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1. 发明公开

EP2264205A4 HIGH-STRENGTH STEEL PLATE EXCELLENT IN LOW-TEMPERATURE TOUGHNESS, STEEL PIPE, AND PROCESSES FOR PRODUCTION OF BOTH 有权转让
标题翻译： HOCHFESTE STAHLPLATTE MIT HERVORRAGENDER NIEDERTEMPERATURFESTIGKEIT，STAHLROHR UND HERSTELLUNGSVERFAHRENFÜRDIESE
公开(公告)号：EP2264205A4
公开(公告)日：2017-05-10
申请号：EP09730216
申请日：2009-04-07
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： FUJISHIRO TAISHI , SAKAMOTO SHINYA , HARA TAKUYA , ASAHI HITOSHI
IPC分类号： C22C38/00 , B21C37/08 , C21D8/02 , C22C38/14 , C22C38/58
CPC分类号： C21D7/12 , B21C37/08 , C21D8/0231 , C21D8/0273 , C21D8/10 , C21D9/08 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58 , Y10T428/12292 , Y10T428/12653 , Y10T428/12958 , Y10T428/12965 , Y10T428/12972
摘要： The present invention provides high strength steel plate with excellent low temperature toughness, high strength steel pipe using this as a base metal, and methods of production of the same. The steel plate of the present invention contains Mo: 0.05 to 1.00% and B: 0.0003 to 0.0100%, has a Ceq of 0.30 to 0.53, has a Pcm of 0.10 to 0.20, and has a metal structure which has an area percentage of polygonal ferrite of 20 to 90% and has a balance of a hard phase comprised of one or both of bainite and martensite. To obtain this steel plate, strain-introducing rolling is performed with a start temperature of not more than Ar 3 +60°C, an end temperature of Ar 3 or more, and a reduction ratio of 1.5 or more, then the plate is air-cooled and then acceleratedly cooled from Ar 3 -100°C to Ar 3 -10°C in temperature by 10°C/s or more.
摘要翻译：本发明提供具有优异的低温韧性的高强度钢板，以其为基体金属的高强度钢管及其制造方法。本发明的钢板含有Mo：0.05〜1.00％，B：0.0003〜0.0100％，Ceq为0.30〜0.53，Pcm为0.10〜0.20，具有多边形面积率的金属组织铁素体为20〜90％，余量由贝氏体和马氏体中的一者或两者构成的硬质相。为了得到该钢板，以Ar 3 + 60℃以下的起始温度，Ar 3以上的终点温度，1.5以上的压下率进行应变导入轧制，冷却，然后从Ar 3 -100℃加速冷却至Ar 3 -10℃，温度为10℃/ s或更高。

