公开(公告)号：US20140144551A1

公开(公告)日：2014-05-29

申请号：US13820581

申请日：2011-09-02

申请人： Izuru Minato ,  Nobuaki Takahashi ,  Akio Yamamoto

发明人： Izuru Minato ,  Nobuaki Takahashi ,  Akio Yamamoto

IPC分类号： C22C38/50 ,  C22C38/48 ,  C22C38/46 ,  C22C38/00 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/44

CPC分类号： C22C38/50 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/58 ,  F16L9/02

摘要： A high-strength steel sheet having improved HIC resistance and fracture resistance even when it is thick has a chemical composition comprising, in mass %, C: 0.02-0.07%, Si: 0.05-0.50%, Mn: 1.10-1.60%, P: at most 0.015%, S: at most 0.0030%, Nb: 0.005-0.030%, Ti: 0.005-0.020%, Al: 0.005-0.060%, Ca: 0.0005-0.0060%, N: 0.0015-0.0070%, at least one of Cu, Ni, Cr, and Mo in a total of greater than 0.1% to less than 1.5%, and a remainder of Fe and impurities and a steel structure composed of at least 10% by area of bainite and a remainder of ferrite and pearlite. The degree of segregation is less than 1.6 for Nb and less than 1.4 for Mn in the central portion of the thickness of the steel sheet.

摘要翻译： 即使厚度高的耐HIC和耐断裂性提高的高强度钢板也具有以质量％计含有C：0.02-0.07％，Si：0.05-0.50％，Mn：1.10-1.60％，P ：至少0.015％，S：0.0030％以下，Nb：0.005〜0.030％，Ti：0.005〜0.020％，Al：0.005〜0.060％，Ca：0.0005〜0.0060％，N：0.0015-0.0070％ Cu，Ni，Cr和Mo中的一种总计大于0.1％至小于1.5％，剩余的Fe和杂质以及由贝氏体至少10％的面积组成的钢结构和剩余的铁素体 和珠光体。 对于Nb，偏析度小于1.6，在钢板的中心部分的Mn小于1.4。

公开(公告)号：US09528172B2

公开(公告)日：2016-12-27

申请号：US13820581

申请日：2011-09-02

申请人： Izuru Minato ,  Nobuaki Takahashi ,  Akio Yamamoto

发明人： Izuru Minato ,  Nobuaki Takahashi ,  Akio Yamamoto

IPC分类号： C22C38/50 ,  C21D8/02 ,  C22C38/58 ,  F16L9/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

CPC分类号： C22C38/50 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/58 ,  F16L9/02

摘要： A high-strength steel sheet having improved HIC resistance and fracture resistance even when it is thick has a chemical composition comprising, in mass %, C: 0.02-0.07%, Si: 0.05-0.50%, Mn: 1.10-1.60%, P: at most 0.015%, S: at most 0.0030%, Nb: 0.005-0.030%, Ti: 0.005-0.020%, Al: 0.005-0.060%, Ca: 0.0005-0.0060%, N: 0.0015-0.0070%, at least one of Cu, Ni, Cr, and Mo in a total of greater than 0.1% to less than 1.5%, and a remainder of Fe and impurities and a steel structure composed of at least 10% by area of bainite and a remainder of ferrite and pearlite. The degree of segregation is less than 1.6 for Nb and less than 1.4 for Mn in the central portion of the thickness of the steel sheet.

