Title:
METHOD FOR PRODUCING MACHINE COMPONENT
Document Type and Number:
WIPO Patent Application WO/2015/125767
Kind Code:
A1
Abstract:
Provided is a method for producing machine components that involves a nitriding treatment without the use of ammonia gas, and that achieves greater energy conservation. This method for producing a machine component comprises: a step for preparing a steel member (90); a step for forming a vanadium-containing film on the surface of the steel member (90) by oxidizing the steel member (90) by using a blackening liquid (4); and a step for forming a nitrogen-rich layer on said surface of said steel member (90) by heating said steel member (90), on which said vanadium-containing film has been formed, in a heat-treatment gas atmosphere that includes nitrogen gas and does not include ammonia gas.
Inventors:
YAGITA KAZUHIRO (JP)
FUJITA TAKUMI (JP)
IDE KOJI (JP)
FUJITA TAKUMI (JP)
IDE KOJI (JP)
Application Number:
PCT/JP2015/054240
Publication Date:
August 27, 2015
Filing Date:
February 17, 2015
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
YAGITA KAZUHIRO (JP)
FUJITA TAKUMI (JP)
IDE KOJI (JP)
YAGITA KAZUHIRO (JP)
FUJITA TAKUMI (JP)
IDE KOJI (JP)
International Classes:
C23C28/04; C21D1/06; C21D9/40; C23C8/26; C23C22/62; C22C38/00; C22C38/12; C22C38/24
Foreign References:
| JP2012237062A | 2012-12-06 | |||
| JPS62141497A | 1987-06-24 | |||
| JP2010121177A | 2010-06-03 | |||
| JPH10195678A | 1998-07-28 |
Attorney, Agent or Firm:
Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)
Patent business corporation Fukami patent firm (JP)
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