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1. 发明公开

US20240198446A1 SUBMERGED ARC WELDED JOINT 审中-公开
公开(公告)号：US20240198446A1
公开(公告)日：2024-06-20
申请号：US18287383
申请日：2022-03-31
申请人： JFE STEEL CORPORATION
发明人： Atsushi TAKADA , Atsushi ISHIGAMI , Kazufumi WATANABE
IPC分类号： B23K9/18 , B23K9/23 , B23K35/30
CPC分类号： B23K9/18 , B23K9/23 , B23K35/30
摘要： A submerged arc welded joint having a weld metal formed by performing submerged arc welding with a heat input of 300 kJ/cm or more. The joint has a weld metal having a specified chemical composition, specified yield strength, and specified tensile strength. The weld metal has a specified absorbed energy vE0, as measured by a V-notch Charpy impact test performed at a testing temperature of 0° C. Ceq is in a range of 0.65 to 1.00, and a is 6.0 or less, as expressed by the equations below.

Ceq=[C]+0.17[Mn]+0.04[Si]+0.025[Ni]+0.2[Cr]+0.25[Mo] (1)

α=30[C]+0.7[Mn]+[Ni]−([Si]+0.5[Cr]+1.5[Mo]) (2)

Here, in the equation (1) and the equation (2), the expression “[element symbol]” denotes a content (mass %) of the corresponding element in the weld metal described above.

2. 发明申请

US20150306694A1 SUBMERGED ARC WELDING METHOD FOR STEEL PLATE 有权
标题翻译：钢板焊接弧焊方法
公开(公告)号：US20150306694A1
公开(公告)日：2015-10-29
申请号：US14360794
申请日：2012-11-28
申请人： JFE STEEL CORPORATION
发明人： Atsushi ISHIGAMI , Naoya HAYAKAWA , Koji YANO
IPC分类号： B23K9/18 , B23K9/23
CPC分类号： B23K9/188 , B23K9/23 , B23K33/006 , B23K2101/06 , B23K2103/04
摘要： The present invention provides a submerged arc welding method attempting to enhance toughness of a welded zone with low heat input and capable of achieving deep penetration and a sufficiently wide bead width in welding a thick material at a weld speed of 3 m/min or less. In the submerged arc welding method, a first electrode at the head in a welding direction has a wire diameter of 3.9 to 4.1 mm, two electrodes are arranged on both sides holding a weld line therebetween at the tail end in the welding direction, the wire tip positions of the two electrodes on a surface of the steel plate are arranged on the same line vertical to the weld line, and a distance W (mm) between each of the wire tip positions and the weld line is 5 to 20 mm.
摘要翻译：本发明提供了一种埋弧焊接方法，其以低的热输入提高焊接区的韧性，并且能够以3m / min或更小的焊接速度焊接厚材料，并能够实现深度穿透和足够宽的焊道宽度。在埋弧焊方法中，焊接方向的头部的第一电极的线径为3.9〜4.1mm，在焊接方向的尾端保持焊接线的两侧的两侧配置有两个电极，钢板表面上的两个电极的尖端位置与垂直于焊接线的相同的线布置，并且每个线尖位置和焊接线之间的距离W（mm）为5至20mm。

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