公开(公告)号：US09050681B2

公开(公告)日：2015-06-09

申请号：US12449812

申请日：2008-02-29

申请人： Hideki Hamatani ,  Shinji Kodama ,  Nobuo Mizuhashi ,  Sunao Takeuchi ,  Tomohiro Nakaji ,  Takashi Miyakawa ,  Hitoshi Asahi ,  Michitoshi Tanimoto ,  Michimasa Mukai

发明人： Hideki Hamatani ,  Shinji Kodama ,  Nobuo Mizuhashi ,  Sunao Takeuchi ,  Tomohiro Nakaji ,  Takashi Miyakawa ,  Hitoshi Asahi ,  Michitoshi Tanimoto ,  Michimasa Mukai

IPC分类号： B23K10/00 ,  B23K13/00 ,  B23K13/06

CPC分类号： B23K13/00 ,  B23K10/00 ,  B23K11/0873 ,  B23K11/16 ,  B23K11/34 ,  B23K11/36 ,  B23K13/06 ,  B23K28/02 ,  B23K2101/06 ,  B23K2101/10 ,  B23K2101/18 ,  B23K2103/04 ,  Y10T428/12292

摘要： The present invention provides a method of production of electric resistance welded steel pipe able to stably reduce weld defects due to oxides by firing plasma and furthermore able to reduce plasma jet noise and comprises shaping steel plate 1 into a tube and electric resistance welding the abutting end faces 4 during which blowing on at least the abutting end faces 4a in the region 6 at the welding upstream side from the weld point 9 where the temperature becomes 650° C. or more a reducing high temperature (pseudo) laminar plasma obtained by applying voltage to a reducing gas containing H2 gas: 2 to 50 vol % to which is added a balance of Ar gas alone or a mixed gas of Ar gas to which N2 gas, He gas, or both are added. At that time, it is preferable to make the applied voltage over 120V and the make the plasma blowing conditions satisfy the following formula (1). 150

摘要翻译： 本发明提供一种电阻焊钢管的制造方法，其能够通过点火等离子体稳定地减少由于氧化物引起的焊接缺陷，并且还能够降低等离子体射流噪声，并且包括将钢板1成形为管，并且将邻接端 至少在熔点为熔点高于650℃的焊接点的焊接上游侧的区域6中的至少碰撞端面4a或更多的是通过施加电压而获得的还原高温（伪）层流等离子体 涉及含有H2气体的还原气体：2〜50体积％，添加余量的Ar气体或添加有N 2气体，He气体或二者的Ar气体的混合气体。 此时，优选使施加电压超过120V，使等离子体吹送条件满足下式（1）。 150 <4×（ΣG iM i）＆pgr; ×D×μava，T = 7000 <400 <1>

公开(公告)号：US20100104888A1

公开(公告)日：2010-04-29

申请号：US12449812

申请日：2008-02-29

申请人： Hideki Hamatani ,  Shinji Kodama ,  Nobuo Mizuhashi ,  Sunao Takeuchi ,  Tomohiro Nakaji ,  Takashi Miyakawa ,  Hitoshi Asahi ,  Michitoshi Tanimoto ,  Michimasa Mukai

发明人： Hideki Hamatani ,  Shinji Kodama ,  Nobuo Mizuhashi ,  Sunao Takeuchi ,  Tomohiro Nakaji ,  Takashi Miyakawa ,  Hitoshi Asahi ,  Michitoshi Tanimoto ,  Michimasa Mukai

IPC分类号： B32B1/08 ,  B23K11/08 ,  B23K31/02

CPC分类号： B23K13/00 ,  B23K10/00 ,  B23K11/0873 ,  B23K11/16 ,  B23K11/34 ,  B23K11/36 ,  B23K13/06 ,  B23K28/02 ,  B23K2101/06 ,  B23K2101/10 ,  B23K2101/18 ,  B23K2103/04 ,  Y10T428/12292

摘要： The present invention provides a method of production of electric resistance welded steel pipe able to stably reduce weld defects due to oxides by firing plasma and furthermore able to reduce plasma jet noise and comprises shaping steel plate 1 into a tube and electric resistance welding the abutting end faces 4 during which blowing on at least the abutting end faces 4a in the region 6 at the welding upstream side from the weld point 9 where the temperature becomes 650° C. or more a reducing high temperature (pseudo) laminar plasma obtained by applying voltage to a reducing gas containing H2 gas: 2 to 50 vol % to which is added a balance of Ar gas alone or a mixed gas of Ar gas to which N2 gas, He gas, or both are added. At that time, it is preferable to make the applied voltage over 120V and the make the plasma blowing conditions satisfy the following formula (1). 150

