Bearing steel excellent in rolling-contact fatigue properties and method for producing same

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United States of America Patent

PATENT NO 9624559
APP PUB NO 20150047750A1
SERIAL NO

14384065

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Abstract

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A bearing component having increased rolling-contact fatigue life, the bearing component being made of a bearing steel that satisfies a predetermined chemical composition, and Si (boundary Si), Mn (boundary Mn), Cr (boundary Cr), Cu (boundary Cu), Ni (boundary Ni), and Mo (boundary Mo) included in a matrix phase region (boundary surface region) from the surface of spheroidized cementite to 20 nm away satisfy the formula:

description='In-line Formulae' end='lead'9.0≦1.4×boundary Si+1.8×boundary Mn+5.5×boundary Cu+4.2×boundary Ni+4.8×boundary Cr+5.5×boundary Mo.description='In-line Formulae' end='tail'

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Patent Owner(s)

  • KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.);KOBE STEEL, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujita, Manabu Kobe, JP 63 1726
Kaizuka, Masaki Kobe, JP 9 12
Shindo, Yosuke Kobe, JP 13 57

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