Bearing component and method for manufacturing the same

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United States of America Patent

PATENT NO 11781596
APP PUB NO 20190338808A1
SERIAL NO

16474525

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Abstract

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In one aspect of the present invention, a method for manufacturing a bearing component includes: a preparation step of preparing a ring-shaped member of steel having a radially inner surface, a radially outer surface, and a thickness which is a distance between the radially inner surface and the radially outer surface; and a heat treatment step of performing a heat treatment to locally heat one of the radially inner surface and the radially outer surface to a heat treatment temperature and subsequently cool the one of the radially inner surface and the radially outer surface, the method satisfying S≥930/(0.3477 W2−1.594 W−0.804), where S represents an average temperature increasing rate (unit: ° C./sec) applied when the surface is heated and W represents the thickness (unit: mm).

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Patent Owner(s)

Patent OwnerAddress
NTN CORPORATIONOSAKA-SHI OSAKA 550-0003

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ohki, Chikara Kuwana, JP 61 258
Sato, Miyu Kuwana, JP 10 5
Yuki, Hiroshi Kuwana, JP 56 252

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