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公开(公告)号:US20080233421A1
公开(公告)日:2008-09-25
申请号:US12076718
申请日:2008-03-21
申请人: Hitoshi TANINO , Kimihiko ANDO , Shinya OMURA , Toshitake MIYAKE , Mikio KONDOH , Nobuhiko MATSUMOTO
发明人: Hitoshi TANINO , Kimihiko ANDO , Shinya OMURA , Toshitake MIYAKE , Mikio KONDOH , Nobuhiko MATSUMOTO
CPC分类号: C22C38/04 , B22F5/12 , B22F2998/00 , B22F2998/10 , C22C33/0264 , C22C38/12 , C22C38/16 , Y10T428/12014 , B22F1/025 , B22F3/17 , B22F3/10
摘要: There is provided an iron-based sintered material resistant to the metal fatigue developing from the voids therein functioning as the initial points and improved in the strength and machinability thereof.An iron-based sintered material, including a mixed structure of martensite, bainite, and pearlite and multiple voids formed in the mixed structure, wherein the ratio of martensite and bainite in the mixed structure is 70% or more; the ratio of martensite and/or bainite in the mixed structure forming the void surface is 90% or more; and the density of the iron-based sintered material is 7.4 g/cm3 or more.
摘要翻译: 提供一种铁基烧结材料,其耐金属疲劳从其中作为起始点的空隙显影,并提高了其强度和机械加工性。 在混合结构体中形成马氏体,贝氏体和珠光体的混合结构和多个空隙的铁基烧结体,其中,所述混合结构体中的马氏体和贝氏体的比例为70%以上, 形成空隙面的混合结构体中的马氏体和/或贝氏体的比例为90%以上。 铁基烧结体的密度为7.4g / cm 3以上。