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1. (WO2017170540) CARBONITRIDED COMPONENT HAVING EXCELLENT SURFACE FATIGUE STRENGTH AND BENDING FATIGUE STRENGTH, AND METHOD FOR MANUFACTURING SAME

Pub. No.:    WO/2017/170540    International Application No.:    PCT/JP2017/012621
Publication Date: Fri Oct 06 01:59:59 CEST 2017 International Filing Date: Wed Mar 29 01:59:59 CEST 2017
IPC: C22C 38/00
B24C 1/10
C21D 1/06
C21D 7/06
C21D 9/32
C22C 38/22
C22C 38/54
Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
株式会社神戸製鋼所
Inventors: MATSUGASAKO, Akihiro
松ヶ迫 亮廣
SHUDO, Takehiro
酒道 武浩
Title: CARBONITRIDED COMPONENT HAVING EXCELLENT SURFACE FATIGUE STRENGTH AND BENDING FATIGUE STRENGTH, AND METHOD FOR MANUFACTURING SAME
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.