Patent Number: 6,332,714

Title: Induction-hardened rolling bearing device

Abstract: 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.

Inventors: Takemura; Hiromichi (Fujisawa, JP), Mitamura; Nobuaki (Fujisawa, JP), Murakami; Yasuo (Fujisawa, JP), Yoshikawa; Tomonobu (Fujisawa, JP), Kitano; Shuhei (Himeji, JP), Hiraoka; Kazuhiko (Himeji, JP)

Assignee: NSK Ltd.

International Classification: C21D 9/40 (20060101); F16C 29/00 (20060101); F16C 33/62 (20060101); C21D 1/10 (20060101); C21D 1/09 (20060101); F16C 033/32 ()

Expiration Date: 12/25/2018