An Investigation on Machinability of Hardened AISI H10A Steel with CBN insert
Rıfat Akdere Halil DEMİR Gültekin Uzun Mustafa GÜNAY
AbstractIn this study, machinability experiments on hardened AISI H10A hot work tool steel with CBN inserts were performed in dry and minimum quantity lubrication (MQL) conditions. Hard turning experiments were conducted according to Taguchi L9 orthogonal array. The effects of cutting parameters (cutting speed, feed rate and depth of cut) and cutting conditions on surface roughness were analysed. The analysis of variance (ANOVA) in 95% confidence level was applied in order to effects of cutting parameters surface roughness. It was observed that average surface roughness (Ra) increased with increasing feed rate and depth of cut in dry cutting condition with CBN inserts. In dry and MQL cutting conditions, the most important parameter on surface roughness were determined as depth of cut with 51.79% PCR and 69.68% PCR, respectively.