摘要翻译： 即使厚度高的耐HIC和耐断裂性提高的高强度钢板也具有以质量％计含有C：0.02-0.07％，Si：0.05-0.50％，Mn：1.10-1.60％，P ：至少0.015％，S：0.0030％以下，Nb：0.005〜0.030％，Ti：0.005〜0.020％，Al：0.005〜0.060％，Ca：0.0005〜0.0060％，N：0.0015-0.0070％ Cu，Ni，Cr和Mo中的一种总计大于0.1％至小于1.5％，剩余的Fe和杂质以及由贝氏体至少10％的面积组成的钢结构和剩余的铁素体 和珠光体。 对于Nb，偏析度小于1.6，在钢板的中心部分的Mn小于1.4。

公开(公告)号：US20120121453A1

公开(公告)日：2012-05-17

申请号：US13228819

申请日：2011-09-09

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Izuru Minato

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Izuru Minato

IPC分类号： C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/00 ,  C22C38/16 ,  C22C38/18 ,  C22C38/08 ,  C22C38/02 ,  C22C38/14

CPC分类号： C21D8/0247 ,  B21C37/08 ,  C21D1/06 ,  C21D9/08 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： A thick steel plate and a UOE steel pipe having a high strength of at least X60 grade and improved resistance to HIC have a chemical composition consisting essentially of, in mass percent, C: 0.02-0.07%, Si: 0.05-0.50%, Mn: 1.1-1.6%, P: at most 0.015%, S: at most 0.002%, Nb: 0.005-0.060%, Ti: 0.005-0.030%, Al: 0.005-0.06%, Ca: 0.0005-0.0060%, N: 0.0015-0.007%, at least one of Cu, Ni, Cr, and Mo in a total amount of greater than 0.1% and less than 1.5%, and a remainder of Fe and impurities, wherein the degrees of segregation of Nb and Ti are both at most 2.0, and the ratio of (the degree of Nb segregation)/(the degree of Mn segregation) and the ratio of (the degree of Ti segregation)/(the degree of Mn segregation) are both at least 1.0 and at most 1.5.

摘要翻译： 具有至少X60级的高强度和对HIC的耐受性提高的厚钢板和UOE钢管的化学组成基本上以质量％计含有C：0.02-0.07％，Si：0.05-0.50％，Mn ：1.1-1.6％，P：0.015％以下，S：0.002％以下，Nb：0.005-0.060％，Ti：0.005-0.030％，Al：0.005-0.06％，Ca：0.0005-0.0060％，N： 0.0015-0.007％，Cu，Ni，Cr和Mo中的至少一种总量大于0.1％且小于1.5％，余量为Fe和杂质，其中Nb和Ti的偏析度为 两者的比例（最高为2.0），（Nb偏析度）/（Mn偏析度）和（Ti偏析度）/（Mn偏析度）的比率均为1.0以上 最多1.5。

公开(公告)号：US20110070457A1

公开(公告)日：2011-03-24

申请号：US12891276

申请日：2010-09-27

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

IPC分类号： B32B1/08

CPC分类号： C22C38/42 ,  B21D5/015 ,  B21D35/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  F16L9/02 ,  Y10T428/12292

摘要： A high-strength UOE steel pipe which has excellent deformability and excellent low-temperature toughness in its heat affected zone and which is suitable for use in a pipeline installed on permafrost in extremely cold regions or in earthquake-prone regions, for example, is provided. The UOE steel pipe has a steel composition consisting essentially of C: 0.03-0.07%, Si: 0.05-0.50%, Mn: 1.6-2.2%, P: at most 0.020%, S: at most 0.003%, Cu: 0.20-0.60%, Cr: at most 0.10%, Ni: 0.20-0.80%, Nb: 0.005-0.030%, Ti: 0.005-0.030%, N: at most 0.0070%, Al: 0.005-0.060%, and a remainder of Fe and impurities, the hardenability index Pcm is at most 0.22%, Cu+Cr+Ni is 0.4-1.5%, Nb+Mo+V is at most 0.05%. The pipe has a yield strength in the longitudinal direction of at least 480 MPa with a yield-tensile ratio of at most 85% and a Charpy absorbed energy of the heat affected zone at −40° C. of at least 40 J.

