ROLLING CONTACT PART, ROLLING BEARING, UNIVERSAL JOINT, AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2013/122100

A1

An outer ring (11), an inner ring (12), and balls (13) are formed with a steel containing, by mass, 0.15-0.25% carbon, 0.45-0.55% silicon, 1.05-1.15% manganese, and 1.40-1.50% chromium, with the balance being iron and impurities, and the surfaces thereof respectively have an outer ring rolling surface (11A), an inner ring rolling surface (12A), and a ball contact surface (13A), which make rolling contact with other members. An outer ring carburized layer (11B), an inner ring carburized layer (12B), and a ball carburized layer (13B) are formed respectively so as to include the outer ring rolling surface (11A), the inner ring rolling surface (12A), and the ball contact surface (13A).

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MAEDA KIKUO (JP)
KAWAKITA MASAYUKI (JP)
KUBOTA MANABU (JP)
KOZAWA SHUJI (JP)

PCT/JP2013/053386

August 22, 2013

February 13, 2013

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NTN TOYO BEARING CO LTD (JP)
NIPPON STEEL & SUMITOMO METAL CORP (JP)

C22C38/00; C21D1/06; C21D9/40; C22C38/18; C23C8/22; C23C8/32; F16C19/06; F16C33/32; F16C33/34; F16C33/62; F16C33/64; F16D3/20

JP2012072462A	2012-04-12
JP2004027266A	2004-01-29
JP2011063886A	2011-03-31

Fukami Patent Office, p. c. (JP)
Patent business corporation Fukami patent firm (JP)

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