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1. 发明专利

JP2005279767A Lime-based covered electrode, welding method and welded joint 审中-公开
标题翻译：基于极限覆盖电极，焊接方法和焊接接头
公开(公告)号：JP2005279767A
公开(公告)日：2005-10-13
申请号：JP2004101563
申请日：2004-03-30
申请人： Jfe Steel Kk , Jfeスチール株式会社 , Kawatetsu Techno Res Corp , National Institute For Materials Science , Nippon Welding Rod Kk , 川鉄テクノリサーチ株式会社 , 日本ウエルディング・ロッド株式会社 , 独立行政法人物質・材料研究機構
发明人： HAYAKAWA NAOYA , SATO HIROTERU , HIRAOKA KAZUO , NAKAMURA TERUMI , MORIKAGE YASUSHI , KUBO TAKAHIRO , YASUDA KOICHI , SAITO TEIICHIRO , ITO TADASHI , YOSHIDA MASAYA
IPC分类号： B23K9/23 , B23K35/365 , B23K103/04 , C22C38/00 , C22C38/40 , C22C38/48
摘要： PROBLEM TO BE SOLVED: To obtain an excellently shaped weld bead even in a state as-welded, to improve soundness of a welded joint by suppressing occurrence of welding defects such as lack of fusion without performing grinding, and also to greatly enhance fatigue strength of a welded joint through a smooth weld bead and suppressed undercut.
SOLUTION: A covered electrode is used in which an alloy core wire is coated with a coating flux in which CaF
2 has such a particle distribution that the amount of particles of 30 mass% and the mass ratio (CaCO
3 /CaF
2 ) of CaCO
3 to CaF
2 is 0.4-7.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了获得即使在焊接状态下的良好的形状的焊缝，通过抑制焊接缺陷的发生（如不进行研磨）也可以提高焊接接头的良好性，并且还大大提高焊接接头通过光滑焊缝的疲劳强度和抑制底切。
解决方案：使用覆盖电极，其中合金芯线涂覆有涂层焊剂，其中CaF 2 具有这样的颗粒分布，使得<105μm的颗粒的数量≤30 质量％，105-1,680μm的颗粒的量为> 30质量％，CaCO 3的质量比（CaCO 3 / CaF 2 SB>至CaF 2 为0.4-7。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2005279768A Flux cored wire for welding and weld joint for steel structure 审中-公开
标题翻译：用于焊接和焊接接头的钢丝绳用于钢结构
公开(公告)号：JP2005279768A
公开(公告)日：2005-10-13
申请号：JP2004101564
申请日：2004-03-30
申请人： Jfe Steel Kk , Jfeスチール株式会社 , National Institute For Materials Science , Nippon Welding Rod Kk , 日本ウエルディング・ロッド株式会社 , 独立行政法人物質・材料研究機構
发明人： NAKAMURA TERUMI , HIRAOKA KAZUO , HAYAKAWA NAOYA , SAITO TEIICHIRO , ITO TADASHI , YOSHIDA MASAYA , MORIKAGE YASUSHI , KUBO TAKAHIRO , YASUDA KOICHI
IPC分类号： B23K9/173 , B23K9/00 , B23K9/23 , B23K35/30 , B23K35/368 , B23K103/04 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To enhance crack resistance and weldability of stainless steel and also to improve fatigue strength and crack resistance in manufacturing a large structure such as a ship and a bridge by lowering martensitic transformation temperature of weld metal and reducing or eliminating residual tensile stress.
