公开(公告)号：US5723089A

公开(公告)日：1998-03-03

申请号：US824079

申请日：1997-03-24

申请人： Rikio Chijiiwa ,  Hiroyuki Ogawa ,  Koichi Shinada ,  Yoshinori Ogata ,  Hiroshi Tamehiro ,  Hajime Ishikawa ,  Isamu Kimoto ,  Yoshio Terada

发明人： Rikio Chijiiwa ,  Hiroyuki Ogawa ,  Koichi Shinada ,  Yoshinori Ogata ,  Hiroshi Tamehiro ,  Hajime Ishikawa ,  Isamu Kimoto ,  Yoshio Terada

IPC分类号： B23K35/02 ,  B23K35/30 ,  C22C38/28

CPC分类号： B23K35/3053 ,  B23K35/0261 ,  B23K35/3066 ,  B23K35/308 ,  Y10S148/909

摘要： A wire for gas metal arc welding containing 0.01 to 0.06 wt % of C, 0.10 to 0.60 wt % of Si, 0.9 to 3.1 wt % of Mn, 0.7 to 2.0 wt % of Cr, 0.005 to 0.06% of Ti, not greater than 0.08 wt % of Al and if necessary, 0.05 to 0.30 wt % of Cu, and the balance of Fe and unavoidable impurities. This wire improves the selective corrosion resistance and the low temperature toughness of the resulting weld metal, and is particularly suitable for circumferential welding of line pipes for transporting CO.sub.2 -containing petroleum, natural gases or CO.sub.2.

摘要翻译： 含有C：0.01〜0.06重量％，Si：0.10〜0.60重量％，Mn：0.9〜3.1重量％，Cr：0.7〜2.0重量％，Ti：0.005〜0.06重量％ 0.08重量％的Al，如果需要，为0.05〜0.30重量％的Cu，余量为Fe和不可避免的杂质。 该线材提高了所得到的焊接金属的选择性腐蚀性和低温韧性，特别适用于输送含CO 2的石油，天然气或二氧化碳的管线的周向焊接。

公开(公告)号：USRE31251E

公开(公告)日：1983-05-24

申请号：US207068

申请日：1980-11-14

申请人： Hajime Nakasugi ,  Hiroaki Masui ,  Hiroshi Tamehiro ,  Tetuo Takeda ,  Seiji Eiro

发明人： Hajime Nakasugi ,  Hiroaki Masui ,  Hiroshi Tamehiro ,  Tetuo Takeda ,  Seiji Eiro

IPC分类号： C22C38/00 ,  C21D6/00 ,  C21D8/02 ,  C21D9/52

CPC分类号： C21D8/0226 ,  C21D8/021 ,  C21D8/0263

摘要： The production process characterized in that a steel ingot or slab containing not less than 0.004% of TiN not larger than 0.02.mu. is heated to a temperature not higher than 1150.degree. C. and rolled, and growth of the .gamma. grains during this heating and rolling step is prevented by TiN to improve the toughness, and the resultant steel product has an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher, and is useful as hot rolled or as heated at a temperature ranging from 300.degree. to 750.degree. C. after the hot rolling.

公开(公告)号：US06532995B1

公开(公告)日：2003-03-18

申请号：US09478653

申请日：2000-01-06

申请人： Hitoshi Asahi ,  Hiroshi Tamehiro ,  Takuya Hara ,  Yoshio Terada ,  Shigeru Ohkita ,  Kunio Koyama

发明人： Hitoshi Asahi ,  Hiroshi Tamehiro ,  Takuya Hara ,  Yoshio Terada ,  Shigeru Ohkita ,  Kunio Koyama

IPC分类号： F16L900

CPC分类号： C22C38/12 ,  C22C38/04 ,  C22C38/08 ,  C22C38/44 ,  C22C38/46 ,  C22C38/58 ,  Y10T29/18

摘要： To provide a super-high strength line pipe that is excellent in low temperature toughness, can be field welded easily, and has a tensile strength of at least 900 MPa (exceeding ×100 of the API standard), and a production method thereof. The present invention relates to a super-high strength line pipe produced by shaping a steel plate into a pipe shape and arc welding seam portions, the strength of a base steel portion is 900 to 1,100 MPa and the strength of the weld metal is higher than the base steel strength −100 MPa. In the steel pipe, the Ni content of the weld metal is higher by at least 1% than that of the base steel. The combination of the chemical components of the steel plate with those of the weld metal, for accomplishing these steel pipes by a U&O step is shown concretely. A production method of the steel plate and the welding method for achieving the steel pipe are also described. Furthermore, a method of reducing the strength of the inner surface of the weld metal to restrict cracking at the time of pipe expansion is also shown.

