Title:
Roller bearing
Document Type and Number:
Japanese Patent JP6015251
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a rolling bearing suppressing a processing cost of a plurality of balls 6,6, and hard to generate white tissue peeling on a rolling motion surface of each of the balls 6,6 even under a severe use condition.SOLUTION: An outer ring 3, an inner ring 5, each of the balls 6,6 are made from an alloy steel containing C:0.8 to 1.2 mass%, Si:0.1 to 0.7 mass%, Mn:0.2 to 1.2 mass%, and Cr:0.9 to 1.8 mass%. A surface hardened layer having a hardness of HRC 63 to 67 and being harder with HRC 1 or more than hardness of surface hardened layer of the outer ring 3 and the inner ring 5 is formed on each of the balls 6,6 by a carbonitriding treatment. Further a content of N is 0.05 mass% or more, the amount of retained austenite is 20 to 40 vol.% and a compressive residual stress is 500 to 900 MPa in terms of a depth position of 1% of diameter of each of the balls 6,6 from a surface of each of the balls 6,6.
Inventors:
Hideyuki Uyama
Yusuke Morito
Hiroki Yamada
Masako Tsutsumi
Yusuke Morito
Hiroki Yamada
Masako Tsutsumi
Application Number:
JP2012192301A
Publication Date:
October 26, 2016
Filing Date:
August 31, 2012
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
C22C38/00; C10M105/18; C10M107/34; C10M115/08; C10M125/02; C10M129/10; C10M129/34; C10M129/58; C10M133/12; C10M135/18; C10M137/10; C10M169/00; C22C38/44; F16C19/00; F16C19/06; F16C19/36; F16C33/32; F16C33/34; F16C33/62; F16C33/66
Domestic Patent References:
| JP2006348342A | ||||
| JP2012031456A | ||||
| JP2002004003A | ||||
| JP2008151236A | ||||
| JP2005121080A | ||||
| JP2008024783A | ||||
| JP2004011712A | ||||
| JP2008267402A |
Attorney, Agent or Firm:
Kiwa Patent Office