公开(公告)号：US06782921B1

公开(公告)日：2004-08-31

申请号：US10296854

申请日：2002-11-26

申请人： Eiji Tsuru ,  Takuya Hara ,  Hitoshi Asahi ,  Hideki Miyazaki ,  Tatsuya Yoshida

发明人： Eiji Tsuru ,  Takuya Hara ,  Hitoshi Asahi ,  Hideki Miyazaki ,  Tatsuya Yoshida

IPC分类号： F16L914

CPC分类号： F16L9/17 ,  B21C37/08 ,  B21C37/0811 ,  B21C37/0815 ,  B21C37/30 ,  B23K2101/06 ,  Y10T29/18

摘要： A high-strength steel pipe excellent in formability and burst resistance wherein, when a high-strength steel pipe exceeding 850 N/mm2 in tensile strength is produced by a UOE method, a ratio (R/r) of an average radius of curvature in a range of 120 mm in a circumferential direction including a weld of the steel pipe before pipe expansion in a pipe expansion process (R) to the radius of the steel pipe after pipe expansion (r) is 0.65 to 2.0, and preferably the ratio (R/r) is 0.90 to 2.0. Preferably, Vickers hardness of the base metal Hv, the minimum Vickers hardness at the HAZ Hz, pipe wall thickness t, and a peaking amount at the weld of the steel pipe before pipe expansion in a pipe expansion process &dgr; satisfy the following expression, (1+0.005t|&dgr;|)Hz

摘要翻译： 通过UOE法制造拉伸强度超过850N / mm 2的高强度钢管时，成形性和耐冲击性优异的高强度钢管，平均半径的比（R / r） 在管膨胀过程（R）中的管膨胀前的钢管的焊接与管膨胀后的钢管的半径（r）为0.65〜2.0的圆周方向的弯曲范围为120mm，优选为 比率（R / r）为0.90〜2.0。 优选地，在管膨胀过程δ中，在管膨胀之前，基体金属Hv的维氏硬度，HAZHz的最小维氏硬度，管壁厚度t和钢管的焊接处的峰值满足以下表达式，

公开(公告)号：US08653400B2

公开(公告)日：2014-02-18

申请号：US11884860

申请日：2006-02-22

申请人： Eiji Tsuru ,  Takuya Hara ,  Hitoshi Asahi ,  Hiroshi Morimoto ,  Yoshio Terada ,  Tatsuya Yoshida ,  Kouichi Shinada

发明人： Eiji Tsuru ,  Takuya Hara ,  Hitoshi Asahi ,  Hiroshi Morimoto ,  Yoshio Terada ,  Tatsuya Yoshida ,  Kouichi Shinada

IPC分类号： B23K31/02 ,  B23K33/00 ,  B21C37/08

CPC分类号： B23K31/027 ,  B21C37/08 ,  B23K33/006 ,  B23K2101/06 ,  C21D3/06 ,  C21D9/08 ,  C21D9/50 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/58 ,  Y10T29/5185

摘要： The present invention provides a high strength welded steel pipe superior in weld zone embrittlement crack characteristics and a method of production of the same, that is, a method of production of a welded steel pipe superior in hydrogen embrittlement cracking resistance of weld metal characterized by seam welding from the inner and outer surfaces by a tensile strength of 850 MPa or more, then expanding or reducing the size of the pipe for correction, which method of production of welded steel pipe characterized in that the hydrogen concentration of the preceding weld metal is 0.2 cc or less per 100 g at ordinary temperature.

摘要翻译： 本发明提供了一种焊接区脆性裂纹特性优异的高强度焊接钢管及其制造方法，即以接缝为特征的焊接金属的耐氢脆裂纹性优异的焊接钢管的制造方法 从内外表面拉伸强度为850MPa以上，然后扩大或缩小用于校正的管道的尺寸，该焊接钢管的制造方法的特征在于，前述焊接金属的氢浓度为0.2 在常温下每100g 100g以下。

公开(公告)号：US20080257008A1

公开(公告)日：2008-10-23

申请号：US11884860

申请日：2006-02-22

申请人： Eiji Tsuru ,  Takuya Hara ,  Hitoshi Asahi ,  Hiroshi Morimoto ,  Yoshio Terada ,  Tatsuya Yoshida ,  Kouichi Shinada