摘要翻译： 为了提供低温韧性优异的超高强度线管，可以容易地进行现场焊接，并且具有至少900MPa（超过API标准的×100）的拉伸强度及其制造方法。 本发明涉及一种通过将钢板成形为管状和电弧焊缝部而制造的超高强度线管，基部钢的强度为900〜1100MPa，焊接金属的强度高于 基钢强度-100MPa。 在钢管中，焊接金属的Ni含量比基体钢高1％以上。 具体地说，钢板的化学成分与焊接金属的化学成分的组合，通过U＆O工序来实现这些钢管。 还描述了钢板的制造方法和用于实现钢管的焊接方法。 此外，还示出了降低焊接金属内表面的强度以限制管膨胀时的开裂的方法。

公开(公告)号：US5817275A

公开(公告)日：1998-10-06

申请号：US408655

申请日：1995-03-21

申请人： Hiroyuki Ogawa ,  Hiroshi Tamehiro ,  Akihiko Takahashi ,  Hajime Ishikawa ,  Takuya Hara

发明人： Hiroyuki Ogawa ,  Hiroshi Tamehiro ,  Akihiko Takahashi ,  Hajime Ishikawa ,  Takuya Hara

IPC分类号： C22C38/00 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/38

CPC分类号： C22C38/28 ,  C22C38/20 ,  C22C38/24

摘要： A steel plate comprising by weight C: 0.01 to 0.1%, Si: 0.02 to 0.5%, Mn: 0.6 to 2.0%, P

摘要翻译： 1.一种钢板，其包含C：0.01〜0.1％，Si：0.02〜0.5％，Mn：0.6〜2.0％，P <0.020％，S <0.010％，O <0.005％，Cr：0.1〜0.5％ ：0.1〜1.0％，Al：0.005〜0.05％，Ca：0.0005〜0.005％，Mn，S，O各自的含量调节为满足式Mnx（S + O）= 1.5×10 -2和0.01〜0.1％的选自Nb，V和Ti中的至少一种，余量由Fe和不可避免的杂质组成。 该钢板在含有二氧化碳气体和硫化氢的环境中具有优异的耐腐蚀性和耐硫化物应力开裂性。

公开(公告)号：US4105474A

公开(公告)日：1978-08-08

申请号：US786946

申请日：1977-04-12

申请人： Hajime Nakasugi ,  Hiroaki Masui ,  Hiroshi Tamehiro ,  Tetuo Takeda ,  Seiji Eiro

发明人： Hajime Nakasugi ,  Hiroaki Masui ,  Hiroshi Tamehiro ,  Tetuo Takeda ,  Seiji Eiro

IPC分类号： C22C38/00 ,  C21D6/00 ,  C21D8/02 ,  C21D9/52 ,  C21D7/14

CPC分类号： C21D8/0226 ,  C21D8/021 ,  C21D8/0263

摘要： The production process characterized in that a steel ingot or slab containing not less than 0.004% of TiN not larger than 0.02.mu. is heated to a temperature not higher than 1150.degree. C and rolled, and growth of the .gamma. grains during this heating and rolling step is prevented by TiN to improve the toughness, and the resultant steel product has an excellent low-temperature toughness with a yield point of 40 kg/mm.sup.2 or higher, and is useful as hot rolled or as heated at a temperature ranging from 300.degree. to 750.degree. C after the hot rolling.

