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    System for removing non-metallic foreign matter in molten metal
    1.
    发明授权
    System for removing non-metallic foreign matter in molten metal 失效
    用于去除熔融金属中非金属异物的系统

    公开(公告)号：US5429655A

    公开(公告)日：1995-07-04

    申请号：US952891

    申请日：1992-11-20

    申请人： Shigeru Ogura ,  Masayuki Onishi ,  Hidenari Kitaoka ,  Mitsuru Sakurai ,  Toshikazu Sakuraya ,  Yozo Tanino ,  Tsukasa Terashima ,  Yoshiro Tomiyama ,  Yuki Nabeshima ,  Yuji Miki ,  Saburo Moriwaki ,  Noboru Yasukawa

    发明人： Shigeru Ogura ,  Masayuki Onishi ,  Hidenari Kitaoka ,  Mitsuru Sakurai ,  Toshikazu Sakuraya ,  Yozo Tanino ,  Tsukasa Terashima ,  Yoshiro Tomiyama ,  Yuki Nabeshima ,  Yuji Miki ,  Saburo Moriwaki ,  Noboru Yasukawa

    IPC分类号： B22D11/10 ,  B22D11/11 ,  B22D11/114 ,  B22D41/005

    CPC分类号： B22D11/114 ,  B22D11/11

    摘要： An apparatus for removing non-metallic foreign matter in a molten steel includes a tundish and a coil device. The tundish is an intermediate container receiving the molten steel from a ladle and feeding a purified molten steel by removing the non-metallic foreign matter in the molten steel. For removing the non-metallic foreign matter, the tundish has a swirl flow bath and a floatation bath. In the circumference of the swirl flow bath of the tundish, a coil device is arranged for flowing the molten steel in the swirl flow bath in swirl fashion. The tundish and the coil device are formed separately and constructed for relative movement to each other. The molten steel in the swirl flow bath of the tundish is flown in swirl fashion in the horizontal direction by a magnetic field generated by the coil device. At this time, the molten steel forms a parabolic concaved surface. The non-metallic foreign matter in the molten steel is forcedly floated up on the parabolic surface portion of the molten steel, which is removed by an appropriate means. The molten steel thus purified flows into the floatation bath from the swirl flow bath. With the static flow in the floatation bath, the residual non-metallic foreign matter floats up. The purified molten steel is poured into the mold through the bottom of the floatation bath.

    摘要翻译： PCT No.PCT / JP92 / 00388 Sec。 371日期：1992年11月20日 102（e）日期1992年11月20日PCT提交1992年3月27日PCT公布。 出版物WO92 / 17295 日期：1992年10月15日。用于除去钢水中的非金属异物的设备包括中间包和线圈装置。 中间包是从钢包中接收钢水的中间包，并且通过去除钢水中的非金属异物来送入精炼的钢水。 为了去除非金属异物，中间包具有旋流池和漂浮浴。 在中间包的涡流槽的圆周上，设置有一个线圈装置，用于以漩涡的方式使旋转流槽中的钢水流动。 中间包和线圈装置分别形成并相互相对移动构造。 在中间包的涡流槽中的钢水由螺旋装置产生的磁场沿水平方向旋转地流动。 此时，钢水形成抛物面凹面。 钢水中的非金属杂质被强制地悬浮在钢水的抛物面上，通过适当的方式去除。 这样净化的钢水从涡流浴流入浮选槽。 随着浮选槽中的静态流动，剩余的非金属异物浮起。 将纯化的钢水通过浮选槽的底部倒入模具中。

    Process for producing high-nitrogen ultralow-carbon steel
    3.
    发明授权
    Process for producing high-nitrogen ultralow-carbon steel 失效
    高氮超低碳钢生产工艺

    公开(公告)号：US06764528B2

    公开(公告)日：2004-07-20

    申请号：US10203268

    申请日：2002-08-08

    申请人： Seiji Nabeshima ,  Shuji Takeuchi ,  Hisashi Ogawa ,  Yuki Nabeshima ,  Yasuyuki Masumoto

    发明人： Seiji Nabeshima ,  Shuji Takeuchi ,  Hisashi Ogawa ,  Yuki Nabeshima ,  Yasuyuki Masumoto

    IPC分类号： C21C710

    CPC分类号： C21C7/068 ,  C21C7/04 ,  C21C7/10 ,  C22C38/001 ,  C22C38/004 ,  C22C38/04

    摘要： A method of producing a high nitrogen, ultra low carbon steel suitable to rolling material for use in cold rolled steel sheets having excellent age hardening property by an age hardening treatment after forming by working, with no defects in slabs or steel sheets, reliably, at a reduced cost and with a high productivity is proposed. The method for producing a rolling material for use in ultra low carbon steel sheets at: C≦0.0050 mass % comprises; applying primary decarburization refining to molten iron from a blast furnace, then controlling the composition in the molten steel after primary decarburization refining to a range satisfying the following relation: [mass % N]−0.15[mass % C]≧0.0060,  subsequently conducting secondary decarburization refining to a ultra low carbon concentration region while suppressing denitridation using a vacuum degassing facility, then conducting deoxidation by Al and, further, controlling the composition.

    摘要翻译： 一种适用于通过加工成型后的时效硬化处理而具有优异的时效硬化性的冷轧钢板的轧制材料的高氮超低碳钢的制造方法，在板坯或钢板中没有缺陷可靠地在 提出了降低成本和高生产率的方法。用于生产用于超低碳钢板的轧制材料的方法为：C <= 0.0050质量％包括：从高炉对铁水进行初级脱碳精炼，然后控制 初次脱碳精炼后的钢水中的组成达到满足以下关系的范围：接着，使用真空脱气装置进行二次脱碳精炼至超低碳浓度区域同时抑制脱氮，然后进行Al脱氧， 组成。