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    Abrasion-resistant welded steel pipe
    3.
    发明授权
    Abrasion-resistant welded steel pipe 失效
    耐磨焊接钢管

    公开(公告)号：US5397654A

    公开(公告)日：1995-03-14

    申请号：US142249

    申请日：1993-10-22

    申请人： Shigeru Endo ,  Moriyasu Nagae ,  Osamu Hirano ,  Kazuyoshi Ume

    发明人： Shigeru Endo ,  Moriyasu Nagae ,  Osamu Hirano ,  Kazuyoshi Ume

    IPC分类号： C22C38/00 ,  B23K35/30 ,  C22C38/06 ,  C22C38/54 ,  C22C38/58 ,  F16L9/02 ,  B32B15/18

    CPC分类号： C22C38/06 ,  B23K35/3053 ,  F16L9/02 ,  Y10T428/12965

    摘要： An abrasion-resistant welded steel pipe having a base plate and a weld metal: consists essentially of 0.05 to 0.2 wt. % C, 0.5 to 2 wt. % Si, 0.5 to 2.5 wt. % Mn, 0.02 to 2 wt. % Al, the balance being Fe and inevitable impurities; and the steel pipe has a Vickers hardness of at least 200. The abrasion-resistant welded steel pipe can further contain at least one element selected from the group consisting of 0.05 to 1 wt. % Cu, 0.05 to 2 wt. % Ni, 0.05 to 2 wt. % Cr, 0.05 to 1 wt. % Mo, 0.005 to 0.1 wt. % Nb, 0.005 to 0.1 wt. % V, 0.005 to 0.1 wt. % Ti, 0.0003 to 0.002 wt. % B.

    摘要翻译： 具有基板和焊接金属的耐磨焊接钢管基本上由0.05至0.2重量％ ％C，0.5〜2重量％ ％Si，0.5〜2.5wt。 ％Mn，0.02〜2重量％ ％Al，余量为Fe和不可避免的杂质; 钢管的维氏硬度至少为200.耐磨焊接钢管还可以含有选自0.05〜1重量％的至少一种元素。 ％Cu，0.05〜2重量％ ％Ni，0.05〜2wt。 ％Cr，0.05〜1wt。 ％Mo，0.005〜0.1wt。 ％Nb，0.005〜0.1wt。 ％V，0.005〜0.1wt。 ％Ti，0.0003〜0.002重量％ ％B.

    Preventing magnetization of pipe blank in GMA welding
    5.
    发明授权
    Preventing magnetization of pipe blank in GMA welding 失效
    防止GMA焊接中管坯的磁化

    公开(公告)号：US4238659A

    公开(公告)日：1980-12-09

    申请号：US011412

    申请日：1979-02-12

    申请人： Fusao Koshiga ,  Jinkichi Tanaka ,  Itaru Watanabe ,  Motoaki Suzuki ,  Toshifumi Kojima ,  Hiroyoshi Matsubara ,  Tatsumi Osuka ,  Kenji Takeshige ,  Takashi Nagamine ,  Osamu Hirano

    发明人： Fusao Koshiga ,  Jinkichi Tanaka ,  Itaru Watanabe ,  Motoaki Suzuki ,  Toshifumi Kojima ,  Hiroyoshi Matsubara ,  Tatsumi Osuka ,  Kenji Takeshige ,  Takashi Nagamine ,  Osamu Hirano

    IPC分类号： B23K9/08 ,  B23K9/025 ,  B23K9/073 ,  B23K31/06

    CPC分类号： B23K9/0737

    摘要： In longitudinally seam-welding a pipe-blank for welded steel pipe from the inside along a groove by the GMA welding process which comprises using direct electric current supplied to a plurality of consumable electrodes in tandem through at least one cable as the welding current, at least two even-numbered consumable electrodes are used, half of said consumable electrodes being connected to said direct current so as to be positive in polarity and the remaining half of said consumable electrodes being connected to said direct current so as to be negative in polarity, to enable lines of magnetic force produced by said direct electric current for welding flowing through said at least one cable introduced into said pipe-blank to cancel each other, thereby preventing magnetization of said pipe-blank and the resulting magnetic arc blow of the welding arc.

    摘要翻译： 在通过GMA焊接工艺沿着沟槽从内侧纵向焊接焊接钢管的管坯，其包括通过至少一根电缆作为焊接电流串联地供给多个可消耗电极的直流电流， 使用至少两个偶数的可消耗电极，所述可消耗电极的一半连接到所述直流电，以使其极性为正，并且所述可消耗电极的剩余一半连接到所述直流电流以使其极性为负， 以使由所述直流电流产生的电磁线能够流过通过所述至少一根引入到所述管坯中的电缆而彼此抵消，从而防止所述管坯的磁化和焊接电弧产生的电弧冲击 。

    Method and apparatus for seam-welding steel pipes
    6.
    发明授权
    Method and apparatus for seam-welding steel pipes 失效
    钢管焊缝方法及装置

    公开(公告)号：US4341938A

    公开(公告)日：1982-07-27

    申请号：US215757

    申请日：1980-12-12

    申请人： Hiroyoshi Matsubara ,  Kenji Takeshige ,  Tatsumi Osuka ,  Takashi Nagamine ,  Osamu Hirano ,  Jinkichi Tanaka ,  Itaru Watanabe ,  Motoaki Suzuki

    发明人： Hiroyoshi Matsubara ,  Kenji Takeshige ,  Tatsumi Osuka ,  Takashi Nagamine ,  Osamu Hirano ,  Jinkichi Tanaka ,  Itaru Watanabe ,  Motoaki Suzuki

    IPC分类号： B23K9/025 ,  B23K9/02

    CPC分类号： B23K9/0253

    摘要： A method of longitudinally seam-welding steel pipes comprises the steps of providing a conductive net-like enclosure tube around a cable for supplying a direct electric current from the power source to the welding head; and conducting a direct electric current through the enclosure tube and through the steel pipe in a direction opposite to that in which the direct current runs through the cable. Apparatus for longitudinally seam-welding steel pipes comprises an electrical cable coupled to a welding head, a net tube surrounding the cable, and a device for supplying a direct electric current to the cable in a first direction and to the net enclosure tube and steel pipe in the opposite direction. The direct currents flowing in the enclosure tube and in the steel pipe is adjustably controlled to minimize the magnitude of a magnetic field created around the net enclosure tube and producing a welded steel pipe seam.

    摘要翻译： 一种纵向缝焊钢管的方法包括以下步骤：围绕电缆提供导电网状外壳管，用于从电源向焊接头提供直流电; 并且以与直流穿过电缆的方向相反的方向通过外壳管和通过钢管进行直流电流。 用于纵向焊缝钢管的装置包括耦合到焊接头的电缆，围绕电缆的网管，以及用于沿第一方向向电缆提供直流电流的装置，以及连接到网壳管和钢管 在相反的方向。 可调节地控制在封闭管和钢管中流动的直流电流，以使得围绕网罩管产生的磁场的大小最小化并产生焊接的钢管接缝。