发明人： Eiji Tsuru ,  Takuya Hara ,  Hitoshi Asahi ,  Hiroshi Morimoto ,  Yoshio Terada ,  Tatsuya Yoshida ,  Kouichi Shinada

IPC分类号： B21C37/08 ,  B23K9/02 ,  C21D3/06 ,  C21D9/08 ,  C22C38/00 ,  F16L9/02

CPC分类号： B23K31/027 ,  B21C37/08 ,  B23K33/006 ,  B23K2101/06 ,  C21D3/06 ,  C21D9/08 ,  C21D9/50 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/58 ,  Y10T29/5185

摘要： The present invention provides a high strength welded steel pipe superior in weld zone embrittlement crack characteristics and a method of production of the same, that is, a method of production of a welded steel pipe superior in hydrogen embrittlement cracking resistance of weld metal characterized by seam welding from the inner and outer surfaces by a tensile strength of 850 MPa or more, then expanding or reducing the size of the pipe for correction, which method of production of welded steel pipe characterized in that the hydrogen concentration of the preceding weld metal is 0.2 cc or less per 100 g at ordinary temperature.

摘要翻译： 本发明提供了一种焊接区脆性裂纹特性优异的高强度焊接钢管及其制造方法，即以接缝为特征的焊接金属的耐氢脆裂纹性优异的焊接钢管的制造方法 从内外表面拉伸强度为850MPa以上，然后扩大或缩小用于校正的管道的尺寸，该焊接钢管的制造方法的特征在于，前述焊接金属的氢浓度为0.2 在常温下每100g 100g以下。

公开(公告)号：US08974610B2

公开(公告)日：2015-03-10

申请号：US13575051

申请日：2011-02-04

申请人： Taishi Fujishiro ,  Takuya Hara ,  Yoshio Terada ,  Shinya Sakamoto ,  Hitoshi Asahi

发明人： Taishi Fujishiro ,  Takuya Hara ,  Yoshio Terada ,  Shinya Sakamoto ,  Hitoshi Asahi

IPC分类号： C21D9/08 ,  C21D8/10 ,  C22C38/12 ,  C22C38/02 ,  C22C38/04 ,  F16L31/02 ,  B23K35/30 ,  B23K31/02 ,  C21D9/50 ,  C22C38/00 ,  C22C38/14

CPC分类号： B23K35/3053 ,  B23K31/027 ,  B23K2101/06 ,  B23K2103/04 ,  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 γ grains in heat affected zones in the steel plate is 250 μm or less, and the prior γ grains include bainite and intragranular bainite.

摘要翻译： 通过焊接形成管状的钢板的焊缝部分来获得高强度焊接钢管。 在高强度焊接钢管中，钢板的贱金属以质量％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，Fe和不可避免的杂质余量Ceq为0.30〜0.53，Pcm为0.10〜0.20，[N] - [Ti] /3.4小于0.003，平均粒径 钢板的热影响区域的现有γ晶粒的尺寸为250μm以下，原来的γ晶粒包括贝氏体和晶粒内贝氏体。

公开(公告)号：US20120291907A1

公开(公告)日：2012-11-22

申请号：US13575051

申请日：2011-02-04

申请人： Taishi Fujishiro ,  Takuya Hara ,  Yoshio Terada ,  Shinya Sakamoto ,  Hitoshi Asahi

发明人： Taishi Fujishiro ,  Takuya Hara ,  Yoshio Terada ,  Shinya Sakamoto ,  Hitoshi Asahi

IPC分类号： F16L9/00 ,  B23K31/02

CPC分类号： B23K35/3053 ,  B23K31/027 ,  B23K2101/06 ,  B23K2103/04 ,  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 γ grains in heat affected zones in the steel plate is 250 μm or less, and the prior γ grains include bainite and intragranular bainite.

