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63 条记录 (耗时 0.043 秒)

    High Strength Steel Plate and High Strength Welded Pipe Excellent in Ductile Fracture Characteristic and Methods of Production of Same
    43.
    发明申请
    High Strength Steel Plate and High Strength Welded Pipe Excellent in Ductile Fracture Characteristic and Methods of Production of Same 有权
    高强度钢板和高强度焊接管优异的韧性断裂特性及其生产方法

    公开(公告)号：US20090025835A1

    公开(公告)日：2009-01-29

    申请号：US11887885

    申请日：2005-04-19

    申请人： Takuya Hara ,  Yasuhiro Shinohara ,  Hitoshi Asahi ,  Yoshio Terada

    发明人： Takuya Hara ,  Yasuhiro Shinohara ,  Hitoshi Asahi ,  Yoshio Terada

    IPC分类号： C21D9/08 ,  C22C38/04 ,  C22C38/08 ,  C22C38/20 ,  C22C38/32 ,  C22C38/44

    CPC分类号： C22C38/02 ,  C21D8/0205 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/42 ,  C22C38/44 ,  C22C38/58

    摘要： The present invention provides high strength steel plate and high strength welded pipe excellent in ductile fracture characteristic and methods of production of the same, that is, high strength steel plate excellent in ductile fracture characteristic, and high strength welded pipe using that steel plate as a base material, having a tensile strength corresponding to the X100 class of the API standard, containing, by mass %, C: 0.01 to 0.5%, Si: 0.01 to 3%, Mn: 0.1 to 5%, P: 0.03% or less, and S: 0.03% or less and a balance of Fe and unavoidable impurities, having a microstructure comprised of, by area ratio, 1 to 60% of ferrite and the balance of bainite and martensite, having a maximum value of the {100} accumulation degree of the cross-section rotated 20 to 50° from the plate thickness cross-section about the rolling direction as an axis of 3 or less, and having plate thickness parallel cracks measured by ultrasonic flaw detection of less than 1 mm.

    摘要翻译： 本发明提供了具有优异的延性断裂特性的高强度钢板和高强度焊接管及其制造方法，即延性断裂特性优异的高强度钢板，以及使用该钢板作为 基材，具有对应于API标准的X100等级的拉伸强度，以质量％计含有C：0.01〜0.5％，Si：0.01〜3％，Mn：0.1〜5％，P：0.03％以下 ，S：0.03％以下，余量为Fe和不可避免的杂质，其微结构由面积比为1〜60％的铁素体和余量的贝氏体和马氏体构成，其最大值为{100} 横截面从作为轴线的轧制方向的板厚横截面旋转20至50°的横截面的累积度为3以下，并且通过超声波探伤小于1mm测量的板厚平行裂纹。

    Steel Plate or Steel Pipe with Small Occurrence of Bauschinger Effect and Methods of Production of Same
    44.
    发明申请
    Steel Plate or Steel Pipe with Small Occurrence of Bauschinger Effect and Methods of Production of Same 有权
    钢板或钢管发生渗锌效应小的钢管或其生产方法

    公开(公告)号：US20080286504A1

    公开(公告)日：2008-11-20

    申请号：US10588837

    申请日：2005-02-15

    申请人： Hitoshi Asahi ,  Eiji Tsuru

    发明人： Hitoshi Asahi ,  Eiji Tsuru

    IPC分类号： B32B1/08 ,  C22C38/04 ,  C22C38/08 ,  C22C38/16 ,  C22C38/18 ,  C21D6/00 ,  C21D9/08 ,  C21D8/10

    CPC分类号： C22C38/02 ,  C21D6/005 ,  C21D9/08 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/04 ,  Y10T428/13

    摘要： The present invention provides steel plate or steel pipe with small occurrence of the Bauschinger effect and methods of production of the same, particularly steel pipe used for steel pipe for oil wells or line pipe with a small drop in the compression strength in the circumferential direction due to the Bauschinger effect when expanded and methods of production of the same, that is steel plate or steel pipe with small occurrence of the Bauschinger effect characterized by having a dual-phase structure substantially comprising a ferrite structure and fine martensite which is dispersed in the ferrite structure. Further, this steel plate or steel pipe contains, by mass %, C: 0.03 to 0.30%, Si: 0.01 to 0.8%, Mn: 0.3 to 2.5%, P: 0.03% or less, S: 0.01% or less, Al: 0.001 to 0.01%, and N: 0.01% or less and a balance of iron and unavoidable impurities.

    摘要翻译： 本发明提供了一种具有较少出现Bauschinger效应的钢板或钢管及其制造方法，特别是用于油井或管线管的钢管，其圆周方向的压缩强度小压降 在膨胀时的Bauschinger效应及其生产方法，即具有较少出现Bausinger效应的钢板或钢管的特征在于具有基本上包含铁素体结构的双相结构和分散在铁素体中的细小马氏体 结构体。 此外，该钢板或钢管以质量％计含有C：0.03〜0.30％，Si：0.01〜0.8％，Mn：0.3〜2.5％，P：0.03％以下，S：0.01％以下，Al ：0.001〜0.01％，N：0.01％以下，余量为铁和不可避免的杂质。

