Patent ID: 8002858

Claim:
A cutting segment, comprising: a plurality of layers, each comprising layers of diamond particles, and two kinds of plate-shaped metal matrix layers comprising at least one soft metal matrix layer having relatively high ductility and at least one hard metal matrix layer having relatively low ductility, wherein the hard metal matrix layer is constructed of steel, and the soft metal matrix layer is constructed of a material selected from the group consisting of aluminum alloys, low melting point nickel alloys, copper alloys, silver alloys, and brass, wherein the two kinds of plate-shaped metal matrix layers are arranged perpendicular to a cutting surface while being parallel to a cutting direction, and are alternately stacked perpendicular to the cutting direction, and wherein each layer of diamond particles has diamond particles, a portion of each diamond particle being located in the soft metal matrix layer and the other portion of each diamond particle being located in the hard metal matrix layer, the diamond particles being positioned in a row of diamond particles on the cutting surface.