公开(公告)号：US20120267014A1

公开(公告)日：2012-10-25

申请号：US13540016

申请日：2012-07-02

申请人： Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

发明人： Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

IPC分类号： C21D9/08 ,  C22C38/04 ,  C22C38/18 ,  C22C38/08 ,  C22C38/38 ,  C22C38/02 ,  C22C38/16

CPC分类号： C21D8/105 ,  C21D1/18 ,  C21D9/08 ,  C21D9/085 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  F16L9/02

摘要： There is provided a method for manufacturing a seamless steel pipe for line pipe, capable of improving the toughness of the seamless steel pipe for line pipe. A round billet having a chemical composition, by mass percent, of C: 0.02 to 0.15%, Si: at most 0.5%, and Mn: 0.5 to 2.5%, the balance being Fe and impurities, is heated. The heated round billet is piercing-rolled to produce a hollow shell. The hollow shell is elongated and rolled and sized to produce a seamless steel pipe. The seamless steel pipe is water cooled, and the water cooling is stopped when the temperature of the seamless steel pipe reaches at most 450° C. The water-cooled seamless steel pipe is quenched, and the quenched seamless steel pipe is tempered.

摘要翻译： 提供一种能够提高线管用无缝钢管的韧性的管线管用无缝钢管的制造方法。 将化学组成按C：0.02〜0.15％，Si：0.5％以下，Mn：0.5〜2.5％的化学组成的圆坯加热，其余为Fe和杂质。 加热的圆形坯料被穿孔轧制以制造中空壳体。 中空的外壳是细长的并且被轧制和大小以产生无缝钢管。 无缝钢管水冷却，当无缝钢管的温度达到450℃以上时，水冷停止。水冷无缝钢管淬火，淬火无缝钢管回火。

公开(公告)号：US07566416B2

公开(公告)日：2009-07-28

申请号：US11260369

申请日：2005-10-28

申请人： Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

发明人： Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

IPC分类号： C22C38/18 ,  C22C38/00 ,  C21D9/08 ,  B60R21/26

CPC分类号： C21D9/08 ,  B60R21/268

摘要： A steel pipe for an airbag inflator having a high strength of at least 900 MPa and preferably at least 1000 MPa in tensile strength along with a high toughness and exhibiting good resistance to bursting such that it has no propagation of cracks in a burst test at −40° C. or below is manufactured by quenching a pipe of a steel comprising, in mass %, C: 0.05-0.20 %, Si: 0.1-1.0 %, P: at most 0.025 %, S: at most 0.010 %, Cr: 0.05-1.45 %, Al: at most 0.10 %, and one or both of Ti and Mn satisfying Ti≦0.02% and 0.4%≦Mn+40Ti≦1.2% from a temperature of at least the Ac1 transformation point of the steel, tempering the pipe at a temperature lower than the Ac1 transformation point, applying cold working to it with a reduction of area of at most 65%, and subjecting it to stress relief annealing at a temperature lower than the Ac1 transformation point. The ratio L/T of the X-ray integrated intensity ratio of the {110} plane measured for the cross section perpendicular to the axial direction L of the steel pipe to that measured for the cross section perpendicular to the circumferential direction T is at most 50.

摘要翻译： 一种用于气囊充气机的钢管，其具有高强度至少900MPa，优选至少1000MPa的拉伸强度以及高韧性并且表现出良好的抗爆裂性，使得其在爆破试验中不会发生裂纹， 40℃以下是通过以质量％C：0.05〜0.20％，Si：0.1〜1.0％，P：0.025％以下，S：0.010％以下，Cr： ：0.05-1.45％，Al：至多0.10％，并且从至少Ac1相变点的温度至少满足Ti <0.02％和0.4％<= Mn + 40Ti <= 1.2％的Ti和Mn中的一种或两种 钢在低于Ac1相变点的温度下回火管道，以至少65％的面积减少对其进行冷加工，并在低于Ac1相变点的温度下进行应力消除退火。 与垂直于圆周方向T的横截面测量的垂直于钢管的轴线方向L的横截面测量的{110}面的X射线积分强度比的比L / T最多 50。