摘要翻译： 提供了一种在热影响区具有优异的变形性和优异的低温韧性的高强度UOE钢管，其适用于例如在极寒地区或地震多发地区中安装在永久冻土层上的管道中 。 UOE钢管具有基本上由C：0.03-0.07％，Si：0.05-0.50％，Mn：1.6-2.2％，P：至多0.020％，S：至多0.003％，Cu：0.20- 0.60％，Cr：0.10％以下，Ni：0.20〜0.80％，Nb：0.005〜0.030％，Ti：0.005〜0.030％，N：0.0070％以下，Al：0.005〜0.060％ 和杂质，淬透性指数Pcm为0.22％以下，Cu + Cr + Ni为0.4〜1.5％，Nb + Mo + V为0.05％以下。 该管的纵向屈服强度至少为480MPa，屈服拉伸比至多为85％，热影响区的夏比吸收能量在-40℃下至少为40J。

公开(公告)号：US07770428B2

公开(公告)日：2010-08-10

申请号：US12318882

申请日：2009-01-12

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

IPC分类号： B21D9/00

CPC分类号： B21C37/08 ,  B23K33/006 ,  B23K2101/06 ,  B23K2103/04 ,  C21D9/08 ,  C21D9/50 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： A high-strength hot bend pipe which has a balance between an excellent strength of at least X70 grade and toughness and which has excellent tensile properties and a weld metal with excellent low temperature toughness is manufactured. A UOE steel pipe having a base metal with a composition of C: 0.03-0.12%, Si: 0.05-0.50%, Mn: 1.4-2.2%, S: at most 0.01%, Al: at most 0.06%, N: at most 0.008%, and a remainder of Fe and impurities, with the carbon equivalent (Ceq) being at most 0.36% and the weld cracking parameter (Pcm) being at most 0.22%, and having a weld metal with a weld cracking parameter (Pcm) of at most 0.28%, a B content of at most 5 ppm, and an O content of at most 280 ppm is heated to a temperature range of 900-1100° C. and subjected to bending, and then is immediately cooled to a temperature range of 300° C. or lower at a cooling rate of at least 3° C./sec, and then is tempered in a temperature range of 300-500° C.

摘要翻译： 制造具有至少X70等级的优异强度和具有优异的拉伸性能的优异强度与具有优异的低温韧性的焊接金属之间的平衡的高强度热弯管。 具有组成为C：0.03〜0.12％，Si：0.05〜0.50％，Mn：1.4〜2.2％，S：0.01％以下，Al：0.06％以下的贱金属的UOE钢管，N： 最多0.008％，余量为Fe和杂质，碳当量（Ceq）最大为0.36％，焊接裂纹参数（Pcm）为0.22％以下，具有焊缝裂纹参数（Pcm ）为0.28％以下，B含量为5ppm以下，O含量为280ppm以下，加热到900〜1100℃的温度范围，进行弯曲，然后立即冷却至 温度范围为300℃以下，冷却速度为3℃/秒以上，然后在300-500℃的温度范围内回火。

公开(公告)号：US20070240794A1

公开(公告)日：2007-10-18

申请号：US11598022

申请日：2006-11-13

申请人： Nobuaki Takahashi ,  Mitsuru Miura ,  Akio Yamamoto

发明人： Nobuaki Takahashi ,  Mitsuru Miura ,  Akio Yamamoto

IPC分类号： C22C38/00

CPC分类号： C21D8/0226 ,  B21C37/08 ,  C21D8/10 ,  C22C38/02 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58

摘要： A UOE steel pipe for use in linepipe having an ultrahigh strength in the circumferential direction of the pipe of at least 750 MPa and at most 900 MPa and having improved toughness in the base metal and weld heat affected zone along with improved joint fracture properties and good circumferential weldability is manufactured from a hot-rolled steel plate having a composition comprising, in mass percent, C: 0.03-0.08%, Mn: 1.70-2.2%, S: at most 0.0020%, Ti: 0.005-0.025%, N: at most 0.0050% and having a carbon equivalent (Ceq) as defined below of at least 0.50% and a weld cracking parameter (Pcm) as defined below of at most 0.24% wherein the temperature at the completion of water cooling after hot rolling is 350° C. or higher: Ceq=C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15, Pcm=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+B.

