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91. 发明专利

JP2004244675A Hot-dip galvanized high strength steel sheet with excellent bore expandabilty, and its manufacturing method 有权
标题翻译：具有优异的硼透明度的热镀锌高强度钢板及其制造方法
公开(公告)号：JP2004244675A
公开(公告)日：2004-09-02
申请号：JP2003035291
申请日：2003-02-13
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAKEBAYASHI SHIGETO , YOSHINAGA NAOKI , FUJITA NOBUHIRO , TAKAHASHI MANABU
IPC分类号： C23C2/06 , C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet having ≥900 MPa tensile strength and excellent bore expandability and to provide its manufacturing method.
SOLUTION: The steel sheet has a composition containing, by mass, 0.03 to 0.12% C, 0.001 to 0.8% Si, 2.3 to 3.3% Mn, 0.001 to 0.1% P, 0.0001 to 0.01% S and 0.001 to 0.2% Al, further containing, by mass, 0.11 to 1.0% Mo and 0.005 to 0.3% Ti and having the balance Fe with inevitable impurities. This steel sheet has ≥900 MPa tensile strength and ≥45% bore expandability.
COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：提供具有≥900MPa拉伸强度和优异的孔膨胀性的钢板并提供其制造方法。钢板的组成为，含有0.03〜0.12％的C，0.001〜0.8％的Si，2.3〜3.3％的Mn，0.001〜0.1％的P，0.0001〜0.01％的S和0.001〜0.2％ Al，进一步含有0.11〜1.0％的Mo和0.005〜0.3％的Ti，余量为Fe与不可避免的杂质。该钢板具有≥900MPa的拉伸强度和≥45％的孔扩展性。版权所有（C）2004，JPO＆NCIPI

92. 发明专利

JP2004223581A Method for forming lightweight steel sheet 审中-公开
公开(公告)号：JP2004223581A
公开(公告)日：2004-08-12
申请号：JP2003015648
申请日：2003-01-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SENUMA TAKEHIDE , FUJITA NOBUHIRO , OKA MASAHARU
IPC分类号： B21D22/02 , B21D53/88 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a press method of a lightweight steel sheet excellent in impact property by which lightening of automotive parts or the like is possible.
SOLUTION: In this press forming method of a lightweight steel sheet excellent in impact property, a steel sheet consisting of, by mass, 0.001-1.2% C, 7-30% Al, as necessary, one or more kinds of Mn, Si, Nb, Ti, Ni, Mo and Cu of 0.1-10% in total, furthermore, 0.0002-0.1% B, 0.1-10% Cr, one or two kinds of Zr and Ce of 0.01-0.5% in total and the balance Fe with inevitable impurities is heated to ≤ 1,000°C and the press working is performed at 600-1,000°C.
COPYRIGHT: (C)2004,JPO&NCIPI

93. 发明专利

JP2004084024A Galvanized steel tube having excellent workability and corrosion resistance, automobile part and production method therefor 审中-公开
公开(公告)号：JP2004084024A
公开(公告)日：2004-03-18
申请号：JP2002248007
申请日：2002-08-28
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 , SENUMA TAKEHIDE
IPC分类号： C23C2/06 , C21D8/10 , C22C38/00 , C22C38/04 , C22C38/58 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To suppress the formation of oxide scale when a steel tube having a zinc based coating is subjected to reduction working at a relatively high temperature, and to suppress the occurrence of plating defects at the reduction working, the sticking of plating to a reduction roll, the galling of the steel tube to the reduction roll, or the like.
SOLUTION: As for the galvanized steel tube, in the region from the boundary between a Zn-Fe based coating on the surface of the steel tube and ferrite at least to a thickness of 1 μm on the Zn-Fe based coating side, the concentration of Fe is 15 to 50 mass% and/or a Γphase is allowed to exist. Further, the galvanized steel tube is produced by heating a steel tube having a Zn based coating on the surface at 500 to 850°C, and subjecting the steel tube to working at a reduction ratio of 10 to 90%.
COPYRIGHT: (C)2004,JPO

94. 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

95. 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

96. 发明专利

JP2004018971A High-strength, high-ductility hot dip galvanized steel sheet of excellent burring machinability, and method for manufacturing the same 有权
公开(公告)号：JP2004018971A
公开(公告)日：2004-01-22
申请号：JP2002177278
申请日：2002-06-18
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , FUJITA NOBUHIRO , TAKAHASHI MANABU , MORIMOTO YASUHIDE , KUROSAKI MASAO , MIYASAKA AKIHIRO
IPC分类号： C23C2/02 , C21D9/46 , C22C18/00 , C22C38/00 , C22C38/14 , C22C38/58 , C23C2/06 , C23C2/28 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To provide a high-strength, high-ductility hot dip galvanized steel sheet of excellent burring property, and a method manufacturing the same.
SOLUTION: This steel sheet contains, by mass, 0.0001-0.3% C, 0.001-4% Si, 0.001-3% Mn, 0.001-4% Al, 0.001-4% Mo, 0.0001-0.3% P, ≤ 0.01% S, 0.001-1% in total one or two or more kinds out of an element group of Mg, Zr, Ca, Y, Hf and lanthanoids group, and the balance Fe with inevitable impurities. In addition, a microstructure of the steel sheet has a composition consisting of, by volume, 50-97% bainite as a main phase, 3-

