激光微織構(gòu)WC-Co涂層刀具的性能研究
[Abstract]:In order to improve the comprehensive performance of cutting tools, surface treatment is often needed. At present, a variety of coating technology has been widely used on the surface of cutting tools, and a series of high-end cutting tools products have emerged. Due to its unique advantages, some scholars at home and abroad have begun to carry out pioneering and exploratory research on the surface of cutting tools in recent years, and some encouraging preliminary results have been obtained. The application of laser microtexture technology and surface coating on the surface of cutting tools and the integrated gain effect are very curious and expectant. Therefore, this paper attempts to combine the laser microtexture technology with the surface coating deposition technology, through the simulation and experimental research methods, to investigate, verify the laser texture technology integrated surface coating technology, the influence and effect of laser texture technology on the cutting performance of the cutting tool. The main contents of this paper are as follows: (1) on the basis of metal cutting theory, a two-dimensional cutting simulation model is established by using ABAQUS software, and the cutting forces of two kinds of coated tools with different textures are investigated under the same cutting conditions. Cutting temperature and other cutting performance. The simulation results show that the stress concentration and temperature concentration of textured coated cutting tools are prominent, which mainly focus on the protruding region of the textured surface. The distribution of stress and temperature in other regions is more uniform than that in concave cavity. (2) the experimental study of laser texturing process on cemented carbide surface has been carried out, and the influence of single pulse energy and pulse number on the size of textured morphology has been obtained. On this basis, the microtexture cutting tool samples were prepared, and the TiAlN coating was deposited on the tool surface by magnetron sputtering equipment, and the related properties of the coating were measured by electron microscope, hardness tester and X-ray. The results show that the microtexture morphology has little effect on the hardness of the coating, but it can reduce the residual stress on the substrate surface. (3) the concave texture coated tool and the woolen texture coating tool are prepared by using the parameters of the experimental results. Two kinds of textured coated tools and untextured coated tool samples were tested and compared with each other. The experimental results show that the cutting force, cutting temperature and chip crimping performance of the two textured coated tools are better than those of the untextured coated tools at different cutting speeds. At the same cutting speed, the microtexture morphology has little effect on the cutting performance of the tool, but it is superior to that of the untextured coated cutter.
【學(xué)位授予單位】:江蘇大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TG711;TG665
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