The performance of industrial use tree shape tungsten carbide burrs in high temperature environment is related to their processing accuracy and service life. This issue needs to be analyzed from many aspects such as material properties, structural changes and the interaction of the processing process. Tungsten carbide itself is a material with extremely high hardness and good wear resistance. It can stably perform cutting functions at room temperature, but high temperature environment will break its originally stable performance state. High temperature will intensify the thermal motion of atoms inside the material, causing subtle changes in the originally tightly arranged crystal structure. This microscopic change is the root cause of the performance of rotary files.
The effect of high temperature on the hardness of tungsten carbide rotary files cannot be ignored. Hardness is the key performance indicator for rotary files to achieve efficient cutting, and under the action of high temperature, the hardness of tungsten carbide will gradually decrease. As the temperature continues to rise, the chemical bond energy inside the material changes, and the bonding force between atoms weakens, making the rotary file more prone to wear when it contacts and cuts with the workpiece. The sharp edge that can easily cut hard materials gradually loses its advantage in high temperature, the cutting efficiency is reduced, and even the edge may collapse, affecting the processing accuracy and the surface quality of the workpiece.
Wear resistance, as an important characteristic of tungsten carbide rotary files, also faces challenges in high temperature environments. When the rotary file is working, the friction with the workpiece surface will generate a lot of heat, and the high temperature further aggravates this wear process. High temperature will soften the material on the surface of the workpiece, making it easier to adhere to the surface of the rotary file, forming a built-up edge. The built-up edge will not only change the shape of the cutting edge of the rotary file and affect the cutting effect, but will also fall off continuously during the rotation process, taking away part of the tungsten carbide material and accelerating the wear of the rotary file. At the same time, high temperature will also cause the oxide film on the surface of the rotary file to continue to form and peel off, further weakening its wear resistance.
High temperature will also affect the structural stability of the rotary file. Industrial use tree shape tungsten carbide burrs are usually composed of a cutter body and a shank, which are connected by welding or other means. In a high temperature environment, the difference in thermal expansion coefficients of different materials will cause stress at the connection. If this stress accumulates to a certain extent, the connection between the cutter body and the shank may loosen or even fall off, causing equipment failure and safety hazards. Moreover, high temperature may cause the micro cracks inside the rotary file to expand. These cracks may be stable at room temperature, but under the dual effects of high temperature and cutting force, they will develop rapidly, and eventually affect the overall strength and service life of the rotary file.
The cutting performance of the rotary file will also change under high temperature environment. Due to the decrease in hardness and wear resistance, the rotary file needs to apply more force to achieve the same cutting effect during cutting, which not only increases the load of the processing equipment, but also may cause the workpiece to deform. At the same time, the high temperature generated during the cutting process will change the physical properties of the workpiece material. For example, the metal material may anneal, the hardness will decrease, and the organizational structure will change, thus affecting the subsequent processing procedures. The unstable cutting state of the rotary file at high temperature will also increase the roughness of the machined surface, which cannot meet the requirements of high-precision processing.
In order to cope with the impact of high temperature environment on performance, a series of measures need to be taken when designing and using industrial use tree shape tungsten carbide burrs. In terms of materials, tungsten carbide can be modified and other alloy elements can be added to improve its high temperature stability and oxidation resistance; in terms of structural design, the connection between the cutter body and the handle can be optimized to enhance the structure's resistance to thermal stress. During use, it is crucial to adopt a suitable cooling method, using coolant or compressed air to promptly remove the heat generated by cutting, reduce the temperature of the rotary file and the workpiece, and reduce the impact of high temperature on performance. At the same time, the cutting parameters should be reasonably controlled to avoid excessive heat generated by excessive cutting speed and feed rate.
The performance of industrial use tree shape tungsten carbide burrs will change significantly in high temperature environments, and will be affected to varying degrees from hardness, wear resistance to structural stability and cutting performance. Only by understanding these changes and taking targeted measures to deal with them can the performance advantages of rotary files be fully utilized in high temperature processing environments, ensuring processing quality and efficiency, extending the service life of rotary files, and meeting the diverse needs of industrial production.
