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公开(公告)号：EP2929973B1
公开(公告)日：2019-05-29
申请号：EP13860297.4
申请日：2013-12-03
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公开(公告)号：EP2929973A1
公开(公告)日：2015-10-14
申请号：EP13860297.4
申请日：2013-12-03
CPC分类号： B23K9/0213 , B23K9/173
摘要： A method for gas-shielded arc welding to join thick steel materials having a sheet thickness of 22 mm or more by narrow-groove multilayer welding, a bottom portion groove angle being 10° or less, and a bottom portion groove gap being 7-15 mm, includes using two passes or more for initial layer welding, distributing the passes over both sides of the bottom portion groove gap, and controlling a feed angle of a weld wire fed from a power supply tip of a welding torch end to be 5-15° with respect to a perpendicular line so as to set a depth of fusion at a bottom portion of the thick steel materials to be 1.5 mm or more. Even when using low-cost groove formation by gas cutting, plasma cutting, or the like, defects such as high-temperature cracks and lack of fusion can effectively be prevented without treating the groove face.
摘要翻译： 一种气体保护电弧焊接方法，通过窄槽多层焊接，厚度为22mm以上的厚钢材料，底部槽角为10°以下，底部槽间隙为7〜15 mm，包括使用两次或更多次进行初始层焊，分配通过底部槽间隙的两侧的通过，并且控制从焊炬端的供电端供给的焊丝的进给角度为5- 相对于垂直线15°，以使厚钢材的底部的熔融深度为1.5mm以上。 即使在通过气切割，等离子切割等低成本的槽形成的情况下，也可以在不对槽面进行处理的情况下有效地防止高温裂纹，熔融不足等缺陷。
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3.发明公开
公开(公告)号：EP2128288A1
公开(公告)日：2009-12-02
申请号：EP08704511.8
申请日：2008-01-31
发明人： NAGAO, Akihide , OI, Kenji , HAYASHI, Kenji , SHIKANAI, Nobuo
CPC分类号： C21D8/0205 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06
摘要： High tensile strength steels that have both favorable delayed fracture resistance and a tensile strength of 600 MPa or higher and are suitably used in construction machinery, tanks, penstocks, and pipelines, as well as methods for manufacturing such steels are provided. More specifically, what is provided is a steel preferably containing elements C, Si, Mn, Al, N, P, and S; one or more of Mo, Nb, V, Ti, Cu, Ni, Cr, W, B, Ca, REM, and Mg if necessary; and Fe and unavoidable impurities as the balance, wherein the average aspect ratio of prior austenite grains calculated over the entire thickness is at least three and, if necessary, hydrogen is charged into the steel whose cementite covering ratio of laths is 50% or lower and the hydrogen contained in the steel is sealed by zinc galvanizing, the safety index of delayed fracture resistance calculated using the formula described below being at least 75% when a slow strain rate test is performed with the strain rate set to 1 × 10 -3 /s or lower. A steel having the composition described above is cast, protected from cooling to the Ar 3 transformation temperature or lower or heated to a temperature equal to or higher than the Ac 3 transformation temperature once again, hot rolled with the rolling reduction for non-recrystallization regions set to 30% or higher, directly quenched from a temperature equal to or higher than the Ar 3 transformation temperature, and then tempered so that the maximum temperature at the middle of the steel thickness is equal to or lower than the Ac 1 transformation temperature. The safety index of delayed fracture resistance (%) = 100 × (X 1 /X 0 ), where X 0 : reduction of area of a specimen substantially free from diffusible hydrogen, and X 1 : reduction of area of a specimen containing diffusible hydrogen.
