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31. 发明专利

JP2007297645A Steel tube with excellent workability, and its manufacturing method 审中-公开
标题翻译：具有优异工作性能的钢管及其制造方法
公开(公告)号：JP2007297645A
公开(公告)日：2007-11-15
申请号：JP2006058886
申请日：2006-03-06
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 , C21D9/08 , C21D9/50 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel tube having excellent workability and used for automotive parts, machine structural parts, etc., and also to provide its manufacturing method. SOLUTION: The steel tube excellent in workability has a composition containing, by weight, 0.05 to 0.25% C, ≤0.60% Si, 0.20 to 2.50% Mn, ≤0.020% P, ≤0.010% S, 0.005 to 0.050% Al and ≤0.0050% N as essential components and also has, in the whole region of a cross section perpendicular to the tube-axis direction of the steel tube, a composite structure which comprises ≥50% ferrite fraction and the balance containing either or both of martensite and bainite. Further, in the whole region in the circumferential direction of the steel tube, a ratio between yield strength and tensile strength, YR, is ≤0.50. Its manufacturing method is also provided. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的可加工性并用于汽车部件，机械结构部件等的钢管，并且还提供其制造方法。解决方案：加工性优异的钢管具有重量含有0.05-0.25％C，≤0.60％Si，0.20-2.50％Mn，≤0.020％P，≤0.010％S，0.005-0.050％ Al和≤0.0050％N作为必要成分，并且在与钢管的管轴方向垂直的截面的整个区域中，具有包含≥50％铁素体部分的复合结构和包含任一种或两者的平衡的复合结构的马氏体和贝氏体。此外，在钢管的圆周方向的整个区域中，屈服强度与拉伸强度之比YR为≤0.50。还提供其制造方法。版权所有（C）2008，JPO＆INPIT

32. 发明专利

JP2006009141A Electric resistance welded tube having excellent cold workability and hardenability and its production method 有权
标题翻译：具有优异的冷加工性和可靠性及其生产方法的电阻焊管
公开(公告)号：JP2006009141A
公开(公告)日：2006-01-12
申请号：JP2005015320
申请日：2005-01-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , NIIYAMA FUMIHIKO , SAWADA SHINYA
IPC分类号： C22C38/00 , C21D9/08 , C21D9/50 , C22C38/04 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide an electric resistance welded tube having excellent workability and excellent hardenability by spheroidizing heat treatment in consideration of the fact that workability and the securance of sufficient strength (hardness) by hardening after working are required for a high carbon steel tube for automobiles and machine structures, and to provide its production method.
SOLUTION: The electric resistance welded tube having excellent cold workability and hardenability contains, by mass, 0.25 to 0.50% C, ≤0.35% Si, 0.60 to 1.50% Mn, ≤0.0025% S and ≤0.010% P, and in which the area ratio of cementite with the maximum length of ≤2 μm in the cross-section vertical to the direction of the tube axis is ≥60% to the whole cementite, and further, the diameter of the equivalent circle of the crystal grains of ferrite is ≥5 μm.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：考虑到需要加工性和加工后硬化足够的强度（硬度）以确保高的加工性和保证性，因此提供了通过球化热处理而具有优异的加工性和优异的淬透性的电阻焊管。用于汽车和机械结构的碳钢管，并提供其生产方法。解决方案：具有优异的冷加工性和淬透性的电阻焊管质量分别含有C：0.25〜0.50％C，≤0.35％Si，0.60〜1.50％Mn，≤0.0025％S，≤0.010％P，在垂直于管轴方向的横截面中，最大长度≤2μm的渗碳体的面积比对于整个渗碳体为≥60％，此外，晶粒的当量圆的直径铁氧体≥5μm。版权所有（C）2006，JPO＆NCIPI

