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1. 发明专利

JP2000141045A METHOD FOR CONTROLLING BAR STEEL WELDING 失效
公开(公告)号：JP2000141045A
公开(公告)日：2000-05-23
申请号：JP31254098
申请日：1998-11-02
申请人： NIPPON STEEL CORP , OKABE CO LTD
发明人： KODAMA SHINJI , ICHIYAMA YASUTOMO , TACHIKAWA HIROSHI , WAKABAYASHI MASAKUNI , TERASAKI SHIGEKI , ERA YOSHIYUKI , OGAKI MASAYUKI , ENDO TOSHIMASA , NODA NORIO , SUZUKI MAKOTO , FURUKAWA TORU
IPC分类号： B23K9/20 , B23K9/095
摘要： PROBLEM TO BE SOLVED: To obtain a welding method having high welding quality capable of optimally controlling a position of a bar steel during the generation of an arc and a thrusting quantity after that according to individual welding states. SOLUTION: In a welding for a bar steel wherein a welding arc is generated between the bar steel and a steel plate, the bar steel and the steel plate are heated with the welding arc to partially melt them, and thereafter welding is executed by thrusting the bar steel into the steel plate, an arc voltage when the arc is generated is measured, a thrusting quantity of the bar steel is obtained from a linear expression of a measured value of the arc voltage showed as follows. d=a×V+b Here, the thrusting quantity is expressed by (d) and the arc voltage is expressed by V. Moreover, (a) and (b) are a proportional constant and preliminarily obtained prior to welding.

2. 发明专利

JP2003094180A TREATMENT METHOD FOR PILE HEAD OF STEEL PIPE PILE 审中-公开
公开(公告)号：JP2003094180A
公开(公告)日：2003-04-02
申请号：JP2001286195
申请日：2001-09-20
申请人： NIPPON STEEL CORP , OKABE CO LTD
发明人： KODAMA SHINJI , ICHIYAMA YASUTOMO , TACHIKAWA HIROSHI , ERA YOSHIYUKI , OGAKI MASAYUKI , ENDO TOSHIMASA
IPC分类号： E02D5/34 , B23K25/00 , E02D27/12
摘要： PROBLEM TO BE SOLVED: To ensure the welding quality and to improve the efficiency of welding work in a treatment method for a pile head for welding a reinforcing bar on the head of a steel pipe pile. SOLUTION: In the treatment method for the pile head of the steel pipe pile, a reinforcing bar 1 having a specified shape is preferably made to abut in the vertical direction of the outer periphery of the head of the steel pipe pile. In a state that a copper, steel or ceramic strap (preferably a heat resisting material) 5 is installed so as to surround the reinforcing bar preferably in a range of a specified conditional equation, electroslag welding is conducted from the lower end part of the reinforcing bar toward the upward.

3. 发明专利

JP2001321941A SUBMERGED ARC PRESS WELDING METHOD FOR STEEL BARS HAVING LARGE DIAMETER 失效
公开(公告)号：JP2001321941A
公开(公告)日：2001-11-20
申请号：JP2000148662
申请日：2000-05-19
申请人： NIPPON STEEL CORP , OKABE CO LTD
发明人： KODAMA SHINJI , ICHIYAMA YASUTOMO , TERASAKI SHIGEKI , WAKABAYASHI MASAKUNI , ERA YOSHIYUKI , ENDO TOSHIMASA , FURUKAWA TORU
IPC分类号： B23K9/00 , B23K9/038 , B23K9/067 , B23K9/095 , B23K103/04
摘要： PROBLEM TO BE SOLVED: To improve weld quality by preventing the fluctuation of a welding voltage and a defective arc start when starting welding, which are caused by the fluctuation of a heat input during the welding and a short circuit between molten metal at the tip of a steel bar and a molten pool on a steel plate in a welding method for the steel bar having a large diameter in a submerged arc press welding method. SOLUTION: By calculating the heat input based on a welding current and the welding voltage during the welding, and making a welding heat input constant by finishing the welding when the heat input has reached a prescribed welding heat input controlling the heights of the steel bars so that the welding voltage during the welding becomes a prescribed value and controlling the heights of the steel bars so that the welding voltage becomes a prescribed value even when fails to start the welding, an arc is made to start again.

