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:
Jun. 03, 2025
Filed:
Apr. 01, 2021
Sumitomo Electric Industries, Ltd., Osaka, JP;
Takato Yamanishi, Osaka, JP;
Keiichi Tsuda, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A base material according to an aspect of the present disclosure is made of a cemented carbide. The cemented carbide includes a first hard phase and a binder phase. The first hard phase consists of WC particles. The binder phase includes at least one element selected from Co and Ni. The base material includes a body portion, and a surface portion provided on a surface of the body portion. The surface portion has a thickness less than or equal to an average particle size in the first hard phase. A ratio (B/A) of an area proportion (B) of the binder phase in a surface of the surface portion to an area proportion (A) of the binder phase in a cross section of the body portion is not less than 1.2 and not more than 2.0.