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41. 发明专利

JPH059575A PRODUCTION OF HIGH STREANGTH STEEL PLATE EXCELLENT IN CORROSION RESISTANCE 失效
公开(公告)号：JPH059575A
公开(公告)日：1993-01-19
申请号：JP16839991
申请日：1991-07-09
申请人： NIPPON STEEL CORP
发明人： TAMEHIRO HIROSHI , TERADA YOSHIO , KAWADA YASUYUKI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/28
摘要： PURPOSE:To obtain an API Standard 5L-X80 class high strength steel plate excellent in hydrogen induced cracking resistance and sulfide stress corrosion cracking resistance by using a low C-low Mn-Nb-trace Ti steel having a specific composition as a base, adding specific amounts of Cr to the above, and performing accelerated cooling after rolling. CONSTITUTION:This steel has a composition consisting of, by weight, 0.02-0.07% C,

42. 发明专利

JPH0456723A PRODUCTION OF STEEL WITH LOW YIELD RATIO FOR CONSTRUCTION USE EXCELLENT IN REFRACTORINESS 失效
公开(公告)号：JPH0456723A
公开(公告)日：1992-02-24
申请号：JP16580990
申请日：1990-06-26
申请人： NIPPON STEEL CORP
发明人： CHIJIIWA RIKIO , TAMEHIRO HIROSHI , TERADA YOSHIO
IPC分类号： C21D8/00 , C22C38/00 , C22C38/50
摘要： PURPOSE:To produce a steel with low yield ratio for construction use excellent in refractoriness by subjecting a steel, having a specific composition in which respective contents of C and Mo are specified, to reheating and hot rolling under respectively specified conditions and forming microstructure into a structure composed essentially of ferrite. CONSTITUTION:A slab of a steel having a composition which consists of, by weight ratio, 0.04-0.11% C, =2 kinds among 0.005-0.05% V, 0.005-0.03% Ti, 0.005-0.03% Zr, 0.0005-0.005% Ca, and 0.001-0.005% REM, and the balance Fe with inevitable impurities and in which Di* value given by equation is regulated to =70% of yield strength at ordinary temp. and also has yield ratio at ordinary temp. as low as

43. 发明专利

JPH03126816A PRODUCTION OF THIN LOW YIELD RATIO STEEL FOR CONSTRUCTION USE EXCELLENT IN REFRACTORINESS 失效
公开(公告)号：JPH03126816A
公开(公告)日：1991-05-30
申请号：JP26471189
申请日：1989-10-11
申请人： NIPPON STEEL CORP
发明人： CHIJIIWA RIKIO , TAMEHIRO HIROSHI , TERADA YOSHIO
IPC分类号： C21D8/02 , C21D8/00 , C22C38/00 , C22C38/12 , C22C38/32 , C22C38/58
摘要： PURPOSE:To produce a thin low yield ratio steel for construction use excellent in refractoriness by subjecting a slab of a steel having a specific composition containing specific amounts of Mo to reheating and to hot rolling under respectively specified conditions and forming a microstructure into bainite. CONSTITUTION:A slab of a steel having a composition which consists of, by weight ratio, 0.02-0.10% C, =0.80, respectively, is reheated at 1150-1300 deg.C and hot rolling is finished at 800-1000 deg.C, by which a microstructure is formed into bainite. By this method, the thin low yield ratio steel for construction use in which high yield strength at 600 deg.C is provided and yield strength at 600 deg.C is regulated to >= about 70% based on yield strength at ordinary temp. and also superior weldability is provided can be obtained.

44. 发明专利

JPH0394015A PRODUCTION OF WEAR RESISTANT STEEL PLATE EXCELLENT IN MACHINABILITY 失效
公开(公告)号：JPH0394015A
公开(公告)日：1991-04-18
申请号：JP22843689
申请日：1989-09-05
申请人： NIPPON STEEL CORP
发明人： TERADA YOSHIO , NISHIDA HOZUMI , IWASAKI YOSHIJI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/60
摘要： PURPOSE:To produce a structural steel plate having wear resistance and superior machinability by subjecting a continuously cast slab of a steel with the prescribed composition to heating up to a specific temp., to rolling, to accelerated cooling, and then to air cooling. CONSTITUTION:A steel having a composition consisting of, by weight, 0.35-0.50% C,

45. 发明专利

JPH01159356A HIGH TENSION STEEL HAVING SUPERIOR TOUGENESS AT WELD HEAT-AFFECTED ZONE 失效
公开(公告)号：JPH01159356A
公开(公告)日：1989-06-22
申请号：JP31614287
申请日：1987-12-16
申请人： NIPPON STEEL CORP
发明人： TERADA YOSHIO , CHIJIIWA RIKIO , TAMEHIRO HIROSHI
IPC分类号： C22C38/00 , C22C38/14 , C22C38/58
摘要： PURPOSE:To obtain a high tension steel having superior toughness at the weld heat-affected zone by specifying a compsn. consisting of C, Si, Mn, P, S, Al, Ti, Zr, N, O and Fe and by incorporating specified grains of Ti-Zr compd. oxide. CONSTITUTION:Grains of Ti-Zr compd. oxide having 0.05-10mum grain size are incorporated into a steel consisting of, by weight, 0.01-0.60% C, -1X10 per 1mm steel. A high tension steel having superior toughness at low temp. is obtd. When the steel is welded, the structure of the weld heat- affected zone is made fine and the zone has superior toughness whether the welding is low heat input welding or high heat input welding.