摘要翻译： 本发明提供一种电阻焊钢管的制造方法，其能够通过点火等离子体稳定地减少由于氧化物引起的焊接缺陷，并且还能够降低等离子体射流噪声，并且包括将钢板1成形为管，并且将邻接端 至少在熔点为熔点高于650℃的焊接点的焊接上游侧的区域6中的至少碰撞端面4a或更多的是通过施加电压而获得的还原高温（伪）层流等离子体 涉及含有H2气体的还原气体：2〜50体积％，添加余量的Ar气体或添加有N 2气体，He气体或二者的Ar气体的混合气体。 此时，优选使施加电压超过120V，使等离子体吹送条件满足下式（1）。 150 <4×（ΣG i M i）＆pgr; ×D×μava，T = 7000 <400 <1>

公开(公告)号：US09126283B2

公开(公告)日：2015-09-08

申请号：US13806688

申请日：2012-02-03

申请人： Mitsuru Sawamura ,  Hitoshi Asahi

发明人： Mitsuru Sawamura ,  Hitoshi Asahi

IPC分类号： B23K11/00 ,  C22C38/12 ,  C22C38/14 ,  B21C37/08 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D8/10 ,  C21D9/08 ,  F16L9/00 ,  C21D8/02 ,  C21D1/18 ,  C21D1/25 ,  F16L13/02

CPC分类号： B23K11/00 ,  B21C37/08 ,  B23K11/002 ,  B23K11/0073 ,  B23K2101/06 ,  B23K2101/10 ,  B23K2103/04 ,  C21D1/18 ,  C21D1/25 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/08 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  F16L9/00 ,  F16L13/02

摘要： [Summary][Object] There are provided electric resistance welded oil country tubular goods having strength corresponding to API specification 5CT P110 without a heat treatment being performed on the whole steel pipe and further having excellent toughness, and a manufacturing method of an electric resistance welded oil country tubular goods.[Solution] Electric resistance welded oil country tubular goods according to the present invention have a chemical composition that contains, in mass %, C: 0.05 to 0.12%, Si: 0.03 to 0.5%, Mn: 0.80 to 2.2%, P: 0.03% or less, S: 0.003% or less, Al: 0.08% or less, Nb: 0.01% to 0.10%, Ti: 0.005 to 0.03%, B: 0.0005 to 0.0030%, and N: 0.008% or less, and in which Ti>3.4 N is satisfied, its balance is composed of Fe and inevitable impurities, and, VC90 is 15 to 40.

摘要翻译： [摘要]本发明提供具有对应于API规格5CT P110的强度的电阻焊油井筒，而在整个钢管上进行热处理，并具有优异的韧性，以及电阻焊接的制造方法 石油管状物品。 [解决方案]本发明的电焊焊接油国家管状物具有以质量％计含有C：0.05〜0.12％，Si：0.03〜0.5％，Mn：0.80〜2.2％，P：0.03的化学组成 ％以下，S：0.003％以下，Al：0.08％以下，Nb：0.01〜0.10％，Ti：0.005〜0.03％，B：0.0005〜0.0030％，N：0.008％以下， 其中Ti> 3.4N，其余量由Fe和不可避免的杂质构成，VC90为15〜40。

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

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.

公开(公告)号：US20110023991A1

公开(公告)日：2011-02-03

申请号：US12736359

申请日：2009-04-04

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

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

IPC分类号： F16L9/02 ,  C21D11/00 ,  C22C38/00 ,  C22C38/32 ,  C22C38/16 ,  C22C38/08 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

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 Ar3+60° C., an end temperature of Ar3 or more, and a reduction ratio of 1.5 or more, then the plate is air-cooled and then acceleratedly cooled from Ar3−100° C. to Ar3−10° C. in temperature by 10° C./s or more.