公开(公告)号：US06224689B1

公开(公告)日：2001-05-01

申请号：US09123859

申请日：1998-07-28

申请人： Jayoung Koo ,  Michael J. Luton ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

发明人： Jayoung Koo ,  Michael J. Luton ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

IPC分类号： C22C3812

CPC分类号： C22C38/08 ,  C21D1/19 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： An ultra-high strength essentially boron-free steel having a tensile strength of at least about 900 MPa (130 ksi), a toughness as measured by Charpy V-notch impact test at −40° C. (−40° F.) of at least about 120 joules (90 ft-lbs), and a microstructure comprising predominantly fine-grained lower bainite, fine-grained lath martensite, or mixtures thereof, transformed from substantially unrecrystallized austenite grains and comprising iron and specified weight percentages of the additives: carbon, silicon, manganese, copper, nickel, niobium, vanadium, molybdenum, chromium, titanium, aluminum, calcium, Rare Earth Metals, and magnesium, is prepared by heating a steel slab to a suitable temperature; reducing the slab to form plate in one or more hot rolling passes in a first temperature range in which austenite recrystallizes; further reducing said plate in one or more hot rolling passes in a second temperature range below said first temperature range and above the temperature at which austenite begins to transform to ferrite during cooling; quenching said plate to a suitable Quench Stop Temperature; and stopping said quenching and allowing said plate to air cool to ambient temperature.

摘要翻译： 具有至少约900MPa（130ksi）拉伸强度的超高强度基本上不含硼的钢，在-40℃（-40°F）下通过夏比V-缺口冲击试验测得的韧性 至少约120焦耳（90ft-lbs），以及由基本上未再结晶的奥氏体晶粒转化并且包含铁和特定重量百分比的添加剂的主要包含细粒度的下贝氏体，细粒状板条马氏体或其混合物的显微组织： 通过将钢坯加热到合适的温度来制备碳，硅，锰，铜，镍，铌，钒，钼，铬，钛，​​铝，钙，稀土金属和镁。 在奥氏体重结晶的第一温度范围内，在一个或多个热轧道中将板坯还原成板; 在低于所述第一温度范围的第二温度范围内并且高于在冷却期间奥氏体开始转变为铁素体的温度的一个或多个热轧道中进一步减少所述板; 将所述板淬火至合适的淬火停止温度; 并停止所述淬火并允许所述板空气冷却至环境温度。

公开(公告)号：US5985053A

公开(公告)日：1999-11-16

申请号：US973446

申请日：1997-12-04

申请人： Takuya Hara ,  Hitoshi Asahi ,  Hiroshi Tamehiro ,  Ryuji Uemori ,  Naoki Saito

发明人： Takuya Hara ,  Hitoshi Asahi ,  Hiroshi Tamehiro ,  Ryuji Uemori ,  Naoki Saito

IPC分类号： C22C38/00 ,  C22C38/04 ,  C22C38/14 ,  C22C38/58 ,  C22C38/28 ,  C22C38/50

CPC分类号： C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/14

摘要： A steel having excellent HAZ toughness can be used for ships, buildings, pressure containers, linepipes, and so forth. The steel is of a Ti--Mg--O system steel containing at least 40 pcs/mm.sup.2 of oxide and composite oxide particles of Ti and Mg having a size of 0.001 to 5.0 .mu.m. A steel having excellent HAZ toughness can be produced, and the safety of structures using this steel can be remarkably improved.

摘要翻译： PCT No.PCT / JP97 / 01335 Sec。 371 1997年12月4日第 102（e）1997年12月4日PCT PCT 1997年4月17日PCT公布。 公开号WO97 / 39157 PCT 日期1997年10月23日具有优异HAZ韧性的钢可用于船舶，建筑物，压力容器，管线等。 该钢是含有至少40个/ mm 2的氧化物的Ti-Mg-O体系钢，具有0.001〜5.0μm的Ti和Mg的复合氧化物粒子。 可以制造具有优异HAZ韧性的钢，并且可以显着提高使用该钢的结构的安全性。

公开(公告)号：US5755895A

公开(公告)日：1998-05-26

申请号：US718567

申请日：1996-10-10

申请人： Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

发明人： Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

IPC分类号： C22C38/04 ,  C22C38/44 ,  C22C38/48

CPC分类号： C22C38/04 ,  Y10S148/909

摘要： An ultra-high strength low yield ratio line pipe steel has an excellent HAZ toughness and field weldability and has a tensile strength of at least 950 MPa (exceeding X100 of the API standard). The steel is of a low carbon-high Mn-Ni-Mo-Nb-trace Ti type selectively containing B, Cu, Cr and V, whenever necessary. Its micro-structure comprises a martensite/bainite and ferrite soft/hard two-phase mixed structure having a ferrite fraction of 20 to 90%. This ferrite contains 50 to 1000 of worked ferrite, and the ferrite grain size is not greater than 5 Am. The production of an ultra-high strength low yield ratio line pipe steel (exceeding X100) excellent in low temperature toughness and field weldability becomes possible. As a result, the safety of a pipeline can be remarkably improved, and execution efficiency and transportation efficiency of the pipeline can be drastically improved.