摘要翻译： 通过焊接形成管状的钢板的焊缝部分来获得高强度焊接钢管。 在高强度焊接钢管中，钢板的贱金属以质量％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，Fe和不可避免的杂质余量Ceq为0.30〜0.53，Pcm为0.10〜0.20，[N] - [Ti] /3.4小于0.003，平均粒径 钢板的热影响区域的现有γ晶粒的尺寸为250μm以下，原来的γ晶粒包括贝氏体和晶粒内贝氏体。

公开(公告)号：US07736447B2

公开(公告)日：2010-06-15

申请号：US10582830

申请日：2004-12-17

申请人： Hitoshi Asahi ,  Takuya Hara

发明人： Hitoshi Asahi ,  Takuya Hara

IPC分类号： C22C38/12 ,  C22C38/14 ,  C22C38/04 ,  C21D8/02 ,  C21D8/10

CPC分类号： C22C38/12 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/08 ,  C21D9/46 ,  C21D2211/002 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： Ultra-high-strength linepipes having excellent low-temperature toughness manufactured by welding together the edges of steel plates comprising C of 0.03 to 0.07 mass %, Si of not more than 0.6 mass %, Mn of 1.5 to 2.5 mass %, P of not more than 0.015 mass %, S of not more than 0.003 mass %, Ni of 0.1 to 1.5 mass %, Mo of 0.15 to 0.60 mass %, Nb of 0.01 to 0.10 mass %, Ti of 0.005 to 0.030 mass %, Al of not more than 0.06 mass %, one or more of required amounts of B, N, V, Cu, Cr, Ca, REM (rare-earth metals) and Mg, with the remainder consisting of iron and unavoidable impurities and having a (Hv-ave)/(Hv-M) ratio between 0.8 and 0.9 at 2.5≦P≦4.0, wherein Hv-ave is the average Vickers hardness in the direction of the thickness of the base metal and Hv-M is the martensite hardness depending on C-content (Hv-M=270+1300C) and a tensile strength TS-C between 900 MPa and 1100 MPa; P=2.7C+0.4Si+Mn+0.8Cr+0.45(Ni+Cu)+(1+β)Mo−1+β (β=1 when B≧3 ppm and β=0 when B

摘要翻译： 通过将包含0.03〜0.07质量％的C，不大于0.6质量％的Si，1.5〜2.5质量％的Mn，1.5〜2.5质量％的Mn，不为P的钢板的边缘焊接在一起，制造出优异的低温韧性的超高强度线管 大于0.015质量％，S：0.003质量％以下，Ni：0.1〜1.5质量％，Mo：0.15〜0.60质量％，Nb：0.01〜0.10质量％，Ti：0.005〜0.030质量％ 大于0.06质量％，所需量的B，N，V，Cu，Cr，Ca，REM（稀土金属）和Mg中的一种或多种，​​其余由铁和不可避免的杂质组成，并具有（Hv- ave）/（Hv-M）在2.5和nlE下的0.8和0.9之间的比值; P＆nlE; 4.0，其中Hv-ave是贱金属厚度方向上的维氏硬度平均值，Hv-M是马氏体硬度，取决于 C含量（Hv-M = 270±1300℃），拉伸强度TS-C在900MPa〜1100MPa之间; P = 2.7C + 0.4Si + Mn + 0.8Cr + 0.45（Ni + Cu）+（1 +＆bgr）Mo-1 +＆bgr; （B≥3ppm时＆Bgr = 1，B≤3ppm时为＆bgr = 0）。

公开(公告)号：US07601231B2

公开(公告)日：2009-10-13

申请号：US10444743

申请日：2003-05-23

申请人： Takuya Hara ,  Hitoshi Asahi

发明人： Takuya Hara ,  Hitoshi Asahi

IPC分类号： C22C38/04 ,  C22C38/14 ,  C22C38/12

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/10 ,  C21D8/1261 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/58 ,  Y10S148/909

摘要： A high-strength steel pipe excellent in weldability on site and a method for producing the steel pipe by improving the reliability of the low temperature toughness of a steel are provided. For example, the steel pipe includes elements to enhance hardenability for furthering high-strengthening and also improving toughness at a weld heat affected zone subjected to double or more layer welding. In the method, the steel is made to consist of a structure composed of bainite and/or martensite by containing prescribed amounts of C, Si, Mn, P, S, Ni, Mo, Nb, Ti, Al and N, and, as occasion demands, one or more of B, V, Cu, Cr, Ca, REM, and Mg, and regulating C, Si, Mn, Cr, Ni, Cu, V and Mo. Such elements enhancing hardenability, by a specific relational expression. The diameter of prior austenite grains may be regulated in a prescribed range. The method may include heating a casting to a temperature not lower than the Ac3 point, hot rolling such casting, and thereafter cooling the resulting hot-rolled steel plate at a prescribed cooling rate.