4. 发明专利

JP2012183542A Fillet arc welding method of steel plate 审中-公开
标题翻译：钢板电弧焊接方法
公开(公告)号：JP2012183542A
公开(公告)日：2012-09-27
申请号：JP2011046256
申请日：2011-03-03
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ISHIDA KINYA , KODAMA SHINJI
IPC分类号： B23K9/02 , B23K9/00 , B23K9/23
摘要： PROBLEM TO BE SOLVED: To provide a welding method that solves a problem in which fatigue fracture strength caused by a root part is increased in a lap fillet welded joint of steel plates, and to provide a welded joint obtained by the method.SOLUTION: A lap fillet welding method of steel plates is provided in which an upper plate and a lower plate are overlapped, welding is performed so that the overlapped part integrates into a weld metal, and in which an end face of the upper plate and the surface on the side of the upper plate of the lower plate are connected through the weld metal and an end face of the lower plate and the surface on the side of the lower plate of the upper plate are connected through the weld metal. The welded joint is obtained as the result that an overlap space (overlapped length) being the length of the overlapped part of the upper plate and the lower plate in the longitudinal direction of the steel plates satisfies the following expression. -0.26×t+ 2×t-2.4 ≤ overlap space ≤ 0.1×t-1.1×t+ 4.3×t-2.7, wherein tis the plate thickness of the upper plate.
摘要翻译：要解决的问题：提供一种解决在钢板的搭接角焊接接头中由根部引起的疲劳断裂强度增加的问题的焊接方法，并提供通过该方法获得的焊接接头。解决方案：提供一种钢板的搭接圆角焊接方法，其中上板和下板重叠，进行焊接，使得重叠部分集成到焊接金属中，并且其中上部并且通过焊接金属连接下板的上板侧的表面，并且通过焊接金属将下板的端面与上板的下板侧的表面相连接。获得焊接接头，其结果是，上板和下板在钢板纵向上的重叠部分的长度的重叠空间（重叠长度）满足以下表达式。 -0.26×t 1 2 + 2×t 1 -2.4≤ 重叠空间≤0.1×t 1 3 -1.1×t 1 SP POS =“POST”> 2 + 4.3×t 1 -2.7，其中t 1 上板厚度。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2010221247A Joint of zinc-based alloy plated steel plate having excellent corrosion resistance of joined portion 审中-公开
标题翻译：具有优良耐腐蚀性能的锌基合金钢板焊接接头
公开(公告)号：JP2010221247A
公开(公告)日：2010-10-07
申请号：JP2009070518
申请日：2009-03-23
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KODAMA SHINJI , ISHIDA KINYA , HAMAYA HIDEKI
IPC分类号： B23K9/23 , B23K35/30 , B23K103/04 , B23K103/16 , C22C18/04 , C22C21/02
摘要： PROBLEM TO BE SOLVED: To provide a joint for obtaining a welding joint of zinc-based alloy plated steel plates having excellent corrosion resistance of a joined portion while securing the joining strength by solving a problem raised during the welding of the zinc-based alloy plated steel plates.
SOLUTION: In the joint of the zinc-based alloy plated steel plates, the zinc-based alloy plated steel plates wherein the Al content in the zinc-based alloy plating component is ≥6 mass%, and the plating deposit for single side is ≥50 g/m
2 are joined by using an Al-based joining material containing Si of 5-11 mass%.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种用于获得接合部分具有优异耐腐蚀性的锌基合金电镀钢板的焊接接头的接头，同时通过解决在锌 - 锌合金的焊接期间提出的问题确保接合强度，基合金镀钢板。解决方案：在锌基合金镀覆钢板的接合处，镀锌合金镀锌钢板中的锌基合金镀层组成中的Al含量为≥6质量％，镀层为单层通过使用含有5-11质量％的Si的Al基接合材料将侧面≥50g/ m 2 SP <2>连接。版权所有（C）2011，JPO＆INPIT