2. 发明公开

EP3026140A4 STEEL PLATE FOR LINE PIPE, AND LINE PIPE 有权转让
标题翻译：莱斯尼格鲁姆（LEITUNGSROHR）
公开(公告)号：EP3026140A4
公开(公告)日：2017-03-08
申请号：EP14829550
申请日：2014-07-23
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： SHINOHARA YASUHIRO , HARA TAKUYA , FUJISHIRO TAISHI , DOI NAOKI , AYUKAWA NAOSHI , YAMASHITA EIICHI
IPC分类号： C22C38/00 , B21B1/38 , B21B3/00 , C21D8/02 , C22C38/14 , C22C38/58
CPC分类号： C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/58
摘要： A steel plate for a line pipe, the steel plate having a plate thickness of 25 mm or more comprising in terms of mass%: 0.040 to 0.080% of C, 0.05 to 0.40% of Si, 1.60 to 2.00% of Mn, 0.020% or less of P, 0.0025% or less of S, 0.05 to 0.20% of Mo, 0.0011 to 0.0050% of Ca, 0.060% or less of Al, 0.010 to 0.030% of Nb, 0.008 to 0.020% of Ti, 0.0015 to 0.0060% of N, and 0.0040% or less of O, a remainder consisting of Fe and unavoidable impurities, wherein a content ratio of Ca to S [Ca/S] is from 0.90 to 2.70, and a content ratio of Ti to N [Ti/N] is 2.20 or higher" wherein Ceq, which is defined by the following Formula (1), is from 0.380 to 0.480: Ceq = C+Mn/6+(Ni+Cu)/15+(Cr+Mo+V)/5; and wherein: at a position of 1/4 of the plate thickness, a ferrite fraction (F1) is from 20 to 60% and a remainder is a structure of bainite; at a position of 1/2 of the plate thickness, a ferrite fraction (F2) is from 5 to 60% and a remainder is a structure of bainite or a structure of bainite and martensite; a ratio (F1/F2) of the ferrite fraction (F1) to the ferrite fraction (F2) is from 1.00 to 5.00; at a position of 1/4 of the plate thickness an average grain diameter of ferrite is from 2.0 to 15.0 µm, and at a position of 1/2 of the plate thickness the average grain diameter of ferrite is from 5.0 to 20.0 µm; and the hardness at a position of 1/2 of the plate thickness is 400 Hv or less, and the length of MnS at a position of 1/2 of the plate thickness is 1.00 mm or less.
摘要翻译：一种线管用钢板，所述钢板的板厚为25mm以上，以质量％计含有：0.040〜0.080％的C，0.05〜0.40％的Si，1.60〜2.00％的Mn，0.020％以下，P：0.0025％以下，Mo：0.05〜0.20％，Ca：0.0011〜0.0050％，Al：0.060％以下，Nb：0.010〜0.030％，Ti：0.008〜0.020％，0.0015〜 N为0.0040％以下，余量由Fe和不可避免的杂质构成，Ca与S [Ca / S]的含有比例为0.90〜2.70，Ti与N [Ti / N]为2.20以上“其中由下式（1）定义的Ceq为0.380〜0.480 Ceq = C + Mn / 6 +（Ni + Cu）/ 15 +（Cr + Mo + V ）/ 5;其中：在板厚的1/4的位置处，铁素体部分（F1）为20〜60％，余量为贝氏体结构;在板的1/2的位置厚度，铁素体部分（F2）为5〜60％，余量为贝氏体组织或贝氏体和马氏体组织 ; 铁素体部分（F1）与铁素体部分（F2）的比（F1 / F2）为1.00〜5.00; 在板厚的1/4的位置，铁素体的平均粒径为2.0〜15.0μm，铁素体的平均粒径为5.0〜20.0μm的板厚的1/2的位置，板厚1/2的位置处的硬度为400Hv以下，板厚1/2的位置处的MnS的长度为1.00mm以下。

3. 发明公开

EP2832879A4 HIGH-STRENGTH STEEL PIPE FOR LINE PIPE HAVING EXCELLENT HYDROGEN-INDUCED CRACKING RESISTANCE, HIGH-STRENGTH STEEL PIPE FOR LINE PIPE USING SAME, AND METHOD FOR MANUFACTURING SAME 有权转让
标题翻译：高强度钢管管线管具有优良的耐氢致开裂，高强度钢管管道顺序和方法及其生产
公开(公告)号：EP2832879A4
公开(公告)日：2016-01-13
申请号：EP13768001
申请日：2013-03-29
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： HARA TAKUYA , FUJISHIRO TAISHI , MURAKI TARO , SUZUKI GO
IPC分类号： C22C38/00 , C21D8/02 , C22C38/12 , C22C38/58
CPC分类号： C22C38/001 , C22C38/00 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/40
摘要： Steel pipe for high strength line pipe use excellent in hydrogen induced crack resistance which can prevent cracking at the surface layer of steel pipe even if the ratio of thickness and outside diameter is 0.035 or more, characterized in that it has a predetermined chemical composition, has a maximum hardness of a surface layer region from the topmost surface of two front and back plate surfaces down to depth of 5 mm of 300Hv or less, and has a total fraction of polygonal ferrite and deformed ferrite with an aspect ratio of 3 or more at the surface layer region from the topmost surface of the two front and back plate surfaces down to depth of 5 mm of 0.1 to 20%.