摘要翻译： 提供了一种现场焊接性优异的高强度钢管和通过提高钢的低温韧性的可靠性来制造钢管的方法。 例如，钢管包括提高淬火性的元素，以进一步提高强化强度，并提高经受双层或多层焊接的焊接热影响区的韧性。 在该方法中，通过含有规定量的C，Si，Mn，P，S，Ni，Mo，Nb，Ti，Al和N，由贝氏体和/或马氏体构成的结构，由钢构成，作为 需要B，V，Cu，Cr，Ca，REM和Mg中的一种或多种，​​调节C，Si，Mn，Cr，Ni，Cu，V和Mo。这些元素通过具体的关系式提高淬透性 。 原奥氏体晶粒的直径可以在规定的范围内调节。 该方法可以包括将铸件加热到不低于Ac3点的温度，热轧这种铸造，然后以规定的冷却速度冷却所得到的热轧钢板。

公开(公告)号：US5820699A

公开(公告)日：1998-10-13

申请号：US776125

申请日：1997-04-17

申请人： Hitoshi Asahi ,  Takuya Hara ,  Akira Kawakami

发明人： Hitoshi Asahi ,  Takuya Hara ,  Akira Kawakami

IPC分类号： C21D9/08 ,  C21D6/00 ,  C22C38/00 ,  C22C38/42 ,  C22C38/44 ,  C22C38/50

CPC分类号： C21D6/004 ,  C22C38/42 ,  C22C38/44 ,  C21D2211/008

摘要： A martensitic stainless steel capable of developing a tempered martensitic structure, comprising by weight C: 0.005 to 0.05%, Si.ltoreq.0.50%, Mn: 0.1 to 1.0%, P.ltoreq.0.03%, S.ltoreq.0.005%, Mo: 1.0 to 3.0%, Cu: 1.0 to 4.0%, Ni: 5 to 8%, Al.ltoreq.0.06%, Cr and Mo satisfying a requirement represented by the formula Cr+1.6Mo.gtoreq.13; and C, N, Ni, Cu, Cr, and Mo satisfying a requirement represented by the formula Ni(eq): 40C+34N+Ni+0.3Cu-1.1Cr-1.8Mo.gtoreq.-10.5, and optionally at least one member selected from the group consisting of Ti, Zr, Ca, and REM, with the balance consisting essentially of Fe. The present invention provides a martensitic stainless steel having excellent resistance to corrosion by CO.sub.2 and sulfide stress cracking and good hot workability.

摘要翻译： PCT No.PCT / JP95 / 01453 Sec。 371日期1997年04月17日 102（e）日期1997年4月17日PCT提交1995年7月21日PCT公布。 出版物WO96 / 03532 日期：1996年2月8日具有显影回火马氏体组织的马氏体系不锈钢，其含量为C：0.005〜0.05％，Si≤0.50％，Mn：0.1〜1.0％，P≤0.03％ /=0.005%，Mo：1.0〜3.0％，Cu：1.0〜4.0％，Ni：5〜8％，Al：0.06％，Cr和Mo满足式Cr + 1.6Mo> 13; 和C，N，Ni，Cu，Cr和Mo满足由式Ni（eq）表示的要求：40℃+ 34N + Ni + 0.3Cu-1.1Cr-1.8Mo> = 10.5，以及任选的至少一种 选自Ti，Zr，Ca和REM组成的组分，余量基本上由Fe组成。 本发明提供一种马氏体不锈钢，具有优异的耐CO 2腐蚀性和耐硫化应力开裂性以及良好的热加工性。

公开(公告)号：US08070887B2

公开(公告)日：2011-12-06

申请号：US10410014

申请日：2003-04-09

申请人： Hitoshi Asahi ,  Yasuhiro Shinohara ,  Takuya Hara

发明人： Hitoshi Asahi ,  Yasuhiro Shinohara ,  Takuya Hara

IPC分类号： C21D9/08 ,  C22C38/00 ,  C22C38/18

CPC分类号： C22C38/04 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/12 ,  C22C38/14

