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    PROCESS FOR PRODUCING TAPERED PLATE
    3.
    发明公开
    PROCESS FOR PRODUCING TAPERED PLATE 有权
    VERFAHREN ZUR HERSTELLUNG EINER KONISCHEN PLATTE

    公开(公告)号：EP2806042A1

    公开(公告)日：2014-11-26

    申请号：EP12865903.4

    申请日：2012-04-19

    申请人： JFE Steel Corporation

    发明人： YOKOTA, Tomoyuki ,  NAKAMURA, Masayoshi ,  HASE, Kazukuni ,  MITAO, Shinji

    IPC分类号： C21D8/02 ,  B21B1/38 ,  B21B3/00 ,  C22C38/00 ,  C22C38/14 ,  C22C38/58

    CPC分类号： C22C38/14 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/18

    摘要： Provide is a method for manufacturing a tapered plate having a tensile strength of 570 MPa or more capable of being subjected to high-heat input welding with a heat input of more than 300 kJ/cm. Specifically, the method includes heating to a temperature of 1000°C or higher and 1200°C or lower, a steel slab having a chemical composition containing, by mass%, C: 0.03% or more and 0.12% or less, Si: 0.03% or more and 0.5% or less, Mn: 0.8% or more and 2.2% or less, P: 0.015% or less, S: 0.0005% or more and 0.0050% or less, Al: 0.005% or more and 0.1% or less, Nb: 0.003% or more and 0.014% or less, Ti: 0.003% or more and 0.02% or less, B: 0.0003% or more and 0.0025% or less, N: 0.0030% or more and 0.0070% or less, Ca: 0.0005% or more and 0.0050% or less and the balance being Fe and inevitable impurities, in which expression (1) is satisfied, performing hot rolling on the heated slab in which plate thickness changes in the longitudinal direction so as to form a tapered shape at a finishing rolling temperature of 900°C or lower and equal to or higher than the Ar 3 point and then performing accelerated cooling on the hot-rolled steel plate down to a temperature of 500°C or lower:

    where N and Ti respectively represent the contents (mass%) of N and Ti.

    摘要翻译： 提供一种制造具有570MPa以上的拉伸强度的锥形板的方法，该锥形板能够以大于300kJ / cm的热输入进行高热输入焊接。 具体地说，该方法包括加热到1000℃以上且1200℃以下的温度，将以质量％计含有C：0.03％以上且0.12％以下的化学组成的钢坯，Si：0.03 ％以上且0.5％以下，Mn：0.8％以上且2.2％以下，P：0.015％以下，S：0.0005％以上且0.0050％以下，Al：0.005％以上且0.1％以下 Nb：0.003％以上且0.014％以下，Ti：0.003％以上且0.02％以下，B：0.0003％以上且0.0025％以下，N：0.0030％以上且0.0070％以下， Ca：0.0005％以上且0.0050％以下，余量为Fe和不可避免的杂质，在满足式（1）的情况下，对板厚进行纵向变化的加热板坯进行热轧，形成 在900℃以下并且等于或高于Ar 3点的精轧温度下的锥形，然后在热轧钢板上进行加速冷却至500℃以下的温度： 其中N和Ti分别表示N和Ti的含量（质量％）。

    HIGH-TENSILE STRENGTH STEEL AND MANUFACTURING METHOD THEREOF
    4.
    发明公开
    HIGH-TENSILE STRENGTH STEEL AND MANUFACTURING METHOD THEREOF 有权
    哈佛大学医学院麻省理工学院

    公开(公告)号：EP2272994A1

    公开(公告)日：2011-01-12

    申请号：EP09726619.1

    申请日：2009-03-27

    申请人： JFE Steel Corporation

    发明人： ICHIMIYA, Katsuyuki ,  YOKOTA, Tomoyuki ,  NISHIMURA, Kimihiro ,  SHIKANAI, Nobuo

    IPC分类号： C22C38/14 ,  C22C38/58 ,  C21D8/02

    CPC分类号： C22C38/14 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

    摘要： Proposed are a high-tensile strength steel that is excellent in strength and toughness of the base material and also excellent in toughness of the weld heated zone, even if the steel has a large thick, and a method of advantageously manufacturing the steel. Specifically, the high-tensile strength steel has a component composition including, in mass%, C: 0.03 to 0.10%, Si: 0.30% or less, Mn: 1.60 to 2.30%, P: 0.015% or less, S: 0.005% or less, Al: 0.005 to 0.06%, Nb: 0.004 to 0.05%, Ti: 0.005 to 0.02%, N: 0.001 to 0.005%, Ca: 0.0005 to 0.003%, and the balance of Fe and inevitable impurities so that Ca, S, and O satisfy the following expression (1): 0 Ca - 0.18 + 130 × Ca × 0 / 1.25 / S 1
    wherein, Ca, S, and O represent the respective contents (mass%) of the elements.

