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AssigneesNsk Ltd., Sanyo Special Steel Co., Ltd.
InventorsHiromichi Takemura, Nobuaki Mitamura, Yasuo Murakami, Tomonobu Yoshikawa, Shuhei Kitano, Kazuhiko Hiraoka
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An induction-hardened rolling bearing device used by disposing rolling elements in a raceway track member, with excellent cold drawability and improved wear resistance and extended service life, in which ingredients of an alloy for the raceway track member contain, from 0.40 to 0.90% of C, from 0.05 to 0.80% of Si, from 0.10 to 2.0% of Mn, from 0.05 to 0.50% of Ti and 0.03% or less of N, on the weight basis, induction hardening is applied at least to the raceway surface of the raceway track member, and Ti carbide and Ti carbonitride each having an average particle diameter of from 5 to 100 nm are dispersed on the surface and in the steels of the raceway track member to make the hardness of the raceway surface to HRC 59 or more.
An induction-hardened rolling bearing device having rolling elements disposed to and rolling in raceway track members, in which ingredients of an alloy for at least one of the raceway track members contains from 0.40 to 0.90% of C, from 0.05 to 0.80% of Si, from 0.10 to 2.0% of Mn, from 0.05 to 0.50% of Ti and 0.03% or less of N, on the weight basis, induction hardening is applied at least to the raceway surface of the raceway track member, and Ti carbide or Ti carbonitride each having an average particle diameter of from 5 to 100 nm are dispersed on the surface and in the raceway track member to make the hardness of the raceway surface to HRC 59 or more.
Dependencies are inferred from the claim text.