摘要： The present invention provides a line pipe of, e.g., the API standard X60 to X100 class. The line pipe has an excellent deformability, as well as excellent low temperature toughness and high productivity, a steel plate used as the material of the steel pipe. Methods for producing the steel pipe and the steel plate are also provided. In particular, a high-strength steel plate excellent in the deformability has a ferrite phase is dispersed finely, and accounts for 5% to 40% in area percentage in a low temperature transformation structure mainly composed of a bainite phase. For example, most grain sizes of the ferrite phase are smaller than the average grain size of the bainite phase. A high-strength steel pipe excellent in deformability is also provided, in which a large diameter steel pipe is produced through forming the steel plate into a pipe shape. The steel pipe has the above-referenced structure, and satisfies the conditions that YS/TS is 0.95 or less and YS×uEL is 5,000 or more. Methods for producing such steel plate and steel pipe are also provided.

摘要翻译： 本发明提供了例如API标准X60至X100类的管线管。 线管具有优异的变形性，以及优异的低温韧性和高生产率，用作钢管材料的钢板。 还提供了生产钢管和钢板的方法。 特别是，在主要由贝氏体相组成的低温转变结构中，变形性优异的高强度钢板的铁素体相分散细小，占面积率的5〜40％。 例如，铁素体相的大部分晶粒尺寸小于贝氏体相的平均晶粒尺寸。 还提供了一种变形能力优异的高强度钢管，其中通过将钢板形成管状而制造大直径钢管。 钢管具有上述结构，满足YS / TS为0.95以下，YS×uEL为5000以上的条件。 还提供了生产这种钢板和钢管的方法。

公开(公告)号：US08049131B2

公开(公告)日：2011-11-01

申请号：US10898307

申请日：2004-07-23

申请人： Takuya Hara ,  Hitoshi Asahi

发明人： Takuya Hara ,  Hitoshi Asahi

IPC分类号： B23K9/18 ,  B23K25/00

CPC分类号： B23K35/0261 ,  B23K9/0253 ,  B23K9/186 ,  B23K9/23 ,  B23K35/3066 ,  B23K2101/06 ,  B23K2103/04 ,  Y10T428/12972

摘要： The present invention, in a welded joint of steel sheets and a steel pipe body having a tensile strength of 800 MPa or more (over X100 in API Standards), provides: the welded joint of the steel sheets and the steel pipe produced by forming a steel sheet into a cylindrical shape and welding both the ends thereof, both excellent in cold cracking resistance; and methods for producing them. The present invention includes an ultrahigh strength welded joint and an ultrahigh strength welded steel pipe excellent in the cold cracking resistance of a weld metal, characterized in that the amount of non-diffusible hydrogen in the inner side weld metal is 0.01 ppm or more. It is preferable that the ratio of the non-diffusible hydrogen amount to the total hydrogen amount in said inner side weld metal is 0.5% or more. Further, it is preferable that Mo carbide is contained by not less than 1 piece/μm2 in said inner side weld metal. The present invention also includes a method for producing said welded joint and welded steel pipe, characterized by welding the butted portion from the inner side and thereafter welding it from the outer side so that the reheating temperature of the inner side weld metal may reach within the range from 500° C. to 700° C.

摘要翻译： 本发明在钢板焊接接头和抗拉强度为800MPa以上（在API标准中为X100以上）的钢管体中，提供：钢板的焊接接头和通过形成 钢板成为圆筒状并焊接其两端，耐寒性均优异; 及其生产方法。 本发明包括焊接金属的耐寒裂性优异的超高强度焊接接头和超高强度焊接钢管，其特征在于，内侧焊接金属中的非扩散性氢的量为0.01ppm以上。 优选所述内侧焊接金属中的所述非扩散性氢量与所述总氢量的比率为0.5％以上。 此外，优选在所述内侧焊接金属中含有不小于1个/μm2的Mo碳化物。 本发明还包括一种用于制造所述焊接接头和焊接钢管的方法，其特征在于，从内侧焊接对接部分，然后从外侧焊接，使得内侧焊接金属的再加热温度可达到 范围从500°C到700°C