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    Soft stainless steel sheet excellent in workability
    1.
    发明授权
    Soft stainless steel sheet excellent in workability 有权
    软不锈钢板加工性优良

    公开(公告)号：US06723181B2

    公开(公告)日：2004-04-20

    申请号：US10120727

    申请日：2002-04-11

    申请人： Hanji Ishikawa ,  Masato Otsuka ,  Satoshi Suzuki ,  Hideki Tanaka ,  Junichi Katsuki ,  Takashi Yamauchi ,  Naoto Hiramatsu

    发明人： Hanji Ishikawa ,  Masato Otsuka ,  Satoshi Suzuki ,  Hideki Tanaka ,  Junichi Katsuki ,  Takashi Yamauchi ,  Naoto Hiramatsu

    IPC分类号： C22C3842

    CPC分类号： C22C38/004 ,  C21D8/04 ,  C21D8/0405 ,  C21D8/0463 ,  C21D8/0473 ,  C22C38/001 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58

    摘要： A new soft stainless steel sheet has an austenite-stability index Md30 controlled in a range of −120 to −10 and a stacking fault formability index SFI controlled not less than 30, and involves precipitates whose Cu concentration is controlled not more than 1.0%, so as to maintain concentration of dissolved Cu at 1-5%. The stainless steel sheet preferably contains up to 0.06%(C+N), up to 2.0% Si, up to 5% Mn, 15-20% Cr, 5-9% Ni, 1.0-4.0% Cu, up to 0.003% Al, up to 0.005% S, and optionally one or more of up to 0.5% Ti, up to 0.5% Nb, up to 0.5% Zr, up to 0.5% V, up to 3.0% Mo, up to 0.03% B, up to 0.02% REM (rare earth metals) and up to 0.03% Ca. The stainless steel sheet can be plastically deformed to an objective shape without any cracks even at a part heavily-worked part by multi-stage deep drawing or compression deforming. Md30(° C.)=551−462(C+N)−9.2Si−8.1Mn−29(Ni+Cu)−13.7Cr−18.5Mo SFI(mJ/m2)=2.2Ni+6Cu−1.1Cr−13Si−1.2Mn+32.

    摘要翻译： 新的软质不锈钢板的奥氏体稳定性指数Md30控制在-120〜-10的范围内，堆积层错性成形性指数SFI控制在30以上，并且将Cu浓度控制在1.0％以下的析出物， 以使溶解的Cu的浓度保持在1-5％。 不锈钢板优选含有高达0.06％（C + N），至多2.0％Si，至多5％Mn，15-20％Cr，5-9％Ni，1.0-4.0％Cu，至多0.003％ Al，至多0.005％的S，以及任选的一种或多种至多0.5％的Ti，至多0.5％的Nb，至多0.5％的Zr，至多0.5％的V，至多3.0％的Mo，至多0.03％的B， 高达0.02％的REM（稀土金属）和高达0.03％的Ca。 不锈钢板可以通过多级深冲压或压缩变形而塑造变形为客观形状，也不会在部分重型加工部分产生任何裂缝。

    Method of manufacturing a metal pipe with an eccentrically expanded open end
    4.
    发明授权
    Method of manufacturing a metal pipe with an eccentrically expanded open end 有权
    制造具有偏心扩大的开口端的金属管的方法

    公开(公告)号：US06581433B2

    公开(公告)日：2003-06-24

    申请号：US09962919

    申请日：2001-09-24

    申请人： Masato Otsuka ,  Hanji Ishikawa

    发明人： Masato Otsuka ,  Hanji Ishikawa

    IPC分类号： B21D4102

    CPC分类号： B21D41/02 ,  B21C37/16

    摘要： A method of manufacturing a metal pipe with an eccentrically expanded open end comprises the steps of plastically deforming to a coaxially expanded state M1 so that an axial wall length L2 at a side to be eccentrically expanded is longer than an axial wall length L1 at the opposite side to be expanded without eccentricity. The coaxially expanded open end M1 is then plastically deformed to an eccentrically expanded state M2 by forcibly inserting an eccentrically expanding punch into the coaxially expanded open end M1. The eccentrically expanding punch has a boundary between a conical tip and a cylindrical body inclined with a predetermined angle &thgr; so as to bring the cylindrical body into contact with an inner wall of the coaxially expanded open end M1 at a side to be eccentrically expanded earlier than the opposite side to be expanded without eccentricity. When the coaxially expanded open end M1 is plastically deformed to an eccentrically expanded state M2, metal flow is suppressed at a side to, be eccentrically expanded, but metal flow from the opposite side to be expanded without eccentricity to the former side is promoted. Consequently, the open end is plastically deformed to the eccentrically expanded state M2 without any thickness deviation along a circumferential direction.

    摘要翻译： 制造具有偏心扩大的开口端的金属管的方法包括塑性变形到同轴扩张状态M1的步骤，使得在偏心膨胀的一侧上的轴向壁长度L2比相对的轴向壁长度L1长 侧面无偏心扩张。 然后通过将偏心扩张的冲头强制地插入到同轴扩展的开口端M1中，将同轴扩大的开口端M1塑性地变形到偏心扩张状态M2。 偏心膨胀的冲头在锥形尖端和以预定角度θ倾斜的圆柱体之间具有边界，以便使圆筒体与同轴展开的开口端M1的内壁在一侧相比偏心膨胀 相反的一面要扩大而不偏心。 当同轴扩大的开口端M1被塑性变形到偏心扩张状态M2时，金属流动被抑制在一侧以被偏心地扩大，但是金属从相对侧流动而不偏心到前者。 因此，开口端塑性地变形到偏心扩张状态M2，而沿圆周方向没有任何厚度偏差。