Bearing steel part for rolling bearing

Details Bearing steel part for rolling bearing Bearing steel part for rolling bearing

1997-09-23

1999-09-21

Sheehan, John

Metal treatment

Stock

Carburized or nitrided

148906, 384912, C23C 822

Patent

active

059548940

ABSTRACT:
A bearing steel part for a rolling bearing having a core portion and a high hardness region formed by carburization to cover the core portion is provided in which the composition of at least the core portion contains at least 0.15 wt. % and at most 0.20 wt. % of C, at least 4 wt. % and at most 7 wt. % of Cr, at least 1 wt. % and at most 3 wt. % of Mo, and at least 0.4 wt. % and at most O.9 wt. % of V, with Fe group as base material. Therefore, the bearing steel part for the rolling bearing can be obtained having a better rolling contact fatigue life realized by increasing the core hardness of carburized steel and also having a high fracture toughness value.

REFERENCES:
patent: 4358317 (1982-11-01), Abe
patent: 5560787 (1996-10-01), Takagi et al.

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