Patent ID: 6571493
Filing Date: 2003-06-03
Classification: B22F,E01H,E02F

Abstract:
A cutting edge comprising an edge body mounted on a blade and a hard member provided at a leading end of the edge body,wherein the hard member comprises: a first hard material containing hard grains which are dispersed with high filling density and are integrally combined by a metal having a lower melting point than the hard grains; and a protective member which covers at least a front face of the hard material as viewed in the travel direction of the blade and which has impact resistance, wherein said first hard material contains hard grains consisting solely of large diameter hard grains having diameters of 1 mm or more distributed in the entire area of the hard material with small diameter hard grains having diameters of 0.5 mm or less filling gaps between the large diameter hard grains.