摘要翻译： PCT No.PCT / JP96 / 00157 Sec。 371日期：1996年10月1日 102（e）日期1996年10月1日PCT 1996年1月26日PCT PCT。 第WO96 / 23909号公报 日期1996年8月8日超高强度低屈服比管线钢具有优异的HAZ韧性和现场焊接性，拉伸强度至少为950MPa（超过API标准的X100）。 该钢是选择性含有B，Cu，Cr和V的低碳高Mn-Ni-Mo-Nb-微量Ti型。 其微结构包括铁素体分数为20〜90％的马氏体/贝氏体和铁素体软/硬两相混合结构。 该铁氧体含有50〜1000个加工铁素体，铁素体晶粒尺寸不大于5A。 可以生产出具有优异的低温韧性和现场焊接性的超高强度低屈服比管线钢管（超过X100）。 因此，可以显着提高管道的安全性，可以显着提高管道的执行效率和运输效率。

公开(公告)号：US5147474A

公开(公告)日：1992-09-15

申请号：US614076

申请日：1990-11-13

申请人： Hiroshi Tamehiro ,  Rikio Chiziiwa ,  Yoshifumi Sakumoto ,  Kazuo Funato ,  Yuzuru Yoshida ,  Koichiro Keira

发明人： Hiroshi Tamehiro ,  Rikio Chiziiwa ,  Yoshifumi Sakumoto ,  Kazuo Funato ,  Yuzuru Yoshida ,  Koichiro Keira

IPC分类号： C21D8/00 ,  C22C38/12

CPC分类号： C21D8/005 ,  C21D9/0068 ,  C22C38/001 ,  C22C38/04 ,  C22C38/12 ,  Y10T428/31678

摘要： Disclosed is a process for manufacturing a building construction steel having excellent high-temperature characteristics, which can be marketed at an economically reasonable price. According to this process, a slab having a steel composition in which appropriate amounts of Mo and Nb are added to a low-C and low-Mn steel is heated at a high temperature and rolling is finished at a relatively high temperature, or a slab having a steel composition in which an appropriate amount of Mo is added to a low-C and low-Mn steel composition is heated at a high temperature, rolling is finished at a relatively high temperature, and at the subsequent air-cooling step, water cooling is started at a temperature of a ferrite fraction of 20 to 50% during the transformation from austenite to ferrite, water cooling is carried out to an arbitrary temperature lower than 550.degree. C., followed by air cooling.

公开(公告)号：US4990196A

公开(公告)日：1991-02-05

申请号：US364608

申请日：1989-06-09

申请人： Hiroshi Tamehiro ,  Rikio Chiziiwa ,  Yoshifumi Sakumoto ,  Kazuo Funato ,  Yuzuru Yoshida ,  Koichiro Keira

发明人： Hiroshi Tamehiro ,  Rikio Chiziiwa ,  Yoshifumi Sakumoto ,  Kazuo Funato ,  Yuzuru Yoshida ,  Koichiro Keira

IPC分类号： C21D8/00 ,  C22C38/12

CPC分类号： C21D8/005 ,  C21D9/0068 ,  C22C38/001 ,  C22C38/04 ,  C22C38/12 ,  Y10T428/31678

摘要： Disclosed is a process for manufacturing a building construction steel having excellent high-temperature characteristics, which can be marketed at an economically reasonable price. According to this process, a slab having a steel composition in which appropriate amounts of Mo and Nb are added to a low-C and low-Mn steel is heated at a high temperature and rolling is finished at a relatively high temperature, or a slab having a steel composition in which an appropriate amount of Mo is added to a low-C and low-Mn steel composition is heated at a high temperature, rolling is finished at a relatively high temperature, and at the subsequent air-cooling step, water cooling is started at a temperature of a ferrite fraction of 20 to 50% during the transformation from austenite to ferrite, water cooling is carried out to an arbitrary temperature lower than 550.degree. C., followed by air cooling.