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21 条记录 (耗时 0.016 秒)

    Stainless steel tube for automobile structure
    1.
    发明授权
    Stainless steel tube for automobile structure 失效
    汽车结构用不锈钢管

    公开(公告)号：US06755919B2

    公开(公告)日：2004-06-29

    申请号：US10089035

    申请日：2002-03-26

    申请人： Takaaki Toyooka ,  Akira Yorifuji ,  Makoto Kitazawa ,  Yoshikazu Kawabata ,  Motoaki Itadani ,  Masatoshi Aratani ,  Takatoshi Okabe

    发明人： Takaaki Toyooka ,  Akira Yorifuji ,  Makoto Kitazawa ,  Yoshikazu Kawabata ,  Motoaki Itadani ,  Masatoshi Aratani ,  Takatoshi Okabe

    IPC分类号： C22C3818

    CPC分类号： C21D8/10 ,  C21D8/105 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

    摘要： A stainless steel tube having excellent formability for secondary operation comprises: a chemical composition including not more than 0.20 mass % of C; not more than 1.5 mass % of Si; not more than 2.0 mass % of Mn; 10-18 mass % of Cr; not more than 0.03 mass % of N; or further at least one type of element selected from the group of: not more than 0.6 mass % of Cu; not more than 0.6 mass % of Ni; not more than 2.5 mass % of Mo; not more than 1.0 mass % of Nb; not more than 1.0 mass % of Ti; and not more than 1.0 mass % of V; Fe as the remainder and the inevitable impurities; and a structure constituted of ferrite or ferrite and martensite, wherein the TE value defined by the following formula exceeds 25,000 Mpa·%, TE=TS×(El+21.9) TS represents the tensile strength in the tube axial direction, and El represents the elongation in such direction.

    摘要翻译： 对于二次操作具有优异成形性的不锈钢管包括：不超过0.20质量％的C的化学组成; 不超过1.5质量％的Si; 不大于2.0质量％的Mn; 10-18质量％Cr; 不大于0.03质量％的N; 或另外至少一种选自以下的元素中的至少一种：不大于0.6质量％的Cu; 不大于0.6质量％的Ni; 不大于2.5质量％的Mo; 不大于1.0质量％的Nb; 不大于1.0质量％的Ti; 不大于1.0质量％的V; Fe作为剩余部分和不可避免的杂质; 以及由铁素体或铁素体和马氏体组成的结构，其中由下式定义的TE值超过25,000Mpa％，TE = TSx（E1 + 21.9）TS表示管轴向的拉伸强度，E1表示伸长率 在这个方向。

    Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe
    3.
    发明授权
    Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe 失效
    无缝钢管轧制操作用插头芯棒，无缝钢管制造方法

    公开(公告)号：US06202463B1

    公开(公告)日：2001-03-20

    申请号：US09214935

    申请日：1999-01-15

    申请人： Akira Yorifuji ,  Takaaki Toyooka ,  Taro Kanayama

    发明人： Akira Yorifuji ,  Takaaki Toyooka ,  Taro Kanayama

    IPC分类号： B21B1710

    CPC分类号： B21B25/00

    摘要： This invention provide a plug and a mandrel bar for use in rolling a seamless steel pipe of which life can be substantially improved more than that of the prior art under a severe condition of use always exposed to a high temperature and high load. The entire plug or the mandrel bar or at least the surface layer of the extremity end and the work section of it is made of ceramics. In addition, this invention provides a method for manufacturing a seamless steel pipe using such a plug or mandrel bar as described above.

    摘要翻译： 本发明提供了一种用于轧制无缝钢管的塞子和芯棒，其在始终暴露于高温高负荷的苛刻条件下，寿命比现有技术大大提高。 整个塞子或芯棒或至少其端部的表面层和其工作部分由陶瓷制成。 此外，本发明提供一种使用如上所述的塞子或芯棒来制造无缝钢管的方法。

    Welded steel pipe having excellent hydroformability and method for making the same
    4.
    发明授权
    Welded steel pipe having excellent hydroformability and method for making the same 失效
    具有优异的液压成形性的焊接钢管及其制造方法

    公开(公告)号：US06749954B2

    公开(公告)日：2004-06-15

    申请号：US10161407

    申请日：2002-05-31

    申请人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

    发明人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

    IPC分类号： B32B1518

    CPC分类号： B21D26/047 ,  B21B3/02 ,  B21B17/14 ,  B21B45/004 ,  B21C37/06 ,  B21D26/039 ,  B21D26/043 ,  C21D8/10 ,  Y10T428/12965

    摘要： A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition containing, on the basis of mass percent: about 0.03% to about 0.2% C, about 2.0% or less of Si, not less than about 1.0% to about 1.5% Mn, about 0.1% or less of P, about 0.01% or less of S, about 1.0% or less of Cr, about 0.1% or less of Al, about 0.1% or less of Nb, about 0.1% or less of Ti, about 0.1% or less of V, and about 0.01% or less of N; and by reduction-rolling the treated steel pipe at a cumulative reduction rate of at least about 35% and a final rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of at least about 590 MPa and an n×r product of at least about 0.22. The treated steel pipe is preferably reduction-rolled at a cumulative reduction rate of at least about 20% below the Ar3 transformation point.

