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:
Sep. 01, 2015
Filed:
Oct. 18, 2011
Yusuke Matsuda, Itami, JP;
Katsumi Okamura, Itami, JP;
Satoru Kukino, Itami, JP;
Sumitomo Electric Hardmetal Corp., Itami-shi, JP;
Abstract
cBN sintered body includes cBN and a binder phase, wherein a content of the cBN is 82-98 volume %, and in a cross section of the cBN sintered body, an isolated binder phase having an area of 0.05-0.5 μmhas a protrusion of two or more steps, and assuming that in a first-step protrusion, Arepresents a side length which is perpendicular in a tip direction, and Brepresents a side length which is parallel in the tip direction; and in a second-step protrusion, Arepresents a side length which is perpendicular in the tip direction, and Brepresents a side length which is parallel in the tip direction, an area ratio of an isolated binder phase having a protrusion in which ABis 1-10 times of AB, to the whole of the binder phase having the area of 0.05-0.5 μm, is 25% or more.