SOLUTION: In the flux cored wire in which a flux powder is filled inside a tubular metallic jacket made of stainless steel, the flux cored wire to use is designed to contain 6.5-25 mass % flux powder in the wire weight, wherein the quantity of metallic powder in the flux powder is 0.3-10 mass % in the wire weight, and wherein 3.5-15 mass % metal other than the powder in the wire weight is contained together with the flux powder inside the metallic jacket.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提高不锈钢的抗裂纹性和焊接性，并且通过降低焊接金属的马氏体相变温度并减少或消除来制造诸如船舶和桥梁等大型结构的疲劳强度和抗裂纹性，残余拉伸应力。解决方案：在焊剂粉末填充在由不锈钢制成的管状金属护套内的药芯焊丝中，使用的药芯焊丝被设计为含有6.5-25质量％的焊丝重量的助焊剂粉末，其中焊剂粉末中的金属粉末的量在线重量为0.3〜10质量％，其中除了金属丝重量以外的粉末中含有3.5-15质量％的金属以及金属护套内的焊剂粉末。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2005262258A Welding material 审中-公开
标题翻译：焊接材料
公开(公告)号：JP2005262258A
公开(公告)日：2005-09-29
申请号：JP2004077024
申请日：2004-03-17
申请人： Jfe Steel Kk , Jfeスチール株式会社 , National Institute For Materials Science , 独立行政法人物質・材料研究機構
发明人： MORIKAGE YASUSHI , YASUDA KOICHI , KUBO TAKAHIRO , HIRAOKA KAZUO , HAYAKAWA NAOYA , NAKAMURA TERUMI
IPC分类号： B23K35/30 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To provide a welding material which makes an improvement in the fatigue strength of a welded joint without the occurrence of the break of welding and an improvement in the toughness of weld metal compatible with each other.
SOLUTION: The welding material comprises a flux wire utilized for the welded joint for the steel structure manufactured by welding the low-alloy steel products. The deposited metal formed by the welding material contains ≤0.20mass% C,
摘要翻译：要解决的问题：提供一种能够提高焊接接头的疲劳强度的焊接材料，而不发生焊接断裂和提高彼此相容的焊接金属的韧性。
解决方案：焊接材料包括用于通过焊接低合金钢产品制造的钢结构焊接接头的焊剂丝。由焊接材料形成的沉积金属含有≤0.20质量％的C，<6.0质量％的Cr，≥4.0〜≤25.0质量％的Ni，≤5.0质量％的Si。 ≤10.0质量％Mn，≤0.015质量％P，≤0.007质量％S，≤3.0质量％Nb，进一步含有≤4.0质量％Mo和≤0.5质量％Ca中的至少一种，并且由余量的沉积金属铁和不可避免的杂质。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JP2005028372A Welding material and welded joint for steel structure 审中-公开
标题翻译：焊接材料和焊接接头钢结构
公开(公告)号：JP2005028372A
公开(公告)日：2005-02-03
申请号：JP2003193638
申请日：2003-07-08
申请人： Jfe Steel Kk , Jfeスチール株式会社 , National Institute For Materials Science , 独立行政法人物質・材料研究機構
发明人： MORIKAGE YASUSHI , YASUDA KOICHI , KUBO TAKAHIRO , HIRAOKA KAZUO , HAYAKAWA NAOYA , NAKAMURA TERUMI
IPC分类号： B23K9/173 , B23K9/23 , B23K35/30
摘要： PROBLEM TO BE SOLVED: To provide a welding material which improves fatigue strength of a welded joint and toughness of a weld metal compatibly without the occurrence of weld cracks.
