Laser Engraving Bionic Non-smooth Surface Wear Resistance

The wear was one of the reasons of the part inactivation, and the researchers looked for the methods to improve wear resistance. Bionic workman found that the animals living in the soil often shuttled in the soil and sand, but it was not hurt at all. Their cuticle universally exists unsmooth morphology, which can reduce resistance and enhanced wear resistance. So it took us to a new path to enhance wear resistance of material.The distributing models of four kinds of bionic unsmooth topography were designed in the paper, and the processed principles of four kinds of bionic unsmooth topography were analysised。 Four kinds of bionic unsmooth topography-convex , concave, ripple and squama were made by laser carving on the surface of high speed steel.The microstructure of laser treated layer was analysised by means of scanning electron microscopy, energy spectrometer, optical microscopy and x-ray diffraction. Hardness distribution of laser treated layer and four kinds of Bionic unsmooth surface were measured by means of hardness tester.The wear resistance of four kinds of bionic nonsmooth surface, laser remelting surface and smooth surface were investigated and compared by means of ML-100 wear testing machine. The experiment was shown that the wear resistance of bionic unsmooth squama surface was best in these surface, in turn bionic unsmooth ripple surface, bionic unsmooth concave surface , bionic unsmooth convex surface, laser remelting surface and smooth surface. The mechanism of wear resistance of bionic unsmooth surface was investigated, and The reason for abrasive wear resistance enhancement of bionics nonsmooth surface was grains super-refining strengthening, solution strengthening and the effect of bionics and dowel pin.Regularities of distribution of Bionic unsmooth suqama surface and bionic unsmooth ripple surface was investigated.