Title:
STEEL COMPONENT AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2015/137388
Kind Code:
A1
Abstract:
In the present invention, heating and cooling processing in which the surface of a steel material machined to a desired shape and subjected to carbonitriding processing is heated by stimulation and then is cooled is repeated a desired number of times so that an ultrafine crystal layer is formed directly below the surface of the steel material and at least a prescribed number of cracks are formed below the formed ultrafine crystal layer. As a result of this configuration, viscosity can be produced by raising the toughness of the surface or directly below the surface and the growth of cracks can be suppressed.
Inventors:
MATSUMOTO KENJI (JP)
Application Number:
PCT/JP2015/057131
Publication Date:
September 17, 2015
Filing Date:
March 11, 2015
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
International Classes:
C21D7/04; C21D1/06; C21D7/06; C21D9/32; C23C8/32
Domestic Patent References:
WO2007102280A1 | 2007-09-13 |
Foreign References:
JP2009014167A | 2009-01-22 | |||
JPH11347944A | 1999-12-21 | |||
JP2004339575A | 2004-12-02 | |||
JP2007297651A | 2007-11-15 |
Attorney, Agent or Firm:
YOSHIDA YUTAKA (JP)
Yoshida 豊 (JP)
Yoshida 豊 (JP)
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