【摘 要】
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Surface texturing is the process of applying a specific pattern of roughness onto a surface in order to improve its tribological properties. In this paper, the micro/nano texture was fabricated on the
【机 构】
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College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics,
【出 处】
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第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
论文部分内容阅读
Surface texturing is the process of applying a specific pattern of roughness onto a surface in order to improve its tribological properties. In this paper, the micro/nano texture was fabricated on the cemented carbide tool surface by pulsed laser. The influences of laser parameters such as laser power, scanning velocity and pulse frequency were investigated to obtain the optimized process. Besides, the formation of the micro/nano texture was analyzed. Then the wettability of the micro/nano textured surface was measured, and the results showed that the water contact angle and oil contact angle of the micro/nano textured tool could be achieved to 147±3° and 135±3°, respectively. The tribological properties of the untextured surface and micro/nano textured surface with different wettability were investigated experimentally and the influence of crank speed and contact pressure on the tribological properties was studied. The results indicated that the friction coefficient of the surface decreased with the increasing crank speed and contact pressure. Compared to the untextured surface, both the micro/nano textured surface and the textured lyophobic surface could effectively reduce the friction coefficient. The improvement in tribological properties of micro/nano textured surface could be attributed to the texture and low wettability, which was beneficial to rapid accumulation of the lubricating oil on the tool surface. This method, which could be utilized for fabricating micro/nano textured tool with low wettability, can further promote the research in drag friction of tools and shows a significant potential in reducing tool wear and prolonging tool life.
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