33. 发明专利

JP2004330242A Steel pipe with superior stiffness, and its manufacturing method 审中-公开
公开(公告)号：JP2004330242A
公开(公告)日：2004-11-25
申请号：JP2003129132
申请日：2003-05-07
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , OSAWA TAKASHI , SAWADA SHINYA
IPC分类号： B21C37/083 , B21C37/08 , B21D5/01 , B21D5/14
摘要： PROBLEM TO BE SOLVED: To provide a steel pipe used for a member with a superior shock-resistant property.
SOLUTION: The Young's modulus of a rolled steel plate has an anisotropic characteristic. A direction for maximizing the Young's modulus is different from a rolling direction. The Young's modulus is possible to be 215 GPa or more in the vicinity of the direction maximizing the Young's modulus. The steel plate 12 is obliquely cut at an arbitrary angle toward a rolling direction 18 of the rolled steel plate 11. The steel pipe formed in a pipe shape by roll-bending or press-forming in such a manner that the cutting direction 14 of the steel plate 12 coincides with a pipe-axis direction 4 of a steel pipe 1 can be made as a steel pipe used for an axial collapse-resistant member with the Young's modulus of 215 GPa or more at the pipe-axis direction 4. The steel pipe has the Young's modulus of 215 GPa or more at the circumferential direction 5 and can be used as a member capable of receiving shock-bending load from a lateral direction of the steel pipe.
COPYRIGHT: (C)2005,JPO&NCIPI

34. 发明专利

JP2004195504A Apparatus and method for forming steel pipe and manufacturing equipment train 审中-公开
公开(公告)号：JP2004195504A
公开(公告)日：2004-07-15
申请号：JP2002366649
申请日：2002-12-18
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OSAWA TAKASHI , SAWADA SHINYA , SAKAMOTO SHINYA , NIWA TOSHIYUKI , NOMURA SHIGEHIKO
IPC分类号： B21C37/08 , B21D5/01
摘要： PROBLEM TO BE SOLVED: To provide a welded steel pipe the dimensional accuracy of which is improved by suppressing an angular shape generated at the press reducing point of a press.
SOLUTION: This forming apparatus of the steel pipe is constituted so as to manufacture an open pipe by forming the steel sheet of a base stock with a press. This forming apparatus is provided with a punch having a projecting part for pressing the steel sheet from above and a die having a concave part for receiving the steel sheet pressed with the punch. This forming apparatus has a counter punch for pressing the steel sheet to the side of the punch by being projected from the side of the die when the steel sheet is pressed with the punch. This forming apparatus has a controller for controlling the pressing pressure to the steel sheet of the counter punch at not less than a specified value.
COPYRIGHT: (C)2004,JPO&NCIPI

35. 发明专利

JP2004068040A High-strength steel pipe superior in workability, and manufacturing method therefor 有权
标题翻译：高强度钢管超级能力及其制造方法
公开(公告)号：JP2004068040A
公开(公告)日：2004-03-04
申请号：JP2002225012
申请日：2002-08-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SHINOHARA YASUHIRO , ASAHI HITOSHI , YOSHINAGA NAOKI , FUJITA NOBUHIRO , HIROSHIGE ITSURO , SAKAMOTO SHINYA , TAKAHASHI MANABU
IPC分类号： C21D8/10 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel pipe superior in workability, suitable for structural parts, piping or the like that are manufactured by hydroforming, having an r-value and an n-value improved to an unprecedented level, and to provide a manufacturing method therefor.
SOLUTION: The high-strength steel pipe superior in workability has a tensile strength of 350 MPa or higher, the r-values of 1.3 or more both in an axial direction and a circumferential direction of the pipe, and a relationship between the n-value "n" in the axial direction and the tensile strength "TS [MPa]" so as to satisfy TS + 3,285×n > 1,082. The manufacturing method comprises heating a steel slab, hot-rolling it into a finishing temperature of 830°C or higher, cooling it, winding it up at 600°C or lower, cold-rolling it at a cold rolling reduction of 30% or higher but lower than 75%, then heating it to a lower temperature than the recrystallization temperature while keeping it in 450-600°C for 100 seconds or longer, cooling it, tubulizing it, and then heating it to the recrystallization temperature or higher but A
c1 +50°C or lower. The tubulized pipe from the cold-rolled steel sheet may be heated to the recrystallization temperature or higher but A
c1 +50°C or lower, while being kept in 450-600°C for 100 seconds or longer.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了提供优异的加工性的高强度钢管，适用于通过液压成形制造的结构部件，管道等，其r值和n值提高到前所未有的水平并提供其制造方法。解决方案：加工性优异的高强度钢管的拉伸强度为350MPa以上，管的轴向和圆周方向的r值为1.3以上， n值在轴向上，拉伸强度“TS [MPa]”，以满足TS + 3,285×n> 1,082。制造方法包括加热钢坯，将其热轧至830℃以上的终轧温度，冷却，在600℃以下卷绕，以30％的冷轧压下率进行冷轧，高于但低于75％，然后将其加热到比再结晶温度低的温度，同时将其保持在450-600℃持续100秒或更长时间，冷却，将其煮沸，然后加热至再结晶温度或更高，但是 A c1 + 50℃以下。冷轧钢板的管状管可以在450-600℃保持100秒以上的状态下加热至再结晶温度以上，但A c1 <+ 50℃以下。版权所有（C）2004，JPO

