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91. 发明专利

JPS6415320A PRODUCTION OF HIGH TENSILE STEEL FOR LOW TEMPERATURE USE HAVING EXCELLENT TOUGHNESS OF WELD ZONE 失效
公开(公告)号：JPS6415320A
公开(公告)日：1989-01-19
申请号：JP16857687
申请日：1987-07-08
申请人： NIPPON STEEL CORP
发明人： CHIJIIWA RIKIO , TERADA YOSHIO , TAMEHIRO HIROSHI , HIRAI MASAZUMI , ISODA SEIJI
IPC分类号： B22D11/00 , C21D6/00 , C21D8/02 , C22C33/00 , C22C38/00 , C22C38/54 , C22C38/58
摘要： PURPOSE:To produce a steel having excellent low-temperature toughness over the entire region in a weld heat-affected zone by subjecting a continuously cast slab of an extremely low S high tensile steel added with a slight amt. of Ca to reheating at a specific temp. CONSTITUTION:The steel contg., by weight %, 0.01-0.15% C, =1 Kinds among 0.005-0.060% Nb, 0.005-0.025% Ti, 0.005-0.025% Zr, 0.005-0.060% V, 0.05-2.0% Ni, 0.05-1.0% Cu, 0.05-1.0% Cr, 0.05-0.40% Mo, 0.0003-0.0020% B, and 0.005-0.05% REM are incorporated at need into the compsn. of this steel. This steel has excellent hydrogen induced cracking resistance.

92. 发明专利

JPS63286517A MANUFACTURE OF HIGH-TENSILE STEEL WITH LOW YIELDING RATIO 失效
公开(公告)号：JPS63286517A
公开(公告)日：1988-11-24
申请号：JP12219487
申请日：1987-05-19
申请人： NIPPON STEEL CORP
发明人： TERADA YOSHIO , CHIJIIWA RIKIO , TAMEHIRO HIROSHI
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/06 , C22C38/14 , C22C38/54 , C22C38/58
摘要： PURPOSE:To manufacture a steel combining low yielding ratio with high tensile strength, by hot-rolling a steel having a specific composition containing Mn and Al under specific conditions, by air-cooling the hot-rolled plate until a temp. where proper amounts of ferrite are precipitated is reached, and by successively applying quench-and-temper treatment to the above. CONSTITUTION:A steel slab consisting of, by weight, 0.01-0.20% C, =30% and Ar3+80 deg.C-Ar3-20 deg.C, respectively, and austenite grains are refined. Successively, air cooling is applied until a temp. of Ar3-20 deg.C-Ar3-100 deg.C is reached, followed by cooling down to =2 deg.C/sec cooling rate. Then, tempering treatment is applied at a temp. of the Ac1 point or above to form the structure into ferrite=bainite=martensite. Moreover, Ni, Mo, Cu, Cr, V, Nb, Ti, B, Ca, and REM are incorporated by specific amounts or below to the above steel composition, if necessary.

93. 发明专利

JP2010209460A High-strength steel sheet and high-strength steel pipe having excellent hydrogen-induced cracking resistance for use in line pipe 有权
标题翻译：高强度钢板和高强度钢管，具有优异的氢诱导抗裂性，适用于管线管
公开(公告)号：JP2010209460A
公开(公告)日：2010-09-24
申请号：JP2009253147
申请日：2009-11-04
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HARA TAKUYA , TERADA YOSHIO , MURAKI TARO , SUZUKI TAKESHI
IPC分类号： C22C38/00 , C22C38/14 , C22C38/58
CPC分类号： C22C38/04
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet and a steel pipe having excellent HIC resistance that are ideal for, for instance, a line pipe used to convey petroleum or natural gas.
SOLUTION: The steel sheet and the steel pipe are formed from steel having a steel composition that comprises C: 0.02 to 0.08%, Si: 0.01 to 0.5%, Mn: 1.2 to 1.6%, Nb: 0.001 to 0.10%, Ca: 0.0001 to 0.0050%, N: 0.0010 to 0.0050%, and O: 0.0001 to 0.0030%, P: 0.01% or less, S: 0.0020% or less, Al: 0.030% or less, and Ti: 0.030% or less and that satisfies S/Ca
摘要翻译：要解决的问题：提供对于例如用于输送石油或天然气的管线管是理想的钢板和具有优异的耐HIC电阻的钢管。钢板和钢管由具有C：0.02〜0.08％，Si：0.01〜0.5％，Mn：1.2〜1.6％，Nb：0.001〜0.10％的钢组成的钢形成， Ca：0.0001〜0.0050％，N：0.0010〜0.0050％，O：0.0001〜0.0030％，P：0.01％以下，S：0.0020％以下，Al：0.030％以下，Ti：0.030％以下并且满足S / Ca <0.5，发生中心偏析的部分的未受压部分的长度限制在0.1mm以下。版权所有（C）2010，JPO＆INPIT