    摘要翻译： 提出了即使钢具有较大的厚度也能够使基材的强度和韧性优异且焊接加热区域的韧性优异的高强度钢，以及有利地制造钢的方法。 具体地说，高强度钢的组成成分按质量％计含有C：0.03〜0.10％，Si：0.30％以下，Mn：1.60〜2.30％，P：0.015％以下，S：0.005％ 以下，Al：0.005〜0.06％，Nb：0.004〜0.05％，Ti：0.005〜0.02％，N：0.001〜0.005％，Ca：0.0005〜0.003％，余量由Fe和不可避免的杂质构成， S和O满足以下表达式（1）：0

    NICKEL ALLOY CLAD STEEL SHEET AND METHOD FOR PRODUCING SAME
    5.
    发明公开
    NICKEL ALLOY CLAD STEEL SHEET AND METHOD FOR PRODUCING SAME 审中-公开
    镍合金包钢板及其制造方法

    公开(公告)号：EP3219820A1

    公开(公告)日：2017-09-20

    申请号：EP15859180.0

    申请日：2015-11-09

    申请人： JFE Steel Corporation

    发明人： YOKOTA, Tomoyuki ,  TACHIBANA, Shunichi ,  KURONUMA, Yota ,  SUEYOSHI, Hitoshi

    IPC分类号： C22C38/00 ,  B23K20/04 ,  C21D9/00 ,  C22C38/14 ,  C22C38/58 ,  C21D9/46 ,  C22C19/03 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  B32B15/01 ,  B21B1/38

    摘要： Provided is a nickel-base alloy-clad steel plate that is a clad steel plate including a cladding metal composed of a nickel-base alloy such as Alloy825 or Alloy625, the clad steel plate including a base metal containing a large amount of Nb and stably having a DWTT property (i.e., the capability of stopping the propagation of brittle fracture) of 85% or more in terms of shear fracture percentage at a test temperature of -25°C, the clad steel plate having excellent corrosion resistance and an excellent bonding property. Also provided is a method for producing the nickel-base alloy-clad steel plate.
    The nickel-base alloy-clad steel plate includes a cladding metal composed of a nickel-base alloy and a base metal composed of low-alloy steel having a specific composition. The base metal includes a bainite microstructure having an average grain size of 30 µm or less and has an excellent DWTT property.

    摘要翻译： 本发明提供一种镍基合金包覆钢板，其为包含由合金825或合金625等镍基合金构成的包层金属的包层钢板，该包层钢板包含含有大量Nb的母材，并且稳定 在-25℃的试验温度下具有85％以上的剪切破坏率的DWTT特性（即，阻止脆性断裂扩展的能力），具有优异的耐腐蚀性和优异的接合性的包层钢板 属性。 还提供了生产镍基合金包层钢板的方法。 镍基合金包层钢板包括由镍基合金构成的包层金属和由具有特定组成的低合金钢构成的基体金属。 母材包含平均结晶粒径为30μm以下的贝氏体组织，DWTT特性优异。

    WELDING TORCH FOR FIRST ELECTRODE FOR MULTI-ELECTRODE SUBMERGED ARC WELDING AND WELDING METHOD USING SAME
    7.
    发明公开
    WELDING TORCH FOR FIRST ELECTRODE FOR MULTI-ELECTRODE SUBMERGED ARC WELDING AND WELDING METHOD USING SAME 审中-公开
    火炬下粉末焊接第一引线带有多个电极和焊接工艺

