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11. 发明专利

JP2004090051A Flux for submerged arc welding of low alloy steel excellent in resistance to sulfuric acid and hydrochloric acid, and submerged arc welding process 有权
标题翻译：用于耐硫酸和氢氯酸的低合金钢的浸渍弧焊和浸没式焊接工艺
公开(公告)号：JP2004090051A
公开(公告)日：2004-03-25
申请号：JP2002255745
申请日：2002-08-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KOJIMA KAZUHIRO , OKITA SHIGERU , USAMI AKIRA , UMEKI MASAO , SASAKI MASAHITO , KURAMATA SATORU
IPC分类号： B23K9/18 , B23K9/23 , B23K35/362
摘要： PROBLEM TO BE SOLVED: To provide flux for submerged arc welding by which a weld metal excellent in resistance to sulfuric acid and hydrochloric acid is obtained, and to provide a submerged arc welding process.
SOLUTION: Fusible flux for the submerged arc welding of a low alloy steel excellent in resistance to sulfuric acid and hydrochloric acid, contains Sb of 0.01 to 1.5 %, SiO
2 of 0.1 to 50 %, Al
2 O
3 of 0.1 to 50 %, and MgO of 0.1 to 50 %, by mass % to the whole mass of the flux.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供用于浸没电弧焊接的焊剂，通过该焊剂获得耐硫酸和盐酸耐受性优异的焊接金属，并提供埋弧焊接工艺。
解决方案：耐硫酸和盐酸耐腐蚀性好的低合金钢的埋弧焊可熔焊剂含有0.01〜1.5％的Sb，0.1〜50％的SiO 2 2 3 为0.1〜50％，MgO为0.1〜50质量％。版权所有（C）2004，JPO

12. 发明专利

JPH08103824A WIRE HEATING METHOD SUPERIOR IN BENDING WORKABILITY 失效
公开(公告)号：JPH08103824A
公开(公告)日：1996-04-23
申请号：JP20113995
申请日：1995-08-07
申请人： NIPPON STEEL CORP
发明人： KASUYA TADASHI , KOJIMA KAZUHIRO , HORII YUKIHIKO
IPC分类号： C21D8/02 , B21D11/20 , C22C38/00 , C22C38/12 , C22C38/52 , C22C38/54
摘要： PURPOSE: To provide a wire heating method that 15 superior in bending workability with a steel sheet heated. CONSTITUTION: The ratio of the yield strength of a steel at a certain temp. to that of a steel at a room temp. is controlled within a prescribed range; in addition, as a wire heating method, the highest attainable temp. is set from 600 to 1,100 deg.C; and then, water cooling is commenced immediately after or at 400 deg.C or above and stopped within the range of 200 deg.C or below to the room temp.

13. 发明专利

JP2012011400A Method for manufacturing welding joint and welding device for executing the same 有权
标题翻译：用于制造焊接接头和用于执行其的焊接装置的方法
公开(公告)号：JP2012011400A
公开(公告)日：2012-01-19
申请号：JP2010147765
申请日：2010-06-29
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KOJIMA KAZUHIRO , NOSE TETSUO , INOUE HIROSHIGE
IPC分类号： B23K9/173 , B23K9/00 , B23K9/095 , B23K9/12 , B23K103/04
摘要： PROBLEM TO BE SOLVED: To obtain a highly tough welding joint by carrying out welding so as not to allow a heat input amount to fluctuate even when a groove sectional area fluctuates when manufacturing the welding joint formed of a thick steel plate with a plate thickness of >50 mm using two electrode vertical electrogas arc welding.SOLUTION: A truck mounted with two welding torches is moved upward with constant speed along a groove of a steel plate to be welded, a welding voltage is controlled so as to become constant, wire feeding speed is changed corresponding to change of a welding current to control the welding current so as to become constant, and the welding joint is manufactured through the dual electrode vertical electrogas arc welding by allowing heat input during welding to be constant.
摘要翻译：要解决的问题：为了通过进行焊接来获得高韧性的焊接接头，以便即使当制造由厚钢板形成的焊接接头时，即使在槽截面积波动时也不允许热输入量波动，板厚> 50mm，采用双电极立式电焊气电弧焊。解决方案：用两个焊炬安装的卡车沿着要焊接的钢板的槽以恒定的速度向上移动，焊接电压被控制为恒定，焊丝进给速度根据变化而变化焊接电流以控制焊接电流变得恒定，并且通过允许焊接期间的热输入恒定，通过双电极垂直电弧电弧焊制造焊接接头。版权所有（C）2012，JPO＆INPIT