94. 发明专利

JP2009249676A Steel pipe having excellent workability and method for producing the same 有权
标题翻译：具有优异的可操作性的钢管和用于生产它的方法
公开(公告)号：JP2009249676A
公开(公告)日：2009-10-29
申请号：JP2008098105
申请日：2008-04-04
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO
IPC分类号： C22C38/00 , B21C1/00 , C21D8/10 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a steel pipe having excellent workability, which has satisfactory shape and surface properties, has excellent workability including a weld zone and is suitably usable for a steel pipe for structures purpose, piping or the like formed by tube drawing, bending, hydroforming or the like, and to provide a method for producing the same.
SOLUTION: The steel pipe contains steel components each controlled within a prescribed range, and the metallic structure in the whole region of the steel pipe including a seam weld zone has a composite structure composed of ferrite and either or both of martensite and bainite, wherein the X-ray reflective face random strength ratio of the {111} face of the sheet face in the 1/2 thickness of the steel pipe other than the seam weld zone lies in the range of 2.0 to 7.0, the X-ray reflective face random strength ratio of the {110} face lies in the range of 1.0 to 5.0, and the X-ray reflective face random strength ratio of the {100} face is ≤3.0.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：待解决的问题：为了提供具有良好的形状和表面性能的具有优异的加工性的钢管，具有包括焊接区域的优异的可加工性，并且适用于由结构目的，管道等形成的钢管，由管拉伸，弯曲，液压成形等，并提供其制造方法。钢管含有各自控制在规定范围内的钢构件，并且包括焊缝区域的钢管的整个区域中的金属结构具有由铁素体和马氏体和贝氏体中的任一种或两者组成的复合结构其特征在于，除了缝焊区域以外的钢管的1/2厚度的板面的ä111面的X射线反射面随机强度比在2.0〜7.0的范围内，X射线反射 ä110}面的面随机强度比在1.0〜5.0的范围内，ä100}面的X射线反射面随机强度比≤3.0。版权所有（C）2010，JPO＆INPIT

95. 发明专利

JP2009197472A Steel pipe pile and foundation structure 审中-公开
标题翻译：钢管和基础结构
公开(公告)号：JP2009197472A
公开(公告)日：2009-09-03
申请号：JP2008039909
申请日：2008-02-21
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YANAGI ETSUTAKA , UEDA SOICHI , TATSUTA MASATAKE , TERADA YOSHIO , TOYOSHIMA KEI
IPC分类号： E02D5/28
摘要： PROBLEM TO BE SOLVED: To provide a steel pipe pile capable of eliminating reinforcing operations at sites and having a sufficient strength against a load and a bending moment applied from a building thereto.
SOLUTION: In this steel pipe pile 1, a pile head section at the upper end is inserted into a footing 11. By a heat treatment, the strength of the upper section of the steel pipe pile 1 is 1.2 to 3.0 times that of the other sections. Since the upper section of the steel pipe pile 1 including the pile head section is reinforced beforehand, additional reinforcing operations at site such as the excavation of a ground and the washing of the steel pipe pile which have been required for reinforcing the pile head section 1 can be eliminated.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种钢管桩，能够消除现场的加固作业，并且对建筑物施加的负荷和弯矩具有足够的强度。解决方案：在该钢管桩1中，将上端的桩头部分插入底脚11.通过热处理，钢管桩1的上部的强度为钢管桩1的上部的强度的1.2〜3.0倍，的其他部分。由于预先加固包括桩头部的钢管桩1的上部，所以在加强桩头部1所需的地面挖掘，钢管桩等场所的附加加固作业可以消除。版权所有（C）2009，JPO＆INPIT

