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:
Oct. 28, 2025
Filed:
Jun. 18, 2024
Sumitomo Electric Hardmetal Corp., Itami, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Abstract
A cemented carbide includes 65 to 85 volume % of a first phase and 4 to 25 volume % of a second phase, wherein the first phase consists of carbide grains, the second phase includes 50 mass % or more of cobalt, the second phase includes zirconium, a cobalt content ratio Mof the cemented carbide is 3 to 15 mass %, a and b of the cemented carbide indicate a relation of the following formula I:<0.0485+0.0001 I, wherea represents a percentage, (M/M)×100, of a zirconium content ratio Min mass % with respect to the cobalt content ratio Min mass %, a is more than 0 and 8 or less, b represents an area percentage of pore in a first region of the cemented carbide, and the first region is a region located within a distance of 50 μm from a surface of the cemented carbide in the cross section.