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1. (WO2014192117) SOFT-NITRIDED INDUCTION-QUENCHED STEEL COMPONENT

Pub. No.:    WO/2014/192117    International Application No.:    PCT/JP2013/065063
Publication Date: Fri Dec 05 00:59:59 CET 2014 International Filing Date: Fri May 31 01:59:59 CEST 2013
IPC: C22C 38/00
C21D 1/06
C21D 1/10
C21D 9/32
C22C 38/38
C22C 38/60
C23C 8/32
C23C 8/80
Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION
新日鐵住金株式会社
Inventors: KOYAMA, Tatsuya
小山 達也
YOSHIDA, Suguru
吉田 卓
Title: SOFT-NITRIDED INDUCTION-QUENCHED STEEL COMPONENT
Abstract:
 A soft-nitrided induction-quenched steel component having excellent surface fatigue strength, characterized in having a predetermined chemical composition, a solid solution N concentration of 0.05 to 1.5% to a depth of 0.2 mm from the surface, a Vickers hardness of Hv 600 or higher to a depth of 0.2 mm from the surface following tempering at 300°C, an effective hardening layer depth (t) of 0.5 mm or more, and a ratio t/r ≦ 0.35, where r (mm) is the radius or half the thickness of a location liable to be damaged.