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Frictional Performance Assessment of Cemented Carbide Surfaces Textured by Laser

机译:激光纹理碳化物表面的摩擦性能评估

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Cemented carbides are advanced engineering materials often used in industry for manufacturing cutting tools or supporting parts in tribological system. In order to improve service life, special attention has been paid to change surface conditions by means of different methods, since surface modification can be beneficial to reduce the friction between the contact surfaces as well as to avoid unintended damage. Laser surface texturing is one of the newly developed surface modification methods. It has been successfully introduced to fabricate some basic patterns on cemented carbide surfaces. In this work, Direct Laser Interference Patterning Technique (DLIP) is implemented to produce special line-like patterns on a cobalt (Co) and nickel (Ni) based cemented tungsten carbide grade. It is proven that the laser-produced patterns have high geometrical precision and quality stability. Furthermore, tribology testing using a nano-tribometer unit shows that friction is reduced by the line-like patterns, as compared to the polished one, under both lubricated and dry testing regimes, and the reduction is more pronounced in the latter case.
机译:粘合碳化物是用于制造工业生产工具的先进工程材料,用于制造切割工具或摩擦学系统的配套零件。为了改善使用寿命,通过不同的方法,特别注意改变表面状况,因为表面改性可能有利于降低接触表面之间的摩擦,并避免意外损坏。激光表面纹理是新开发的表面改性方法之一。已经成功地介绍了在硬质合金表面上制造一些基本模式。在这项工作中,实施直接激光干涉图案化技术(DLIP)以在钴(CO)和镍碳化钨等级的钴(CO)和镍(Ni)上产生特殊的线状图案。证明激光产生的图案具有高几何精度和质量稳定性。此外,使用纳米摩擦计单元的摩擦学测试表明,与润滑性和干燥测试制度的抛光剂相比,通过线状图案减小了摩擦,并且在后一种情况下,还原更加明显。

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