公开(公告)号：US20060124211A1

公开(公告)日：2006-06-15

申请号：US11260369

申请日：2005-10-28

申请人： Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

发明人： Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

IPC分类号： C21D9/08 ,  C22C38/12 ,  B60R21/26

CPC分类号： C21D9/08 ,  B60R21/268

摘要： A steel pipe for an airbag inflator having a high strength of at least 900 MPa and preferably at least 1000 MPa in tensile strength along with a high toughness and exhibiting good resistance to bursting such that it has no propagation of cracks in a burst test at −40° C. or below is manufactured by quenching a pipe of a steel comprising, in mass %, C: 0.05-0.20 %, Si: 0.1-1.0 %, P: at most 0.025 %, S: at most 0.010 %, Cr: 0.05-1.45 %, Al: at most 0.10 %, and one or both of Ti and Mn satisfying Ti

摘要翻译： 一种用于气囊充气机的钢管，其具有高强度至少900MPa，优选至少1000MPa的拉伸强度以及高韧性并且表现出良好的抗爆裂性，使得其在爆破试验中不会发生裂纹， 40℃以下是通过以质量％C：0.05〜0.20％，Si：0.1〜1.0％，P：0.025％以下，S：0.010％以下，Cr： ：0.05-1.45％，Al：至多0.10％，并且从至少Ac 1的温度满足Ti <0.02％和0.4％<= Mn + 40Ti <= 1.2％的Ti和Mn中的一种或两种 转化点，在低于Ac 1 H 1相变点的温度下回火管道，以至少65％的面积减少进行冷加工，并对其进行处理 在低于Ac 1 H 1相变点的温度下进行应力消除退火。 与垂直于圆周方向T的横截面测量的垂直于钢管的轴线方向L的横截面测量的{110}面的X射线积分强度比的比L / T最多 50。

公开(公告)号：US09175360B2

公开(公告)日：2015-11-03

申请号：US13540016

申请日：2012-07-02

申请人： Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

发明人： Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

IPC分类号： C21D9/08 ,  C22C38/00 ,  C22C38/08 ,  C21D8/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C21D1/18 ,  F16L9/02

CPC分类号： C21D8/105 ,  C21D1/18 ,  C21D9/08 ,  C21D9/085 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  F16L9/02

摘要： There is provided a method for manufacturing a seamless steel pipe for line pipe, capable of improving the toughness of the seamless steel pipe for line pipe. A round billet having a chemical composition, by mass percent, of C: 0.02 to 0.15%, Si: at most 0.5%, and Mn: 0.5 to 2.5%, the balance being Fe and impurities, is heated. The heated round billet is piercing-rolled to produce a hollow shell. The hollow shell is elongated and rolled and sized to produce a seamless steel pipe. The seamless steel pipe is water cooled, and the water cooling is stopped when the temperature of the seamless steel pipe reaches at most 450° C. The water-cooled seamless steel pipe is quenched, and the quenched seamless steel pipe is tempered.

摘要翻译： 提供一种能够提高线管用无缝钢管的韧性的管线管用无缝钢管的制造方法。 将化学组成按C：0.02〜0.15％，Si：0.5％以下，Mn：0.5〜2.5％的化学组成的圆坯加热，其余为Fe和杂质。 加热的圆形坯料被穿孔轧制以制造中空壳体。 中空的外壳是细长的并且被轧制和大小以产生无缝钢管。 无缝钢管水冷却，当无缝钢管的温度达到450℃以上时，水冷停止。水冷无缝钢管淬火，淬火无缝钢管回火。

公开(公告)号：US08709174B2

公开(公告)日：2014-04-29

申请号：US13609837

申请日：2012-09-11

申请人： Yuji Arai ,  Keisuke Hitoshio

发明人： Yuji Arai ,  Keisuke Hitoshio

IPC分类号： C22C38/00 ,  C21D11/00 ,  C21D9/08 ,  C22C38/12

CPC分类号： C21D9/08 ,  C21D8/105 ,  C22C38/22 ,  C22C38/24

摘要： A seamless steel pipe for line pipe having high strength and high toughness contains, by mass percent, C: 0.02 to 0.10%, Si: at most 0.5%, Mn: 0.5 to 2.0%, Al: 0.01 to 0.1%, P: at most 0.03%, S: at most 0.005%, Ca: at most 0.005%, and N: at most 0.007%, and further contains at least one selected from a group consisting of Ti: at most 0.008%, V: less than 0.06%, and Nb: at most 0.05%, the balance being Fe and impurities. A carbon equivalent Ceq defined by Formula (1) is at least 0.38, a content of Ti, V and Nb satisfies Formula (2), and the size of carbo-nitride containing at least one of Ti, V, Nb and Al is at most 200 nm, Ceq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15  (1) Ti+V+Nb

