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:
Apr. 19, 2005
Filed:
Jun. 11, 2002
Satoshi Ohtani, Kyoto, JP;
Naoto Okazaki, Kyoto, JP;
Kiyoshi Ogata, Kyoto, JP;
Haruyo Fukui, Itami, JP;
Miki Irie, Itami, JP;
Yoshiharu Utsumi, Itami, JP;
Hisanori Ohara, Itami, JP;
Hideki Moriguchi, Itami, JP;
Akihiko Ikegaya, Itami, JP;
Keiichi Tsuda, Itami, JP;
Makoto Setoyama, Kyoto, JP;
Satoshi Ohtani, Kyoto, JP;
Naoto Okazaki, Kyoto, JP;
Kiyoshi Ogata, Kyoto, JP;
Haruyo Fukui, Itami, JP;
Miki Irie, Itami, JP;
Yoshiharu Utsumi, Itami, JP;
Hisanori Ohara, Itami, JP;
Hideki Moriguchi, Itami, JP;
Akihiko Ikegaya, Itami, JP;
Keiichi Tsuda, Itami, JP;
Makoto Setoyama, Kyoto, JP;
Sumitomo Electric Industries, Ltd, Osaka, JP;
Nissin Electric Co., Ltd., Kyoto, JP;
Abstract
An amorphous carbon coated tool includes a base material of WC base cemented carbide, and an amorphous carbon film formed on this base material. The cobalt content in the base material is at least 12% by mass. The maximum thickness of the amorphous carbon film is at least 0.05 μm and not more than 0.5 μm at the cutting edge. The amorphous carbon film is deposited with graphite as the source material by physical vapor deposition in an atmosphere substantially absent of hydrogen. The amorphous carbon film coated tool superior in wear resistance and adhesion resistance is preferably applicable to rotating tools such as drills, end mills and reamers, indexable inserts used for milling cutters and turning tools, and cutting-off tools such as cutters, knives, or slitters.