Title:
CARBONITRIDED COMPONENT HAVING EXCELLENT SURFACE FATIGUE STRENGTH AND BENDING FATIGUE STRENGTH, AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2017/170540
Kind Code:
A1
Abstract:
The carbonitrided component pertaining to an embodiment of the present invention has a carbonitrided layer on the surface of a steel material, wherein the steel material contains a predetermined ingredient, and the carbonitrided layer has a hardness of 850 HV or greater at a position a depth of 25 µm from the surface thereof, the absolute value of the compressive residual stress thereof at a position a depth of 200 µm from the surface thereof is 200 MPa or greater, the absolute value of the maximum compressive residual stress to a position a depth of 200 µm from the surface thereof is 850 MPa or greater, and the ten-point average roughness Rz specified by JIS B0601 (1994) thereof satisfies a value of 2.5 µm or less.
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Inventors:
MATSUGASAKO AKIHIRO
SHUDO TAKEHIRO
SHUDO TAKEHIRO
Application Number:
PCT/JP2017/012621
Publication Date:
October 05, 2017
Filing Date:
March 28, 2017
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; B24C1/10; C21D1/06; C21D7/06; C21D9/32; C22C38/22; C22C38/54
Foreign References:
| JP2009249700A | 2009-10-29 | |||
| JP2012017499A | 2012-01-26 | |||
| JP2007262470A | 2007-10-11 | |||
| JP2002327237A | 2002-11-15 | |||
| JP2002121644A | 2002-04-26 |
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
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