SOLUTION: The welding material, which is used for the welded joint of a steel structure manufactured by welding a steel material, is made to a flux cored wire. The composition of a deposit metal formed with the welding material is composed of ≤0.20 mass% of C, 6.0-21.0 mass% of Cr, 4.0-20.0 mass% of Ni, ≤5.0 mass% of Si, ≤10.0 mass% of Mn, ≤0.020 mass% of P, 0.010 mass% of S, ≤4.0 mass% of Mo, ≤3.0 mass% of Nb, ≤0.5 mass% of Ca, the balance Fe and an inevitable component.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够提高焊接接头的疲劳强度和焊接金属的韧性的焊接材料，而不会发生焊缝裂纹。解决方案：将用于焊接钢材的钢结构的焊接接头所使用的焊接材料制成药芯焊丝。由焊接材料形成的沉积金属的组成由C：0.20质量％，Cr：6.0-21.0质量％，Ni：4.0〜20.0质量％，Si：5.0质量％，Mn：1.0质量％，P：0.020质量％，S：4.0质量％，Nb：3.0质量％，Ca：0.5质量％，Fe：不可避免成分。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2004025304A Weld joint and welding material for steel structure 有权
公开(公告)号：JP2004025304A
公开(公告)日：2004-01-29
申请号：JP2003073969
申请日：2003-03-18
申请人： Jfe Steel Kk , Jfeスチール株式会社 , National Institute For Materials Science , 独立行政法人物質・材料研究機構
发明人： MORIKAGE YASUSHI , YASUDA KOICHI , KUBO TAKAHIRO , AMANO KENICHI , HIRAOKA KAZUO , HAYAKAWA NAOYA
IPC分类号： B23K31/00 , B23K9/00 , B23K35/30
摘要： PROBLEM TO BE SOLVED: To provide a weld joint and a welding material for a steel structur in which improvement of fatigue strength in the weld joint and improvement of toughness in the welding metal are compatible with each other without causing weld cracks.
SOLUTION: In the weld joint for the steel structure which is manufactured by welding steel materials, the martensitic transformation starting temperature is set at not higher than 200°C and not lower than 50°C for the welding metal of the weld joint, and also the retained austenite quantity in the welding metal is made not less than 5 volume % and not more than 70 volume %.
COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2007197777A High-strength steel material superior in ductile-crack initiation resistance and fatigue-crack propagation resistance, and manufacturing method therefor 有权
标题翻译：高强度钢材料在破裂起爆电阻和疲劳裂纹扩展电阻及其制造方法中的应用
公开(公告)号：JP2007197777A
公开(公告)日：2007-08-09
申请号：JP2006018329
申请日：2006-01-27
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： SADASUE TERUKI , IKI SATOSHI , KUBO TAKAHIRO
IPC分类号： C22C38/00 , B21B1/38 , B21B3/00 , C21D8/02 , C22C38/04 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel material for a structure, which is used in various welded structures and is superior in fatigue-crack propagation resistance and ductile-crack initiation resistance even when having repeatedly received a load, and to provide a manufacturing method therefor.
SOLUTION: This steel material comprises, by mass%, 0.03-0.30% C, 0.01-0.50% Si, 0.5-2.0% Mn, 0.05% or less P, 0.02% or less S, one or more of 1.0% or less Cu, 2.0% or less Ni, 1.0% or less Cr, 1.0% or less Mo, 0.1% or less Nb, 0.1% or less V, 0.1% or less Ti and 0.005% or less B, as needed, and the balance Fe with unavoidable impurities; and has a metallographic structure that is a bainitic structure, a martensitic structure or a structure mixed thereof, which includes carbides, nitrides or carbonitrides with a maximum size of 0.5 μm or smaller in lath, and that includes ferrite with a grain size of 4 μm to 50 μm in an amount of 10% to 40% by an area fraction.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种用于各种焊接结构的结构的高强度钢材，并且即使当重复接收到负载时，也具有优异的耐疲劳裂纹扩展性和延性抗裂开始电阻，并提供其制造方法。解决方案：该钢材以质量％计含有0.03-0.30％C，0.01-0.50％Si，0.5-2.0％Mn，0.05％或更少P，0.02％或更少S，1.0％或更少的Cu，2.0％以下的Ni，1.0％以下的Cr，1.0％以下的Mo，0.1％以下的Nb，0.1％以下的V，0.1％以下的Ti，0.005％以下的B，根据需要，以及余量Fe与不可避免的杂质; 并且具有贝氏体结构，马氏体组织或其混合结构的金相组织，其包括板条中最大尺寸为0.5μm或更小的碳化物，氮化物或碳氮化物，并且包括粒径为4μm的铁素体至50μm，面积分数为10％至40％。版权所有（C）2007，JPO＆INPIT

7. 发明专利

JP2007039795A Method for producing high strength steel having excellent fatigue crack propagation resistance and toughness 审中-公开
标题翻译：生产具有优异的疲劳裂纹扩展电阻和韧性的高强度钢的方法
公开(公告)号：JP2007039795A
公开(公告)日：2007-02-15
申请号：JP2006176059
申请日：2006-06-27
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： SADASUE TERUKI , IKI SATOSHI , KUBO TAKAHIRO
IPC分类号： C21D8/02 , B21B3/00 , C22C38/00 , C22C38/04 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a steel for structural use used for various welded structures such as vessels, marine structures, bridges, construction equipment, buildings and tanks, and exhibiting satisfactory fatigue crack propagation resistance even when being subjected to a repeated load.
