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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.:

US 9878374 B1

PDFFull Text
Date of Patent:
Jan. 30, 2018

Filed:

Jul. 13, 2015

Surface-coated cutting tool

Applicant:

Sumitomo Electric Hardmetal Corp., Itami-shi, JP;

Inventors:

Anongsack Paseuth, Sorachi-gun, JP;

Hideaki Kanaoka, Sorachi-gun, JP;

Takanori Detani, Sorachi-gun, JP;

Shinya Imamura, Sorachi-gun, JP;

Assignee:

SUMITOMO ELECTRIC HARDMETAL CORP., Itami-shi, JP;

Attorneys:

Venable LLP

Michael A. Sartori

Miguel A. Lopez

Primary Examiner:

Archene Turner

Int. Cl.
CPC ...
B23B 27/14 (2006.01); C30B 25/14 (2006.01); C30B 25/10 (2006.01); C30B 29/20 (2006.01); C30B 33/02 (2006.01); C23C 16/36 (2006.01); C23C 16/40 (2006.01); C23C 16/56 (2006.01);
U.S. Cl.
CPC ...
B23B 27/148 (2013.01); C23C 16/36 (2013.01); C23C 16/403 (2013.01); C23C 16/56 (2013.01); C30B 25/10 (2013.01); C30B 25/14 (2013.01); C30B 29/20 (2013.01); C30B 33/02 (2013.01); B23B 2224/04 (2013.01); B23B 2224/32 (2013.01); B23B 2228/04 (2013.01); B23B 2228/105 (2013.01);
Abstract

A surface-coated cutting tool according to the present invention is provided with a base material and a coating formed on the base material, the coating includes an α-AlOlayer, the α-AlOlayer includes a plurality of crystal grains of α-AlOand shows (001) orientation, a grain boundary of the crystal grains contains a CSL grain boundary and a general grain boundary, and a length of a Σ3 crystal grain boundary out of the CSL grain boundary exceeds 80% of a length of a Σ3-29 crystal grain boundary and is equal to or more than 10% and equal to or less than 50% of the total length of all grain boundaries which is the sum of the length of the Σ3-29 crystal grain boundary and a length of the general grain boundary.

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