36. 发明专利

JP2004052103A Steel sheet superior in deep drawability, steel pipe superior in workability, and manufacturing method therefor 有权
标题翻译：钢板厚度可靠性高，钢管高可靠性及其制造方法
公开(公告)号：JP2004052103A
公开(公告)日：2004-02-19
申请号：JP2002368878
申请日：2002-12-19
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YOSHINAGA NAOKI , FUJITA NOBUHIRO , SHINOHARA YASUHIRO , TAKAHASHI MANABU , SAKAMOTO SHINYA , HASHIMOTO KOJI
IPC分类号： C21D9/48 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet and a steel pipe superior in deep drawability used for panels, a suspension and members of automobiles, and to provide a manufacturing method therefor.
SOLUTION: The steel sheet and steel pipe contain a predetermined amount of C and Mn, and have an average r-value of 1.2 or higher. The method for manufacturing the steel sheet superior in deep drawability comprises hot-rolling the steel in such a condition selected as to refine carbides and uniformize a hot-rolled structure, cold-rolling it in a rolling reduction of 35% or higher but less than 85%, heating it at an average heating rate of 4 to 200°C/hr, and annealing it at the maximum ultimate temperature of 600 to 800°C. The steel pipe and the manufacturing method are also disclosed.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于板材，悬架和汽车部件的深冲性优良的钢板和钢管，并提供其制造方法。解决方案：钢板和钢管含有预定量的C和Mn，并且具有1.2或更高的平均r值。制造深拉伸性优异的钢板的方法包括在选择碳化物精炼和使热轧结构均匀化的条件下对钢进行热轧，在轧制压下率为35％以上但低于 85％，以4〜200℃/ hr的平均加热速度进行加热，在600〜800℃的最高极限温度下退火。还公开了钢管及其制造方法。版权所有（C）2004，JPO

37. 发明专利

JP2003064444A High strength steel sheet with excellent deep drawability, and manufacturing method therefor 有权
标题翻译：具有优异深度可拉伸性的高强度钢板及其制造方法
公开(公告)号：JP2003064444A
公开(公告)日：2003-03-05
申请号：JP2001255385
申请日：2001-08-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YOSHINAGA NAOKI , FUJITA NOBUHIRO , TAKAHASHI MANABU , HASHIMOTO KOJI , SAKAMOTO SHINYA , SHINOHARA YASUHIRO , SENUMA TAKEHIDE
IPC分类号： C21D9/46 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet having excellent workability and a manufacturing method therefor.
SOLUTION: The high strength steel sheet contains a prescribed amount of C and has ≥1.3 average r-value and further has ≥3%, in total, of one or more kinds among bainite, martensite and austenite in its structure. This high strength steel sheet with superior deep drawability can be manufactured by regulating the draft at cold rolling to 30-95% and carrying out annealing for the improvement of r-value and successive heat treatment for obtaining the above structure.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种具有优异的可加工性的钢板及其制造方法。解决方案：高强度钢板的结构中，贝氏体，马氏体和奥氏体中含有规定量的C且具有> = 1.3的平均r值，并且总共≥3％。这种具有优异的深冲性的高强度钢板可以通过将冷轧时的牵伸速度调节到30-95％并进行退火以提高r值和连续热处理以获得上述结构来制造。

