alumina ceramics is greatly improved, Ra is reduced from 3μm to 0.4μm, bending strength is improved by about 17%, hardness is improved by about 10%, fracture toughness is improved by more than 50%, wear resistance is also greatly improved, and no cracks are generated. This proves that the mechanical properties such as strength, hardness, fracture toughness, and wear resistance of the material can be improved by using the above-mentioned high-temperature rolling processing device to perform surface treatment on ionic and covalent bond materials, and at the same time, the occurrence of cracks during processing can be effectively avoided. At the same time, it is also shown that the setting parameters of "predetermined temperature 800-1000°C, predetermined pressure 100N, and predetermined time 4 hours" have a good processing effect on alumina ceramics.

[0035] [Table 1]

[0036] Example 2 In this embodiment, the material of the sample 7 to be processed is zirconia ceramics, and the high-temperature rolling process is the same as that in the first embodiment, but the main difference is that the processing parameters are adjusted; specifically, the predetermined temperature is 800 to 1200°C, and the predetermined pressure is 120The above-mentioned high-temperature rolling processing and test were carried out at three predetermined temperature points of 800°C, 1000°C, and 1200°C, with the test results shown in Table 2. The test results showed that the surface roughness after processing was significantly improved, the bending strength was improved by about 25%, the hardness was improved by about 5%, the fracture toughness was improved by more than 26%, and the wear resistance was also significantly improved, and no cracks were generated. This proves that the surface treatment of ionic and covalent materials using the above-mentioned high-temperature rolling processing device can improve the mechanical properties of the material, such as strength, hardness, fracture toughness, and wear resistance, and at the same time, it can effectively avoid the occurrence of cracks during processing. At the same time, it also shows that the setting parameters of "predetermined temperature 800-1200°C, predetermined pressure 120N, and predetermined time 4 hours" have a good processing effect on zirconia ceramics.

[0037] [Table 2]

[0038] Example 3 In this embodiment, the material of the sample 7 to be processed is lead zirconate titanate (PZT5), and the high-temperature rolling process is the same as that in the embodiment 1, but the main difference is that the processing parameters are adjusted; specifically, the predetermined temperature is 800-1000°C, the predetermined pressure is 50N, and the predetermined time is 4 hours. The above high-temperature rolling and testing are carried out at three predetermined temperature points of 800°C, 900°C, and 1000°C, and the test results are Table 4 As shown in the figure, the test results show that the surface roughness after treatment is greatly improved, bending strength is increased by about 17%, hardness is increased by about 4.5%, fracture toughness is increased by more than 22%, wear resistance is also greatly improved, and no cracks are generated. This proves that the surface treatment of ionic and covalent materials using the above-mentioned high-temperature rolling processing equipment can improve the mechanical properties such as strength, hardness, fracture toughness, and wear resistance of the material, and at the same time, effectively avoid the occurrence of cracks during processing. At the same time, it also shows that the setting parameters of "predetermined temperature 800-1000℃, predetermined pressure 50N, and predetermined time 4 hours" have a good treatment effect on lead zirconate titanate (PZT5).

[0039] [Table 3]

[0040] Example 4 In this embodiment, the material of the sample 7 to be processed is barium titanate ceramics (BTO), and the high-temperature rolling process is the same as that in Example 1, but the main difference is that the processing parameters are adjusted; specifically, the predetermined temperature is 800-1000°C, the predetermined pressure is 40N, and the predetermined time is 4 hours. The above-mentioned high-temperature rolling and testing are carried out at three predetermined temperature points of 800°C, 900°C, and 1000°C, and the test results are shown in Table 3. The test results show that the surface roughness after processing is greatly improved, the bending strength is improved by about 18%, the hardness is improved by about 14%, the fracture toughness is improved by more than 36%, the wear resistance is also greatly improved, and no cracks are generated. This proves that the use of the above-mentioned high-temperature rolling processing device to perform surface treatment on ionic and covalent materials can improve the mechanical properties such as strength, hardness, fracture toughness, and wear resistance of the material, and at the same time, it can effectively avoid the occurrence of cracks during processing. At the same time, it was also shown that the setting parameters of "specified temperature 800-1000°C, specified pressure 40N, specified time 4 hours" have a good processing effect on barium titanate ceramics (BTO).

[0041] [Table 4]

[0042] In addition, when electrical tests and thermal tests were performed on the sample processed in Example 1, it was found that the electrical conductivity of the alumina ceramics after the above-mentioned rolling processing increased by 28% and the thermal conductivity decreased by 16%. Since the electrical properties and thermal conductivity of the material can also be improved after surface treatment with ionic and covalent materials, it is also possible to design appropriate rolling processing parameters according to the needs for improving the electrical properties and thermal conductivity. Specifically, the electrical conductivity and thermal conductivity of the material are set in advance according to the thickness and dislocation density of the residual compressive stress layer formed on the sample surface, and there are no particular restrictions here.

[0043] Different from the prior art situation, the present invention provides a high-temperature rolling processing method and processing apparatus and its use, and by the coordinated arrangement of the force-imparting component, the rolling component, the temperature control component and the load component, precise high-temperature rolling processing can be achieved on the surface of the sample to be processed, and the mechanical and electrical properties of the sample after the rolling processing are greatly improved, and the thermal conductivity is greatly reduced, while the occurrence of cracks during processing is effectively avoided; and the electrical properties and thermal conductivity of the material can also be adjusted according to needs.

