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：US20120279607A1

公开(公告)日：2012-11-08

申请号：US13486503

申请日：2012-06-01

申请人： Yoshitaka NISHIYAMA ,  Mitsuru YOSHIZAWA ,  Masahiro SETO ,  Katsuki TANAKA

发明人： Yoshitaka NISHIYAMA ,  Mitsuru YOSHIZAWA ,  Masahiro SETO ,  Katsuki TANAKA

IPC分类号： F16L9/00 ,  C21D7/06

CPC分类号： C21D6/004 ,  B21C37/06 ,  B21K21/00 ,  C21D7/06 ,  C21D8/105 ,  C21D9/0068 ,  C21D9/08 ,  C21D2211/001 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  F16L9/02 ,  F22B37/10 ,  F28F21/083 ,  Y10S148/909 ,  Y10T29/479

摘要： There is provided an austenitic stainless steel pipe excellent in steam oxidation resistance. The austenitic stainless steel pipe excellent in steam oxidation resistance contains, by mass percent, 14 to 28% of Cr and 6 to 30% of Ni, and is configured so that a region satisfying the following Formula exists in a metal structure at a depth of 5 to 20 μm from the inner surface of the steel pipe: (α/β)×δ/ε×100≧0.3 where the meanings of symbols in the above Formula are as follows: α: sum total of the number of pixels of digital image in region in which orientation difference of adjacent crystals detected by electron backscattering pattern is 5 to 50 degrees β: the number of total pixels of digital image in region of measurement using electron backscattering pattern ε: analysis pitch width of electron backscattering pattern (μm) δ: grain boundary width (μm).

摘要翻译： 提供了耐蒸汽抗氧化性优异的奥氏体不锈钢管。 耐蒸汽抗氧化性优异的奥氏体系不锈钢管，以质量％计含有Cr的14〜28％，Ni含量为6〜30％，并且，在金属结构体的深度 从钢管的内表面5〜20μm：（α/＆bgr）×δ/＆egr;×100≥0.3上式中的符号的含义如下：α：像素数的总和 通过电子后向散射图案检测的相邻晶体的取向差为5〜50度的区域中的数字图像的数字图像：使用电子后向散射图案的测量区域中的数字图像的总像素数：电子后向散射的分析间距宽度 图案（μm）δ：晶界宽度（μm）。

公开(公告)号：US20110253267A1

公开(公告)日：2011-10-20

申请号：US13103586

申请日：2011-05-09

申请人： Nobuyuki Ishikawa ,  Toyohisa Shinmiya ,  Shigeru Endo ,  Minoru Suwa

发明人： Nobuyuki Ishikawa ,  Toyohisa Shinmiya ,  Shigeru Endo ,  Minoru Suwa

IPC分类号： C21D8/10 ,  C21D1/42

CPC分类号： C22C38/02 ,  C21D8/02 ,  C21D8/10 ,  C21D8/105 ,  C21D9/08 ,  C22C38/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  Y10S148/909

摘要： A high-strength steel pipe having a strength of API X65 grade or higher consisting essentially of, by mass %, 0.02 to 0.08% of C, 0.01 to 0.5% of Si, 0.5 to 1.8% of Mn, 0.01% or less of P, 0.002% or less of S, 0.01 to 0.7% of Al, 0.005 to 0.04% of Ti, 0.05 to 0.50% Mo, at least one element selected from 0.005 to 0.05% of Nb and 0.005 to 0.10% of V, and the balance being Fe, in which the volume percentage of the ferritic phase is 90% or higher, and complex carbides containing Ti, Mo, and at least one element selected from the group consisting of Nb and V are precipitated in the ferritic phase. The high-strength steel pipe has excellent HIC resistance and good toughness of a heat-affected zone, and can be manufactured stably at a low cost.

摘要翻译： 一种强度为API X65等级或更高的高强度钢管，其质量基本上由以下组成：质量％：C：0.02〜0.08％，Si：0.01〜0.5％，Mn：0.5〜1.8％，P：0.01％ ，0.002％以下的S，0.01〜0.7％的Al，0.005〜0.04％的Ti，0.05〜0.50％的Mo，至少1种元素，Nb：0.005〜0.05％，V：0.005〜0.10％ 余量为Fe，其中铁素体相的体积百分比为90％以上，并且含有Ti，Mo和选自Nb和V中的至少一种元素的复合碳化物在铁素体相中析出。 高强度钢管具有优异的耐热性和热影响区的韧性，可以以低成本稳定地制造。