摘要翻译： 高拉伸强度的钢thathave两个有利耐延迟断裂特性和为600MPa或更高的拉伸强度和在建筑机械，罐，压力水管，及管道中，以及为制造方法，适合使用已审查提供钢。 更具体地，所提供的是优选含元素C，硅，锰，铝，N，P和S的钢; 一种或多种钼，铜，铌，钒，钛，镍，铬，W，B，钙，REM，Mg中如果必要的; 为Fe和不可避免的杂质：作为平衡，worin计算在整个厚度原奥氏体晶粒的平均纵横比为至少3，如有必要，将氢气充入钢谁的渗碳覆盖板条的比例为50％或更低和 包含在钢中的氢被锌镀锌密封，使用下面描述为至少75％。当慢应变速率试验是用设置为应变速度进行下式计算耐延迟断裂特性的安全指数1×10 -3 / s或更低。 具有上述组成的钢铸造，从冷却到Ar 3相变温度或更低或加热到等于或高于Ac 3相变温度高的温度保护再次，热轧具有用于未再结晶区的压下 设定为30％或更高，直接从比Ar 3相变温度等于或更高的温度下猝灭，然后回火所以没有在钢厚度的中间的最大温度低于Ac 1相变温度等于或更低。 耐延迟断裂特性（％）= 100×（X 1 / X 0），所述的安全指数，其中X 0：减少从扩散性氢基本上不含试样的区域的，和X 1：还原含扩散性氢的样本的面积的 ，
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公开(公告)号：EP2965848B1
公开(公告)日：2019-08-14
申请号：EP14759633.2
申请日：2014-01-24
发明人： OKITA, Yasuaki , SAWANISHI, Chikaumi , IKEDA, Rinsei , OI, Kenji
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5.发明公开JOINED BODY OF STEEL SHEETS, METHOD FOR MANUFACTURING JOINED BODY OF STEEL SHEETS, AND SPOT WELDING METHOD 审中-公开钢板连接体，钢板连接体的制造方法和点焊方法
公开(公告)号：EP3254796A1
公开(公告)日：2017-12-13
申请号：EP16746280.3
申请日：2016-01-22
CPC分类号： B23K11/163 , B23K11/11 , B23K11/16 , B23K11/34 , B23K2203/04 , B32B15/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/60
摘要： Provided is an assembly capable of maintaining the necessary strength of a weld in steps of manufacturing the assembly and in use of the assembly.
A steel sheet assembly according to the present invention includes a plurality of lapped steel sheets which have a composition containing C: 0.4% or less, Si: 3.0% or less, Al: 3.0% or less, Mn: 0.2% to 6.0%, P: 0.1% or less, and S: 0.07% or less on a mass basis, the remainder being Fe and inevitable impurities, and which have a tensile strength of 1,470 MPa or less and a thickness of 0.3 mm to 5.0 mm, the steel sheet assembly being formed by applying, in advance, an adhesive and a carbon-supplying agent to a surface of either or both of the steel sheets to be lapped and then welding the steel sheets. A weld of the assembly has a nugget diameter of 2.8√t (mm) or more, where t denotes the thickness of a thinner one of the steel sheets on both sides of a weld interface, and the amount of C is increased by 0.02% by mass or more as compared to the steel sheets before being applied with the adhesive and the carbon-supplying agent.摘要翻译： 提供了一种能够在制造组件和使用该组件的步骤中保持焊接所需的强度的组件。 根据本发明的钢板组件包括多个搭接钢板，所述搭接钢板具有包含C：0.4％以下，Si：3.0％以下，Al：3.0％以下，Mn：0.2％〜6.0％ P：0.1％以下，S：0.07％以下，余量为Fe和不可避免的杂质，抗拉强度为1470MPa以下，厚度为0.3〜5.0mm，钢 通过预先将粘合剂和碳供给剂施加到待研磨的钢板中的一个或两个的表面上然后焊接钢板而形成。 组件的焊缝具有2.8√t（mm）或更大的熔核直径，其中t表示焊接界面两侧的薄钢板的厚度，并且C的量增加0.02％ 与涂布粘合剂和碳供给剂之前的钢板相比，可以提高一定量以上。
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6.发明公开
公开(公告)号：EP2402106A1
公开(公告)日：2012-01-04
申请号：EP10746369.7
申请日：2010-02-25
IPC分类号： B23K9/16 , B23K9/09 , B23K9/173 , B23K9/18 , B23K103/04
CPC分类号： B23K9/1735 , B23K9/025 , B23K9/09 , B23K9/188 , B23K28/02 , B23K33/004 , B23K2201/18 , B23K2203/04
摘要： Provided are a combination welding method and a combination arc welding machine thereof having excellent construction efficiency and preventing a deterioration of toughness of a HAZ by maintaining the current density of each of gas matal arc welding and submerged-arc welding within an appropriate range at the time of welding a steel plate by the combination of the gas matal arc welding using multielectrodes and the submerged-arc welding using multielectrodes. Specifically, in a combination welding method and a combination arc welding machine thereof for performing gas matal arc welding on a butted portion between steel plates and performing submerged-arc welding behind the gas matal arc welding, the gas matal arc welding is performed using two or more electrodes, a wire for welding having a wire diameter of 1.4 mm or more is used in the first electrode of the gas matal arc welding, and a current density of the first electrode is set to 320 A/mm 2 or more.