    公开(公告)号：EP2823927A1

    公开(公告)日：2015-01-14

    申请号：EP13757053.7

    申请日：2013-03-07

    申请人： JFE Steel Corporation

    发明人： YOKOTA, Tomoyuki ,  HAYAKAWA, Naoya ,  KAWAI, Keiji ,  YANO, Koji

    IPC分类号： B23K9/18

    CPC分类号： B23K9/282 ,  B23K9/123 ,  B23K9/188 ,  B23K9/26 ,  B23K35/0266 ,  B23K2101/04 ,  B23K2101/06

    摘要： The present invention provides a welding technology that allows stable welding even if a thin wire is used as a leading electrode in multiple-electrode submerged arc welding, particularly if welding is performed under welding conditions involving high wire feeding speed, or even if a flux-cored wire is used in which large winding remains after straightening.
    Provided are a welding torch, for use with a leading electrode in multiple-electrode submerged arc welding, that includes a contact tip, a connector for a power cable, a tube-shaped conductor disposed therebetween, and means for insulating the tube-shaped conductor from an electrode wire, and a multiple-electrode submerged arc welding method using such a welding torch.

    摘要翻译： 本发明提供一种焊接技术确实允许即使细线用作埋弧焊多电极的先行电极，尤其是当焊接焊接条件涉及高焊丝进给速度，或即使通量下进行稳定的焊接 药芯焊丝是在其中大绕组保持拉直后使用。 本发明提供一种焊炬，用于与在多电极的先行电极埋弧焊接使用，没有包括接触尖端，用于电源电缆的连接器，管形导体的装置，以及布置在其间绝缘筒状导体 从上电极丝，和一个多电极埋弧焊接方法，使用焊炬检查。

    STEEL MATERIAL FOR HIGH-HEAT-INPUT WELDING
    8.
    发明公开
    STEEL MATERIAL FOR HIGH-HEAT-INPUT WELDING 审中-公开
    用于高热输入焊接的钢材

    公开(公告)号：EP2801638A1

    公开(公告)日：2014-11-12

    申请号：EP12870014.3

    申请日：2012-03-01

    申请人： JFE Steel Corporation

    发明人： YOKOTA, Tomoyuki ,  NABESHIMA, Seiji ,  NISHIMURA, Kimihiro ,  MITAO, Shinji

    IPC分类号： C22C38/14 ,  C22C38/58

    CPC分类号： C22C38/14 ,  B23K35/3053 ,  B23K35/3073 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16 ,  C22C38/28

    摘要： Provided is a structural steel plate suitable for high heat input welding with a welding heat input of more than 300 kJ/cm and suitable for various structures in fields such as shipbuilding, architecture, and civil engineering. Specifically, the structural steel plate has a chemical composition containing, in percent by mass, 0.03% to 0.08% carbon, 0.01% to 0.15% silicon, 1.8% to 2.6% manganese, 0.008% or less phosphorus, 0.0005% to 0.0040% sulfur, 0.005% or less aluminum, 0.003% to 0.03% niobium, 0.005% to 0.030% titanium, 0.0050% to 0.0080% nitrogen, 0.0003% to 0.0025% boron, and optionally at least one of vanadium, copper, nickel, chromium, molybdenum, calcium, magnesium, zirconium, and a rare earth metal, and having a Ceq (IIW) of 0.33 to 0.45, the balance being iron and incidental impurities. The structural steel plate has a prior austenite grain diameter of 200 µm or less and a martensite-austenite constituent area fraction of 1.0% or less in a heat-affected zone microstructure adjacent to a fusion line after high heat input welding with a welding heat input of more than 300 kJ/cm.

    摘要翻译： 本发明提供一种适用于焊接输入功率超过300kJ / cm的高输入热量焊接的结构用钢板，适用于造船，建筑，土木等领域的各种构造。 具体地说，结构钢板的化学成分以质量百分比计含有碳0.03〜0.08％，硅0.01〜0.15％，锰1.8〜2.6％，磷0.008％以下，硫0.0005〜0.0040％ ，0.005％或更少的铝，0.003％至0.03％的铌，0.005％至0.030％的钛，0.0050％至0.0080％的氮，0.0003％至0.0025％的硼和任选的钒，铜，镍，铬，钼 ，钙，镁，锆和稀土金属，Ceq（IIW）为0.33〜0.45，其余为铁和不可避免的杂质。 结构钢板在与焊接热输入的高热输入焊接后的熔接线相邻的热影响区域微细组织中，原奥氏体粒径为200μm以下，马氏体 - 奥氏体组成面积率为1.0％以下 超过300 kJ / cm。