Anti-wear properties on 20CrMnTi steel surfaces with biomimetic non-smooth units

Abstract

In order to gain a sufficient wear resistance for applications, the biomimetic non-smooth units in concave were fabricated on the surfaces of 20CrMnTi steel using a biomimetic laser remelting technology. The diameter and distribution of the concaves were optimized using orthogonal experiment. The microstructures of the biomimetic non-smooth units were examined. The anti-wear behaviors were investigated by the rolling wear test with lubricant. The results of wear tests indicated that the biomimetic surfaces exhibit a higher anti-wear ability than the smooth surfaces. The biomimetic surface with concaves of 250 μm in diameter and transverse distance of 270 μm and longitudinal distance of 400 μm exhibits the best anti-wear property. The enhancement of wear resistance can be mainly attributed to the action of biomimetic non-smooth units and the super fined microstructure and hardness in the biomimetic unit zones. biomimetic unit, concave, orthogonal experiment, anti-wear, 20CrMnTi Citation:Hu Y, Han Z W, Xu M X, et al. Anti-wear properties on 20CrMnTi steel surfaces with biomimetic non-smooth units.

Comparative tribological performance of a-C:H, ta-C and AlCrSiN coatings on 20CrMnTi gear steel under dry sliding condition

“…But, the surface roughness of LSMSSP gears was generally improved. Yong et al (Hu et al , 2010) used bionic laser remelting technology to prepare concave bionic nonsmooth units on the surface of 20CrMnTi steel, which significantly improved the wear resistance. This is mainly due to the role of bionic nonsmooth units and the hyperfine structure of biomimetic unit.…”