46. 发明专利

JP2008255394A 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及其制造方法
公开(公告)号：JP2008255394A
公开(公告)日：2008-10-23
申请号：JP2007097216
申请日：2007-04-03
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 , C21D8/02 , C21D9/08 , C21D9/50 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive steel pipe having satisfactory workability, and to provide a method for producing the same.
SOLUTION: In a steel pipe produced by subjecting a steel pipe as a pipe stock to cold pipe drawing and thereafter heating the same in the temperature range from an Ac1 transformation point -70°C to an Ac1 transformation point, in the whole region of the steel pipe including a seam weld zone, the fraction of ferrite is controlled to ≥60%, average crystal grain size is controlled to ≥10 μm, the average value of an aspect ratio is controlled to 1.0 to
摘要翻译：要解决的问题：提供具有令人满意的加工性的便宜的钢管，并提供其制造方法。解决方案：在通过将钢管作为管材进行冷管拉拔然后在Ac1相变点-70℃至Ac1相变点的温度范围内进行加热而制造的钢管中，整体上包括焊缝区域的钢管的区域，将铁素体的分数控制为≥60％，将平均晶粒尺寸控制为≥10μm，将纵横比的平均值控制为1.0〜5.0，并且形成规定的织构以获得其中rL和rC增加的钢管，并且可加工性得到改善。此外，在其制造方法中，将管坯进行冷管拉拔，以规定面积的减小和规定的厚度减小，在Ac1相变点-70℃的温度范围内被加热到Ac1相变点30秒，然后冷却。版权所有（C）2009，JPO＆INPIT

47. 发明专利

JP2006328523A High strength steel pipe for low temperature use 有权
标题翻译：高强度钢管用于低温使用
公开(公告)号：JP2006328523A
公开(公告)日：2006-12-07
申请号：JP2005353209
申请日：2005-12-07
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 , B23K9/23 , B23K35/30 , B23K101/06 , B23K103/04 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel pipe having a strength of X80 or higher in the API standards and having excellent weld zone toughness.
SOLUTION: Regarding a welded steel pipe composed of: a base metal part where, in a low C-Nb-Ti base, the contents of Mg, N and O are strictly limited, and also, fine carbonitride involving oxide composed of Mg and Al and composites consisting of oxide and sulfide are incorporated; a low C-Mn-Ni-Cr-Mo-B based weld metal part; and a HAZ where the old austenite grain size in the HAZ near a melting line is ≤150 μm, and solid solution B is present in the austenite grain boundaries within 150 μm from the melting line, the high strength steel pipe has satisfactory HAZ toughness. According to this invention, the provision of the high strength steel pipe (in a class of X80 to X100) having excellent weld heat affected zone toughness is made possible, thus the safety in marine transportation of CNG is remarkably improved, and further, the effective utilization of resources is made possible.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供API标准中强度为X80以上且具有优异焊接区韧性的钢管。解决方案：关于一种焊接钢管，由以下组成的焊接钢管组成：贱金属部分，其中在低C-Nb-Ti基中，Mg，N和O的含量被严格限制，并且涉及氧化物的细微的碳氮化物由 Mg和Al以及由氧化物和硫化物组成的复合材料; 低C-Mn-Ni-Cr-Mo-B基焊缝金属部件; 在熔融线附近的HAZ中的老奥氏体晶粒尺寸≤150μm的HAZ和在熔融线以上的奥氏体晶界内存在固溶体B，高强度钢管具有令人满意的HAZ韧性。根据本发明，能够提供具有优异的焊接热影响区域韧性的高强度钢管（一类X80〜X100），因此CNG的海运中的安全性显着提高，此外，有效利用资源成为可能。版权所有（C）2007，JPO＆INPIT

48. 发明专利

JP2006283147A High strength steel pipe for pipe line having excellent deformation property after aging, and method for producing the same 有权
标题翻译：用于在老化之后具有优异变形性能的管线的高强度钢管及其制造方法
公开(公告)号：JP2006283147A
公开(公告)日：2006-10-19
申请号：JP2005105787
申请日：2005-04-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SHINOHARA YASUHIRO , TSURU EIJI , HARA TAKUYA , ASAHI HITOSHI , TERADA YOSHIO , DOI NAOKI , MURATA MASAHIKO
IPC分类号： C22C38/00 , C21D8/10 , C22C38/16 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel pipe for a pipe line having excellent deformation properties in which an allowable degree for deformation caused by the variation of the ground or the like is high even after coating treatment for corrosion prevention, and to provide a method for producing the same.
SOLUTION: The high strength steel pipe for a pipe line having excellent deformation properties after aging is obtained by subjecting a steel sheet having a composition comprising, by mass, 0.02 to 0.09% C, 0.001 to 0.8% Si, 0.5 to 2.5% Mn, ≤0.02% P, ≤0.005% S, 0.005 to 0.03% Ti, 0.005 to 0.1% Nb, 0.001 to 0.1% Al and 0.001 to 0.008% N, and further comprising two or more kinds selected from 0.1 to 1.0% Ni, 0.1 to 1.0% Cu and 0.05 to 0.6% Mo, and the balance iron with inevitable impurities to cold forming into a cylindrical shape, and performing seam welding to the edge faces each other, and in a tensile test to the circumferential direction after heating at 150 to 300°C, the upper yield point is lower than its tensile strength, and, in a tensile test to the pipe axis direction, its yield ratio is ≤0.93.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的变形特性的管道，其中即使在防腐蚀涂层处理之后，由于等离子变化引起的变形容许度也高，并且提供其制造方法。解决方案：具有优异变形性能的管线用高强度钢管，其特征在于，将具有0.02〜0.09％质量％，0.001〜0.8％Si，0.5〜2.5质量％％Mn，≤0.02％P，≤0.005％S，0.005〜0.03％Ti，0.005〜0.1％Nb，0.001〜0.1％Al和0.001〜0.008％N，还含有2种以上选自0.1〜1.0％ Ni，0.1〜1.0％的Cu和0.05〜0.6％的Mo，余量的铁与不可避免的杂质冷成型为圆筒状，对边缘面彼此进行缝焊，并且在经过在150〜300℃加热，上屈服点低于拉伸强度，在管轴方向的拉伸试验中，屈服比≤0.93。版权所有（C）2007，JPO＆INPIT

49. 发明专利

JP2005272900A High-strength uoe steel pipe having excellent low-temperature toughness of seam weld metal 审中-公开
标题翻译：具有优异的低温焊接金属的高强度钢管
公开(公告)号：JP2005272900A
公开(公告)日：2005-10-06
申请号：JP2004085775
申请日：2004-03-23
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MORIMOTO YUTAKA , OKITA SHIGERU , HARA TAKUYA , TERADA YOSHIO
IPC分类号： B23K35/30 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a UOE steel pipe for a high-strength line pipe which has a weld zone having excellent low-temperature toughness and is manufactured by shaping a steel sheet having a tensile strength of 800 to 1,100 MPa to a cylindrical shape, then joining the butt parts of the steel sheet by welding.
SOLUTION: The UOE steel pipe is manufactured by shaping the steel sheet having the tensile strength of 800 to 1,100 MPa to the cylindrical shape, then fixing the butt parts of the steel sheet by tack welding or the like, and seam welding the butt parts by submerged arc welding. The high-strength UOE steel pipe having the seam weld metal excellent in the strength and the low-temperature toughness can be obtained by regulating the chemical components of the weld metal.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：解决的问题：为了提供一种高强度线管的UOE钢管，其具有优异的低温韧性的焊接区，并且通过将抗拉强度为800至1100MPa的钢板成形为然后通过焊接将钢板的对接部分接合。解决方案：UOE钢管通过将抗拉强度为800〜1100MPa的钢板成型为圆筒状，然后通过定位焊等固定钢板的对接部，并进行缝焊对接部分采用埋弧焊。通过调整焊接金属的化学成分，可以获得具有优异的强度和低温韧性的缝焊金属的高强度UOE钢管。版权所有（C）2006，JPO＆NCIPI

50. 发明专利

JP2004036290A Thin plate lightweight shape steel excellent in fire resistance 有权
公开(公告)号：JP2004036290A
公开(公告)日：2004-02-05
申请号：JP2002196869
申请日：2002-07-05
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KAWAI YOSHIMICHI , TANAKA SHIGENORI , TERADA YOSHIO
IPC分类号： E04B1/94 , C22C38/00 , C22C38/54 , E04C3/07 , E04C3/32
摘要： PROBLEM TO BE SOLVED: To provide a thin plate lightweight shape steel excellent in fire resistance without causing a sharp decline in its proof stress even in the case of high temperature.
SOLUTION: The thin plate lightweight shape steel excellent in fire resistance constituted by molding the thin plate of a fire resisting steel not more than 215.6 GPa of Young's modulus in normal temperature and at least 147 GPa of Young's modulus at 700°C to make cold working is provided. Design proof stress P of the thin plate lightweight shape steel is regulated in the formula. Where: F
o = yield stress in normal temperature, F
1 = yield stress at 700°C, E
0 = Young's modulus in normal temperature, E
1 = Young's modulus at 700°C, b
e = effective flange width of a plate element of the shape steel and t = design plate thickness.
COPYRIGHT: (C)2004,JPO

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