[0044] The above-described embodiments are merely representative of the manner in which the present invention is implemented, and the description is more specific and detailed, but should not be construed as limiting the scope of the patent of the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the spirit of the present invention, and these are also included in the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention is based on the appended claims. [Explanation of symbols]

[0045] 1-force application component, 11-force application turntable, 12-first force transmission rod, 13-force sensor, 14-second force transmission rod, 15-third force transmission rod, 16-second motor, 17-ultrasonic transducer, 171-ultrasonic control component, 171a-power amplifier, 171b-signal generator, 18-water cooling component, 2-rolling component, 21-ball fixing member, 22-ball, 23-rolling rod, 24-rolling ball, 25-ball shaft, 3-temperature control component, 31 - temperature control box, 32 - support stand, 33 - temperature control device, 4 - load component, 41 - carrier, 42 - transmission rod, 43 - first motor, 44 - motor control box, 45 - control box support member, 5 - frame mechanism, 51 - support rod, 52 - first fixing member, 53 - second fixing member, 54 - temperature control box support member, 55 - base, 6 - atmosphere supply mechanism, 61 - gas control box, 62 - gas storage tank, 7 - sample, 8 - cylindrical sample

Claims

1. A high-temperature rolling processing method, comprising the steps of: Heating the sample to be processed to a predetermined temperature, maintaining the predetermined temperature, and periodically rolling and compressing the surface of the sample to be processed by using a ball having a harderness than the sample at this temperature while applying a predetermined pressure to the surface of the sample; After the sample is compressed for a predetermined time, the sample is cooled to room temperature to obtain a sample having a residual compressive stress layer on the surface; the specimen undergoes plastic deformation without cracking at the predetermined temperature, and the predetermined pressure and time are adapted to a thickness of a residual compressive stress layer formed on the surface of the specimen; The sample is a ceramic, and the predetermined temperature is 800 to 1200° C. A high-temperature rolling compaction method.

2. A high-temperature rolling processing device, comprising: a force applying component, a rolling component, a temperature control component and a load component; The temperature control component includes a temperature control box and a support disposed within an interior cavity of the temperature control box; The load component includes a horizontally installed carriage, a transmission rod and a first motor, one end of the transmission rod is connected to the side of the carriage, and the other end of the transmission rod is connected to the rotating shaft of the first motor after penetrating the wall of the temperature control box, and the first motor is used to control the horizontal movement of the carriage; The force-imparting component is arranged along a vertical direction, and its bottom is connected to the rolling component after penetrating the temperature control box, and the bottom of the rolling component is abutted against the sample to be processed on the transport vehicle, and is used to perform high-temperature rolling of the ceramic sample to be processed at 800-1200°C; The hot rolling processing apparatus is used to carry out the hot rolling processing method according to claim 1. A high-temperature rolling processing device characterized by the above.

3. The force-imparting components include a coaxially arranged force-imparting turntable, a first force-transmitting rod, a force sensor, a second force-transmitting rod, a third force-transmitting rod, a second motor, and a water-cooling component; One end of the first force transmitting rod is connected to the center of the force applying turntable, the other end of the first force transmitting rod is coaxially connected to the top of the second force transmitting rod, and the force sensor is attached to the first force transmitting rod so as to be sleeved; The second force transmitting rod has a tubular structure, one end of the third force transmitting rod penetrates the bottom of the second force transmitting rod and then connects to the rotating shaft of the second motor, and the other end of the third force transmitting rod penetrates the temperature control box and then connects to the rolling component; The second motor controls the third force transmission rod to drive the rolling component to rotate along the axial direction. The high-temperature rolling processing apparatus according to claim 2.

4. The rolling component includes a ball fixing member and several balls, a top of the ball fixing member is connected to one end of the third force transmitting rod away from the second force transmitting rod, and several of the balls are movably fitted to a bottom of the ball fixing member, and several of the balls abut against the sample to be processed on the transport vehicle, and perform high-temperature rolling on the sample to be processed; When performing high-temperature rolling, the hardness of the ball is higher than the hardness of the sample to be processed. The high-temperature rolling processing apparatus according to claim 2.

5. The high-temperature rolling processing apparatus further includes a frame mechanism, the frame mechanism including several support rods, a first fixing member, a second fixing member, a temperature control box supporting member and a base; The several support rods are all arranged along a vertical direction, and the first fixing member, the second fixing member, the temperature control box support member and the base are all arranged horizontally and are all fixedly connected to the support rods so as to be perpendicular thereto; the first fixed member is disposed between the force-applying turntable and the force sensor, and the first force-transmitting rod movably passes through a central portion of the first fixed member; the second fixed member is fixedly connected to a second motor, and a second force transmitting rod and a third force transmitting rod both movably extend through a central portion of the second fixed member; The temperature control box support member is connected to the bottom of the temperature control box and the bottom of the support base. The high-temperature rolling processing apparatus according to claim 2.

6. The load component further includes a motor control box and a control box support member, the motor control box being electrically connected to the first motor and used to control the rotation speed and rotation direction of the first motor and control the slide speed of the transporter; The control box support member is connected to a support rod and is used to support the first motor and the motor control box. The high-temperature rolling processing apparatus according to claim 5.

7. The temperature control component further includes a temperature controller, the temperature controller being in electrical communication with the temperature control box and used to control the temperature of the internal cavity of the temperature control box. The high-temperature rolling processing apparatus according to claim 2.

8. The high-temperature rolling processing apparatus further includes an atmosphere supply mechanism including a gas control box and a gas storage tank, and the gas control box communicates with the gas storage tank and the internal cavity of the temperature control box through a pipeline, respectively, and the gas control box is used to control the flow rate and flow velocity of the working gas outlet in the gas storage tank. The high-temperature rolling processing apparatus according to claim 2.

9. The hot rolling machine is used to toughen the surface of ceramics and improve the electrical and thermal properties of the ceramics. Use of the high-temperature rolling processing apparatus according to any one of claims 2 to 8.

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