To provide a carburized component or a carbonitrided component made of steel and subjected to shot peening which has satisfactory facial fatigue strength and can response to requests for lightening, miniaturization and high stress loading.
Regarding the carburized component or a carbonitrided component made of steel and subjected to shot peening, the base is made of steel having chemical components comprising, by mass, 0.1 to 0.3% C, 0.05 to 1.5% Si, 0.2 to 1.5% Mn, 0.003 to 0.05% S, 0.5 to 3.0% Cr, 0.01 to 0.05% Al and 0.008 to 0.025% N, and the balance Fe with impurities, and in which the hardness of the surface layer part is 850 by Vickers hardness, the depth of the hardened layer defined by a distance from the surface to a position having a Vickers hardness of 700 is 0.6 to 1.0 mm, and the volume fraction of lens-shaped martensite occupied in the region to a depth of 0.1 mm from the surface is 3%.
HORIMOTO MASAYUKI
| JP2005325398A | 2005-11-24 | |||
| JPH01108347A | 1989-04-25 | |||
| JP2006225741A | 2006-08-31 |
Terutada Hogami
Chihara
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