Crater wear of TiN coated high speed steel tool inserts

Abstract

This paper reports the crater wear characteristics of TiN coated high speed steel (HSS) tool inserts during single point dry turning operations. Experimental data obtained from carefully executed single point dry turning tests as well as from the technical literature enabled the construction of wear maps showing the crater wear behaviour of these tools over a wide range of machining conditions. The maps show that there is a safety zone (defined by a range of feedrate and cutting speed) within which the rates of crater wear are the lowest. The concept of an overall wear damage map for TiN coated HSS tool inserts is discussed and such a map for this group of coated tools is presented for the first time.