6. 发明专利

JP2008178910A Fillet-welded joint excellent in fatigue crack generation resistance 有权
标题翻译：焊接接头在疲劳裂纹发生电阻方面优秀
公开(公告)号：JP2008178910A
公开(公告)日：2008-08-07
申请号：JP2007330420
申请日：2007-12-21
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ISHIKAWA TADASHI , ISHIDA KINYA , OIKAWA HATSUHIKO , KASUYA TADASHI , KODAMA SHINJI
IPC分类号： B23K31/00 , B23K9/02 , B23K35/30 , B23K103/04 , C22C38/00 , C22C38/06
摘要： PROBLEM TO BE SOLVED: To provide a method for designing a joint excellent in fatigue strength, which improves fatigue crack generation property at a weld toe, and increases the fatigue life of the fillet welded joint obtained by lap fillet welding or fillet boxing welding of a sheet or a plate with a thickness of 1-20 mm.
SOLUTION: In the fillet welded joint made of a steel sheet or a plate which is excellent in fatigue crack generation resistance, when a fusion boundary FL at the weld toe is defined as a base point, the ratio of the hardness Hv(FL-0.5) of the weld metal at a position 0.5 mm apart from the base point toward the weld metal to the hardness Hv(FL+0.5) of the heat-affected zone at a position 0.5 mm apart from the base point toward the heat-affected zone is 0.3 or more and 0.9 or less.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种设计疲劳强度优异的接头的方法，其提高焊接脚趾处的疲劳裂纹产生性，并且通过搭接圆角焊接或圆角拼装获得的角焊接头的疲劳寿命增加焊接厚度为1-20mm的片材或板材。解决方案：在以耐疲劳裂纹产生电阻优异的钢板或板材制成的角焊接头中，当焊接趾部的熔融边界FL被定义为基点时，硬度Hv（ FL-0.5）在从基点朝向焊接金属0.5mm的位置处到热影响区的距离基点向着热的位置0.5mm的位置处的硬度Hv（FL + 0.5）受影响区域为0.3以上且0.9以下。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2005028392A Welded joint of galvannealed steel plate 审中-公开
标题翻译：焊接钢筋焊接接头
公开(公告)号：JP2005028392A
公开(公告)日：2005-02-03
申请号：JP2003194417
申请日：2003-07-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KODAMA SHINJI , MIYAZAKI YASUNOBU , MIYASAKA AKIHIRO , YAMAOKA IKURO , HAMAYA HIDEKI , MIZUHASHI NOBUO , HARA TAKUYA
IPC分类号： B23K35/30 , C22C38/00 , C22C38/16
摘要： PROBLEM TO BE SOLVED: To provide an excellent welded joint of a galvannealed steel plate capable of suppressing occurrence of zinc embrittlement crack in weld metal when welding the galvannealed steel plate used in a welding structural member.
SOLUTION: In the welded joint of a galvannealed steel plate comprising a steel plate with a zinc alloy plating layer provided on a face side thereof and a welded part, the weld metal to constitute the welded part contains, by mass, 0.01-0.15% C, 0.05-1.5% Si, 0.2-2.0% Mn, ≤ 0.03% P, ≤ 0.015% S, 5-60 ppm B, and 0.002-0.2% Ti while the area ratio of ferrite (pro-eutectoid ferrite) transformed from austenitic grain boundary is ≤ 12%, and the balance Fe with inevitable impurities.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种在焊接焊接结构构件中使用的合金化热镀锌钢板时能够抑制焊接金属中的锌脆化裂纹发生的合金化热浸镀锌钢板的优良的焊接接头。解决方案：在包括其表面上设置有锌合金镀层的钢板和焊接部的合金化热镀锌钢板的焊接接头中，构成焊接部的焊接金属质量含有0.01〜 0.15％C，0.05-1.5％Si，0.2-2.0％Mn，≤0.03％P，≤0.015％S，5-60ppm B和0.002-0.2％Ti，而铁素体（共析共析铁素体）从奥氏体晶界转变为≤12％，余量为Fe与不可避免的杂质。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2005028388A Lap laser welding method of galvanized steel sheet with less weld defect 审中-公开
标题翻译：具有较弱焊接缺陷的钢化钢板的拉链激光焊接方法
公开(公告)号：JP2005028388A
公开(公告)日：2005-02-03
申请号：JP2003194316
申请日：2003-07-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KODAMA SHINJI , MIYAZAKI YASUNOBU , MIYASAKA AKIHIRO , YAMAOKA IKURO
IPC分类号： B23K26/00 , B23K26/20 , B23K26/32 , B23K35/368 , B23K103/04 , B23K103/16
摘要： PROBLEM TO BE SOLVED: To provide a lap laser welding method of galvanized steel sheets used for outside sheets of a car capable of suppressing explosion of molten metal caused by galvanizing vapor when welding the outside sheets of the car and generation of weld defects attributable thereto. SOLUTION: In the lap laser welding method of galvanized steel sheets with less weld defects for welding lapped parts of the galvanized steel sheets by using laser beams, welding is performed while feeding a filler wire in which oxides are contained in the wire and the filling ratio of the oxides is over 3% to 15%, and any one of the oxide out of iron oxide, tin oxide, copper oxide and bismuth oxide is preferably used for the oxide. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于汽车外部片材的镀锌钢板的搭接激光焊接方法，其能够在焊接汽车的外部片材时产生的镀锌蒸气引起的熔融金属的爆炸产生并产生焊接缺陷归因于此。
解决方案：在使用激光束焊接镀锌钢板的焊接部件的焊接缺陷较小的镀锌钢板的搭接激光焊接方法中，在供给在电线中含有氧化物的填充焊丝的同时进行焊接，氧化物的填充率为3％〜15％，优选氧化铁，氧化锡，氧化铜和氧化铋中的氧化物中的任一种为氧化物。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2004238722A High-strength steel strip excellent in plasma weldability and formability 审中-公开
标题翻译：高强度钢条在等离子体焊接性和可塑性方面优秀
公开(公告)号：JP2004238722A
公开(公告)日：2004-08-26
申请号：JP2003031903
申请日：2003-02-10
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HAJI JUNJI , ICHIYAMA YASUTOMO , KODAMA SHINJI , KAWASAKI KAORU , SAWAI TAKASHI
IPC分类号： B23K10/02 , B21D22/02 , C22C38/00 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel strip which is used for automobiles, industrial machines, etc., can be stably welded by plasma welding without causing burn through or high-temperature cracking even at a high welding rate, and is excellent in formability, such as hole-enlarging property or ductility.
SOLUTION: The high-strength steel strip excellent in plasma weldability and formability contains 0.05-0.10 mass% C, 0.5-2.0 mass% Mn, at most 0.02 mass% P, 0.0015-0.004 mass% S, 0.005-0.1 mass% Al, at most 0.005 mass% N, X to (1.2-X) mass% Si [wherein X=1.75×(10,000×S amount)
-1/2 ], and the balance being iron and unavoidable impurities. The steel strip has a structure comprising at least 90% polygonal ferrite and the balance being a rigid phase such as pearlite or bainitic ferrite and has a hole-enlarging ratio of 80% or higher.
COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：为了提供用于汽车，工业机械等的高强度钢带，可以通过等离子焊接稳定地焊接，而不会在高焊接速率下引起燃烧或高温裂纹，成型性优异，例如扩孔性，延展性。解决方案：等离子焊接性和成形性优异的高强度钢带含有0.05-0.10质量％的C，0.5-2.0质量％的Mn，至多0.02质量％的P，0.0015-0.004质量％的S，0.005-0.1质量％％Al，至多0.005质量％N，X至（1.2-X）质量％Si [其中X = 1.75×（10,000×S量） -1/2 ]，余量为铁和不可避免的杂质。钢带具有包括至少90％的多边形铁素体，余量为刚性相的结构，例如珠光体或贝氏体铁素体，并且具有80％以上的扩孔率。版权所有（C）2004，JPO＆NCIPI