摘要翻译： 用于管道圆周方向上超高强度至少为750MPa且至多900MPa的线管的UOE钢管，并且在贱金属和焊接热影响区域中具有改善的韧性以及改善的接头断裂性能和良好 圆周焊接性由具有质量％C：0.03〜0.08％，Mn：1.70〜2.2％，S：0.002％以下，Ti：0.005〜0.025％，N： 至多0.0050％，并且具有如下定义的至少0.50％的碳当量（Ceq）和如下定义的至多0.24％的焊接裂纹参数（Pcm），其中热轧后水冷却完成时的温度为350℃ Ce = C + Mn / 6 +（Cr + Mo + V）/ 5 +（Cu + Ni） ）/ 15，<？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> Pcm = C + Si / 30 + Mn / 20 + Cu / 20 + Ni / 60 + Cr / 20 + Mo / 15 + V /10+B.

公开(公告)号：US07780800B2

公开(公告)日：2010-08-24

申请号：US11819912

申请日：2007-06-29

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

IPC分类号： C21D8/10 ,  C21D9/08

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/10 ,  C21D9/085 ,  C21D9/50 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10S148/909

摘要： A bent pipe corresponding to at least API X100 grade and having a base metal with high strength and toughness and a weld metal with high toughness is provided. A steel plate prepared by cooling after hot rolling at a cooling rate at the central portion in the plate thickness direction of at most 5° C. per second at 700-500° C. is formed into a bend mother pipe, which is then heated to 900-1100° C. and subjected to bending, then it is cooled to a temperature of at most 300° C. at a cooling rate in the central portion of the thickness direction of at least 5° C. per second at 700-500° C., after which it is tempered at 300-500° C.

摘要翻译： 提供对应于至少API X100等级并具有高强度和韧性的母材和具有高韧性的焊接金属的弯管。 通过在700-500℃下以板状厚度方向的中央部的冷却速度以每秒5℃以上的冷却速度冷却而制成的钢板被形成为弯曲母管，然后将其加热 至900-1100℃，然后进行弯曲，然后在厚度方向的中心部分的冷却速度为700℃以上至少为5℃/秒的温度下， 500℃，然后在300-500℃下回火

公开(公告)号：US20080283160A1

公开(公告)日：2008-11-20

申请号：US11819912

申请日：2007-06-29

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

IPC分类号： C21D9/08 ,  C22C38/00

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/10 ,  C21D9/085 ,  C21D9/50 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10S148/909

摘要： A bent pipe corresponding to at least API X100 grade and having a base metal with high strength and toughness and a weld metal with high toughness is provided. A steel plate prepared by cooling after hot rolling at a cooling rate at the central portion in the plate thickness direction of at most 5° C. per second at 700-500° C. is formed into a bend mother pipe, which is then heated to 900-1100° C. and subjected to bending, then it is cooled to a temperature of at most 300° C. at a cooling rate in the central portion of the thickness direction of at least 5° C. per second at 700-500° C., after which it is tempered at 300-500° C.

摘要翻译： 提供对应于至少API X100等级并具有高强度和韧性的母材和具有高韧性的焊接金属的弯管。 通过在700-500℃下以板状厚度方向的中央部的冷却速度以每秒5℃以上的冷却速度冷却而制成的钢板被形成为弯曲母管，然后将其加热 至900-1100℃，然后进行弯曲，然后在厚度方向的中心部分的冷却速度为700℃以上至少为5℃/秒的温度下， 500℃，然后在300-500℃下回火