96. 发明专利

JP2008119710A Method for manufacturing high-strength welded steel tube 有权
标题翻译：制造高强度焊接钢管的方法
公开(公告)号：JP2008119710A
公开(公告)日：2008-05-29
申请号：JP2006304552
申请日：2006-11-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI , AGATA ATSUSHI , YOSHIDA TATSUYA , SUZUKI TAKESHI , TERASAWA TAKASHI , HATTORI YUTAKA , TERADA YOSHIO
IPC分类号： B21C37/08 , B21D5/01
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-strength welded steel tube, which, when manufacturing a welded steel tube using a UOE process, prevents buckling, does not generate a crack from a weld part, such as a toe crack and an expanding crack, and does not cause tack-welding failure of the weld part.
SOLUTION: In manufacturing a welded steel tube, the end parts of a steel plate is bent with a pressing force w(N/mm) of an upper die, which is determined by A≤w≤B or A×C≤w≤B/D, while satisfying the following formulae 0.15≤R
1 /D≤0.25 and 135≤u≤160, wherein, R
1 (mm) is the radius of curvature of the working face of an upper die, u(mm) is the distance in the horizontal direction from the center of curvature of the upper die to the end part of the steel plate, s(MPa) is the tensile strength of the steel plate, D(mm) is the outer diameter of the welded tube to be manufactured, A and B are the values determined by s, and C and D are the values determined by s and u.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种制造高强度焊接钢管的方法，当使用UOE工艺制造焊接钢管防止弯曲时，不会从焊接部分产生裂纹，例如趾裂和扩张裂纹，不会引起焊接部位的焊接失效。
解决方案：在制造焊接钢管时，钢板的端部以上模的压力w（N / mm）弯曲，由A≤w≤B或A×C≤ w≤B/ D，同时满足下列公式：0.15≤R 1 /D≤0.25和135≤u≤160，其中，R SB =（1 / 上模的工作面的曲率，u（mm）是从上模的曲率中心到钢板的端部的水平方向的距离，s（MPa）是钢板的拉伸强度钢板，D（mm）是要制造的焊接管的外径，A和B是由s确定的值，C和D是由s和u确定的值。版权所有（C）2008，JPO＆INPIT

97. 发明专利

JP2007246933A High strength steel pipe with excellent weld zone toughness, and its manufacturing method 有权
标题翻译：具有优异焊接区韧性的高强度钢管及其制造方法
公开(公告)号：JP2007246933A
公开(公告)日：2007-09-27
申请号：JP2006067626
申请日：2006-03-13
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TERADA YOSHIO , DOI NAOKI
IPC分类号： C22C38/00 , B23K35/30 , C21D9/08 , C21D9/50 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel pipe which has a high strength of X80 to X100 grades specified in American Petroleum Institute (API) Standard and has excellent weld zone toughness even at a very low temperature of -60°C and also to provide its manufacturing method.
SOLUTION: The steel pipe is constituted in such a way that: the amounts of alloying elements added to a base material and a weld metal zone of the steel pipe are specified to values in proper ranges, respectively; the amount of (Nb+V) in the weld metal zone is specified to a value in a proper range; and, in the weld metal zone and in a weld heat-affected zone within a range from fusion line to a position of 5 mm, the volume fraction of a mixture (M-A constituent) of martensite and austenite is made to
摘要翻译：要解决的问题：提供一种具有高美国石油协会（API）标准规定的X80至X100等级高强度的高强度钢管，即使在-60°F的非常低的温度下也具有优异的焊接区韧性并提供其制造方法。解决方案：钢管的构成如下：将添加到基材的合金元素量和钢管的焊接金属区域的数量分别规定为适当范围的值; 将焊接金属区域中的（Nb + V）量规定为适当范围的值; 在熔融金属区域和焊接热影响区域内，从熔融线到5mm的位置，将马氏体和奥氏体的混合物（M-A成分）的体积分数设为<1％。版权所有（C）2007，JPO＆INPIT

