Title:
高強度歯車、伝動機構及び高強度歯車の製造方法
Document Type and Number:
Japanese Patent JP4968715
Kind Code:
B2
Abstract:
A high strength gear used as an element of a power transmission mechanism. The gear includes a base gear formed of an iron-based alloy subjected to carburizing or carbonitriding treatment. The base gear has an engaging surface with which an opposite gear is engaged. The engaging surface of the base gear is coated with a first diamond-like carbon film which has a hydrogen content of not more than 10 atomic % and a surface hardness ranging from 8 to 30 GPa in a nano-indentation test. Additionally, at least a part of the first diamond-like carbon film is coated with a second diamond-like carbon film which has a hydrogen content of not more than 10 atomic % and a surface hardness ranging from 50 to 90 GPa in the nano-indentation test. The second diamond-like carbon film has a surface roughness Ra ranging from 0.1 to 0.2 µm.
Inventors:
Takuro Yamaguchi
Kenji Yamamoto
Kenji Yamamoto
Application Number:
JP2006207697A
Publication Date:
July 04, 2012
Filing Date:
July 31, 2006
Export Citation:
Assignee:
Nissan Motor Co., Ltd
KABUSHIKI KAISHA KOBE SEIKO SHO
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
F16H55/06; C23C14/06
Domestic Patent References:
| JP2002322555A | ||||
| JP2006124806A | ||||
| JP2004010923A | ||||
| JP2004269991A | ||||
| JP2005061610A | ||||
| JP2004137535A |
Attorney, Agent or Firm:
Janggi Motonori