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    METHOD FOR TREATING MOLTEN CAST IRON
    98.
    发明申请
    METHOD FOR TREATING MOLTEN CAST IRON 审中-公开

    公开(公告)号：US20180148805A1

    公开(公告)日：2018-05-31

    申请号：US15575044

    申请日：2016-05-17

    申请人： Toshiba Kikai Kabushiki Kaisha

    发明人： Ryousuke FUJIMOTO ,  Shuhei HONMA

    IPC分类号： C21C1/10 ,  B22D27/20 ,  C22C37/04

    CPC分类号： C21C1/10 ,  B22D27/20 ,  C22C37/00 ,  C22C37/04

    摘要： A method for treating molten cast iron includes, performing an inoculation treatment to the molten cast iron, with the use of an inoculant containing: 15 to 80 wt % Si; either 80 to 100 wt % purity La or 80 to 100 wt % purity Ce as RE; Ca; Al; and the balance Fe with inevitable impurities, by adding the inoculant to the molten cast iron such that: the addition amount of La or Ce relative to the molten cast iron is 0.001 to 0.009 wt %; the addition amount of Ca relative to the molten cast iron is 0.001 to 0.02 wt %; and the addition amount of Al relative to the molten cast iron is 0.001 to 0.02 wt %.

    SPHEROIDIZING TREATMENT METHOD FOR MOLTEN METAL OF SPHEROIDAL GRAPHITE CAST IRON
    99.
    发明申请
    SPHEROIDIZING TREATMENT METHOD FOR MOLTEN METAL OF SPHEROIDAL GRAPHITE CAST IRON 审中-公开
    SPHEROIDAL石墨铸铁的金属冶金处理方法

    公开(公告)号：US20160138139A1

    公开(公告)日：2016-05-19

    申请号：US14897084

    申请日：2014-09-05

    申请人： TOSHIBA KIKAI KABUSHIKI KAISHA

    发明人： Ryosuke FUJIMOTO ,  Shuhei HOMMA ,  Takashi YOKOYAMA ,  Yuji NIHEI ,  Toshiaki OZEKI

    IPC分类号： C22C33/08 ,  B22D1/00 ,  C22C28/00 ,  C21C7/00 ,  C22C37/04 ,  C22C37/10 ,  B22D27/20 ,  C21C1/10

    CPC分类号： C22C33/08 ,  B22D1/00 ,  B22D27/20 ,  C21C1/10 ,  C21C1/105 ,  C21C7/0006 ,  C22C28/00 ,  C22C33/10 ,  C22C37/04 ,  C22C37/10 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/06

    摘要： A graphite spheroidizing agent containing: 30-80 wt % of Si; Mg; RE (rare earth element) which comprises Ce with a purity level of 80-100 wt % or La with a purity level of 80-100 wt %; Ca; and Al is used. The graphite spheroidizing agent is added so as to satisfy the conditions that an amount of RE equivalent to 0.001-0.009 wt % of the total weight of the molten metal, an amount of Ca equivalent to 0.001-0.02 wt % of the total weight of the molten metal, and an amount of Al equivalent to 0.001-0.02 wt % of the total weight of the molten metal are added to the molten metal, and that the molten metal contains 0.03-0.07 wt % of Mg after the graphite spheroidizing treatment. It is possible to suppress crystallization of chunky graphite in a thick section of spheroidal graphite cast iron and deterioration of mechanical properties, with a low cost.

    摘要翻译： 一种石墨球化剂，含有：30-80重量％的Si; 镁 RE（稀土元素），其包含纯度为80-100重量％的Ce或纯度为80-100重量％的La; 钙; 并使用Al。 添加石墨球化剂以满足以下条件：相当于熔融金属总重量的0.001-0.009重量％的RE量，相当于其总重量的0.001-0.02重量％的Ca量 熔融金属，并且将相当于熔融金属总重量的0.001-0.02重量％的Al的量加入到熔融金属中，熔融金属在石墨球化处理后含有0.03-0.07重量％的Mg。 可以以低成本抑制球状石墨铸铁的厚截面中的大块石墨的结晶化和机械性能的劣化。