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    HEAT RESISTANT STEEL FOR EXHAUST VALVE
    2.
    发明申请
    HEAT RESISTANT STEEL FOR EXHAUST VALVE 审中-公开
    排气阀耐热钢

    公开(公告)号：US20110236247A1

    公开(公告)日：2011-09-29

    申请号：US13070629

    申请日：2011-03-24

    申请人： Mototsugu Osaki ,  Shigeki Ueta ,  Takashi Tsuyumu

    发明人： Mototsugu Osaki ,  Shigeki Ueta ,  Takashi Tsuyumu

    IPC分类号： C22C38/58 ,  C22C38/48 ,  C22C38/44 ,  C22C38/52 ,  C22C38/54

    CPC分类号： C22C38/02 ,  C21D9/0068 ,  C22C38/001 ,  C22C38/44 ,  C22C38/48 ,  C22C38/58 ,  F01L3/02 ,  F01L2103/00 ,  F01L2820/00

    摘要： The present invention provides a heat resistant steel for an exhaust valve, containing: more than 0.50% by mass but less than 0.80% by mass of C, more than 0.30% by mass but less than 0.60% by mass of N, 17.0% by mass or more but less than 25.0% by mass of Cr, 4.0% by mass or more but less than 12.0% by mass of Ni, 7.0% by mass or more but less than 14.0% by mass of Mn, 2.0% by mass or more but less than 6.0% by mass of Mo, more than 0.5% by mass but less than 1.5% by mass of Si, and 0.025% by mass or more but less than 1.0% by mass of Nb, with the balance consisting of Fe and unavoidable impurities, in which a content of P contained in the unavoidable impurities is regulated to less than 0.03% by mass, a total content of C and N is from 0.85% by mass to 1.3% by mass, and a ratio of the content of Nb to the content of C is 0.05 or more but less than 1.8.

    摘要翻译： 本发明提供一种用于排气阀的耐热钢，其含有：大于0.50质量％且小于0.80质量％的C，大于0.30质量％且小于0.60质量％的N，17.0重量％ 以上且小于25.0质量％的Cr，4.0质量％以上且小于12.0质量％的Ni，7.0质量％以上且小于14.0质量％的Mn，2.0质量％以下，或 更多但小于6.0质量％的Mo，大于0.5质量％但小于1.5质量％的Si，以及0.025质量％以上且小于1.0质量％的Nb，余量由Fe 和不可避免的杂质，其中将不可避免的杂质中含有的P的含量调节至小于0.03质量％，C和N的总含量为0.85质量％至1.3质量％，并且含量 的Nb含量为0.05以上且小于1.8。

    Hot-forgeable Ni-based superalloy excellent in high temperature strength
    3.
    发明授权
    Hot-forgeable Ni-based superalloy excellent in high temperature strength 有权

    公开(公告)号：US09738953B2

    公开(公告)日：2017-08-22

    申请号：US14167370

    申请日：2014-01-29

    申请人： Mototsugu Osaki ,  Shigeki Ueta ,  Takuma Okajima ,  Ayumi Hori

    发明人： Mototsugu Osaki ,  Shigeki Ueta ,  Takuma Okajima ,  Ayumi Hori

    IPC分类号： C22C19/05

    CPC分类号： C22C19/056 ,  C22C19/055

    摘要： The present invention provides a hot-forgeable Ni-based superalloy excellent in high temperature strength, including, in terms of % by mass: C: more than 0.001% and less than 0.100%, Cr: 11.0% or more and less than 19.0%, Co: 0.5% or more and less than 22.0%, Fe: 0.5% or more and less than 10.0%, Si: less than 0.1%, Mo: more than 2.0% and less than 5.0%, W: more than 1.0% and less than 5.0%, Mo+½W: 2.5% or more and less than 5.5%, S: 0.010% or less, Nb: 0.3% or more and less than 2.0%, Al: more than 3.00% and less than 6.50%, and Ti: 0.20% or more and less than 2.49%, with the balance being Ni and unavoidable impurities, in which (Ti/Al)×10 is 0.2 or more and less than 4.0 in terms of atomic ratio, and in which Al+Ti+Nb is 8.5% or more and less than 13.0% in terms of atomic %.