摘要翻译： 具有高强度，高韧性的线管用无缝钢管以质量％计含有C：0.02〜0.10％，Si：0.5％以下，Mn：0.5〜2.0％，Al：0.01〜0.1％，P：at 最多0.03％，S：0.005％以下，Ca：0.005％以下，N：0.007％以下，进一步含有选自Ti：0.008％以下，V：0.06以下的至少1种 ％，Nb：0.05％以下，余量为Fe和杂质。 由式（1）定义的碳当量Ceq至少为0.38，Ti，V和Nb的含量满足式（2），并且含有Ti，V，Nb和Al中的至少一种的碳氮化物的尺寸在 最大200nm，Ceq = C + Mn / 6 +（Cr + Mo + V）/ 5 +（Ni + Cu）/ 15（1）Ti + V + Nb <0.06（2）。

公开(公告)号：US07896985B2

公开(公告)日：2011-03-01

申请号：US12071493

申请日：2008-02-21

申请人： Yuji Arai ,  Kunio Kondo ,  Nobuyuki Hisamune

发明人： Yuji Arai ,  Kunio Kondo ,  Nobuyuki Hisamune

IPC分类号： C21D9/08 ,  C22C38/44

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 a high strength and good toughness and corrosion resistance even though having a thick wall 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% to 1.2%, N: 0.002-0.015%, Ca: 0.0002-0.007%, and a remainder of Fe and impurities, wherein the contents of the impurities are at most 0.03% for P, at most 0.005% for S, at most 0.005% for O and less than 0.0005% for B and wherein the value of Pcm calculated by the following Equation (1) is at least 0.185 and at most 0.250. The steel pipe has a microstructure which primarily comprises bainite and which has a length of cementite of at most 20 micrometers: Pcm=[C]+[Si]/30+([Mn]+[Cr]+[Cu])/20+[Mo]/15+[V]/10+5[B]  (1) wherein [C], [Si], [Mn], [Cr], [Cu], [Mo], [V] and [B] are numbers respectively indicating the content in mass percent of C, Si, Mn, Cr, Cu, Mo, V and B.

摘要翻译： 即使具有厚壁，也具有高强度，良好的韧性和耐腐蚀性的线管用无缝钢管，其化学成分的质量百分比含有C：0.02〜0.08％，Si：0.5％以下，Mn：1.5 -3.0％，Al：0.001-0.10％，Mo：大于0.4％-1.2％，N：0.002-0.015％，Ca：0.0002-0.007％，余量为Fe和杂质，杂质含量为 P最多为0.03％，S为0.005％以下，O为0.005％以下，B为0.0005％以下，其中，通过下述式（1）计算出的Pcm值为0.185以上且0.250以下。 钢管具有主要包括贝氏体并且具有至多20微米的渗碳体长度的微结构：Pcm = [C] + [Si] / 30 +（[Mn] + [Cr] + [Cu]）/ 20 + [Mo] / 15 + [V] / 10 + 5 [B]（1）其中〔C〕，〔Si〕，〔Mn〕，〔Cr〕，〔Cu〕，〔Mo〕，〔V〕， B]是分别表示C，Si，Mn，Cr，Cu，Mo，V和B的质量含量的数字。

公开(公告)号：US20090114318A1

公开(公告)日：2009-05-07

申请号：US12071493

申请日：2008-02-21

申请人： Yuji Arai ,  Kunio Kondo ,  Nobuyuki Hisamune

发明人： Yuji Arai ,  Kunio Kondo ,  Nobuyuki Hisamune

IPC分类号： C21D9/08 ,  C22C38/00 ,  C22C38/04

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 a high strength and good toughness and corrosion resistance even though having a thick wall 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% to 1.2%, N: 0.002-0.015%, Ca: 0.0002-0.007%, and a remainder of Fe and impurities, wherein the contents of the impurities are at most 0.03% for P, at most 0.005% for S, at most 0.005% for O and less than 0.0005% for B and wherein the value of Pcm calculated by the following Equation (1) is at least 0.185 and at most 0.250. The steel pipe has a microstructure which primarily comprises bainite and which has a length of cementite of at most 20 micrometers: Pcm=[C]+[Si]/30+([Mn]+[Cr]+[Cu])/20+[Mo]/15+[V]/10+5[B]  (1) wherein [C], [Si], [Mn], [Cr], [Cu], [Mo], [V] and [B] are numbers respectively indicating the content in mass percent of C, Si, Mn, Cr, Cu, Mo, V and B.

