US Patent 7799438 Surface-coated cutting tool and method for producing same

Patent 7799438 was granted and assigned to Mitsubishi Materials on September, 2010 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Mitsubishi Materials

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

77994380

Patent Inventor Names

Tsuyoshi Ogami0

Yusuke Tanaka0

Date of Patent

September 21, 2010

Patent Application Number

115706920

Date Filed

December 28, 2004

Patent Primary Examiner

‌

Aaron Austin

Patent abstract

A surface-coated cutting tool comprising a cutting tool body, and a hard coating layer formed on a surface of the cutting tool body. The hard coating layer comprises an upper layer comprising chromium boride and a lower layer comprising a composite nitride containing Ti and Al. The composite nitride preferably satisfies a composition formula: (Ti1-XAlX)N, where X is in a range from 0.40 to 0.75 by atomic ratio.

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