Patent ID: 7413591
Filing Date: 2008-08-19
Classification: B22F,C22C,C23C,Y10T

Abstract:
1. A throw-away tip satisfying the following constituent features (a) to (d) used for machining a workpiece with a cutting edge applied thereto: (a) the throw-away tip comprises 1 to 30% by weight of a binder phase comprising at least one kind of Co and Ni, and 70 to 99% by weight of a carbonitride phase comprising carbonitride of Ti and one or more kind other than Ti among metals of groups 4a, 5a and 6a of the Periodic Table; (b) a mean grain size of the carbonitride phase is 1.5 μm or less; (c) the shape is substantially flat plate; and (d) flexural strength including the side faces of the throw-away tips show a Weibull coefficient of 9.8 or higher for the flexural strength.