    摘要翻译： 焊接钢管是通过加热或浸渍具有钢质组成的未经处理的焊接钢管形成的，所述钢组合物基于质量百分比：约0.03％至约0.2％C，约2.0％或更少的Si，不小于约1.0 至约1.5％的Mn，约0.1％或更少的P，约0.01％或更少的S，约1.0％或更少的Cr，约0.1％或更少的Al，约0.1％或更少的Nb，约0.1％ 或更少的Ti，约0.1％或更少的V和约0.01％或更少的N; 并且通过将处理后的钢管以至少约35％的累积压下率和约500℃至约900℃的最终轧制温度进行还原轧制。焊接钢管表现出优异的加氢成形性，即具有拉伸强度 至少约590MPa的强度和至少约0.22的nxr产物。 经处理的钢管优选以低于Ar 3相变点至少约20％的累积压缩率进行还原轧制。

    Welded steel pipe having excellent hydroformability and method for making the same
    7.
    发明授权
    Welded steel pipe having excellent hydroformability and method for making the same 有权
    具有优异的液压成形性的焊接钢管及其制造方法

    公开(公告)号：US06723453B2

    公开(公告)日：2004-04-20

    申请号：US10160798

    申请日：2002-05-31

    申请人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

    发明人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

    IPC分类号： B32B1518

    CPC分类号： C21D8/10 ,  C22C38/04 ,  Y10T428/12965

    摘要： A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition containing, on the basis of mass percent: about 0.05% to about 0.2% C; about 0.2% or less of Si; about 1.5% or less of Mn; about 0.1% or less of P; about 0.01% or less of S; about 0.1% or less of Al; and about 0.01% or less of N; and by reduction-rolling the treated steel pipe at a cumulative reduction rate of at least about 35% and a final rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of at least about 400 MPa and an n×r product of at least about 0.22. The treated steel pipe is preferably reduction-rolled at a cumulative reduction rate of at least about 20% below the Ar3 transformation point. The welded steel pipe is suitable for forming structural components.

    摘要翻译： 焊接钢管是通过加热或浸渍含有基于质量％：约0.05％至约0.2％C的钢组合物的未处理焊接钢管形成的; 约0.2％以下的Si; 约1.5％以下的Mn; 约0.1％以下的P; 约0.01％以下的S; 约0.1％以下的Al; 和约0.01％以下的N; 并且通过将处理后的钢管以至少约35％的累积压下率和约500℃至约900℃的最终轧制温度进行还原轧制。焊接钢管表现出优异的加氢成形性，即具有拉伸强度 至少约400MPa的强度和至少约0.22的nxr产物。 经处理的钢管优选以低于Ar 3相变点至少约20％的累积压缩率进行还原轧制。 焊接钢管适用于形成结构件。

    Steel pipe having high ductility and high strength and process for production thereof
    8.
    发明授权
    Steel pipe having high ductility and high strength and process for production thereof 有权
    具有高延展性和高强度的钢管及其生产方法

    公开(公告)号：US06331216B1

    公开(公告)日：2001-12-18

    申请号：US09214226

    申请日：1998-12-30

    申请人： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

    发明人： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

    IPC分类号： C21D713

    CPC分类号： C21D8/10 ,  C21D2201/00 ,  C21D2211/005

    摘要： The steel pipe has a structure composed mainly of ferrite or ferrite plus pearlite or ferrite plus cementite. The steel pipe is characterized by grain size not greater than 3 &mgr;m, preferably not greater than 1 &mgr;m, elongation greater than 20%, tensile strength (TS:MPa) and elongation (E1:%) whose product is greater than 10000, and percent ductile fracture greater than 95%, preferably 100%, measured by Charpy impact test on an actual pipe at −100° C. The structure is characterized by C: 0.005-0.03%, Si: 0.01-3.0%, Mn: 0.01-2.0%, and Al: 0.001-0.10% on a weight basis, and is composed of ferrite or ferrite and a secondary phase, with ferrite grains being not greater than 3 &mgr;m and the secondary phase having an areal ratio not more than 30%. A steel pipe stock having the above-mentioned composition is heated at a temperature of (Ac1+50° C.) to 400° C. and subsequently reduced at a rolling temperature of (Ac1+50° C.) to 400° C. such that the cumulative reduction of diameter is greater than 20%. The reducing is preferably performed such that at least one of rolling passes reduces the diameter by more than 6% per pass. The steel pipe will have high ductility and high strength and will be superior in toughness and stress corrosion cracking resistance, if the content of C, Si, Mn, and other alloying elements is limited low and reducing is performed at the temperature specified above. The resulting steel pipe has good fatigue resistance and is suitable for use as line pipe.

