STEEL COMPONENT

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United States of America Patent

APP PUB NO 20230212731A1
SERIAL NO

17998494

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a steel component with excellent surface fatigue strength. The steel component has a nitride compound layer with a thickness of 5.0 μm to 30.0 μm and a hardened layer in an order from a component surface to a component inside, where a thickness of a porous layer on an outermost surface of the nitride compound layer is 3.0 μm or less and 40.0% or less of a thickness of the nitride compound layer, and the hardened layer has a hardness of HV600 or more at a position of 50 μm inward from the component surface, a hardness of HV400 or more at a position from the component surface to the component inside of 400 μm, and a hardness of HV250 or more at a position from the component surface to the component inside of 600 μm.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATIONTOKYO 100-0011

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
IHARA, Naoya Chiyoda-ku, Tokyo, JP 4 2
IWAMOTO, Takashi Chiyoda-ku, Tokyo, JP 181 2921
NISHIMURA, Kimihiro Chiyoda-ku, Tokyo, JP 25 178

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