知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

63 条记录 (耗时 0.035 秒)

    Martensitic stainless steel having excellent hot workability and sulfide stress cracking resistance
    1.
    发明授权
    Martensitic stainless steel having excellent hot workability and sulfide stress cracking resistance 失效
    具有优异的热加工性和耐硫化物应力开裂性的马氏体不锈钢

    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。

    High-strength steel sheet and high-strength steel pipe excellent in deformability and method for producing the same
    2.
    发明授权
    High-strength steel sheet and high-strength steel pipe excellent in deformability and method for producing the same 有权
    可变形性优异的高强度钢板和高强度钢管及其制造方法

    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。

    Ultrahigh strength welded joint and ultrahigh strength welded steel pipe excellent in cold cracking resistance of weld metal, and methods for producing the same
    3.
    发明授权
    Ultrahigh strength welded joint and ultrahigh strength welded steel pipe excellent in cold cracking resistance of weld metal, and methods for producing the same 有权
    焊接金属的耐寒裂纹性优异的超高强度焊接接头和超高强度焊接钢管及其制造方法

    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

    Ultrahigh strength welded joint and ultrahigh strength welded steel pipe excellent in cold cracking resistance of weld metal, and methods for producing the same
    4.
    发明申请
    Ultrahigh strength welded joint and ultrahigh strength welded steel pipe excellent in cold cracking resistance of weld metal, and methods for producing the same 审中-公开

    公开(公告)号：US20110250471A1

    公开(公告)日：2011-10-13

    申请号：US13134781

    申请日：2011-06-15

    申请人： Takuya Hara ,  Hitoshi Asahi

    发明人： Takuya Hara ,  Hitoshi Asahi

    IPC分类号： B32B15/18

    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.

    Method for producing ultra-high strength, weldable steels with superior toughness
    7.
    发明授权
    Method for producing ultra-high strength, weldable steels with superior toughness 失效
    具有优异韧性的超高强度，可焊接钢的生产方法

    公开(公告)号：US06248191B1

    公开(公告)日：2001-06-19

    申请号：US09123858

    申请日：1998-07-28

    申请人： Michael J. Luton ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Masaaki Sugiyama

    发明人： Michael J. Luton ,  Jayoung Koo ,  Narasimha-Rao V. Bangaru ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Masaaki Sugiyama

    IPC分类号： C21D800

    CPC分类号： C21D6/005 ,  C21D1/19 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/008

    摘要： A method is provided for producing an ultra-high strength steel having a tensile strength of at least about 900 MPa (130 ksi), a toughness as measured by Charpy V-notch impact test at −40° C. (−40° F.) of at least about 120 joules (90 ft-lbs), and a microstructure comprising predominantly fine-grained lower bainite, fine-grained lath martensite, or mixtures thereof, transformed from substantially unrecrystallized austenite grains and comprising iron and specified weight percentages of the additives: carbon, silicon, manganese, copper, nickel, niobium, vanadium, molybdenum, chromium, titanium, aluminum, calcium, Rare Earth Metals, and magnesium. A steel slab is heated to a suitable temperature; the slab is reduced to form plate in one or more hot rolling passes in a first temperature range in which austenite recrystallizes; said plate is further reduced in one or more hot rolling passes in a second temperature range below said first temperature range and above the temperature at which austenite begins to transform to ferrite during cooling; said plate is quenched to a suitable Quench Stop Temperature; and said quenching is stopped and said plate is allowed to air cool to ambient temperature.

    摘要翻译： 提供一种制造抗拉强度为至少约900MPa（130ksi）的超高强度钢，-40℃下通过夏比V-缺口冲击试验测得的韧性的方法（-40°F） ）至少约120焦耳（90ft-lbs），以及由基本上未再结晶的奥氏体晶粒转化并且包含铁和特定重量百分比的主要由细晶粒的下贝氏体，细粒状板条马氏体或其混合物组成的微结构， 添加剂：碳，硅，锰，铜，镍，铌，钒，钼，铬，钛，​​铝，钙，稀土金属和镁。 将钢坯加热到合适的温度; 在奥氏体再结晶的第一温度范围内，在一个或多个热轧道中，将板坯还原成板; 所述板在一个或多个热轧道中在低于所述第一温度范围和高于在冷却期间奥氏体开始转变为铁素体的温度的温度范围内进一步减小; 所述板淬火至合适的淬火停止温度; 并且停止淬火，并使所述板空气冷却至环境温度。

    Ultra-high strength, weldable, boron-containing steels with superior toughness
    8.
    发明授权
    Ultra-high strength, weldable, boron-containing steels with superior toughness 失效
    超高强度，可焊接，具有优异韧性的含硼钢

    公开(公告)号：US06228183B1

    公开(公告)日：2001-05-08

    申请号：US09123791

    申请日：1998-07-28

    申请人： Narasimha-Rao V. Bangaru ,  Jayoung Koo ,  Michael J. Luton ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

    发明人： Narasimha-Rao V. Bangaru ,  Jayoung Koo ,  Michael J. Luton ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

    IPC分类号： C22C3814

    CPC分类号： C22C38/06 ,  C21D1/19 ,  C21D8/00 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

    摘要： An ultra-high strength boron-containing steel having a tensile strength of at least about 900 MPa (130 ksi), a toughness as measured by Charpy V-notch impact test at −40° C. (−40° F.) of at least about 120 joules (90 ft-lbs), and a microstructure comprising predominantly fine-grained lower bainite, fine-grained lath martensite, or mixtures thereof, transformed from substantially unrecrystallized austenite grains and comprising iron and specified weight percentages of the additives: carbon, silicon, manganese, copper, nickel, niobium, vanadium, molybdenum, chromium, titanium, aluminum, calcium, Rare Earth Metals, and magnesium, is prepared by heating a steel slab to a suitable temperature; reducing the slab to form plate in one or more hot rolling passes in a first temperature range in which austenite recrystallizes; further reducing said plate in one or more hot rolling passes in a second temperature range below said first temperature range and above the temperature at which austenite begins to transform to ferrite during cooling; quenching said plate to a suitable Quench Stop Temperature; and stopping said quenching and allowing said plate to air cool to ambient temperature.

    摘要翻译： 具有至少约900MPa（130ksi）拉伸强度的超高强度含硼钢，在-40℃（-40°F）下通过夏比V-缺口冲击试验测得的韧性 至少约120焦耳（90ft-lbs），以及由基本上未再结晶的奥氏体晶粒转化并且包含铁和特定重量百分比的添加剂的主要包含细粒度的下贝氏体，细粒状板条马氏体或其混合物的微观结构：碳 通过将钢坯加热到合适的温度来制备硅，锰，铜，镍，铌，钒，钼，铬，钛，​​铝，钙，稀土金属和镁， 在奥氏体重结晶的第一温度范围内，在一个或多个热轧道中将板坯还原成板; 在低于所述第一温度范围的第二温度范围内并且高于在冷却期间奥氏体开始转变为铁素体的温度的一个或多个热轧道中进一步减少所述板; 将所述板淬火至合适的淬火停止温度; 并停止所述淬火并允许所述板空气冷却至环境温度。

    HIGH-STRENGTH WELDED STEEL PIPE AND METHOD FOR PRODUCING THE SAME
    10.
    发明申请
    HIGH-STRENGTH WELDED STEEL PIPE AND METHOD FOR PRODUCING THE SAME 有权
    高强度焊接钢管及其制造方法

    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。