摘要翻译： 即使具有厚壁，也具有高强度，良好的韧性和耐腐蚀性的线管用无缝钢管，其化学成分的质量百分比含有C：0.02〜0.08％，Si：0.5％以下，Mn：1.5 -3.0％，Al：0.001-0.10％，Mo：大于0.4％-1.2％，N：0.002-0.015％，Ca：0.0002-0.007％，余量为Fe和杂质，杂质含量为 P最多为0.03％，S为0.005％以下，O为0.005％以下，B为0.0005％以下，其中，通过下述式（1）计算出的Pcm值为0.185以上且0.250以下。 钢管具有主要包括贝氏体并且具有至多20微米的渗碳体长度的微结构：<？在线公式描述=“在线公式”end =“lead”？> Pcm = [C] + [Si] / 30 +（[Mn] + [Cr] + [Cu]）/ 20+ [Mo] / 15 + [V] / 10 + 5 [B]（1） 其中[C]，[Si]，[Mn]，[Cr]，[Cu]，[Mo]，[V]和[B]分别表示 C，Si，Mn，Cr，Cu，Mo，V和B的质量含量。

公开(公告)号：US07458426B2

公开(公告)日：2008-12-02

申请号：US11790874

申请日：2007-04-27

申请人： Yuji Arai ,  Kunio Kondo ,  Hisashi Amaya ,  Akihito Yamane

发明人： Yuji Arai ,  Kunio Kondo ,  Hisashi Amaya ,  Akihito Yamane

IPC分类号： E21B43/10 ,  E21B29/00 ,  C22C38/00

CPC分类号： C22C38/02 ,  B21C1/24 ,  C21D9/085 ,  C22C38/04 ,  C22C38/12 ,  C22C38/22 ,  E21B43/103

摘要： (1) A steel pipe that is expanded radially in a state wherein it was inserted in a well such as an oil well, characterized in that the non-uniform wall thickness ratio E0 (%) before expanding satisfies the following expression {circle around (1)}. E0≦30/(1+0.018α)  {circle around (1)} Wherein α is the pipe expansion ratio (%) calculated by the following expression {circle around (2)}. α=[(inner diameter of the pipe after expanding−inner diameter of the pipe before expanding)/inner diameter of the pipe before expanding]×100  {circle around (2)} (2) A steel pipe that should be expanded radially in a state wherein it is inserted in a well, such as an oil well, characterized in that the eccentric non-uniform wall thickness ratio is 10% or less.When the embedding-expanding method is performed with use of the steel pipe of (1) or (2), lowering of collapse strength of the expanded steel pipe is prevented and bending thereof can be decreased.

摘要翻译： （1）一种钢管，其在将其插入诸如油井的井中的状态下径向膨胀，其特征在于，膨胀前的不均匀壁厚比E0（％）满足以下表达式{ E0 <= 30 /（1 + 0.018alpha）{圈内（1 <？in-line-formula description =“in-line-formula description =” 其中，α是通过以下表达式计算的管道膨胀率（％）{circle around（2. <？in-line-formula description =“In-line Formulas”end = α= [（膨胀后的管内径 - 膨胀前的管的内径）/扩管前的内径]×100 {圆周（2 <？在线配方说明=“ 在线公式“end =”tail“？>（2）在其插入诸如油井的井中的状态下应该径向膨胀的钢管，其特征在于，所述偏心不均匀壁厚 比例为10％以下 。 当使用（1）或（2）的钢管进行埋入膨胀方法时，防止扩大钢管的塌陷强度的降低，并且可以降低其弯曲。

