Study of dry sliding friction and wear behavior of bionic surface of hardened steel

摘要

Considering typical bionic wear-resistant non-smooth surfaces, including prototypes such as the surface pits of a dung beetle body and desert viper abdomen, hardened steel mold wear samples for simulating the morphologies of the rectangular pits on a dung beetle body surface and the regular hexagonal pits on a desert viper abdomen were prepared by high-speed milling and controlling the ratio of row spacing to feed rate. The tribo-logical behaviors of finite element models with smooth grinding and different bionic pit shapes were numerically simulated. The wear test was performed on the wear sample using a friction and wear test bench, and the wear morphology of the sample surface was observed using an ultra-depth of field three-dimensional microscope. The results show that under the condition of dry sliding friction, the rectangular pit surface imitating the dung beetle body surface has better drag reduction and wear resistance. The surface energy of the rectangular pits on the body surface of dung beetles can significantly improve the surface friction stress and temperature distribution, and reduce the wear of hardened steel molds. Furthermore, the friction and wear tests demonstrate good characteristics of debris collection and storage; thus, reducing the friction resistance.