97. 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。

98. 发明专利

JP2003049239A High strength galvanized steel sheet having excellent workability and production method therefor 有权
标题翻译：具有优异工作能力的高强度钢化板及其生产方法
公开(公告)号：JP2003049239A
公开(公告)日：2003-02-21
申请号：JP2001287413
申请日：2001-09-20
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MORIMOTO YASUHIDE , FUJITA NOBUHIRO , KUROSAKI MASAO , TAKAHASHI MANABU , MIYASAKA AKIHIRO
IPC分类号： C23C2/06 , C21D9/46 , C22C38/00 , C22C38/06 , C22C38/58 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To provide a high strength galvanized steel sheet in which the generation of unplating is suppressed, and which has excellent appearance and workability, and to provide a production method therefor.
SOLUTION: The high strength galvanized steel sheet having excellent workability has a composition containing, by mass, 0.0001 to 0.3% C, 0.1 to 2.5% Si, 0.01 to 3% Mn and 0.001 to 4% Al, and the balance Fe with inevitable impurities. The surface of the steel sheet is provided with a plated layer having a composition containing 0.001 to 0.5% Al and 0.001 to 2% Mn, and the balance Zn with inevitable impurities. The Si content in the steel: X (mass%), the Mn content in the steel: Y (mass%), the Al content in the steel: Z (mass%), the Al content in the plated layer: A (mass%) and the Mn content in the plated layer: B (mass%) satisfy 3-(X+Y/10+Z/3)-12.5×(A-B)≥0.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供抑制不平衡产生的高强度镀锌钢板，并且具有优异的外观和可加工性，并提供其制造方法。解决方案：具有优异的加工性的高强度镀锌钢板具有以质量计含有0.0001至0.3％的C，0.1至2.5％的Si，0.01至3％的Mn和0.001至4％的Al，余量为Fe和不可避免的杂质。在钢板表面上设置有含有0.001〜0.5％的Al和0.001〜2％Mn的组成的镀层，余量为不可避免的杂质。钢中的Si含量：X（质量％），钢中的Mn含量：Y（质量％），钢中的Al含量：Z（质量％），镀层中的Al含量：A（质量％），镀层中的Mn含量：B（质量％）满足3-（X + Y / 10 + Z / 3）-12.5×（AB）> = 0。

99. 发明专利

JP2959934B2 Heat-resistant ferritic stainless steel 失效
公开(公告)号：JP2959934B2
公开(公告)日：1999-10-06
申请号：JP21880193
申请日：1993-09-02
申请人：新日本製鐵株式会社
发明人： FUJITA NOBUHIRO , YAMAMOTO AKIO , OOMURA KEIICHI
IPC分类号： C22C38/00 , C22C38/28

100. 发明公开

EP1790422A4 HIGH-STRENGTH PART AND PROCESS FOR PRODUCING THE SAME 有权转让
标题翻译：高强度零件与方法研究
公开(公告)号：EP1790422A4
公开(公告)日：2009-03-18
申请号：EP05785864
申请日：2005-09-15
申请人： NIPPON STEEL CORP
发明人： KUSUMI KAZUHISA , SATO HIRONORI , ABE MASAYUKI , FUJITA NOBUHIRO , SUZUKI NORIYUKI , HAYASHI KUNIO , NAKAJIMA SHINYA , MAKI JUN , OOGAMI MASAHIRO , KANDA TOSHIYUKI , TAKAHASHI MANABU , TAKAHASHI YUZO
IPC分类号： B21D28/00 , B21D28/14 , B21D37/16 , B21D53/88 , C21D1/74 , C21D9/46 , C22C38/00 , C22C38/04 , C22C38/38
CPC分类号： C22C38/04 , C21D1/673 , C21D1/74 , C21D8/0205 , C21D9/0068 , C21D9/48 , C21D2211/008 , C22C38/02 , C22C38/06 , C22C38/18 , C22C38/28
摘要： A high-strength part that excels in hydrogen embrittlement resistance and strength after high-temperature forming; and a process for producing the same. The atmosphere in a heating furnace before forming is regulated to one of = 10% hydrogen volume fraction and = 30°C dew point. As a result, the amount of hydrogen penetrating in a steel sheet during heating is reduced. After forming, there are sequentially carried out quench hardening in die assembly and post-working. As the method of post-working, there can be mentioned shearing followed by re-shearing or compression forming of sheared edge portion; punching with a cutting blade having a gradient portion at which the width of blade base is continuously reduced; punching with a punching tool having a curved blade with a protrudent configuration at the tip of cutting blade part, the curved blade having a shoulder portion of given curvature radius and/or given angle; fusion cutting; etc. Consequently, the tensile residual stress after punching is reduced and the performance of hydrogen embrittlement resistance is improved.

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