公开(公告)号：US20070199720A1

公开(公告)日：2007-08-30

申请号：US11790874

申请日：2007-04-27

申请人： Yuji Arai ,  Kunio Kondo ,  Hisashi Amaya ,  Akihito Yamane

发明人： Yuji Arai ,  Kunio Kondo ,  Hisashi Amaya ,  Akihito Yamane

IPC分类号： E21B19/16

CPC分类号： C22C38/02 ,  B21C1/24 ,  C21D9/085 ,  C22C38/04 ,  C22C38/12 ,  C22C38/22 ,  E21B43/103

摘要： (1) A steel pipe that is expanded radially in a state wherein it was inserted in a well such as an oil well, characterized in that the non-uniform wall thickness ratio E0 (%) before expanding satisfies the following expression {circle around (1)}. E0≦30 /(1+0.018α)  {circle around (1)}Wherein α is the pipe expansion ratio (%) calculated by the following expression {circle around (2)}. α=[(inner diameter of the pipe after expanding−inner diameter of the pipe before expanding)/inner diameter of the pipe before expanding]×100  {circle around (2)}(2) A steel pipe that should be expanded radially in a state wherein it is inserted in a well, such as an oil well, characterized in that the eccentric non-uniform wall thickness ratio is 10% or less. When the embedding-expanding method is performed with use of the steel pipe of (1) or (2), lowering of collapse strength of the expanded steel pipe is prevented and bending thereof can be decreased.

摘要翻译： （1）一种钢管，其在将其插入诸如油井的井中的状态下径向膨胀，其特征在于，膨胀前的不均匀壁厚比E0（％）满足以下表达式{ <？in-line-formula description =“In-line Formulas”end =“lead”？> E0 <= 30 /(1+0.018alpha）{circle around（1 <？in-line-formula description =“ 其中，α是通过以下表达式计算的管道膨胀率（％）{circle around（2. <？in-line-formula description =“In-line Formulas”end = α= [（膨胀后的管内径 - 膨胀前的管的内径）/扩管前的内径]×100 {圆周（2 <？在线配方说明=“ 在线公式“end =”tail“？>（2）在其插入诸如油井的井中的状态下应该径向膨胀的钢管，其特征在于，所述偏心不均匀壁厚 比例为10％ s。 当使用（1）或（2）的钢管进行埋入膨胀方法时，防止扩大钢管的塌陷强度的降低，并且可以降低其弯曲。

公开(公告)号：US07225868B2

公开(公告)日：2007-06-05

申请号：US10651941

申请日：2003-09-02

申请人： Yuji Arai ,  Kunio Kondo ,  Hisashi Amaya ,  Akihito Yamane

发明人： Yuji Arai ,  Kunio Kondo ,  Hisashi Amaya ,  Akihito Yamane

IPC分类号： E21B43/10 ,  E21B29/00 ,  C22C38/00

CPC分类号： C22C38/02 ,  B21C1/24 ,  C21D9/085 ,  C22C38/04 ,  C22C38/12 ,  C22C38/22 ,  E21B43/103

摘要： (1) A steel pipe that is expanded radially in a state wherein it was inserted in a well such as an oil well, characterized in that the non-uniform wall thickness ratio E0 (%) before expanding satisfies the following expression {circle around (1)}. E0≦30/(1+0.018α){circle around (1)} Wherein α is the pipe expansion ratio (%) calculated by the following expression {circle around (2)}. α=[(inner diameter of the pipe after expanding−inner diameter of the pipe before expanding)/inner diameter of the pipe before expanding]×100{circle around (2)} (2) A steel pipe that should be expanded radially in a state wherein it is inserted in a well, such as an oil well, characterized in that the eccentric non-uniform wall thickness ratio is 10% or less.When the embedding-expanding method is performed with use of the steel pipe of (1) or (2), lowering of collapse strength of the expanded steel pipe is prevented and bending thereof can be decreased.

摘要翻译： （1）一种钢管，其在将其插入诸如油井的井中的状态下径向膨胀，其特征在于，膨胀前的不均匀壁厚比E0（％）满足以下表达式{ E0 <= 30 /（1 + 0.018alpha）{圈内（1 <？in-line-formula description =“in-line-formula description =” 其中，α是通过以下表达式计算的管道膨胀率（％）{circle around（2. <？in-line-formula description =“In-line Formulas”end = α= [（膨胀后的管内径 - 膨胀前的管的内径）/扩管前的内径]×100 {圆周（2 <？在线配方说明=“ 在线公式“end =”tail“？>（2）在其插入诸如油井的井中的状态下应该径向膨胀的钢管，其特征在于，所述偏心不均匀壁厚 比例为10％以下。 当使用（1）或（2）的钢管进行埋入膨胀方法时，防止扩大钢管的塌陷强度的降低，并且可以降低其弯曲。