    摘要翻译： 钢管具有主要由铁素体或铁素体加珠光体或铁素体和渗碳体组成的结构。 钢管的特征在于，其粒径不大于3μm，优选不大于1μm，伸长率大于20％，拉伸强度（TS：MPa）和伸长率（E1：％）大于10000， 延性断裂大于95％，优选100％，通过夏比冲击试验在-100℃的实际管上测量。该结构的特征在于C：0.005-0.03％，Si：0.01-3.0％，Mn：0.01-2.0 ％，Al：0.001-0.10％，由铁素体或铁素体和二次相组成，铁素体晶粒不大于3μm，第二相的面积比不大于30％。 将具有上述组成的钢管坯料在（Ac1 + 50℃）的温度下加热至400℃，随后在（Ac1 + 50℃）的轧制温度下降低至400℃。 使得直径的累积减小大于20％。 优选地进行还原，使得至少一个轧制通道将直径每次通过减少6％以上。 如果C，Si，Mn和其他合金元素的含量低，并且在上述规定的温度下进行还原，则钢管将具有高延展性和高强度，并且在韧性和耐应力腐蚀开裂性方面优异。 所得钢管具有良好的抗疲劳性能，适用于管线管。

    Rolling mill
    9.
    发明授权
    Rolling mill 失效
    轧机

    公开(公告)号：US06216520B1

    公开(公告)日：2001-04-17

    申请号：US09376320

    申请日：1999-08-18

    申请人： Shigeharu Ochi ,  Hiroshi Fujiwara ,  Sho Inui ,  Takaaki Toyooka ,  Motoaki Itadani ,  Akira Yorifuji ,  Toshio Onishi ,  Koji Sugano ,  Mikio Kodaka ,  Nobuki Tanaka

    发明人： Shigeharu Ochi ,  Hiroshi Fujiwara ,  Sho Inui ,  Takaaki Toyooka ,  Motoaki Itadani ,  Akira Yorifuji ,  Toshio Onishi ,  Koji Sugano ,  Mikio Kodaka ,  Nobuki Tanaka

    IPC分类号： B21B3107

    CPC分类号： B21B13/103

    摘要： A rolling mill comprising a roll unit and a drive unit for driving the roll unit. The drive unit comprises an outer housing, a pair of large-diameter ring-like driving bevel gears disposed concentric with the pass line, an input shaft mechanism for rotating the driving bevel gears, and transmission mechanisms for transmitting the torque of the driving bevel bears to the rolls. Each transmission mechanism comprises a small-diameter transmission bevel gear caught between and engaging with the driving bevel gears and first and second transmission shafts for transmitting the torque of the transmission bevel gear to a roll. The drive and roll units are coupled and uncoupled by couplings. Four positioning parts are formed on the outer periphery of the inner housing of the roll unit. The outer housing of the drive unit is generally in the shape of a ring, and four positioning parts are formed on the inner periphery of the outer housing. When the inner housing is fitted into the outer housing, the inner housing is positioned in the outer housing by the positioning parts laterally and longitudinally and also in both directions of the pass line by stoppers and hold-downs.

    摘要翻译： 一种轧机，包括辊单元和用于驱动辊单元的驱动单元。 驱动单元包括外壳，与通行线同心设置的一对大直径环形驱动锥齿轮，用于使主动锥齿轮旋转的输入轴机构和用于传递驱动斜面轴的扭矩的传动机构 到卷 每个传动机构包括一个夹在两个主动锥齿轮之间并与之啮合的小直径传动伞齿轮，以及用于将传动锥齿轮转矩传递到一个辊的第一和第二传动轴。 驱动和滚动单元通过联接器联接和分离。 四个定位部分形成在辊单元的内壳体的外周上。 驱动单元的外壳通常为环形，并且在外壳的内周上形成有四个定位部。 当内壳体装配到外壳体中时，内壳体通过定位部件通过止动件和压紧件横向和纵向以及通过线的两个方向定位在外壳体中。