The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2013
Filed:
Jul. 29, 2009
Hideyoshi Kinoshita, Satsumasendai, JP;
Takashi Tokunaga, Satsumasendai, JP;
Hideyoshi Kinoshita, Satsumasendai, JP;
Takashi Tokunaga, Satsumasendai, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
Provided is a cutting tool which comprises a sintered cermet having high toughness and thermal shock resistance. The cutting tool, namely a tip, comprises a sintered cermet comprising: a hard phasecomprising one or more selected from among carbides, nitrides, and carbonitrides which comprise mainly Ti; and a binder phasecomprising mainly at least one of Co and Ni. The tiphas a cutting edgelying along an intersecting ridge portion between a rake faceand a flank face, and a nose. The hard phasecomprises a first hard phaseand a second hard phase. When a residual stress is measured on the rake faceby 2D method, a residual stress σ] of the first hard phasein a direction (σdirection), which is parallel to the rake faceand goes from the center of the rake faceto the nose being the closest to a measuring point, is 50 MPa or below in terms of compressive stress (σ]=−50 to 0 MPa), and a residual stress σ] of the second hard phasein the σdirection is 150 MPa or above in terms of compressive stress (σ]≦−150 MPa).