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:
Feb. 06, 2001
Filed:
Dec. 03, 1998
Hideki Moriguchi, Itami, JP;
Akihiko Ikegaya, Itami, JP;
Nobuyuki Kitagawa, Itami, JP;
Katsuya Uchino, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A coated hard metal for a cutting tool is excellent in wear resistance and chipping resistance. The coated hard metal includes a hard coating layer on a surface of a base material of cemented carbide or cermet. The hard coating layer includes an inner layer (,) on the base material (,), an intermediate layer (,) on the inner layer (,) and an outer layer (,) on the intermediate layer (,). The inner layer (,) consists of a carbide, a nitride, a carbo-nitride, a carbo-oxide, a carbonitrogen oxide or a boronitride of Ti. The intermediate layer (,) consists of Al,O,or ZrO,. The outer layer (,) consists of a carbide, a nitride, a carbo-nitride, a carbo-oxide, a carbonitrogen oxide or a boronitride of Ti. The thickness of the inner layer (,) is 0.1 to 5 &mgr;m, the thickness of the intermediate layer (,) is 5 to 50 &mgr;m in the case of it being an Al,O,layer and 0.5 to 20 &mgr;m in the case of it being a ZrO,layer, and the thickness of the outer layer (,) is 5 to 100 &mgr;m.