10. 发明专利

JP2003311433A Method for evaluating liquid metal embrittlement crack during seam welding of galvanized steel sheet 审中-公开
标题翻译：钢板焊缝焊接液体金属破裂裂纹的方法
公开(公告)号：JP2003311433A
公开(公告)日：2003-11-05
申请号：JP2002113984
申请日：2002-04-16
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HAMAYA HIDEKI , KODAMA SHINJI , MIYAZAKI YASUNOBU , MIZUHASHI NOBUO
IPC分类号： B23K13/01 , B23K13/00
摘要： PROBLEM TO BE SOLVED: To provide a method which can quantify the liquid metal embrittleness crack during seam welding of galvanized steel sheets, such as seam welding of a steel tube using the galvanized steel sheets by a simple method and can evaluate the liquid metal embrittleness crackability of steel products.
SOLUTION: The method for evaluating the liquid metal embrittleness crack during seam welding of the galvanized steel sheets comprises butting the galvanized steel sheets having galvanizing layers on either or both surfaces against each other, then exerting an upset to the butt zone and welding the same under electrical heating, air cooling the steel sheets after the end of the electric heating, loading the butt zone with a tensile stress of ≥20 to ≤80% of the tensile strength of the steel sheets at a temperature of a weld HAZ zone above the melting point of the galvanizing layers and below the Ar
3 transformation point of the steel sheets, then measuring the thickness of the embrittleness layer in the weld HAZ zone and evaluating the liquid metal embrittleness crack during seam welding of the galvanized steel sheets in accordance with the ratio of the embrittleness layer thickness to the sheet-metal gage of the steel sheets.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种能够定量镀锌钢板的缝焊过程中的液态金属脆性裂纹的方法，例如通过简单的方法使用镀锌钢板的钢管的缝焊，并且可以评估液体钢铁产品的金属脆性破裂性。解决方案：用于评价镀锌钢板的缝焊过程中的液态金属脆性裂纹的方法包括将两面或两面具有镀锌层的镀锌钢板彼此对接，然后对对接区施加镦锻并焊接在电加热的同时，在电加热结束后对钢板进行空气冷却，在焊接HAZ区的温度下，将钢板的拉伸强度为≥20〜≤80％的拉伸应力加载到对接区在镀锌层的熔点以上，低于钢板的Ar 3 相变点，然后测量焊缝HAZ区的脆性层的厚度，并评估缝焊过程中的液态金属脆性裂纹的镀锌钢板根据脆性层厚度与钢板的金属板的比例。版权所有（C）2004，JPO

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