A review of high-speed intermittent cutting of hardened steel

In the present study, an attempt is performed to critically review researches on cutting forces, cutting temperature, tool failure mechanisms, and surface roughness in intermittent cutting of hardened steel. Former studies provided much valuable information. However, some limitations can still be identified. For the purpose of having a thorough understanding of intermittent hard cutting, cutting performance of some other suitable tool materials should also be investigated. More researches on high-speed face milling of hardened steel should be conducted. More studies are needed to focus on the characteristics which arise at higher cutting speed in intermittent hard cutting. Development of intensity and area of heat source in milling should be paid attention to, so that accurate analysis of transient cutting temperatures in hard milling can be conducted. Damage mechanics can be considered as a bridge between the analysis of microscopic damage and macroscopic fracture of the tool material in intermittent hard cutting.