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    • 64. 发明授权
    • Seamless steel pipe for line pipe and a process for its manufacture
    • 管道无缝钢管及其制造工艺
    • US07896985B2
    • 2011-03-01
    • US12071493
    • 2008-02-21
    • Yuji AraiKunio KondoNobuyuki Hisamune
    • Yuji AraiKunio KondoNobuyuki Hisamune
    • C21D9/08C22C38/44
    • C22C38/005C21D8/105C21D9/08C22C38/001C22C38/04C22C38/06C22C38/12Y10S148/909
    • 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.
    • 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。
    • 65. 发明授权
    • Steel pipe for an airbag inflator and a process for its manufacture
    • 用于气囊充气机的钢管及其制造方法
    • US07566416B2
    • 2009-07-28
    • US11260369
    • 2005-10-28
    • Takashi TakanoYuji AraiKunio KondoKeisuke Hitoshio
    • Takashi TakanoYuji AraiKunio KondoKeisuke Hitoshio
    • C22C38/18C22C38/00C21D9/08B60R21/26
    • C21D9/08B60R21/268
    • 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.
    • 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。
    • 66. 发明申请
    • Seamless steel pipe for line pipe and a process for its manufacture
    • 管道无缝钢管及其制造工艺
    • US20090114318A1
    • 2009-05-07
    • US12071493
    • 2008-02-21
    • Yuji AraiKunio KondoNobuyuki Hisamune
    • Yuji AraiKunio KondoNobuyuki Hisamune
    • C21D9/08C22C38/00C22C38/04
    • C22C38/005C21D8/105C21D9/08C22C38/001C22C38/04C22C38/06C22C38/12Y10S148/909
    • 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.
    • 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。
    • 69. 发明授权
    • Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipe
    • 埋管扩管用钢管,埋管扩孔油井钢管方法
    • US07458426B2
    • 2008-12-02
    • US11790874
    • 2007-04-27
    • Yuji AraiKunio KondoHisashi AmayaAkihito Yamane
    • Yuji AraiKunio KondoHisashi AmayaAkihito Yamane
    • E21B43/10E21B29/00C22C38/00
    • C22C38/02B21C1/24C21D9/085C22C38/04C22C38/12C22C38/22E21B43/103
    • (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.
    • (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。