公开(公告)号：US20090022619A1

公开(公告)日：2009-01-22

申请号：US12232196

申请日：2008-09-12

申请人： Masahiko Hamada ,  Takahiro Kamo ,  Shuji Okaguchi ,  Nobuaki Takahashi ,  Tetsuya Fukuba

发明人： Masahiko Hamada ,  Takahiro Kamo ,  Shuji Okaguchi ,  Nobuaki Takahashi ,  Tetsuya Fukuba

IPC分类号： C22C38/42 ,  C22C38/04 ,  C22C38/60

CPC分类号： C22C38/12 ,  B23K35/3053 ,  B23K35/36 ,  B23K35/362 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16

摘要： A steel plate for submerged arc welding having good low temperature toughness at a fusion line vicinity part and a boundary with the base material in HAZ as well as at the base material and the weld metal is provided. The steel plate for submerged arc welding according to the invention contains, by mass, 0.03% to 0.09% C, 1.5% to 2.5% Mn, 0.005% to 0.025% Nb, 0.005% to 0.02% Ti, 0.01% to 0.06% Al, at most 0.0005% B, 0.001% to 0.008% N, at most 0.015% P, at most 0.015% S, and at most 0.006% O, and the balance consists of Fe and impurities. Therefore, the steel plate according to the present invention has good low temperature toughness not only at the fusion line vicinity part and the boundary with a base material in the HAZ but also in the base material and weld metal.

摘要翻译： 提供了一种在熔接线附近部分具有良好的低温韧性并且与HAZ中的基材以及基体材料和焊接金属的边界具有良好低温韧性的钢板。 根据本发明的埋弧焊用钢板以质量计含有0.03％〜0.09％的C，1.5％〜2.5％的Mn，0.005〜0.025％的Nb，0.005〜0.02％的Ti，0.01〜0.06％的Al ，至多0.0005％B，0.001％至0.008％N，至多0.015％P，至多0.015％S和至多0.006％O，余量由Fe和杂质组成。 因此，根据本发明的钢板不仅在熔接线附近部分和与HAZ中的基材的边界以及基材和焊接金属中具有良好的低温韧性。

公开(公告)号：US20090297872A1

公开(公告)日：2009-12-03

申请号：US11886423

申请日：2006-03-08

申请人： Nobuaki Takahashi ,  Masahiko Hamada ,  Shuji Okaguchi ,  Akihiro Yamanaka ,  Ichirou Seta

发明人： Nobuaki Takahashi ,  Masahiko Hamada ,  Shuji Okaguchi ,  Akihiro Yamanaka ,  Ichirou Seta

IPC分类号： B32B1/08 ,  C22C38/20 ,  C22C38/08 ,  C21D11/00 ,  C22C38/04 ,  C22C38/58 ,  B22D27/02

CPC分类号： C21D8/0226 ,  B21B3/02 ,  B21C37/08 ,  C21D8/10 ,  C21D9/08 ,  C21D9/50 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/58 ,  Y10S148/908 ,  Y10T428/12292

摘要： In a high-tensile steel plate according to the invention, the carbon equivalent Pcm represented in Expression (1) is from 0.180% to 0.220%, the surface hardness is a Vicker's hardness of 285 or less, the ratio of a Martensite Austenite constituent in the surface layer is not more than 10%, the ratio of a mixed structure of ferrite and bainite inside beyond the surface layer is not less than 90%, the ratio of the bainite in the mixed structure is not less than 10%, the thickness of the lath of bainite is not more than 1 μm, the length of the lath is not more than 20 μm, and the segregation ratio as the ratio of the Mn concentration in the center segregation part relative to the Mn concentration at a part in a depth equal to ¼ of the thickness of the plate from the surface is not more than 1.3. Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B . . . (1) where the element symbols in Expression (1) represent the % by mass of the respective elements. In this way, the high-tensile steel plate according to the invention has a yield strength of at least 551 MPa and a tensile strength of at least 620 MPa as well as high toughness, high propagating shear fracture and high weldability.

摘要翻译： 在本发明的高强度钢板中，式（1）所示的碳当量Pcm为0.180〜0.220％，表面硬度为维氏硬度为285以下，马氏体奥氏体成分 表面层不超过10％，铁素体和贝氏体在表面层之外的混合结构的比例不小于90％，混合结构中的贝氏体比不小于10％，厚度 贝氏体的板条不大于1μm，板条的长度不超过20μm，并且作为中心偏析部分中的Mn浓度相对于在中央偏析部分的Mn浓度的比率的偏析比 与表面厚度相当的1/4的厚度不大于1.3。 Pcm = C + Si / 30 +（Mn + Cu + Cr）/ 20 + Ni / 60 + Mo / 15 + V / 10 + 5B。 。 。 （1）其中，式（1）中的元素符号表示各元素的质量％。 这样，根据本发明的高强度钢板的屈服强度至少为551MPa，拉伸强度为至少620MPa，韧性高，传播剪切断裂高，焊接性高。

公开(公告)号：US08177925B2

公开(公告)日：2012-05-15

申请号：US11886423

申请日：2006-03-08

申请人： Nobuaki Takahashi ,  Masahiko Hamada ,  Shuji Okaguchi ,  Akihiro Yamanaka ,  Ichirou Seta

发明人： Nobuaki Takahashi ,  Masahiko Hamada ,  Shuji Okaguchi ,  Akihiro Yamanaka ,  Ichirou Seta

IPC分类号： C22C38/14 ,  C22C38/12 ,  C22C38/04 ,  C22C38/48 ,  C22C38/50 ,  C21D8/00 ,  C21D8/10 ,  C21D9/08

CPC分类号： C21D8/0226 ,  B21B3/02 ,  B21C37/08 ,  C21D8/10 ,  C21D9/08 ,  C21D9/50 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/58 ,  Y10S148/908 ,  Y10T428/12292

摘要： In a high-tensile steel plate according to the invention, the carbon equivalent Pcm represented in Expression (1) is from 0.180% to 0.220%, the surface hardness is a Vicker's hardness of 285 or less, the ratio of a Martensite Austenite constituent in the surface layer is not more than 10%, the ratio of a mixed structure of ferrite and bainite inside beyond the surface layer is not less than 90%, the ratio of the bainite in the mixed structure is not less than 10%, the thickness of the lath of bainite is not more than 1 μm, the length of the lath is not more than 20 μm, and the segregation ratio as the ratio of the Mn concentration in the center segregation part relative to the Mn concentration at a part in a depth equal to ¼ of the thickness of the plate from the surface is not more than 1.3. Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B . . . (1) where the element symbols in Expression (1) represent the % by mass of the respective elements. In this way, the high-tensile steel plate according to the invention has a yield strength of at least 551 MPa and a tensile strength of at least 620 MPa as well as high toughness, high propagating shear fracture and high weldability.

摘要翻译： 在本发明的高强度钢板中，式（1）所示的碳当量Pcm为0.180〜0.220％，表面硬度为维氏硬度为285以下，马氏体奥氏体成分 表面层不超过10％，铁素体和贝氏体在表面层之外的混合结构的比例不小于90％，混合结构中的贝氏体比不小于10％，厚度 贝氏体的板条的长度不超过1μm，板条的长度不大于20μm，偏析中心偏析部分的Mn浓度相对于一部分的Mn浓度的偏析比 与表面厚度相当的1/4的厚度不大于1.3。 Pcm = C + Si / 30 +（Mn + Cu + Cr）/ 20 + Ni / 60 + Mo / 15 + V / 10 + 5B。 。 。 （1）其中，式（1）中的元素符号表示各元素的质量％。 这样，根据本发明的高强度钢板的屈服强度至少为551MPa，拉伸强度为至少620MPa，韧性高，传播剪切断裂高，焊接性高。

公开(公告)号：US20070289655A1

公开(公告)日：2007-12-20

申请号：US11797103

申请日：2007-05-01

申请人： Masahiko Hamada ,  Shuji Okaguchi ,  Yuichi Komizo

发明人： Masahiko Hamada ,  Shuji Okaguchi ,  Yuichi Komizo

IPC分类号： F16L9/02

CPC分类号： C22C38/44 ,  B23K35/3053 ,  B23K35/3066 ,  B23K35/3093 ,  B23K35/362 ,  C22C38/002 ,  C22C38/02 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： A high-strength welded steel pipe having a pipe base metal with a tensile strength of at least 760 MPa and which prevents the occurrence of transverse cracks in weld metal without carrying out preheating or postheating has a seam weld having weld metal with a tensile strength of at least 780 MPa and an average grain diameter of prior austenite in the weld metal of an inner seam weld of at least 90 μm and at most 150 μm. The pipe base metal contains C: 0.02-0.12%, Si: 0.01-0.50%, Mn: 0.4-2.5%, P: at most 0.015%, S: at most 0.003%, Nb: 0.005-0.10%, Al: 0.005-0.06%, and optionally at least one of Cu, Ni, Cr, Mo, V, and B, and the inner seam weld metal contains C: 0.02-0.12%, Si: 0.05-0.50%, Mn: 0.4-2.5%, Cr, Mo, and Ni: 0.1-3.0% each, Ti: 0.005-0.050%, and Al: 0.005-0.050%.

摘要翻译： 一种具有抗拉强度至少为760MPa并且防止在焊接金属中发生横向裂纹而不进行预热或后加热的管状母材的高强度焊接钢管具有焊缝，其焊缝金属的拉伸强度为 至少780MPa，内焊缝的焊接金属中的前奥氏体的平均粒径至少为90μm，至多为150μm。 管底金属含有C：0.02〜0.12％，Si：0.01-0.50％，Mn：0.4〜2.5％，P：0.015％以下，S：0.003％以下，Nb：0.005〜0.10％，Al：0.005 -0.06％，以及Cu，Ni，Cr，Mo，V和B中的至少一种，内缝焊缝金属含有C：0.02〜0.12％，Si：0.05〜0.50％，Mn：0.4〜2.5％ ，Cr，Mo和Ni：各自为0.1〜3.0％，Ti：0.005〜0.050％，Al：0.005〜0.050％。

公开(公告)号：US06245290B1

公开(公告)日：2001-06-12

申请号：US09380254

申请日：1999-08-25

申请人： Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Michael J. Luton ,  Clifford W. Petersen ,  Kazuki Fujiwara ,  Shuji Okaguchi ,  Masahiko Hamada ,  Yu-ichi Komizo

发明人： Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Michael J. Luton ,  Clifford W. Petersen ,  Kazuki Fujiwara ,  Shuji Okaguchi ,  Masahiko Hamada ,  Yu-ichi Komizo

IPC分类号： C21D800

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

摘要： A high-tensile-strength steel having excellent toughness throughout its thickness, excellent properties at welded joints, and a tensile strength (TS) of at least about 900 MPa (130 ksi), and a method for making such steel, are provided. Steels according to this invention preferably have the following composition based on % by weight: carbon (C): 0.02% to 0.1%; silicon (Si): not greater than 0.6%; manganese (Mn): 0.2% to 2.5%; nickel (Ni): 0.2% to 1.2%; niobium (Nb): 0.01% to 0.1%; titanium (Ti): 0.005% to 0.03%; aluminum (Al): not greater than 0.1%; nitrogen (N): 0.001% to 0.006%; copper (Cu): 0% to 0.6%; chromium (Cr): 0% to 0.8%; molybdenum (Mo): 0% to 0.6%; vanadium (V): 0% to 0.1%; boron (B): 0% to 0.0025%; and calcium (Ca): 0% to 0.006%. The value of Vs as defined by Vs=C+(Mn/5)+5P−(Ni/10)−(Mo/15)+(Cu/10) is 0.15 to 0.42. P and S among impurities are contained in an amount of not greater than 0.015% and not greater than 0.003%, respectively. The carbide size in the steel is not greater than 5 microns in the longitudinal direction.

摘要翻译： 提供了其整个厚度具有优异的韧性，在焊接接头处具有优异性能以及至少约900MPa（130ksi）的拉伸强度（TS））的高强度钢及其制造方法。 根据本发明的钢优选具有以重量％计的以下组成：碳（C）：0.02％至0.1％; 硅（Si）：不大于0.6％; 锰（Mn）：0.2〜2.5％ 镍（Ni）：0.2〜1.2％ 铌（Nb）：0.01〜0.1％ 钛（Ti）：0.005〜0.03％ 铝（Al）：不大于0.1％; 氮（N）：0.001〜0.006％ 铜（Cu）：0〜0.6％ 铬（Cr）：0〜0.8％ 钼（Mo）：0〜0.6％ 钒（V）：0％至0.1％; 硼（B）：0〜0.0025％ 和钙（Ca）：0〜0.006％。 由Vs = C +（Mn / 5）+ 5P-（Ni / 10） - （Mo / 15）+（Cu / 10）定义的Vs的值为0.15〜0.42。 杂质中的P和S的含量分别不大于0.015％且不大于0.003％。 钢中的碳化物尺寸在纵向上不大于5微米。

公开(公告)号：US06183573B2

公开(公告)日：2001-02-06

申请号：US09482527

申请日：2000-01-14

申请人： Kazuki Fujiwara ,  Shuji Okaguchi ,  Masahiko Hamada ,  Yu-ichi Komizo

发明人： Kazuki Fujiwara ,  Shuji Okaguchi ,  Masahiko Hamada ,  Yu-ichi Komizo

IPC分类号： C22C3808

CPC分类号： C22C38/12 ,  C21D8/0205 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/04 ,  C22C38/08

摘要： High-tensile-strength steel having excellent arrestability and a TS of not less than 900 MPa, as well as a method of manufacturing the same. The steel of the invention has the following composition (% by weight): C: 0.02% to 0.1%; Si: not greater than 0.6%; Mn: 0.2% to 2.5%; Ni: greater than 1.2% but not greater than 2.5%; Nb: 0.01% to 0.1%; Ti: 0.005% to 0.03%; N: 0.001% to 0.006%; Al: not greater than 0.1%; and optional elements. Ceq of the B-free steel is 0.53-0.7%, and Ceq of the B-bearing steel is 0.4-0.58%. The microstructure of the steel may be a mixed structure of martensite (M) and lower bainite (LB) occupying at least 90 vol. % in the microstructure, LB occupying at least 2 vol. % in the mixed structure, and the aspect ratio of prior austenite grains is not less than 3.

摘要翻译： 具有优异的阻滞性和TS不低于900MPa的高强度钢及其制造方法。 本发明的钢具有以下组成（重量％）：C：0.02〜0.1％ Si：不大于0.6％; Mn：0.2〜2.5％ Ni：大于1.2％但不大于2.5％; Nb：0.01〜0.1％ Ti：0.005〜0.03％ N：0.001〜0.006％ Al：不大于0.1％; 和可选元素。 B型钢的Ceq为0.53〜0.7％，B轴钢的Ceq为0.4〜0.58％。 钢的微观结构可以是马氏体（M）和下部贝氏体（LB）的混合结构，其占据至少90体积％。 微观结构中的％，LB占至少2体积。 混合结构中的％，前奥氏体晶粒的纵横比不小于3。

公开(公告)号：US6045630A

公开(公告)日：2000-04-04

申请号：US28574

申请日：1998-02-24

申请人： Kazuki Fujiwara ,  Shuji Okaguchi ,  Masahiko Hamada ,  Yu-ichi Komizo

发明人： Kazuki Fujiwara ,  Shuji Okaguchi ,  Masahiko Hamada ,  Yu-ichi Komizo

IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C21D8/00 ,  C22C38/48

CPC分类号： C22C38/12 ,  C21D8/0205 ,  C21D8/0226 ,  C22C38/001 ,  C22C38/04 ,  C22C38/08 ,  C21D2211/002 ,  C21D2211/008

摘要： High-tensile-strength steel having excellent arrestability and a TS of not less than 900 MPa, as well as a method of manufacturing the same. The steel of the invention has the following composition (% by weight): C: 0.02% to 0.1%; Si: not greater than 0.6%; Mn: 0.2% to 2.5%; Ni: greater than 1.2% but not greater than 2.5%; Nb: 0.01% to 0.1%; Ti: 0.005% to 0.03%; N: 0.001% to 0.006%; Al: not greater than 0.1%; and optional elements. Ceq of the B-free steel is 0.53-0.7%, and Ceq of the B-bearing steel is 0.4-0.58%. The microstructure of the steel may be a mixed structure of martensite (M) and lower bainite (LB) occupying at least 90 vol. % in the microstructure, LB occupying at least 2 vol. % in the mixed structure, and the aspect ratio of prior austenite grains is not less than 3.

摘要翻译： 具有优异的阻滞性和TS不低于900MPa的高强度钢及其制造方法。 本发明的钢具有以下组成（重量％）：C：0.02〜0.1％ Si：不大于0.6％; Mn：0.2〜2.5％ Ni：大于1.2％但不大于2.5％; Nb：0.01〜0.1％ Ti：0.005〜0.03％ N：0.001〜0.006％ Al：不大于0.1％; 和可选元素。 B型钢的Ceq为0.53〜0.7％，B轴钢的Ceq为0.4〜0.58％。 钢的微观结构可以是马氏体（M）和下部贝氏体（LB）的混合结构，其占据至少90体积％。 微观结构中的％，LB占至少2体积。 混合结构中的％，前奥氏体晶粒的纵横比不小于3。