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7.发明公开WELDED STEEL PIPE WELDED WITH A HIGH ENERGY DENSITY BEAM, AND A MANUFACTURING METHOD THEREFOR 有权与用于生产高能量密度焊接钢管和处理JET
公开(公告)号：EP2258493A1
公开(公告)日：2010-12-08
申请号：EP09727339.5
申请日：2009-03-30
发明人： YANO, Koji , OI, Kenji
CPC分类号： F16L9/02 , B21C37/0811 , B23K13/046 , B23K26/262 , B23K2201/06 , B23K2203/04 , B23K2203/05
摘要： Provided are a welded steel pipe that is joined with a high-energy-density beam so that there are no welding defects in the seam, and a method for efficiently producing the welded steel pipe. Specifically, a steel strip is formed into a cylinder so that opposite ends of the steel strip face each other, while continuously conveying the steel strip, the opposite ends are melted across the entire thickness by irradiating the opposite ends with a high-energy-density beam while applying a pressure with squeeze rolls, a seam is formed by joining the opposite ends, excess weld metal of the seam on the outer side and the inner side of the obtained welded steel pipe is removed by cutting, a repaired seam is then formed by remelting and solidifying a region on the inner side of the welded steel pipe, the region having a depth of 0.5 mm or more from the surface and a width of double or more the width of the seam, and in addition, the center line of the seam is made to coincide with the center line of the repaired seam.
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8.发明公开
公开(公告)号：EP2255915A1
公开(公告)日：2010-12-01
申请号：EP09713534.7
申请日：2009-02-19
发明人： ISHIGAMI, Atsushi , OI, Kenji , HAYAKAWA, Naoya
IPC分类号： B23K9/18 , B23K9/00 , B23K9/025 , B23K9/032 , B23K101/06
CPC分类号： B23K9/188 , B23K9/0253 , B23K9/0282 , B23K2201/06 , B23K2203/04
摘要： Provided is a multiple-electrode submerged arc welding method, for steel, suitable for welding in the manufacture of large-diameter steel pipes, such as UOE steel pipes or spiral steel pipes, formed of base materials ranging in thickness from 10 to 50 mm.
Specifically, steel is subjected to multiple-electrode submerged arc welding with three or more electrodes in which a direct-current power source is used to supply current to a first electrode, the welding by the first electrode is carried out at a current density of 250 A/mm 2 or more, preferably with a wire diameter of 3.2 mm or less and a weld current of 1,000 A or more, the welding by the second electrode is carried out at a current density of 150 A/mm 2 or more, preferably with a weld current of 600 A or more, one of the interelectrode spacings is 23 mm or more on a surface of the steel, and the remaining interelectrode spacings are 20 mm or less.-
公开(公告)号：EP2322312B1
公开(公告)日：2020-01-08
申请号：EP09770280.7
申请日：2009-06-22
IPC分类号： B23K101/10 , B23K103/04 , B23K26/262 , B23K26/348 , B23K101/06 , B23K26/03
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公开(公告)号：EP2692476B1
公开(公告)日：2018-11-21
申请号：EP11862698.5
申请日：2011-04-28
发明人： YANO, Koji , SUMI, Hiroyuki , OI, Kenji
IPC分类号： B23K26/20 , B21C37/08 , B23K26/00 , B23K26/04 , B23K26/067
CPC分类号： B23K26/282 , B21C37/08 , B23K26/0608 , B23K26/262 , B23K26/32 , B23K2103/04 , B23K2103/50
摘要： Provided is a method of stably manufacturing a laser welded steel pipe having a high quality weld portion at a high yield ratio by laser welding while a typical problem of the laser welding of frequent occurrence of undercut or underfill is solved. Specifically, a method of manufacturing a laser welded steel pipe by forming a steel strip into a cylindrical open pipe with forming rolls and performing laser welding on edges of the open pipe by emitting a laser beam while pressing the edges with squeeze rolls, the laser welding including: emitting two laser beams along the edges from an upper surface side of the open pipe, the two laser beams being transmitted through different optical fibers and having in-focus spot diameters exceeding 0.3 mm; emitting the laser beams such that a leading laser beam of the two laser beams and a trailing laser beam of the two laser beams are each inclined toward a direction in which welding proceeds at an incident angle with respect to a direction perpendicular to an upper surface of the open pipe, the leading laser beam being ahead of the trailing laser beam on the upper surface of the open pipe in the direction in which welding proceeds, the trailing laser beam being behind the leading laser beam; setting the incident angle of the leading laser beam to be larger than the incident angle of the trailing laser beam; and setting a gap between a center point of the leading laser beam and a center point of the trailing laser beam on a back surface of the open pipe to 1 mm or larger.
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