激光织构仿生非光滑表面抗磨性能研究

Investigation on Anti-Wear Ability of Bionic Nonsmooth Surfaces Made by Laser Texturing

采用激光织构技术在材料表面形成4种仿生非光滑表面形态,分析了织构表面金相组织结构,考察了其抗磨性能.结果表明,材料表面经激光织构处理后形成了微细的硬质金相组织,这有利于提高表面的抗磨性能;而将这种激光表面织构技术用于仿生非光滑表面形态,可以进一步提高表面的抗磨性能;其中经激光织构处理的鳞片形非光滑表面的抗磨性能最佳.

Laser texturing technique was employed to prepare four kinds of bionic non-smooth morphological patterns on roll model specimens. The metallographic structures of the laser-textured surfaces were observed on a TV-photograph microscope and an optical microscope. The friction and wear behaviors of the laser-textured surfaces were investigated by MM-200 test rig, using the untreated specimen of a smooth surface to control. It was found that superfine and hard metallurgical structures are generated on the modified surfaces after laser texturing, which contributes to significantly increase the wear resistance. The bionic non-smooth morphological patterns also contribute to greatly increase the wear resistance, and the laser-textured surface with squama non-smooth pattern has the best wear resistance.