Rolling bearing
AssigneesNtn Corporation, Kawasaki Steel Corporation
InventorsAkio Okayama, Hiroshi Murakami, Kikuo Maeda, Takuya Atsumi, Toshiyuki Hoshino, Keniti Amano
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Abstract
In a rolling bearing having a rolling bearing ring and a rolling element of at least 20 mm in diameter, at least one of the rolling bearing ring and the rolling element consists of carburized or carbonitrided steel containing at least 0.2 wt % and not more than 0.35 wt % of carbon and at least 2.2 wt % and not more than 3.6 wt % of Ni. Thus obtained is a rolling bearing capable of reducing the material cost and increasing the fatigue life or reducing the carburizing time by ensuring surface hardness and optimizing the case depth.
Claims7
A rolling bearing having a rolling bearing ring and a rolling element, wherein the diameter of said rolling element is at least 20 mm and at least one of said rolling bearing ring and said rolling element consists of carburized or carbonitrided steel consisting essentially of Fe, Cr, Mo, Si, Mn, Ti, S, at least 0.2 wt % and not more than 0.35 wt % of C and, at least 2.2 wt % and not more than 3.6 wt % of Ni.
A rolling bearing having a rolling bearing ring and a rolling element, wherein the diameter of said rolling element is at least 20 mm and at least one of said rolling bearing ring and said rolling element consists of carburized or carbonitrided steel consisting essentially of Fe, at least one selected from the group consisting of Cr, Mo, Si, Mn, Ti and S, at least 0.2 wt % and not more than 0.35 wt % of C, and at least 2.2 wt % and not more than 3.6 wt % of Ni.
Dependencies are inferred from the claim text.