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1. 发明公开

EP2264203A1 HIGH-STRENGTH UOE STEEL PIPE EXCELLENT IN EARTHQUAKE-PROOF PERFORMANCE AND IN LOW-TEMPERATURE TOUGHNESS OF WELD HEAT-AFFECTED ZONE 审中-公开
标题翻译：具有优良的抗地震性能特点及焊接热影响下面积优异的低温强度高强度UOE钢管
公开(公告)号：EP2264203A1
公开(公告)日：2010-12-22
申请号：EP09724095.6
申请日：2009-03-24
申请人： Sumitomo Metal Industries, Ltd.
发明人： TAKAHASHI, Nobuaki , YAMAMOTO, Akio , HAMADA, Masahiko
IPC分类号： C22C38/00 , C22C38/16 , C22C38/58
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：其具有优异的可变形性，并在其焊接热影响区具有优良的低温韧性和所有的高强度UOE钢管，其适合用于在极寒冷地区或在易发生地震的区域安装在永久冻土管线的使用，对于实施例，提供了一种，该UOE钢管具有钢组合物由C的本质：0.03 - 0.07％，以下，Si：0.05 - 0.50％以下，Mn：1.6 - 2.2％，P：最多0.020％，S：最多0.003％以下，Cu：12:20 - 0.60％以下，Cr：最多12：10％以下，Ni：0:20 - 0.80％以下，Nb：0005-0030％以下，Ti：0005-0030％，N：0.0070％以下，Al：从0005至0060％，以及铁的剩余部分和杂质，淬透性指数Pcm为0.22％成Cu +的Cr +的Ni 0.4 - 1.5％以下，Nb +沫+ V为至多0.05％。管具有至少480兆帕的具有至多85％，和屈服比的却贝纵向方向上的屈服强度在至少40 J.的-40°C吸收的热影响区的能量

2. 发明公开

EP2147986A1 BEND PIPE AND PROCESS FOR MANUFACTURING THE SAME 有权
标题翻译： BIEGUNGSROHR UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP2147986A1
公开(公告)日：2010-01-27
申请号：EP07767797.9
申请日：2007-06-28
申请人： Sumitomo Metal Industries, Ltd.
发明人： TAKAHASHI, Nobuaki , YAMAMOTO, Akio , HAMADA, Masahiko
IPC分类号： C22C38/58 , C21D8/10 , 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等级并且具有高强度和韧性的贱金属和具有高韧性的焊接金属的弯管。在700〜500℃下，以厚度方向的中心部，冷却速度为5℃以下，以700℃〜500℃的速度冷却制成的钢板，形成为弯曲母管，然后将其加热至900℃ 在1100℃下进行弯曲，然后在700-500℃下，以至少5℃/秒的厚度方向的中心部分的冷却速度在700-500℃之后，以至少300℃的温度冷却至温度它在300-500℃下回火。

3. 发明公开

EP1860204A1 HIGH TENSION STEEL PLATE, WELDED STEEL PIPE AND METHOD FOR PRODUCTION THEREOF 有权
标题翻译：大包钢板焊接钢管及其制造方法
公开(公告)号：EP1860204A1
公开(公告)日：2007-11-28
申请号：EP06715372.6
申请日：2006-03-08
申请人： SUMITOMO METAL INDUSTRIES, LTD.
发明人： TAKAHASHI, Nobuaki , HAMADA, Masahiko , OKAGUCHI, Shuji , YAMANAKA, Akihiro , SETA, Ichirou
IPC分类号： C22C38/00 , B21B3/00 , B21C37/08 , B22D11/00 , B22D11/115 , B22D11/128 , C21D8/02 , C22C38/58
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 1/4 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.

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