98. 发明专利

JP2007044710A Method for manufacturing uo-formed steel pipe having excellent low temperature cracking resistance, and uo-formed steel pipe 有权
标题翻译：用于制造具有优异的低温耐开裂性的U型成型钢管和U型成型钢管的方法
公开(公告)号：JP2007044710A
公开(公告)日：2007-02-22
申请号：JP2005229695
申请日：2005-08-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MORIMOTO YUTAKA , TSURU EIJI , OKITA SHIGERU , ASAHI HITOSHI , HARA TAKUYA , TERADA YOSHIO , YOSHIDA TATSUYA , SHINADA KOICHI
IPC分类号： B21C37/08 , B23K9/23 , B23K101/06 , B23K103/04 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a UO-formed steel pipe, which method can prevent low temperature cracks caused in a weld metal in the seam welding portion of the UO-formed steel pipe without imposing any restrictions on the chemical composition of the weld metal, and further without lowering the efficiency of a manufacturing process.
SOLUTION: In the seam welding portion of the UO-formed steel pipe formed by a preceding seam welding operation and the following seam welding operation, the upper limit of the amount of diffusible hydrogen in the preceding seam welding portion is restricted, and also a tensile stress caused in the weld metal in the preceding seam welding is reduced by specifying a ratio W2/W1 so as to satisfy the following expressions: 0.6≤W2/W1≤0.8 or 1.2≤W2/W1≤2.5, where W1 shows the thickness of the weld metal in the preceding seam welding, and W2 shows the thickness of the weld metal in the following seam welding.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种UO形钢管的制造方法，该方法能够防止在UO型钢管的缝焊部分中的焊接金属中产生的低温裂纹，而不施加任何限制焊接金属的化学成分，并且不降低制造工艺的效率。解决方案：在通过先前的缝焊操作形成的UO形钢管的缝焊部分和随后的缝焊操作中，限制前面的缝焊部分中的扩散氢量的上限，并且通过规定比率W2 / W1，也可以减少前面的缝焊中的焊接金属的拉伸应力，满足下式：0.6≤W2/W1≤0.8或1.2≤W2/W1≤2.5，其中W1表示焊接金属在前面的缝焊中的厚度，W2表示焊接金属在下面的缝焊中的厚度。版权所有（C）2007，JPO＆INPIT

99. 发明专利

JP2006263814A High strength welded steel tube having excellent hydrogen embrittlement cracking chracteristic resistance of weld metal 有权
标题翻译：高强度焊接钢管，具有优异的抗压强度，耐磨损，耐磨性好
公开(公告)号：JP2006263814A
公开(公告)日：2006-10-05
申请号：JP2006025897
申请日：2006-02-02
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI , HARA TAKUYA , ASAHI HITOSHI , MORIMOTO YUTAKA , TERADA YOSHIO , YOSHIDA TATSUYA , SHINADA KOICHI
IPC分类号： B21C37/08 , B21C37/30 , B23K9/00 , B23K9/23 , B23K31/00 , B23K35/30 , B23K101/06 , B23K103/04 , C21D9/08 , C21D9/50 , C22C38/00 , C22C38/58
CPC分类号： B23K31/027 , B21C37/08 , B23K33/006 , B23K2201/06 , C21D3/06 , C21D9/08 , C21D9/50 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/58 , Y10T29/5185
摘要： PROBLEM TO BE SOLVED: To provide a high-strength welded steel tube having excellent welded part hydrogen embrittlement cracking characteristic resistance and a method for manufacturing the same. SOLUTION: In the method for manufacturing the welded steel tube in which seam welding of a tensile strength of ≥850 Mpa is performed from an inner surface and an outer surface, then tube expanding or shrinking straightening are performed, the hydrogen concentration of the weld metal preceded on the inner and outer surfaces of the steel tube is ≤0.2 cc per 100 g at ordinary temperature before the straightening and the hydrogen concentration of the preceded weld metal is ≤0.2 cc per 100 g at ordinary temperature. COPYRIGHT: (C)2007,JPO&INPIT

100. 发明专利

JP2004011008A STEEL MEMBER AND STRUCTURE EXCELLENT IN WELD ZONE TOUGHNESS 审中-公开
公开(公告)号：JP2004011008A
公开(公告)日：2004-01-15
申请号：JP2002169500
申请日：2002-06-11
申请人： NIPPON STEEL CORP
发明人： KOJIMA AKIHIKO , TERADA YOSHIO , MURATA MASAHIKO
IPC分类号： C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel member and a structure which have strength satisfying API (American Pipe Institute) standards 5L-X65 or higher, and in which critical CTOD (Crack Tip Opening Displacement) at -10°C is ≥0.20 mm in both of a weld metal and a weld line in the weld zone with electron beam welding or laser welding applied. SOLUTION: The steel member and structure have chemical components comprising, by mass, 0.03 to 0.12% C, 1.2 to 2.0% Mn, 0.002 to 0.005% S, 0.001 to 0.05% Al, 0.005 to 0.03% Ti, 0.001 to 0.008% N and 0.001 to 0.004% O, and the balance iron with inevitable impurities, and in which the area ratio of a martensite/austenite constituent in the weld zone with high energy density welding applied is ≤2%. Inclusion particles of 0.5 to 10 μm in the weld zone comprise Ca or rare earth metals or Zr of ≥5 mass% in the mean composition. COPYRIGHT: (C)2004,JPO

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