14. 发明专利

JP2011255385A Flux-cored wire for carbon dioxide gas-shielded arc welding for high-tensile steel 有权
标题翻译：二氧化碳气体保护焊丝用于高强度钢的焊丝
公开(公告)号：JP2011255385A
公开(公告)日：2011-12-22
申请号：JP2010129231
申请日：2010-06-04
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： NAKAMURA SHUICHI , KOJIMA KAZUHIRO , TOTSUKA YASUJI , SHIMURA RYUICHI
IPC分类号： B23K35/368 , B23K35/30
摘要： PROBLEM TO BE SOLVED: To provide a flux-cored wire for carbon dioxide gas-shielded arc welding for a high-tensile steel, used for welding a high-tensile steel having ≥690 MPa of strength using 100% carbon dioxide gas as a shielding gas, obtaining superior welding workability and obtaining a weld metal having excellent mechanical capability.SOLUTION: The wire contains, by mass% to the total mass of the wire, 0.03-0.10% C, 0.1-0.4% Si, 2.0-4.0% Mn, 1.0-3.5% Ni, 0.06-1.5% Al, 0.10-1.00% Mo, contains one or more kinds of 0.1-1.0% Cr, 0.01-0.05% Nb and 0.01-0.05 V, and contains 2.5-7.5% TiO, 0.1-0.5% SiO, 0.2-0.9% ZrO, 0.1-0.4% AlOand 0.01-0.4% one or more kinds of fluorine compound in total in terms of F value. In the wire, the total hydrogen amount of the wire is ≤15 ppm by mass ratio to the entire wire.
摘要翻译：要解决的问题：为了提供用于高张力钢的二氧化碳气体保护电弧焊的药芯焊丝，用于使用100％二氧化碳气体焊接具有≥690MPa强度的高强度钢作为保护气体，获得优异的焊接加工性，并获得具有优异的机械性能的焊接金属。解决方案：电线的质量％以质量％计含有0.03-0.10％C，0.1-0.4％Si，2.0-4.0％Mn，1.0-3.5％Ni，0.06-1.5％Al， 0.10-1.00％Mo，含有0.1-1.0％的Cr，0.01-0.05％的Nb和0.01-0.05V的一种或多种，并含有2.5-7.5％的TiO 2 SB SB =“POST”> 2 0.1-0.5％SiO 2 ，0.2-0.9％ZrO 2 ，0.1-0.4％Al 2 O 3 和0.01-0.4％的氟化合物总计为F值。在导线中，导线的总氢量相对于整个导线的质量比为≤15ppm。版权所有（C）2012，JPO＆INPIT

15. 发明专利

JP2011140052A Flux-cored wire for gas-shielded welding 有权
标题翻译：用于气体焊接焊接的通丝线
公开(公告)号：JP2011140052A
公开(公告)日：2011-07-21
申请号：JP2010002847
申请日：2010-01-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KOJIMA KAZUHIRO , SHIMURA RYUICHI , SASAKI MASAHITO
IPC分类号： B23K35/02
摘要： PROBLEM TO BE SOLVED: To provide a flux-cored welding wire having excellent welding workability.
SOLUTION: In the flux-cored wire for gas-shielded welding, a spiral steel wire 3 is inserted in a tubular steel-made outer pipe 2, and flux 4 is filled therein, the spiral steel wire 3 is directly brought into contact with an inner surface 2c of the steel-made outer pipe 2, the total cross sectional area of the spiral steel wire 3 at an optional cross section of the wire is 10-40% of the cross sectional area inside the steel-made outer pipe 2, and the pitch of the spiral steel wire 3 is in a range of 15 to 50 mm.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供具有优异的焊接加工性的药芯焊丝。
解决方案：在用于气体保护焊的药芯焊丝中，螺旋钢丝3插入管状钢制外管2中，并且将焊剂4填充在其中，螺旋钢丝3直接进入与钢制外管2的内表面2c接触时，线材的任意横截面处的螺旋状钢丝3的总截面积为钢制外侧的截面积的10〜40％管2，螺旋状钢丝3的间距为15〜50mm的范围。版权所有（C）2011，JPO＆INPIT

16. 发明专利

JP2004337930A Method for submerged-arc-welding steel for crude oil tank 有权
公开(公告)号：JP2004337930A
公开(公告)日：2004-12-02
申请号：JP2003138059
申请日：2003-05-16
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KOJIMA KAZUHIRO , OKITA SHIGERU , USAMI AKIRA , HASEGAWA TOSHINAGA
IPC分类号： B23K9/18 , B23K9/23 , B23K35/30 , B23K103/04
摘要： PROBLEM TO BE SOLVED: To provide a method for submerged-arc-welding steel for a crude oil tank, which imparts almost equally excellent corrosion resistance to the entire crude oil tank including weld joints, in an oil corrosion environment in crude oil tanks for transporting or storing crude oil, such as oil tanks of an oil tanker constructed by welding, and oil tanks on or under the ground.
SOLUTION: In the method for submerged-arc-welding steel for a crude oil tank, a steel to be welded includes, in mass%, 0.01-1.5% Cu and 0.01-0.5% Mo. A welding wire to be used is plated with 0.3-30 μm thick Cu and includes, in mass% based on the total mass, 0.001-0.2% C, 0.01-1.0% Si, 0.1-2.5% Mn and 0.01-1.0% Cu including Cu on the plated surface. Welding is performed within the range of a heat input of ≥3kJ/mm and ≤30kJ/mm by using at least either one of the wire or a bonded flux including 0.01-1.0% Mo in mass%.
COPYRIGHT: (C)2005,JPO&NCIPI