4. 发明公开

EP2532765A4 HIGH-STRENGTH WELDED STEEL PIPE AND METHOD FOR PRODUCING THE SAME 审中-公开
标题翻译： HOCHFESTES GESCHWEISSTES STAHLROHR UND VERFAHREN ZU DESSEN HERSTELLUNG
公开(公告)号：EP2532765A4
公开(公告)日：2017-07-26
申请号：EP11739858
申请日：2011-02-04
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： FUJISHIRO TAISHI , HARA TAKUYA , TERADA YOSHIO , SAKAMOTO SHINYA , ASAHI HITOSHI
IPC分类号： C22C38/00 , B21C37/08 , B23K9/025 , B23K9/18 , B23K9/23 , B23K31/00 , B23K31/02 , B23K35/30 , B23K101/06 , B23K103/04 , C21D8/10 , C21D9/08 , C21D9/50 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/58
CPC分类号： B23K35/3053 , B23K31/027 , B23K2201/06 , B23K2203/04 , C21D8/105 , C21D9/08 , C21D9/50 , C21D2211/002 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/14 , Y10S148/909
摘要： A high-strength welded steel pipe is obtained by welding a seam weld portion of a steel plate that are formed in a pipe shape. In the high-strength welded steel pipe, a base metal of the steel plate includes, by mass%, C: 0.010% to 0.080%, Si: 0.01% to 0.50%, Mn: 0.50% to 2.00%, S: 0.0001% to 0.0050%, Ti: 0.003% to 0.030%, Mo: 0.05% to 1.00%, B: 0.0003% to 0.0100%, O: 0.0001% to 0.0080%, N: 0.006% to 0.0118%, P: limited to 0.050% or less, Al: limited to 0.008% or less, and the balance of Fe and inevitable impurities, Ceq is 0.30 to 0.53, Pcm is 0.10 to 0.20, [N] - [Ti] /3.4 is less than 0.003, the average grain size of the prior ³ grains in heat affected zones in the steel plate is 250 µm or less, and the prior ³ grains include bainite and intragranular bainite.
摘要翻译：高强度焊接钢管通过焊接形成为管状的钢板的焊缝部而得到。在高强度焊接钢管中，钢板的母材以质量％计含有C：0.010〜0.080％，Si：0.01〜0.50％，Mn：0.50〜2.00％，S：0.0001％至0.0050％，Ti：0.003％至0.030％，Mo：0.05％至1.00％，B：0.0003％至0.0100％，O：0.0001％至0.0080％，N：0.006％至0.0118％，P：限于0.050％以下，Al：0.008％以下，余量为Fe和不可避免的杂质，Ceq为0.30〜0.53，Pcm为0.10〜0.20，[N] - [Ti] /3.4不足0.003，平均粒径钢板中热影响区中现有³晶粒的尺寸为250μm或更小，并且现有³晶粒包括贝氏体和粒内贝氏体。

