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:
Aug. 30, 2022
Filed:
Jul. 16, 2020
Sumitomo Electric Hardmetal Corp., Itami, JP;
SUMITOMO ELECTRIC HARDMETAL CORP., Itami, JP;
Abstract
A cutting tool comprises a rake face and a flank face, the cutting tool being composed of a substrate made of a cubic boron nitride sintered material and a coating provided on the substrate, the coating including a MAlN layer, the MAlN layer including crystal grains of MAlN in the cubic crystal system, n<nbeing satisfied, where nrepresents a number of voids per 100 μm in length of the MAlN layer on the flank face in a cross section of the MAlN layer, and nrepresents a number of voids per 100 μm in length of the MAlN layer on the rake face in a cross section of the MAlN layer, nbeing 3 or less, where nrepresents a number of droplets per 100 μm in length of the MAlN layer on the flank face in a cross section of the MAlN layer.