公开(公告)号：US07931757B2

公开(公告)日：2011-04-26

申请号：US12071492

申请日：2008-02-21

申请人： Kunio Kondo ,  Yuji Arai ,  Nobuyuki Hisamune

发明人： Kunio Kondo ,  Yuji Arai ,  Nobuyuki Hisamune

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

CPC分类号： C22C38/005 ,  C21D8/105 ,  C21D9/08 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10S148/909

摘要： A thick-walled seamless steel pipe for line pipe which has a high strength and improved toughness and corrosion resistance in spite of the thick wall and which is suitable for use as a riser and flow line has a chemical composition comprising, in mass percent, C: 0.02-0.08%, Si: at most 0.5%, Mn: 1.5-3.0%, Al: 0.001-0.10%, Mo: greater than 0.4%-1.2%, N: 0.002-0.015%, at least one of Ca and REM in a total amount of 0.0002-0.007%, and a remainder of Fe and impurities, with the impurities having the content of P: at most 0.05%, S: at most 0.005%, and O: at most 0.005%, the chemical composition satisfying the inequality: 0.8≦[Mn]×[Mo]≦2.6, wherein [Mn] and [Mo] are the numbers equivalent to the contents of Mn and Mo, respectively, in mass percent.

摘要翻译： 尽管厚壁具有高强度和改善的韧性和耐腐蚀性并且适合用作提升管和流动管线的管道管的厚壁无缝钢管具有以质量％计含有C ：0.02-0.08％，Si：至多0.5％，Mn：1.5-3.0％，Al：0.001-0.10％，Mo：大于0.4％-1.2％，N：0.002-0.015％，Ca和 REM总量为0.0002-0.007％，余量为Fe和杂质，杂质含量最多为0.05％，S：0.005％以下，O：0.005％以下。 满足不等式的组成：0.8＆nlE; [Mn]×[Mo]＆nlE; 2.6其中[Mn]和[Mo]分别是以Mn和Mo的含量相当于以质量％计的数量。

公开(公告)号：US07780800B2

公开(公告)日：2010-08-24

申请号：US11819912

申请日：2007-06-29

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

IPC分类号： C21D8/10 ,  C21D9/08

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/10 ,  C21D9/085 ,  C21D9/50 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10S148/909

摘要： A bent pipe corresponding to at least API X100 grade and having a base metal with high strength and toughness and a weld metal with high toughness is provided. A steel plate prepared by cooling after hot rolling at a cooling rate at the central portion in the plate thickness direction of at most 5° C. per second at 700-500° C. is formed into a bend mother pipe, which is then heated to 900-1100° C. and subjected to bending, then it is cooled to a temperature of at most 300° C. at a cooling rate in the central portion of the thickness direction of at least 5° C. per second at 700-500° C., after which it is tempered at 300-500° C.

摘要翻译： 提供对应于至少API X100等级并具有高强度和韧性的母材和具有高韧性的焊接金属的弯管。 通过在700-500℃下以板状厚度方向的中央部的冷却速度以每秒5℃以上的冷却速度冷却而制成的钢板被形成为弯曲母管，然后将其加热 至900-1100℃，然后进行弯曲，然后在厚度方向的中心部分的冷却速度为700℃以上至少为5℃/秒的温度下， 500℃，然后在300-500℃下回火

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：US20080283160A1

公开(公告)日：2008-11-20

申请号：US11819912

申请日：2007-06-29

申请人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

发明人： Nobuaki Takahashi ,  Akio Yamamoto ,  Masahiko Hamada

IPC分类号： C21D9/08 ,  C22C38/00

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/10 ,  C21D9/085 ,  C21D9/50 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10S148/909

摘要： A bent pipe corresponding to at least API X100 grade and having a base metal with high strength and toughness and a weld metal with high toughness is provided. A steel plate prepared by cooling after hot rolling at a cooling rate at the central portion in the plate thickness direction of at most 5° C. per second at 700-500° C. is formed into a bend mother pipe, which is then heated to 900-1100° C. and subjected to bending, then it is cooled to a temperature of at most 300° C. at a cooling rate in the central portion of the thickness direction of at least 5° C. per second at 700-500° C., after which it is tempered at 300-500° C.