5. 发明公开

EP3042976A4 STEEL SHEET FOR THICK-WALLED HIGH-STRENGTH LINE PIPE HAVING EXCEPTIONAL SOURING RESISTANCE, CRUSH RESISTANCE PROPERTIES, AND LOW-TEMPERATURE DUCTILITY, AND LINE PIPE 有权转让
标题翻译： STAHLBLECHFÜRHOCHFESTES DICKWANDIGES LEITUNGSROHR MITAUSSERGEWÖHNLICHEMAUSSÄERERUNGSWIDERSTAND，QUETSCHFESTIGKEITSEIGENSCHAFTEN UNDDUKTILITÄTBEI NIEDRIGEN TEMPERATUREN SOWIE LEITUNGSROHR
公开(公告)号：EP3042976A4
公开(公告)日：2017-05-10
申请号：EP14840842
申请日：2014-08-29
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： HARA TAKUYA , FUJISHIRO TAISHI , SHINOHARA YASUHIRO , TSURU EIJI
IPC分类号： C22C38/00 , C21D8/02 , C21D8/10 , C21D9/08 , C21D9/14 , C22C38/12 , C22C38/14 , C22C38/58
CPC分类号： C21D9/14 , C21D1/78 , C21D8/0226 , C21D8/0263 , C21D8/105 , C21D2211/002 , C21D2211/005 , C21D2221/10 , C22C38/00 , C22C38/12 , C22C38/14 , C22C38/58
摘要： This invention provides steel plate for thick-gauge high-strength linepipe which is excellent in sour resistance, collapse resistance, and low-temperature toughness and the method for manufacturing the same. Steel plate for thick-gauge high-strength linepipe comprises steel plate having a plate thickness of 25 mm to 45 mm, wherein a microstructure of surface layer portion is restricted to, by area percentage, deformed ferrite: 5% or more and S fe1 % found by the following formula 1a or less and martensite-austenite mixture: 8% or less and has a balance of one or both of polygonal ferrite and bainite, and a microstructure of a mid-thickness portion is restricted to, by area percentage, deformed ferrite: 5% or less, martensite-austenite mixture: 5% or less and has a balance of one or both of acicular ferrite and bainite, and the surface layer portion and mid-thickness portion have average value of effective grain size measured by electron backscatter diffraction of 20 µm or less. €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒS fe1 =0. 6552×T H -4.7826 ···€ƒ€ƒ€ƒ€ƒ€ƒformula 1a where, T H : plate thickness of steel plate for thick-gauge high-strength linepipe
摘要翻译：本发明提供耐酸性，耐崩塌性，低温韧性优异的厚壁高强度管线管用钢板及其制造方法。厚壁高强度管线管用钢板由板厚25〜45mm的钢板构成，表层部的显微组织以面积率计为铁素体5％以上，S fe1％由下式1a或更低时发现，马氏体 - 奥氏体混合物：8％或更低，余量为多边形铁素体和贝氏体中的一种或两种，并且中间厚度部分的显微组织按面积百分比限制变形，铁素体：5％以下，马氏体 - 奥氏体混合
物：5％以下，余量为针状铁素体和贝氏体中的一种或两种，并且表层部分和中厚部分具有由电子测量的有效晶粒尺寸的平均值后向散射衍射为20μm或更小。 S f1 = 0。 6552×T H -4.7826 ......式1a其中，T H：用于厚规格高强度管线管的钢板的板厚

6. 发明公开

EP2799567A4 HIGH STRENGTH STEEL PIPE HAVING EXCELLENT DUCTILITY AND LOW TEMPERATURE TOUGHNESS, HIGH STRENGTH STEEL SHEET, AND METHOD FOR PRODUCING STEEL SHEET 有权转让
标题翻译：具有出色的延展性和冷韧性，高强度钢板制成，方法高强度钢管用于生产钢板
公开(公告)号：EP2799567A4
公开(公告)日：2015-08-12
申请号：EP12861113
申请日：2012-12-27
申请人： NIPPON STEEL & SUMITOMO METAL CORP
发明人： FUJISHIRO TAISHI , SAKAMOTO SHINYA , HARA TAKUYA , TERADA YOSHIO
IPC分类号： C22C38/04 , B21B3/00 , B23K9/025 , B23K9/23 , B23K31/00 , B23K103/04 , C21D6/00 , C21D8/02 , C21D9/08 , C21D9/50 , C22C38/58
CPC分类号： C22C38/58 , B23K9/0282 , B23K9/18 , C21D8/02 , C21D8/0226 , C21D8/0263 , C21D9/08 , C21D9/50 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/42 , C22C38/48 , C22C38/50 , F16L9/02 , F16L9/17
摘要： A high-strength steel pipe excellent in deformability and low-temperature toughness being a steel pipe obtained by a base steel plate formed into a pipe shape being welded, in which the base steel plate contains, in mass%, C: 0.010 to 0.080%, Si: 0.01 to 0.50%, Mn: 1.2 to 2.8%, S: 0.0001 to 0.0050%, Ti: 0.003 to 0.030%, B: 0.0003 to 0.005%, N: 0.0010 to 0.008%, O: 0.0001 to 0.0080%, one or more of Cr, Cu, and Ni, P: limited to 0.050% or less, Al: limited to 0.020% or less, Mo: limited to 0.03% or less, a Ceq obtained by (Expression 1) below of 0.30 to 0.53 and a Pcm obtained by (Expression 2) below of 0.10 to 0.20, and a balance being composed of iron and inevitable impurities, and a metal structure of the base steel plate contains 27 to 90% in area ratio of polygonal ferrite and a hard phase composed of one or both of bainite and martensite as its balance.

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