Bearing steel and ingot material for bearing having excellent rolling contact fatigue life characteristics and method for manufacturing the same

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United States of America Patent

PATENT NO 9139887
APP PUB NO 20130174945A1
SERIAL NO

13819920

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Abstract

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The present invention provides bearing steel, comprising a chemical composition including by mass %, C: 0.56%≦[% C]≦0.70%, Si: 0.15%≦[% Si]<0.50%, Mn: 0.60%≦[% Mn]≦1.50%, Cr: 0.50%≦[% Cr]≦1.10%, Mo: 0.05%≦[% Mo]≦0.5%, P: [% P]≦0.025%, S: [% S]≦0.025%, Al: 0.005%≦[% Al]≦0.500%, O: [% O]≦0.0015%, N: 0.0030%≦[% N]≦0.015%, and remainder as Fe and incidental impurities.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATION2-3 UCHISAIWAI-CHO 2-CHOME CHIYODA-KU TOKYO 100-0011
NTN CORPORATION3-6-32 NAKANOSHIMA KITA-KU OSAKA-SHI OSAKA 530-0005

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hase, Kazukuni Tokyo, JP 41 93
Honjo, Minoru Tokyo, JP 25 45
Kimura, Tatsumi Tokyo, JP 27 73
Mitao, Shinji Tokyo, JP 14 60

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