Wear Performance of Ti-Al-N Coated and Cryogenically Treated Cermet Tools While Machining Aisi 4340 Steel

This research work presents the results of an experimental investigation on wear study of cermet cutting tools during machining of AISI 4340 steel (45 HRC). The cryogenic treatment and Ti-Al-N coating were performed over cermet inserts substrate. The four different cermet inserts such as cryogenically treated (Tool 2), cryogenically treated and subsequently Ti-Al-N coated (Tool 4), Ti-Al-N coated (Tool 3) and plain cermet (Tool 1) were taken. Experiments were performed to evaluate the tool wear at different machining conditions. Result indicated that cryogenically treated and subsequently Ti-Al-N coated cermet cutting tool performs better than other cermet cutting tools.