17. 发明专利

JP2001279324A METHOD FOR PRODUCING STEEL FOR LASER WELDING 失效
公开(公告)号：JP2001279324A
公开(公告)日：2001-10-10
申请号：JP2000089218
申请日：2000-03-28
申请人： NIPPON STEEL CORP
发明人： KOJIMA KAZUHIRO , OKITA SHIGERU , FUJI MASAO , AIHARA SHUJI , HOSHINO MANABU , SAITO NAOKI , TSUZUKI TAKESHI
IPC分类号： B21B3/00 , B21B45/08 , C21D8/00 , C21D8/10 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a steel excellent in laser weldability even without removing scale. SOLUTION: In this method for producing a steel for laser welding having a composition containing, by mass, 0.01 to 0.20% C, 0.01 to 1.5% Si, 0.2 to 2.0% Mn, =5 MPa at hot rolling is performed on at least either side of the inlet side or the outlet side of a rolling mill, at least one time. Furthermore, one or more selected from Nb, V, Mo, Cu, Ni, Cr and B are preferably incorporated therein.

18. 发明专利

JP2000071092A MAGNESIUM CONTAINED WELDING METAL WITH EXCELLENT LOW TEMPERATURE TOUGHNESS 失效
公开(公告)号：JP2000071092A
公开(公告)日：2000-03-07
申请号：JP24282498
申请日：1998-08-28
申请人： NIPPON STEEL CORP
发明人： KOJIMA KAZUHIRO , OKITA SHIGERU , FUJI MASAO
IPC分类号： B23K9/18 , B23K9/23 , B23K35/30 , C22C38/00 , C22C38/06 , C22C38/16
摘要： PROBLEM TO BE SOLVED: To provide a welding metal for stably obtaining high toughness even if Al additive volume varies. SOLUTION: This welding metal contains, at wt.%, 0.01-0.3% C, 0.01-1.0% Si, 0.1-3.0% Mn, 0.001-0.1% Al, 0.0002-0.02% B, 0.0002-0.1% Mg, 0.001-0.1% O, and the balance of Fe and inevitable impurities, where the Mg/O ratio is 0.01-0.9. Additionally, it is preferable that the metal contains one or more kinds of 3.0% or less Cu, 7.0% or less Ni, 2.0% or less Mo, and 1.0% or less Ti.

19. 发明专利

JPH11267846A MOLTEN ZINC SYSTEM PLATED STEEL PLATE WELDING 失效
公开(公告)号：JPH11267846A
公开(公告)日：1999-10-05
申请号：JP7228398
申请日：1998-03-20
申请人： NIPPON STEEL CORP , IDEMITSU KOSAN CO , IDEMITSU ENG KK
发明人： YAMANE KUNIHIDE , KOJIMA KAZUHIRO , NIIGASHIRA HIDETOSHI , YASHIKI TAKASHI , ISHIMOTO HIROYASU
IPC分类号： B23K9/23 , B23K9/14 , B23K35/365
摘要： PROBLEM TO BE SOLVED: To provide a welding method wherein a welding is carried out with a coated arc welding bar, with which a pit or a blow hole is hard to be generated, in a way that the zinc plating is not damaged even at a vicinity of a weld heat affecting part at the welding of a molten zinc plated steel plate to be applied as a roofing material of an oil storage tank and the like. SOLUTION: In a method to arc-weld the molten zinc plated system steel plate, zinc plate adhesion volume of which per face is 60-400 g/m , an adding volume of a carbon being contented in a coating agent is controlled at 0.02-0.50 wt.% against the total coating agent, and a welding heat input is adjusted so as to be 0.5-1.5 kJ/mm to carry out the welding, and content of TiO2 , SiO2 , CaCO2 , Fe-Mn, steel powder is limited.

20. 发明专利

JPH0966374A ELECTROSLAG WELDING METHOD FOR HIGH TENSION STEEL 失效
公开(公告)号：JPH0966374A
公开(公告)日：1997-03-11
申请号：JP24390395
申请日：1995-08-30
申请人： NIPPON STEEL CORP
发明人： OKITA SHIGERU , KOYAMA KUNIO , FUJI MASAO , KOJIMA KAZUHIRO , KASUYA TADASHI
IPC分类号： B23K25/00 , B23K9/00 , B23K35/30 , C22C38/00 , C22C38/04
摘要： PROBLEM TO BE SOLVED: To prevent cracks generated from a contact point between a high tension steel and a welding metal in an electroslag welding for the high tension steel having a different tensile strength respectively. SOLUTION: The electroslag welding is performed to two steel plates having a different tensile strength, one of which has the tensile strength of >=570MPa, so that the tensile strength of the welding metal becomes >=0.9 times the tensil strength of the steel having higher tensile strength. A welding wire which contains 0.04-0.13% C, 0.05-0.9% Si and 1.0-2.2 Mn is preferably used. Also, the steel plates to be welded, one or both of which have the tensile strength of >=570MPa, are welded by the use of the welding wire which preferably contains 0.04-0.13% C, 0.05-0.9% Si, 1.0-2.2% Mn and 0.0007-0.0035% B so that the amount of B contained in the welding metal becomes 4-20ppm based on the solid wire specified in JISZ3312 (1989).

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