Surface topography creation of machine elements after carburizing process with application of burnishing method

Abstract

Various types of bushings or pins are widely used in the machinery industry, i.e. in the automotive industry, agricultural machinery and production lines. Such machine components operate in a diverse environment, not infrequently in polluted or dusty environments and these components may be subjected to intensive wear. Particles circulating in various types of machine kinematic pairs contribute to accelerated or even emergency wear of the equipment. One way to prevent such dangerous failures is to use an additional machining to create dimples in the surface, which are a place to collect lubricant but also abrasive particles. The article presents a method of burnishing a cylindrical surface after carburizing treatment and after hardening, after which the hardness of the surface layer was about 60 HRC. As a result of using appropriate tools, it was possible to create regular and reproducible dimples in the surface. A surface topography parameter was also proposed, which makes it possible to evaluate the increase in oil capacity of the created cavities quickly and with high quality standards.