    High-strength steel pipe excellent in formability and burst resistance
    46.
    发明授权
    High-strength steel pipe excellent in formability and burst resistance 有权
    高强度钢管，成型性和抗爆性优良

    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，

    Super-high-strength line pipe excellent in low temperature toughness and production method thereof
    47.
    发明授权
    Super-high-strength line pipe excellent in low temperature toughness and production method thereof 有权
    低温韧性优异的超高强度线管及其制造方法

    公开(公告)号：US06532995B1

    公开(公告)日：2003-03-18

    申请号：US09478653

    申请日：2000-01-06

    申请人： Hitoshi Asahi ,  Hiroshi Tamehiro ,  Takuya Hara ,  Yoshio Terada ,  Shigeru Ohkita ,  Kunio Koyama

    发明人： Hitoshi Asahi ,  Hiroshi Tamehiro ,  Takuya Hara ,  Yoshio Terada ,  Shigeru Ohkita ,  Kunio Koyama

    IPC分类号： F16L900

    CPC分类号： C22C38/12 ,  C22C38/04 ,  C22C38/08 ,  C22C38/44 ,  C22C38/46 ,  C22C38/58 ,  Y10T29/18

    摘要： To provide a super-high strength line pipe that is excellent in low temperature toughness, can be field welded easily, and has a tensile strength of at least 900 MPa (exceeding ×100 of the API standard), and a production method thereof. The present invention relates to a super-high strength line pipe produced by shaping a steel plate into a pipe shape and arc welding seam portions, the strength of a base steel portion is 900 to 1,100 MPa and the strength of the weld metal is higher than the base steel strength −100 MPa. In the steel pipe, the Ni content of the weld metal is higher by at least 1% than that of the base steel. The combination of the chemical components of the steel plate with those of the weld metal, for accomplishing these steel pipes by a U&O step is shown concretely. A production method of the steel plate and the welding method for achieving the steel pipe are also described. Furthermore, a method of reducing the strength of the inner surface of the weld metal to restrict cracking at the time of pipe expansion is also shown.

    摘要翻译： 为了提供低温韧性优异的超高强度线管，可以容易地进行现场焊接，并且具有至少900MPa（超过API标准的×100）的拉伸强度及其制造方法。 本发明涉及一种通过将钢板成形为管状和电弧焊缝部而制造的超高强度线管，基部钢的强度为900〜1100MPa，焊接金属的强度高于 基钢强度-100MPa。 在钢管中，焊接金属的Ni含量比基体钢高1％以上。 具体地说，钢板的化学成分与焊接金属的化学成分的组合，通过U＆O工序来实现这些钢管。 还描述了钢板的制造方法和用于实现钢管的焊接方法。 此外，还示出了降低焊接金属内表面的强度以限制管膨胀时的开裂的方法。

    OIL COUNTRY TUBULAR GOODS WITH DUAL PHASE STRUCTURE AND PRODUCING METHOD THEREOF
    50.
    发明申请
    OIL COUNTRY TUBULAR GOODS WITH DUAL PHASE STRUCTURE AND PRODUCING METHOD THEREOF 有权
    具有双相结构的油类国家管状物品及其生产方法

    公开(公告)号：US20130118632A1

    公开(公告)日：2013-05-16

    申请号：US13806415

    申请日：2011-07-13

    申请人： Mitsuru Sawamura ,  Hitoshi Asahi ,  Eiji Tsuru ,  Jun Agata

    发明人： Mitsuru Sawamura ,  Hitoshi Asahi ,  Eiji Tsuru ,  Jun Agata

    IPC分类号： F16L9/02 ,  B21B23/00

    CPC分类号： F16L9/02 ,  B21B23/00 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/14 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

    摘要： A steel pipe with dual phase structure includes, as chemical composition, by mass %, C: 0.07% to 0.15%, Si: 0.1% to 0.5%, Mn: 0.8% to 1.9%, Nb: 0.020% to 0.10%, P: limited to 0.05% or less, S: limited to 0.01% or less, Al: limited to 0.1% or less, and a balance consisting of iron and unavoidable impurities, wherein, when [X] is amount of element X in mass %, carbon equivalent Ceq defined by Equation of Ceq=[C]+[Mn]/6 is 0.25 to 0.40 and [Nb]×[C]≧0.002 is satisfied, and includes, as metallographic structure, by area %, ferrite of 80% to 98% and martensite, residual austenite, or mixture thereof of 2% to 20% in total, wherein average grain size of ferrite is 1 μm to less than 8 μm and average grain size of martensite, residual austenite, or mixture thereof is 0.1 μm to 2 μm.

    摘要翻译： 具有双相结构的钢管以质量％计含有C：0.07〜0.15％，Si：0.1〜0.5％，Mn：0.8〜1.9％，Nb：0.020〜0.10％，P ：限于0.05％以下，S：0.01％以下，Al：0.1％以下，余量由铁和不可避免的杂质构成，其中，[X]为质量％ ，Ceq = [C] + [Mn] / 6的等式定义的碳当量Ceq为0.25〜0.40，[Nb]×[C]> = 0.002，作为金相组织，以面积％计， 80％〜98％，马氏体，残余奥氏体或其混合物总计为2％〜20％，其中铁素体的平均粒径为1μm〜小于8μm，马氏体，残余奥氏体或其混合物的平均粒径 为0.1〜2μm。