公开(公告)号：US06953508B2

公开(公告)日：2005-10-11

申请号：US10334717

申请日：2003-01-02

申请人： Tomoaki Ikeda ,  Akio Yamamoto ,  Shigemichi Yamauchi ,  Nobuaki Takahashi ,  Masahiko Hamada

发明人： Tomoaki Ikeda ,  Akio Yamamoto ,  Shigemichi Yamauchi ,  Nobuaki Takahashi ,  Masahiko Hamada

IPC分类号： B23K9/18 ,  C21D1/84 ,  C21D9/50 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54 ,  C22C38/58 ,  C22C38/02 ,  C22C38/06 ,  C22C38/14

CPC分类号： C22C38/44 ,  B23K9/18 ,  C21D1/84 ,  C21D9/505 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54 ,  C22C38/58

摘要： A welding method includes performing welding to form a weld metal consisting essentially of, in mass %, C: 0.01-0.15%,Si: 0.02-0.6%,Mn: 0.6-3.0%, Al: 0.004-0.08%,Ti: 0.003-0.03%,B: at most 0.005%, Cu: 0-1.2%,Ni: 0-3%,Cr: 0-1.2%, Mo: 0-2%,V: 0-0.05%,Nb: 0-0.05%, and a remainder of Fe and unavoidable impurities. The amounts of impurities are P: at most 0.03%, S: at most 0.03%, N: at most 0.01%, Ca or Mg: at most 0.005%. The value of Pcm expressed by the following Equation (3) is in the range of 0.23-0.35%, and the time T until the weld metal is cooled to 100° C. after welding satisfies the following Equation (1): T(seconds)≧exp(7.0×Pw+4.66)  Equation (1) Pw=Pcm+HD/60  Equation (2) Pcm(mass %)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B  Equation (3) HD [ml/100 g]: amount of hydrogen in the weld metal immediately after welding.

公开(公告)号：US20090199612A1

公开(公告)日：2009-08-13

申请号：US12318882

申请日：2009-01-12

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

IPC分类号： B21D9/00 ,  B21D9/05

CPC分类号： B21C37/08 ,  B23K33/006 ,  B23K2101/06 ,  B23K2103/04 ,  C21D9/08 ,  C21D9/50 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： A high-strength hot bend pipe which has a balance between an excellent strength of at least X70 grade and toughness and which has excellent tensile properties and a weld metal with excellent low temperature toughness is manufactured. A UOE steel pipe having a base metal with a composition of C: 0.03-0.12%, Si: 0.05-0.50%, Mn: 1.4-2.2%, S: at most 0.01%, Al: at most 0.06%, N: at most 0.008%, and a remainder of Fe and impurities, with the carbon equivalent (Ceq) being at most 0.36% and the weld cracking parameter (Pcm) being at most 0.22%, and having a weld metal with a weld cracking parameter (Pcm) of at most 0.28%, a B content of at most 5 ppm, and an O content of at most 280 ppm is heated to a temperature range of 900-1100° C. and subjected to bending, and then is immediately cooled to a temperature range of 300° C. or lower at a cooling rate of at least 3° C./sec, and then is tempered in a temperature range of 300-500° C.

摘要翻译： 制造具有至少X70等级的优异强度和具有优异的拉伸性能的优异强度与具有优异的低温韧性的焊接金属之间的平衡的高强度热弯管。 具有组成为C：0.03〜0.12％，Si：0.05〜0.50％，Mn：1.4〜2.2％，S：0.01％以下，Al：0.06％以下的贱金属的UOE钢管，N： 最多0.008％，余量为Fe和杂质，碳当量（Ceq）最大为0.36％，焊接裂纹参数（Pcm）为0.22％以下，具有焊缝裂纹参数（Pcm ）为0.28％以下，B含量为5ppm以下，O含量为280ppm以下，加热到900〜1100℃的温度范围，进行弯曲，然后立即冷却至 温度范围为300℃以下，冷却速度为3℃/秒以上，然后在300-500℃的温度范围内回火。