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专利名称：BEARING COMPONENT AND ROLLING
BEARING
发明人：Chikara OHKI,Yukio MATSUBARA,Daisuke
SATO
申请号：US145901申请日：20140528
公开号：US20160123396A1公开日：20160505
专利附图：
摘要：A bearing component composed of steel which contains carbon not less than0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less
than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass %and less than 1.6 mass % and is composed of remainder iron and an impurity and having acarbonitrided layer formed at a surface portion is provided. An average concentration ofnitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass% and variation in nitrogen concentration is not higher than 0.1 mass %. An amount ofretained austenite is not greater than 8 volume %. An area ratio of a precipitate in theinside where no carbonitrided layer is formed is not lower than 11%.
申请人：NTN CORPORATION
地址：Osaka JP
国籍：JP
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