公开(公告)号：US06878219B2

公开(公告)日：2005-04-12

申请号：US10304698

申请日：2002-11-27

Applicant: Kunio Kondo ,  Miyuki Yamamoto ,  Takashi Takano ,  Kenichi Beppu ,  Susumu Hirano ,  Keisuke Hitoshio ,  Hidetoshi Kurata

Inventor： Kunio Kondo ,  Miyuki Yamamoto ,  Takashi Takano ,  Kenichi Beppu ,  Susumu Hirano ,  Keisuke Hitoshio ,  Hidetoshi Kurata

IPC: B60R21/268 ,  C21D1/18 ,  C21D8/10 ,  C21D9/08 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C22C38/18

CPC classification number: C22C38/40 ,  B60R21/268 ,  C21D1/18 ,  C21D8/10 ,  C21D9/08 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

Abstract: In order to manufacture a steel pipe for an air bag which can cope with increase in the pressure of gas blown into an air bag and decreases in the wall thickness of an accumulator, a steel having a composition, mass %, of: C: 0.05-0.20%,Si: 0.1-1.0%,Mn: 0.20-2.0%, P: at most 0.025%,S: at most 0.010%,Cr: 0.05-1.0%, Al: at most 0.10%, if necessary at least one of Mo: at most 0.50%, Ni: at most 1.5%, Cu: at most 0.5%, V: at most 0.2%, Ti: at most 0.1%, Nb: at most 0.1%, and B: at most 0.005%, andalso if necessary, at least one of Ca: at most 0.01%, Mg: at most 0.01%, and REM (rare earth elements): at most 0.01%,and a remainder of Fe and impurities is used to produce a steel pipe, and the pipe is then subjected to cold working to predetermined dimensions, then to heating to a temperature of at least the Ac1 transformation temperature followed by quenching, and then to tempering at a temperature no higher than the Ac1 transformation temperature.

Abstract translation: 为了制造能够应对气泡吹入的气体的压力增加并且蓄压器的壁厚减小的气囊用钢管，具有质量％的组成，如果需要， Mo：至少0.50％，Ni：1.5％以下，Cu：0.5％以下，V：0.2％以下，Ti：0.1％以下，Nb：0.1％以下，B： 0.005％，如果需要，可以使用Ca：0.01％以下，Mg：0.01％以下，REM（稀土元素）：0.01％以下，Fe和杂质的余量中的至少一种， 然后将管冷却至预定尺寸，然后加热至至少Ac1相变温度，然后淬火，然后在不高于Ac1转变温度的温度下回火。

公开(公告)号：US20130000790A1

公开(公告)日：2013-01-03

申请号：US13609837

申请日：2012-09-11

Applicant: Yuji ARAI ,  Keisuke Hitoshio

Inventor： Yuji ARAI ,  Keisuke Hitoshio

IPC: F16L9/02 ,  C21D8/10 ,  C21D11/00

CPC classification number: C21D9/08 ,  C21D8/105 ,  C22C38/22 ,  C22C38/24

Abstract: 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

Abstract translation: 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：US20090078341A1

公开(公告)日：2009-03-26

申请号：US12244641

申请日：2008-10-02

Applicant: KIKUO ASADA ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

Inventor： KIKUO ASADA ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

IPC: C22C38/00

CPC classification number: C22C38/02 ,  C21D8/10 ,  C21D9/08 ,  C21D9/14 ,  C21D2211/004 ,  C22C38/04 ,  F02M55/02 ,  F02M61/166 ,  F02M2200/03 ,  F02M2200/9053 ,  Y10S148/909

Abstract: To provide a steel pipe as a fuel injection pipe with high material strength, high internal pressure limit free from fatigue failure, prolonged fatigue life, and high reliability. A steel pipe as a fuel injection pipe of 500 N/mm2 or higher tensile strength comprising, by mass, C: 0.12 to 0.27%, Si: 0.05 to 0.40%, and Mn: 0.8 to 2.0%, and the balance being Fe and impurities, the contents of Ca, P, and S in the impurities being Ca: 0.001% or less, P: 0.02% or less, and S: 0.01% or less, respectively, characterized in that the maximum diameter of nonmetallic inclusions present in at least in a region extending from the inner surface of the steel pipe to a depth of 20 μm is 20 μm or less. Further, this steel pipe may contain, in place of a portion of Fe, at least one selected from among Cr: 1% or less, Mo: 1% or less, Ti: 0.04% or less, Nb: 0.04% or less, and V: 0.1% or less.

Abstract translation: 提供具有高材料强度的钢管作为燃料喷射管，没有疲劳破坏的高内压极限，延长的疲劳寿命和高可靠性。 作为500N / mm 2以上的拉伸强度的燃料喷射管的钢管，以质量计C：0.12〜0.27％，Si：0.05〜0.40％，Mn：0.8〜2.0％，余量为Fe， 杂质中Ca，P，S的含量分别为Ca：0.001％以下，P：0.02％以下，S：0.01％以下，其特征在于，非金属夹杂物的最大直径存在于 至少在从钢管的内表面延伸到20μm的深度的区域中，为20μm以下。 此外，该钢管可以含有选自Cr：1％以下，Mo：1％以下，Ti：0.04％以下，Nb：0.04％以下的至少一种，代替Fe的一部分， V：0.1％以下。

公开(公告)号：US20120267014A1

公开(公告)日：2012-10-25

申请号：US13540016

申请日：2012-07-02

Applicant: Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

Inventor： Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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

Applicant: Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

Inventor： Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

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

CPC classification number: C21D9/08 ,  B60R21/268

Abstract: 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.