摘要翻译： 本发明提供了具有优异的低温韧性的高强度钢板，使用其作为贱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，金属结构的面积为多边形 铁素体为20〜90％，并且具有由贝氏体和马氏体中的一种或两者构成的硬质相的平衡。 为了得到该钢板，以Ar3 + 60℃以下的起始温度，Ar3以上的结束温度和1.5以上的压下率进行变形导入轧制， 然后冷却，然后在温度10℃/ s以上从Ar3-100℃加速冷却至Ar3-10℃。

公开(公告)号：US20100003535A1

公开(公告)日：2010-01-07

申请号：US12312879

申请日：2007-12-04

申请人： Takuya Hara ,  Hitoshi Asahi

发明人： Takuya Hara ,  Hitoshi Asahi

IPC分类号： C22C38/00 ,  B23K31/02 ,  B21C37/08 ,  C22C38/04 ,  C21D9/08 ,  B23K9/18 ,  C22C38/08

CPC分类号： C22C38/02 ,  B21C37/08 ,  B23K9/0253 ,  B23K2101/06 ,  B23K2103/04 ,  C21D8/021 ,  C21D8/0226 ,  C21D9/08 ,  C21D9/50 ,  C21D9/505 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  Y10T428/12292 ,  Y10T428/12653 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972

摘要： The present invention provides high strength thick welded steel pipe for line pipe superior in low temperature toughness, and a method of production of the same. A base material steel plate containing C: 0.010 to 0.050%, Si: 0.01 to 0.50%, Mn: 0.50 to 2.00%, Al: 0.020% or less, Ti: 0.003 to 0.030%, and Mo: 0.10 to 1.50%, having a carbon equivalent Ceq of 0.30 to 0.53, having a crack susceptability parameter Pcm of 0.10 to 0.20, satisfying formula 3, comprised an area ratio of 20% or less of polygonal ferrite and an area ratio of 80% or more of bainite, and having an effective crystal grain size of 20 μm or less is formed into a pipe shape, then seam welded to make the effective crystal grain size of the heat affected zone 150 μm or less: 10C+100Al+5Mo+5Ni

摘要翻译： 本发明提供了具有优异的低温韧性的管线管的高强度厚焊接钢管及其制造方法。 将含有C：0.010〜0.050％，Si：0.01〜0.50％，Mn：0.50〜2.00％，Al：0.020％以下，Ti：0.003〜0.030％，Mo：0.10〜1.50％的基材钢板， 具有0.30至0.53的碳当量Ceq，其裂纹敏感性参数Pcm为0.10至0.20，满足公式3，其面积比为多边形铁素体的面积比为20％或更小，贝氏体的面积比为80％以上，并且具有 将有效的20μm以下的晶粒尺寸形成为管状，然后进行缝焊，使热影响区域的有效晶粒尺寸为150μm以下：10C + 100Al + 5Mo + 5Ni

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。

公开(公告)号：US06248187B1

公开(公告)日：2001-06-19

申请号：US09402826

申请日：1999-10-12

申请人： Hitoshi Asahi ,  Koichi Nose

发明人： Hitoshi Asahi ,  Koichi Nose

IPC分类号： C22C3818

CPC分类号： C22C38/04 ,  C21D1/18 ,  C21D6/002 ,  C21D2211/008 ,  C22C38/18

摘要： An object of the present invention is to provide a corrosion resistant steel excellent in strength and low temperature toughness as well as resistance to corrosion by carbon dioxide and seawater, and most suitable for oil well steel pipes and line pipes for production and transportation of gas, petroleum, etc. used in the field of energy, or a steel for plants, and corrosion resistant oil well steel pipes. The corrosion resistant steel and the corrosion resistant oil well steel pipes comprise, based on weight, up to 0.30% of C, up to 1.0% of Si, 0.2 to 2.0% of Mn, 2.1 to less than 5.0% of Cr, up to 0.03% of P, up to 0.02% of S, up to 0.10% of Al, up to 0.015% of N, optionally containing Cu, Ni, Mo, Ti, Nb and B, and the balance of Fe and unavoidable impurities, and have a martensitic structure as their metallic structure.

摘要翻译： 本发明的目的在于提供强度和低温韧性优异以及二氧化碳和海水的耐腐蚀性的耐腐蚀性钢，最适用于生产和运输气体的油井钢管和管线， 石油等用于能源领域，或用于钢铁厂和耐腐蚀油井钢管。 耐腐蚀钢和耐腐蚀油井钢管以重量计最多可达0.30％C，高达1.0％的Si，0.2〜2.0％的Mn，2.1〜小于5.0％的Cr，直至 0.03％的P，高达0.02％的S，至多0.10％的Al，至多0.015％的N，任选地含有Cu，Ni，Mo，Ti，Nb和B，余量为Fe和不可避免的杂质，以及 具有马氏体结构作为其金属结构。