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    ARC WELDING METHOD AND WELDING WIRE
    2.
    发明公开
    ARC WELDING METHOD AND WELDING WIRE 审中-公开

    公开(公告)号：EP3620256A1

    公开(公告)日：2020-03-11

    申请号：EP18794059.8

    申请日：2018-04-26

    申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

    发明人： YASHIMA Takashi ,  SUZUKI Reiichi ,  MIYATA Minoru

    IPC分类号： B23K35/30 ,  B23K9/23 ,  C22C38/00 ,  C22C38/04

    摘要： The present invention relates to a method for arc-welding a steel plate having a C content of 0.08-0.30 % by mass, wherein the arc welding method comprises welding under a condition whereby X represented by formula (1) is 200 or less using a welding wire in which the total content of Cr and Ni thereof is 1.00% by mass or greater. (1): X = 0.8 × (300 - 279[C] W - 25[Si] W - 35[Mn] W - 49[Ni] W - 47[Cr] W - 61[Mo] W ) + 0.2 × (300-279[C] BM - 25[Si] BM - 35[Mn] BM - 49[Ni] BM - 47[Cr] BM - 61[MO] BM ) (where [C] W , [Si] W , [Mn] W , [Ni] W , [Cr] W , [Mo] W , [C] BM , [Si] BM , [Mn] BM , [Ni] BM , [Cr] BM , and [Mo] BM are defined in the specification).

    ARC SPOT WELDING METHOD
    3.
    发明公开
    ARC SPOT WELDING METHOD 审中-公开

    公开(公告)号：EP3495524A1

    公开(公告)日：2019-06-12

    申请号：EP17837012.8

    申请日：2017-08-02

    申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

    发明人： YASHIMA Takashi ,  SUZUKI Reiichi ,  MIYATA Minoru

    IPC分类号： C22C38/00 ,  B23K9/007 ,  B23K9/23 ,  B23K35/30 ,  C22C38/58

    摘要： The present invention pertains to: a method for arc spot welding a steel plate having a carbon equivalent CeqBM of 0.35 or more (the carbon equivalent CeqBM is defined in the specification), the method being characterized in that a welding wire containing 98.5 mass% or more of Fe is used, and the ratio between the carbon equivalent CeqWM of a weld metal formed by the method (the carbon equivalent CeqWM of the weld metal is defined in the specification) and the carbon equivalent CeqBM of the steel plate, CeqWM/CeqBM is 0.2-1.0. According to the arc spot welding method, brittle fracture can be prevented and high joint strength can be obtained even when the C content in the steel plate is high.

    FLUX CORED WIRE FOR GAS-SHIELDED ARC WELDING AND WELDING METHOD
    5.
    发明公开
    FLUX CORED WIRE FOR GAS-SHIELDED ARC WELDING AND WELDING METHOD 审中-公开
    用于气体保护焊接和焊接方法的药芯焊丝

    公开(公告)号：EP3290148A1

    公开(公告)日：2018-03-07

    申请号：EP16786431.3

    申请日：2016-04-22

    申请人： Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)

    发明人： MIYATA Minoru ,  SUZUKI Reiichi ,  YAMAZAKI Kei

    IPC分类号： B23K35/368 ,  B23K9/16 ,  B23K35/30 ,  C22C38/00 ,  C22C38/04

    CPC分类号： B23K35/3073 ,  B23K9/16 ,  B23K35/30 ,  B23K35/368 ,  B23K2103/04 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

    摘要： The purpose of the present invention is to provide a flux cored wire which has good high-temperature cracking resistance, and which enables the achievement of a welded part exhibiting excellent coating adhesion. The present invention relates to a metal flux cored wire for gas-shielded arc welding, which contains, relative to the total mass of the wire, 0.02-0.30% by mass of C, 0.3-1.5% by mass of Si, 0.3-2.5% by mass of Mn, and oxide of at least one element selected from the group consisting of Si, Cr and Ni in an amount of 0.01-0.30% by mass in total, 0.020% by mass or less of S, and 0.3% by mass or less of Al, Ca, Mg, K and Na in total in the form of metals or alloys, with the balance made up of Fe and unavoidable impurities.

    摘要翻译： 本发明的目的是提供一种具有良好的耐高温裂纹性，并且能够实现表现出优异的涂层密合性的焊接部的药芯焊丝。 气体保护电弧焊用金属药芯焊丝技术领域本发明涉及一种气体保护电弧焊用金属药芯焊丝，其相对于焊丝的总质量含有C：0.02〜0.30质量％，Si：0.3〜1.5质量％，0.3〜2.5 质量％的Mn和选自Si，Cr和Ni中的至少一种元素的氧化物，合计含量为0.01〜0.30质量％，S含量为0.020质量％以下，以及0.3质量％ 质量或更少的Al，Ca，Mg，K和Na以金属或合金的形式存在，余量由Fe和不可避免的杂质组成。