Abstract translation: 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

Applicant: Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

Inventor： Takashi Takano ,  Yuji Arai ,  Kunio Kondo ,  Keisuke Hitoshio

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

CPC classification number: C21D9/08 ,  B60R21/268

Abstract: 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

Abstract translation: 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：US20050266927A1

公开(公告)日：2005-12-01

申请号：US11191909

申请日：2005-07-29

Applicant: Kouichi Kuroda ,  Tatsuya Okui ,  Keisuke Hitoshio

Inventor： Kouichi Kuroda ,  Tatsuya Okui ,  Keisuke Hitoshio

IPC: B21B17/02 ,  B21B17/14 ,  B21B19/04 ,  B21B23/00 ,  B21B27/02 ,  F16D3/16

CPC classification number: B21B17/02 ,  B21B17/14 ,  B21B19/04 ,  B21B23/00 ,  B21B27/02

Abstract: A steel tube hot-finished by the Mannesmann tube-making method is subjected to a simple grinding process for the inner surface, and thereafter to a cold drawing, so that the depth d of the concave portion in the concavo-convex profile forming the inner surface of the steel tube, the surface roughness Ra and the width w of the entrance in the concave portion are specified, or similarly the depth d of the concave portion in the concavo-convex profile, the Vickers hardness Hv of the inner surface layer and the width w of the entrance in the concave portion are specified, hollow parts for a drive shaft, which have an excellent fatigue strength and which is optimal to reduce the weight of a car body, can be produced. Accordingly, the application of the manufacturing method according to the present invention allows drive shafts for automobiles to be efficiently produced in a reduced manufacturing cost, thereby providing a significant advantage in the industry.

Abstract translation: 通过曼内斯曼管制造方法热轧的钢管对内表面进行简单的研磨处理，然后进行冷拉伸，使得凹凸轮廓中的凹部的深度d形成内部 规定了钢管的表面，凹部的入口的表面粗糙度Ra和宽度w，或类似地，凹凸型的凹部的深度d，内表面层的维氏硬度Hv， 规定了凹部的入口宽度w，可以制造具有优异的疲劳强度并且最适于减轻车体重量的用于驱动轴的中空部件。 因此，根据本发明的制造方法的应用允许以降低的制造成本有效地生产用于汽车的驱动轴，从而在工业中提供显着的优点。

公开(公告)号：US09175360B2

公开(公告)日：2015-11-03

申请号：US13540016

申请日：2012-07-02

Applicant: Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

Inventor： Keisuke Hitoshio ,  Kunio Kondo ,  Yuji Arai

IPC: 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 classification number: 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

Abstract: 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.

Abstract translation: 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

Applicant: Yuji Arai ,  Keisuke Hitoshio

Inventor： Yuji Arai ,  Keisuke Hitoshio

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

CPC classification number: C21D9/08 ,  C21D8/105 ,  C22C38/22 ,  C22C38/24

Abstract: 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

Abstract translation: 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：US08147623B2

公开(公告)日：2012-04-03

申请号：US12244641

申请日：2008-10-02

Applicant: Kikuo Asada ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

Inventor： Kikuo Asada ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

IPC: C22C38/02 ,  C22C38/04

CPC classification number: C22C38/02 ,  C21D8/10 ,  C21D9/08 ,  C21D9/14 ,  C21D2211/004 ,  C22C38/04 ,  F02M55/02 ,  F02M61/166 ,  F02M2200/03 ,  F02M2200/9053 ,  Y10S148/909

Abstract: To provide a steel pipe as a fuel injection pipe with high material strength, high internal pressure limit free from fatigue failure, prolonged fatigue life, and high reliability. A steel pipe as a fuel injection pipe of 500 N/mm2 or higher tensile strength comprising, by mass, C: 0.12 to 0.27%, Si: 0.05 to 0.40%, and Mn: 0.8 to 2.0%, and the balance being Fe and impurities, the contents of Ca, P, and S in the impurities being Ca: 0.001% or less, P: 0.02% or less, and S: 0.01% or less, respectively, characterized in that the maximum diameter of nonmetallic inclusions present in at least in a region extending from the inner surface of the steel pipe to a depth of 20 μm is 20 μm or less. Further, this steel pipe may contain, in place of a portion of Fe, at least one selected from among Cr: 1% or less, Mo: 1% or less, Ti: 0.04% or less, Nb: 0.04% or less, and V: 0.1% or less.

Abstract translation: 提供具有高材料强度的钢管作为燃料喷射管，没有疲劳破坏的高内压极限，延长的疲劳寿命和高可靠性。 作为500N / mm 2以上的拉伸强度的燃料喷射管的钢管，以质量计C：0.12〜0.27％，Si：0.05〜0.40％，Mn：0.8〜2.0％，余量为Fe， 杂质中Ca，P，S的含量分别为Ca：0.001％以下，P：0.02％以下，S：0.01％以下，其特征在于，非金属夹杂物的最大直径存在于 至少在从钢管的内表面延伸到20μm的深度的区域中，为20μm以下。 此外，该钢管可以含有选自Cr：1％以下，Mo：1％以下，Ti：0.04％以下，Nb：0.04％以下的至少一种，代替Fe的一部分， V：0.1％以下。