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1.发明授权公开(公告)号：US06953508B2
公开(公告)日：2005-10-11
申请号：US10334717
申请日：2003-01-02
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.
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公开(公告)号：US06948649B2
公开(公告)日：2005-09-27
申请号：US10247373
申请日：2002-09-20
CPC分类号： C21D7/12 , B21C37/0811 , B21C37/30 , C21D2211/002 , C21D2211/008
摘要： The high yield ratio problem intrinsic in high-strength steel pipes is solved and a method of producing a steel pipe, while securing the pipe roundness is provided. A steel pipe produced from a steel plate by forming and welding is subjected to 0.3 to 1.2% of expansion and then to 0.1 to 1.0% of reduction. The steel pipe produced by this method has a structure in which martensite and/or bainite accounts for more than 80% as expressed in terms of area percentage, and has a yield strength of not lower than 551 MPa and a yield ratio of not higher than 93%. The pipe reduction is desirably carried out at a lower work ratio as compared with the pipe expansion.
摘要翻译： 解决了高强度钢管固有的高屈服比问题，同时确保了管道圆度的确保方法。 通过成形和焊接由钢板制成的钢管的膨胀率为0.3〜1.2％，然后为0.1〜1.0％。 通过该方法制造的钢管具有以面积百分比表示的马氏体和/或贝氏体占80％以上的结构，屈服强度不低于551MPa，屈服比不高于 93％。 与管膨胀相比，希望以较低的加工比进行管道的还原。
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3.发明申请High-Strength UOE Steel Pipe Excellent in Deformability and Low-Temperature Toughness of Heat Affected Zone 审中-公开高强度UOE钢管，受热影响区的变形性和低温韧性优异公开(公告)号：US20110070457A1
公开(公告)日：2011-03-24
申请号：US12891276
申请日：2010-09-27
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。
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公开(公告)号：US20090199612A1
公开(公告)日：2009-08-13
申请号：US12318882
申请日：2009-01-12
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。
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公开(公告)号：US07770428B2
公开(公告)日：2010-08-10
申请号：US12318882
申请日：2009-01-12
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。
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公开(公告)号：US07780800B2
公开(公告)日：2010-08-24
申请号：US11819912
申请日：2007-06-29
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
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公开(公告)号：US20080283160A1
公开(公告)日：2008-11-20
申请号：US11819912
申请日：2007-06-29
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
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8.发明授权High-tensile steel plate, welded steel pipe or tube, and methods of manufacturing thereof 有权高强度钢板，焊接钢管或管，及其制造方法公开(公告)号：US08177925B2
公开(公告)日：2012-05-15
申请号：US11886423
申请日：2006-03-08
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。
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公开(公告)号：US20090022619A1
公开(公告)日：2009-01-22
申请号：US12232196
申请日：2008-09-12
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。
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10.发明申请High-Tensile Steel Plate, Welded Steel Pipe or Tube, and Methods of Manufacturing Thereof 有权高拉力钢板，焊接钢管或管材及其制造方法公开(公告)号：US20090297872A1
公开(公告)日：2009-12-03
申请号：US11886423
申请日：2006-03-08
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。
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