SOLUTION: A steel having a composition comprising, by mass, C of 0.02 to 0.25%, Si of 0.01 to 0.50%, Mn of 0.5 to 2.0%, P of ≤0.05% and S of ≤0.02% S, and, if required, comprising one or more kinds selected from Cu, Ni, Cr, Mo, Nb, V, Ti and B, and the balance Fe with inevitable impurities is heated at 900 to 1,300°C, is thereafter subjected to rolling at a cumulative draft of ≥50% at an Ar
3 point or above, is immediately subjected to accelerated cooling from an Ar
3 point or above at a cooling rate of ≥5°C/s, is subsequently subjected to cooling in the temperature range of an Ms point+200°C to an Ms point-100°C at a cooling rate of 1 point or below at a temperature rising rate of ≥1°C/s, so as to obtain a mixed microstructure essentially consisting of bainite and martensite.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于制造用于各种焊接结构如船舶，船舶结构，桥梁，施工设备，建筑物和水箱的结构用钢的方法，并且即使当经受重复加载。＆lt; P＆gt;解决方案：一种组合物，其组成包括质量分数为0.02〜0.25％的Si，0.01〜0.50％的Si，0.5〜2.0％的Mn，≤0.05％的P，≤0.02％的S，S 如果需要，包括选自Cu，Ni，Cr，Mo，Nb，V，Ti和B中的一种或多种，余量为不可避免的杂质的Fe在900至1300℃下加热，然后在在Ar 3 点以上的累积通气量≥50％，以≥5℃的冷却速度立即从Ar 3 点进行加速冷却 / s，随后在Ms点+ 200℃至Ms点-100℃的温度范围内，以<4℃/ s的冷却速度≥2秒进行冷却，然后进行加速冷却 ≤200℃，冷却速度≥5℃/秒，并且以≥1℃/ s的升温速度立即重新加热至Ac 1 点以下，因此以获得基本上由贝氏体和马氏体组成的混合微观结构。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2005240177A Method for manufacturing steel material having uniform strength in sheet thickness direction and superior fatigue-crack propagation resistance 有权
标题翻译：在厚度方向和超级疲劳裂纹扩展电阻下制造具有均匀强度的钢材的方法
公开(公告)号：JP2005240177A
公开(公告)日：2005-09-08
申请号：JP2005021547
申请日：2005-01-28
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： SADASUE TERUKI , IKI SATOSHI , KUBO TAKAHIRO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/04 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a steel material having uniform strength in a sheet thickness direction and superior fatigue-crack propagation resistance.
SOLUTION: This steel material comprises, by mass%, 0.02-0.20% C, 0.01-0.50% Si, 0.5-2.0% Mn, 0.05% or less P, 0.02% or less S, one or more among 1.0% or less Cu, 2.0% or less Ni, 1.0% or less Cr, 1.0% or less Mo, 0.1% or less Nb, 0.1% or less V, 0.1% or less Ti and 0.005% or less B, as needed, and the balance substantially Fe, while satisfying Pcm defined by the following expression so as to be 0.25 or less: Pcm = C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B, (wherein elements not to be added are considered to be zero). The method for manufacturing the steel sheet comprises heating the steel material to 1,000 to 1,300°C; then rolling it at 900°C or higher with a cumulative rolling reduction of 50% or higher; and then immediately acceleration-cooling it from an Ar3 point or higher to 650°C or lower at a cooling rate of 1/Pcm to 6/Pcm (°C/s).
