Machine component

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United States of America Patent

PATENT NO 11332817
APP PUB NO 20210032737A1
SERIAL NO

17046064

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Abstract

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A machine component includes a core made up of a steel for machine structural use, and a medium carbon-containing layer and a high carbon-containing layer formed of the steel for machine structural use, the medium carbon-containing layer covering the core, the high carbon-containing layer covering the medium carbon-containing layer and having a carbon concentration of 0.8-1.5%. The high carbon-containing layer is made up of a martensitic structure having carbides dispersed therein and a residual austenitic structure, wherein spheroidized carbides with an aspect ratio of 1.5 or less constitute 90% or more of a total number of the carbides, and the number of spheroidized carbides on prior austenite grain boundaries is 40% or less of the total number of the carbides.

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Patent Owner(s)

Patent OwnerAddress
KOMATSU LTDMINATO-KU TOKYO 107-8414

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hashimoto, Kazuya Himeji, JP 83 374
Hiratsuka, Yusuke Himeji, JP 4 3
Sato, Kensuke Tokyo, JP 37 352
Yamamoto, Koji Tokyo, JP 384 3625

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