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    MULTI-ELECTRODE ELECTROGAS ARC WELDING METHOD FOR THICK STEEL PLATES AND MULTI-ELECTRODE ELECTROGAS ARC CIRCUMFERENTIAL WELDING METHOD FOR STEEL PIPES
    2.
    发明公开
    MULTI-ELECTRODE ELECTROGAS ARC WELDING METHOD FOR THICK STEEL PLATES AND MULTI-ELECTRODE ELECTROGAS ARC CIRCUMFERENTIAL WELDING METHOD FOR STEEL PIPES 有权
    FOR厚钢板的多电极内气体保护焊接工艺和多电极电双弧焊接圆钢管

    公开(公告)号：EP2954969A1

    公开(公告)日：2015-12-16

    申请号：EP13874504.7

    申请日：2013-03-01

    申请人： Nippon Steel & Sumitomo Metal Corporation

    发明人： HASHIBA, Yuuji ,  NOSE, Tetsuro

    IPC分类号： B23K9/173 ,  B23K9/00 ,  B23K9/025 ,  B23K9/028 ,  B23K9/095

    CPC分类号： B23K9/0282 ,  B23K9/0209 ,  B23K9/0216 ,  B23K9/0253 ,  B23K9/1735 ,  B23K2203/04

    摘要： Provided are a multi-electrode electrogas arc welding method for thick steel plates and a circumferential welding method for steel pipes that can establish both welding efficiency improvements and weld defect reduction when butt welding thick steel plates with a plate thickness of 40 - 300 mm or steel pipes to each other vertically. In the multi-electrode electrogas arc welding method, the ends of thick steel plates to be welded are disposed facing each other and a groove is formed therebetween, the root spacing (RO) and root surfaces (RF) at the groove satisfy a predetermined relationship, electrogas arc welding electrodes are disposed at each of both surface sides of the groove, welding is carried out simultaneously from the lower side to the upper side in the vertical direction, and the electrogas arc welding electrodes move in synchrony with the molten surface level of molten welding metal produced within the beveled gap.

    摘要翻译： 本发明提供一种多电极电气电弧焊接厚钢板的方法和钢管的周向焊接方法所做可以建立两个焊接效率的改进和焊接缺陷减少当对焊厚钢板具有40的板厚度至300mm或钢 管海誓山盟垂直。 在多电极电气电弧焊接方法中，待焊接的厚钢板的端部海誓山盟面对设置并且槽被形成在它们之间，在槽根部间距（RO）和根面（RF）满足预定关系 ，电气电弧焊接电极在各槽的两个表面侧布置，焊接从下侧同时进行上侧在垂直方向上，和电气电弧焊接电极在同步移动与熔液表面的水平 斜切间隙内产生的熔融焊接金属。

    METHOD OF IMPROVEMENT OF TOUGHNESS OF HEAT AFFECTED ZONE AT WELDED JOINT OF STEEL PLATE
    3.
    发明公开
    METHOD OF IMPROVEMENT OF TOUGHNESS OF HEAT AFFECTED ZONE AT WELDED JOINT OF STEEL PLATE 审中-公开
    提高钢板焊接接头热影响区韧性的方法

    公开(公告)号：EP3199648A1

    公开(公告)日：2017-08-02

    申请号：EP17156912.2

    申请日：2003-10-29

    申请人： Nippon Steel & Sumitomo Metal Corporation

    发明人： ISHIKAWA, Tadashi ,  NAKASHIMA, Kiyotaka ,  NOSE, Tetsuro

    IPC分类号： C21D7/06 ,  B23K31/00 ,  B23P9/04 ,  C21D9/50

    CPC分类号： C21D7/06 ,  B23K20/10 ,  B23K33/004 ,  B23K2203/04 ,  C21D7/04 ,  C21D9/50 ,  C21D10/00 ,  Y10T29/4578 ,  Y10T29/4583

    摘要： A method of improvement of toughness of a heat affected zone in a multi-layer welded joint, a fillet welded joint, and a one-pass or several-pass large heat input welded joint of a steel plate is provided, that is, a method of improvement of toughness of a heat affected zone in a welded joint of a steel plate characterized subjecting a surface of a heat affected zone formed by a last pass of a multi-layer welded joint of a steel plate to impacts by an ultrasonic vibration tool or shot peening by ultrasonic vibration steel balls to thereby make an average of longitudinal axis of crystal grains up to a depth of 2 mm or more from the surface of the steel plate in the microstructure adjacent to a fusion line (FL) of a weld metal and a steel plate matrix in said heat affected zone formed by the last pass the equivalent of the crystal grain size of the steel plate matrix before the welding at a depth of 1/4 of a thickness t from the surface of the steel plate.

    摘要翻译： 提供一种提高钢板的多层焊接接头，角焊接接头以及单程或多程大热量输入焊接接头中的热影响区的韧性的方法，即， 提高钢板的焊接接头中的热影响区的韧性的方法，其特征在于，对由钢板的多层焊接接头的最后通过形成的热影响区的表面进行超声波振动工具的冲击， 通过超声波振动钢球进行喷丸硬化处理，使得与焊接金属的熔合线（FL）邻接的微细结构体中的钢板表面的晶粒的长轴的平均距离为2mm以上， 在所述热影响区中由钢板基体形成的钢板基体在距钢板表面1/4厚度t的深度焊接之前的钢板基体的晶粒尺寸的等效值。

    PLASMA TORCH
    4.
    发明公开
    PLASMA TORCH 有权
    等离子体炬

    公开(公告)号：EP2689640A1

    公开(公告)日：2014-01-29

    申请号：EP11761161.6

    申请日：2011-02-25

    申请人： Nippon Steel & Sumitomo Metal Corporation

    发明人： HAMATANI, Hideki ,  TAKEUCHI, Sunao ,  WATANABE, Fuminori ,  NOSE, Tetsuro ,  SOLONENKO, Oleg Pavlovich ,  SMIRNOV, Andrey Vladimirovich

    IPC分类号： H05H1/34

    CPC分类号： H05H1/02 ,  H05H1/34 ,  H05H2001/3426 ,  H05H2001/3452 ,  H05H2001/3478 ,  H05H2001/3484

    摘要： A plasma torch comprises a cascade between a cathode and an anode. The cascade is an inter-electrode insert. An interior of the cascade is shaped so that a diameter of the interior expands in series in a plurality of steps from a side of the cathode to a side of the anode. As a result of the cascade being provided, the output power of the plasma torch is obtained not by an increase in the electric current but by an increase in the arc electric voltage. Therefore, the lifespan of each of the electrodes, i.e., the cathode and the anode, becomes remarkably longer. In addition, since a quasi laminar flow of the plasma is generated in the interior of the cascade, a fluctuation in the output power of the plasma jet is reduced. Thus, it is possible to lower the driving and operating costs. Therefore, it is possible to perform surface treatment such as plasma spraying, utilizing a high-performance plasma processing, a processing of refractory powder materials, and plasma chemistry processing and the like, with a high degree of efficiency. In addition, a side shield module is provided at an outlet side of the anode of the forming nozzle. The side shield module generates a gas shield jet which is coaxial, annular, and low-velocity. Thus, gas from the surrounding environment is prevented from flowing in. Consequently, oxygen is prevented from entering the forming nozzle and the plasma jet. Hence, it is possible to generate a plasma jet having a low Reynolds number of the plasma forming gas, with a quasi laminar flow, exhibiting low noise, the diameter of its cross section expanding in a stable manner, having a long plasma length, and comprising argon, nitrogen, and hydrogen.