METHOD OF MANUFACTURING KNIFE CUTTER MATERIAL, KNIFE CUTTER MATERIAL AND KNIFE CUTTER

摘要

PROBLEM TO BE SOLVED: To manufacture a knife cutter material to be made into a knife cutter having a hard edge and toughness as a whole, to eliminate the early wear of the edge and to maintain the cutting quality by which a good cutting surface or slicing surface is obtained. ;SOLUTION: A billet B constituted by disposing boundary materials 2 and 2 which are intermediate metallic layers on both sides of a base metal 1 of a steel sheet which is a central steel layer and disposing cladding metals 3 and 3 of steel sheets which are outer steel layers on both sides of the boundary materials 2 and 2. Next, the billet B is then forged or hot rolled, by which the base metal l, the boundary materials 2 and 2 and the cladding metals 3 and 3 are joined and the knife cutter material consisting of a five-layered structure arranged with the outer steel layers held with the intermediate metallic layers on both sides of the central steel layer is manufactured. The diffusion of carbon from the base metal to the cladding metals can be prevented in forging or hot rolling by using niobium(Nb) or tantalum(Ta) as the boundary materials.;COPYRIGHT: (C)2003,JPO