Title:
BEARING STEEL AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2013/058131
Kind Code:
A1
Abstract:
The present invention is bearing steel, wherein the metal composition comprises, as inclusions, compound oxysulfides containing rare earth metals, Ca, O, S, and Al; TiN; MnS; Al2O3; and compound oxides containing Al and Ca; the number of compound oxysulfide inclusions per the total number of inclusions is 50% or greater, but less than 100%; the number of compound oxysulfide inclusions having a major axis of 5 µm or larger is between 0.001 and 2 per 1 mm2 of observed surface; and the number of TiN inclusions having a major axis of 5 µm or greater present independent of the compound oxysulfide inclusions is 0.001 or greater, but less than 1.0 per 1 mm2 of observed surface.
Inventors:
HASHIMURA MASAYUKI (JP)
MIYAZAKI MASAFUMI (JP)
YAMAMURA HIDEAKI (JP)
SUZUKI TAKAHISA (JP)
FUJITA TAKASHI (JP)
MIYAZAKI MASAFUMI (JP)
YAMAMURA HIDEAKI (JP)
SUZUKI TAKAHISA (JP)
FUJITA TAKASHI (JP)
Application Number:
PCT/JP2012/076042
Publication Date:
April 25, 2013
Filing Date:
October 05, 2012
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; B22D27/02; C21C7/00; C21C7/04; C21C7/06; C21D9/00; C22C38/28; C22C38/54; F16C33/30; C21D9/40
Foreign References:
| JP2007254818A | 2007-10-04 | |||
| JP2004277777A | 2004-10-07 | |||
| JP2000273525A | 2000-10-03 | |||
| JPH08120401A | 1996-05-14 | |||
| JPH09263820A | 1997-10-07 | |||
| JPH11279695A | 1999-10-12 | |||
| JP2004277777A | 2004-10-07 |
Other References:
See also references of EP 2770077A4
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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Claims: