US 12,392,373 B2
Rolling bearing
Masahide Natori, Tokyo (JP); and Hiroki Komata, Tokyo (JP)
Assigned to NSK Ltd., Tokyo (JP)
Appl. No. 18/683,986
Filed by NSK LTD., Tokyo (JP)
PCT Filed May 27, 2022, PCT No. PCT/JP2022/021811
§ 371(c)(1), (2) Date Feb. 15, 2024,
PCT Pub. No. WO2023/026621, PCT Pub. Date Mar. 2, 2023.
Claims priority of application No. 2021-136612 (JP), filed on Aug. 24, 2021.
Prior Publication US 2024/0352973 A1, Oct. 24, 2024
Int. Cl. F16C 33/62 (2006.01); C21D 1/32 (2006.01); C21D 9/40 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); F16C 33/64 (2006.01)
CPC F16C 33/62 (2013.01) [C21D 1/32 (2013.01); C21D 9/40 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); F16C 33/64 (2013.01); C21D 2211/008 (2013.01); F16C 2202/04 (2013.01); F16C 2204/64 (2013.01); F16C 2204/70 (2013.01); F16C 2223/10 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A rolling bearing comprising:
a structure of a front surface including at least a rolling contact surface,
the structure containing a structure having a solid solution carbon amount in a martensitic structure after heat treatment of 0.35 mass % or more and 0.65 mass % or less and a volume ratio of spheroidized carbides having a diameter of 200 nm or more of 4.5% or less.