Hardening of machined surface by micro cutting of chrome molybdenum steel

Abstract

High-hardness steels, which are often used as materials for machine element parts, are considered to have poor machinability because they are quenched and tempered and have excellent mechanical properties and wear resistance. In this study, we experimentally examined the effect of micron-level depth of cut on the hardness of chrome molybdenum steel using commercially available PVD-coated cemented carbide tools. The results showed that the change in hardness varied greatly depending on whether the tool was quenched or not, and that the hardening was more pronounced in the quenched area.