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题：提供一种在板厚方向上具有均匀强度的钢材的制造方法和优异的耐疲劳裂纹扩展性。解决方案：该钢材以质量％计含有0.02-0.20％C，0.01-0.50％Si，0.5-2.0％Mn，0.05％以下P，0.02％以下S，1.0％以上，或更少的Cu，2.0％以下的Ni，1.0％以下的Cr，1.0％以下的Mo，0.1％以下的Nb，0.1％以下的V，0.1％以下的Ti，0.005％以下的B，根据需要，以及余量基本上为Fe，同时满足以下表达式所定义的Pcm为0.25以下：Pcm = C + Si / 30 +（Mn + Cu + Cr）/ 20 + Ni / 60 + Mo / 15 + V / 10 + 5B，（其中不添加的元素被认为是零）。钢板的制造方法包括将钢材加热至1000〜1300℃; 然后以900℃以上的压缩率进行轧制，累积压下率为50％以上; 然后立即以1 / Pcm至6 / Pcm（℃/ s）的冷却速度将Ar 3点以上的速度加速冷却至650℃以下。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2008137024A Welded joint having excellent fatigue strength 有权
标题翻译：焊接接头具有优异的疲劳强度
公开(公告)号：JP2008137024A
公开(公告)日：2008-06-19
申请号：JP2006323986
申请日：2006-11-30
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： ISHIGAMI ATSUSHI , KAWABATA FUMIMARU , KUBO TAKAHIRO , HANDA TSUNEHISA
IPC分类号： B23K9/23 , B23K9/02 , B23K31/00 , B23K103/04
摘要： PROBLEM TO BE SOLVED: To provide a welded joint having excellent fatigue strength equivalent to that of a flat and smooth material even if a stress concentration factor K
t at the toe of an excess metal is larger than 1.0.
SOLUTION: In an arc welding joint of structural steel, the stress concentration factor K
t at the toe of the excess metal formed on the joint is set so as to satisfy the following conditions, 1.0 t ≤1.5, and further the average hardness H
WM of the welded metal, the hardness H
B at the toe of the excess metal, and the lowest hardness H
min at a heat-affected zone are set so as to satisfy required relations.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使在过量金属的脚趾处的应力集中因子K 较大时，提供具有与平坦且平滑的材料相当的疲劳强度的优异的焊接接头比1.0。解决方案：在结构钢的电弧焊接头中，形成在接头上的过量金属的脚趾处的应力集中系数K 设定为满足以下条件：1.0 < 另外焊接金属的平均硬度H WM ，过量金属的趾部的硬度H B 并且设定热影响区域的最低硬度H min 以满足所需的关系。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2007332588A U-rib steel floor slab 有权
标题翻译： U-RIB钢地板
公开(公告)号：JP2007332588A
公开(公告)日：2007-12-27
申请号：JP2006163273
申请日：2006-06-13
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： KURIHARA YASUYUKI , KUBO TAKAHIRO , IKI SATOSHI
IPC分类号： E01D19/12
摘要： PROBLEM TO BE SOLVED: To provide a U-rib steel floor slab which is constituted by welding a U-rib to an undersurface of a deck plate, and which can accurately prevent the appearance of a deck penetrating crack penetrating the deck plate.
SOLUTION: A groove 13 with predetermined dimensions is preprovided on the side of the inner surface of the leading end of the U-rib 12a. The U-rib steel floor slab is manufactured by welding the U-rib 12a to the deck plate 11a from the outside of a closed-cross-section space which is formed of the deck plate 11a and the U-rib 12a.
COPYRIGHT: (C)2008,JPO&INPIT

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