Investigating the Effect of Cutting Parameters on Surface Roughness and Flank Wear in the Interrupted Hard Turning of Hardened SKD 11 Steel using High CBN Inserts

Hard turning is a potential machining process to replace for grinding process due to large advantages such as material removal rate, good surface integrity, and friendly environment. This process is also used to process discontinuous surface parts. This study focuses on analyzing the effect of cutting parameters on surface roughness and flank wear after interrupted hard turning of SKD11 steel using CBN inserts. The effect of cutting parameters and interacted between them on the surface roughness and the flank wear were analyzed by using the full factorial design having the central trials. The results investigated that the feed rate is the most significant parameter affecting on the surface roughness in the machining process and the cutting speed strongly affects on the flank wear in the interrupted hard turning of SKD11 steel using high CBN inserts. The results of ANOVA analysis for the surface roughness and the flank wear indicated that the need to investigate and use the curve model to describe the effect of the cutting parameters on the surface roughness and the flank wear.