38. 发明专利

JP2003041345A Steel pipe of welded thin sheet and manufacturing method therefor 审中-公开
标题翻译：焊接薄钢管及其制造方法
公开(公告)号：JP2003041345A
公开(公告)日：2003-02-13
申请号：JP2001234988
申请日：2001-08-02
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , SHIODA KOSAKU , ISHIBASHI HIROO
IPC分类号： F16L9/16 , B21C37/08 , B21D26/033 , B21D26/053 , B23K26/00 , B23K26/20 , B23K101/06 , B23K103/04 , C22C38/00 , C22C38/06 , C22C38/14 , C22C38/38 , B21D26/02
摘要： PROBLEM TO BE SOLVED: To provide a thin-wall steel pipe having high strength and satisfactory workability, particularly superior in hydroforming workability, and a manufacturing method therefor. SOLUTION: The steel pipe has a welded and joined structure of a thin sheet comprised of either a TRIP steel, a DP steel, an IF steel, a BH steel, a stainless steel or a plated steel sheet. The steel pipe has such maximum and minimum thickness that the difference between them in a circumferential direction is 2% of the average thickness or less excluding the weld. The weld has width of HAZ of 2 mm or less. The method for manufacturing the steel pipe is characterized by forming the cut steel sheet into a shape of a pipe with press forming, and joining the butting parts with laser welding.
摘要翻译：要解决的问题：提供一种具有高强度和令人满意的加工性的薄壁钢管，特别优于液压加工性能及其制造方法。解决方案：钢管具有由TRIP钢，DP钢，IF钢，BH钢，不锈钢或镀覆钢板组成的薄板的焊接和接合结构。钢管具有这样的最大和最小厚度，它们在圆周方向上的差是除了焊缝之外的平均厚度的2％或更小。焊缝的HAZ宽度为2mm以下。钢管的制造方法的特征在于，将切割钢板形成为具有冲压成形的管的形状，并且通过激光焊接将对接部接合。

39. 发明专利

JP2003004410A Device and method for fitting strain gauge inside tubular body 审中-公开
标题翻译：用于安装管状体内应变量的装置和方法
公开(公告)号：JP2003004410A
公开(公告)日：2003-01-08
申请号：JP2001182973
申请日：2001-06-18
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OHARA NOBUYOSHI , MATSUO YUKINORI , MUKAI KENJI , TAKEDA HIDEKI , SAKAMOTO SHINYA , SUMIMOTO DAIGO
IPC分类号： G01L1/00 , G01B7/16
摘要： PROBLEM TO BE SOLVED: To provide a device and a method for fitting a strain gauge at a specified position inside a tubular body, so that strain is measured accurately during tubulation.
SOLUTION: This device is used to fit a strain gauge inside a tubular body, and it is provided with a bar-like grip which is provided with such a guide roll on its tip that rolls in the inside of the tubular body in its lengthwise direction, a slide lever which is slidable in parallel to and along the grip, and a strain gauge pedestal, in which its one end is connected with the grip and the other end is connected with the slide lever, and which rises, when a distance between both ends becomes small and is lowered when it becomes large. Therefore, strain measurement can be made continuously during molding in a roll stand, contributing to future roll forming technology.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种在管状体内的规定位置安装应变片的装置和方法，使得在管状期间精确地测量应变。解决方案：该装置用于将应变仪装配在管状体内，并且其设置有棒状把手，其在其尖端上设置有这样的导辊，其在管状体的内部沿其长度方向，可以沿着手柄平行滑动的滑动杆和应变计基座，其一端与手柄连接，另一端与滑动杆连接，并且当拉杆两端变小，变大时降低。因此，可以在辊架中成型期间连续地进行应变测量，有助于将来的辊成型技术。

40. 发明专利

BRPI0911117A2 chapa de aço de alta resistência, cano de aço com excelente dureza em baixa temperatura e métodos de produção dos mesmos 未知
公开(公告)号：BRPI0911117A2
公开(公告)日：2015-10-06
申请号：BRPI0911117
申请日：2009-04-07
申请人： NIPPON STEEL CORP
发明人： ASAHI HITOSHI , SAKAMOTO SHINYA , FUJISHIRO TAISHI , HARA TAKUYA
IPC分类号： B21C37/08 , C21D8/02 , C22C38/00 , C22C38/14 , C22C38/58

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