摘要翻译： 提供对应于至少API X100等级并具有高强度和韧性的母材和具有高韧性的焊接金属的弯管。 通过在700-500℃下以板状厚度方向的中央部的冷却速度以每秒5℃以上的冷却速度冷却而制成的钢板被形成为弯曲母管，然后将其加热 至900-1100℃，然后进行弯曲，然后在厚度方向的中心部分的冷却速度为700℃以上至少为5℃/秒的温度下， 500℃，然后在300-500℃下回火

公开(公告)号：US20080216928A1

公开(公告)日：2008-09-11

申请号：US12071517

申请日：2008-02-21

申请人： Kenji Kobayashi ,  Tomohiko Omura ,  Kunio Kondo ,  Yuji Arai ,  Nobuyuki Hisamune

发明人： Kenji Kobayashi ,  Tomohiko Omura ,  Kunio Kondo ,  Yuji Arai ,  Nobuyuki Hisamune

IPC分类号： C21D1/18 ,  C22C38/38 ,  C22C38/22

CPC分类号： C22C38/005 ,  C21D8/105 ,  C21D9/08 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10S148/909

摘要： A seamless steel pipe for line pipe having high strength and stable toughness and having resistance to sulfide corrosion cracking at low temperatures to room temperature is provided. A seamless steel pipe according to the present invention has a chemical composition comprising, in mass percent, C: 0.03-0.08%, Si: 0.05-0.5%, Mn: 1.0-3.0%, Mo: greater than 0.4% to 1.2%, Al: 0.005-0.100%, Ca: 0.001-0.005%, a remainder of Fe and impurities including N, P, S, O, and Cu, with the impurities containing at most 0.01% of N, at most 0.05% of P, at most 0.01% of S, at most 0.01% of O, and at most 0.1% of Cu, and having a microstructure comprising a bainitic-martensitic dual phase structure.

摘要翻译： 提供了一种具有高强度和稳定韧性并且在低温至室温下具有耐硫化物腐蚀开裂性的线管用无缝钢管。 根据本发明的无缝钢管具有以质量％计含有C：0.03-0.08％，Si：0.05-0.5％，Mn：1.0-3.0％，Mo：大于0.4％至1.2％的化学组成， Al：0.005-0.100％，Ca：0.001-0.005％，剩余的Fe和杂质包括N，P，S，O和Cu，杂质含量最多为0.01％，P最多为0.05％ 最多0.01％的S，至多0.01％的O和至多0.1％的Cu，并且具有包含贝氏体 - 马氏体双相结构的微结构。

公开(公告)号：US20070251606A1

公开(公告)日：2007-11-01

申请号：US11819523

申请日：2007-06-28

申请人： Kazuya Wakita ,  Katsuyuki Ikei ,  Hisaaki Kura

发明人： Kazuya Wakita ,  Katsuyuki Ikei ,  Hisaaki Kura

IPC分类号： C22C28/00

CPC分类号： B21K1/12 ,  B21K1/063 ,  C21D9/28 ,  F16C3/02 ,  F16C2204/62 ,  F16C2326/06 ,  Y10S148/909 ,  Y10T428/12965

摘要： A power transmission shaft having an improved strength and ensuring a stable torsion fatigue strength. The power transmission shaft has coupling members respectively provided on the opposite ends of an pipe part made of a steel material. The steel material includes 0.30-0.45% by weight of C, 0.05-0.35% by weight of Si, 1.0-2.0% by weight of Mn, 0.05% by weight or less of Al, 0.01% by weight or less of S, and the remainder (iron Fe and unavoidable impurities). The pipe part has an electro-unite portion that extends in the axial direction. The electro-unite portion and neighborhood thereof are hardened so as to have a Rockwell hardness HRC of 45 or more. Also, another power transmission shaft has coupling members integrally formed on opposite ends thereof. In addition, the shaft is formed from a steel element tube by a plastic working. The shaft has an inner diametrical surface which is subjected to a high-frequency induction hardening and tempering treatment to make the surface portion hardness of the inner diametrical surface to have a Rockwell hardness HRC of 35 or more.

摘要翻译： 具有改善的强度并确保稳定的扭转疲劳强度的动力传动轴。 动力传递轴具有分别设置在由钢材制成的管部分的相对端上的联接构件。 钢材含有0.30-0.45重量％的C，0.05-0.35重量％的Si，1.0-2.0重量％的Mn，0.05重量％以下的Al，0.01重量％以下的S，以及 余量（铁铁和不可避免的杂质）。 管部具有沿轴向延伸的电联结部。 电联合部分及其附近被硬化，使得洛氏硬度HRC为45以上。 此外，另一个动力传递轴具有一体地形成在其相对端上的联接构件。 此外，轴由塑料加工的钢质元件管形成。 轴具有内径面，经受高频感应淬火和回火处理，使内径表面的表面部分硬度具有35以上的洛氏硬度HRC。