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    Steel pipe for an airbag inflator and a process for its manufacture
    1.
    发明授权
    Steel pipe for an airbag inflator and a process for its manufacture 有权
    用于气囊充气机的钢管及其制造方法

    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。

    Steel pipe for an airbag inflator and a process for its manufacture
    2.
    发明申请
    Steel pipe for an airbag inflator and a process for its manufacture 有权
    用于气囊充气机的钢管及其制造方法

    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。

    High strength steel pipe for an air bag
    6.
    发明授权
    High strength steel pipe for an air bag 有权
    用于气囊的高强度钢管

    公开(公告)号：US07846274B2

    公开(公告)日：2010-12-07

    申请号：US10948581

    申请日：2004-09-24

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

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

    IPC分类号： C22C38/18

    CPC分类号： 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

    摘要： 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%, and also 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.

    摘要翻译： 为了制造气囊用钢管，能够应对气泡吹入的气体的压力增加，蓄压器的壁厚减小，组成质量％为C：0.05的钢 -0.20％，Si：0.1〜1.0％，Mn：0.20〜2.0％，P：0.025％以下，S：0.0％以下，Cr：0.05〜1.0％，Al：0.10％ Mo：0.50以下，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以下 ％，根据需要，还可以使用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。

    SEAMLESS STEEL PIPE FOR LINE PIPE AND METHOD FOR MANUFACTURING THE SAME
    8.
    发明申请
    SEAMLESS STEEL PIPE FOR LINE PIPE AND METHOD FOR MANUFACTURING THE SAME 有权
    用于线管的无缝钢管及其制造方法

    公开(公告)号：US20130000790A1

    公开(公告)日：2013-01-03

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

    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）。

    Seamless steel pipe for line pipe and method for manufacturing the same
    9.
    发明授权
    Seamless steel pipe for line pipe and method for manufacturing the same 有权
    管道无缝钢管及其制造方法

    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）。

    STEEL PIPE AS FUEL INJECTION PIPE
    10.
    发明申请
    STEEL PIPE AS FUEL INJECTION PIPE 有权
    钢管作为燃油喷射管

    公开(公告)号：US20090078341A1

    公开(公告)日：2009-03-26

    申请号：US12244641

    申请日：2008-10-02

    申请人： KIKUO ASADA ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

    发明人： KIKUO ASADA ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

    IPC分类号： C22C38/00

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

    摘要： 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.

    摘要翻译： 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。