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    Welded steel pipe having excellent hydroformability and method for making the same
    12.
    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：US06682829B2

    公开(公告)日：2004-01-27

    申请号：US10160820

    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： C22C38/02 ,  C21D8/10 ,  C22C38/06 ,  C22C38/28 ,  C22C38/38 ,  Y10T428/12965

    摘要： A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition comprising, on the basis of mass percent: about 0.05% to about 0.3% C; about 2.0% or less of Si; more than about 1.5% to about 5.0% Mn; about 0.1% or less of P; about 0.01% or less of S; about 0.1% or less of Cr; about 0.1% or less of Al; about 0.1% or less of Nb; about 0.3% or less of Ti; and about 0.01% or less of N; and by diameter-reduction-rolling the treated steel pipe at a accumulated diameter reduction rate of at least about 35% and a finish rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of about 780 MPa or more and a n×r product of at least about 0.15. The treated steel pipe is preferably diameter-reduction-rolled at a accumulated diameter 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，所述焊接钢管基于质量百分比：约0.05％至约0.3％C; 约2.0％以下的Si; 大于约1.5％至约5.0％的Mn; 约0.1％以下的P; 约0.01％以下的S; 约0.1％以下的Cr; 约0.1％以下的Al; 约0.1％以下的Nb; 约0.3％以下的Ti; 和约0.01％以下的N; 并且以约至少约35％的累积直径减小率和约500℃至约900℃的精轧温度对经处理的钢管进行直径缩小轧制。焊接钢管显示出优异的加氢性能， 具有约780MPa或更高的拉伸强度和至少约0.15的nxr产品。 经处理的钢管优选以低于Ar 3相变点至少约20％的累积直径减小率进行直径减小轧制。

    Roller width adjusting device for a divided type molding roller
    15.
    发明授权
    Roller width adjusting device for a divided type molding roller 失效
    用于分割型成型辊的辊宽调节装置

    公开(公告)号：US5599264A

    公开(公告)日：1997-02-04

    申请号：US415470

    申请日：1995-04-03

    申请人： Yuji Hashimoto ,  Takaaki Toyooka ,  Susumu Itatani ,  Tsutomu Ide

    发明人： Yuji Hashimoto ,  Takaaki Toyooka ,  Susumu Itatani ,  Tsutomu Ide

    IPC分类号： B21B27/02 ,  B21C37/08 ,  B21C37/083 ,  B21D5/12

    CPC分类号： B21C37/08 ,  B21C37/083 ,  B21D5/12 ,  B21B27/028

    摘要： A roller width adjusting device for a divided molding roller has a hollow main shaft journalled at each end to side bearings so as to be rotatable around a rotary axis thereof. The hollow main shaft is connected at one end to a driving source for rotating the main shaft around the rotary axis. A pair of hollow cylindrical roller holders are disposed on an outer periphery of intermediate portions of the main shaft so as to be slidable along the rotary axis of the main shaft. The roller holders may be fixed in any position along the rotary axis by a holding device. A pair of divided type molding rollers are attached to the roller holders, respectively. An adjusting shaft is rotatably disposed in the hollow shaft along its rotary axis. Each end of the adjusting shaft has a screw thread with opposed screw directions. One end of the adjusting shaft has a rotatable handle. By rotating the handle in one direction the interval between divided rollers is increased thus moving the roller holders farther apart; whereas by rotating the handle in the other direction the interval is decreased thus drawing the roller holders closer together. Once in position, the divided rollers are slidably fixed by the holding device such that pipe of that particular size can be manufactured.

    摘要翻译： 用于分割成形辊的辊宽度调节装置具有中空主轴，其在每个端部与侧面轴承支承，以便能够围绕其旋转轴线旋转。 中空主轴在一端连接到用于使主轴绕旋转轴线旋转的驱动源。 一对中空的圆柱滚子保持器设置在主轴的中间部分的外周上，以便能够沿着主轴的旋转轴线滑动。 辊保持器可以通过保持装置沿着旋转轴线固定在任何位置。 一对分割型成型辊分别安装在滚子支架上。 调节轴沿其旋转轴线可旋转地设置在中空轴中。 调节轴的每一端都有一个螺纹相对的螺纹方向。 调节轴的一端具有可旋转的手柄。 通过在一个方向上旋转手柄，分离的辊之间的间隔增加，从而使辊保持器更远离; 而通过沿另一方向旋转手柄，间隔减小，从而将辊保持器更靠近在一起。 一旦就位，分离的辊由保持装置可滑动地固定，使得可以制造具有特定尺寸的管。

    Method for forming an electric resistance welded steel pipe
    16.
    发明授权
    Method for forming an electric resistance welded steel pipe 失效
    电阻焊钢管形成方法

    公开(公告)号：US4590781A

    公开(公告)日：1986-05-27

    申请号：US630000

    申请日：1984-07-12

    申请人： Takaaki Toyooka

    发明人： Takaaki Toyooka

    IPC分类号： C02F3/06 ,  B21C37/08 ,  B21D5/12 ,  C02F3/00

    CPC分类号： B21C37/0822 ,  B21C37/0815 ,  B21D5/12

    摘要： An improved method of forming a skelp into a rounded tubular form in the preparation of an electric resistance welded steel pipe. Different from conventional methods, the skelp is bent in the initial and intermediate forming stages within a limited region alone along the centerline thereof to have a U-shaped flower pattern. Thereafter, the edge portions of the bent skelp are bent in the upstream fin pass rolls to have a curvature of at least 80% of the final curvature with simultaneous overbending in the boundary regions on both sides of the side portions of the rounded skelp. Finally, the rounded skelp is pressed down in the direction to decrease the vertical diameter to bulge out in the transverse direction with simultaneous unbending the overbent portions into the final curvature.

    摘要翻译： 一种在电阻焊钢管的制备中形成圆形管状形状的改进方法。 与常规方法不同，在初始和中间成形阶段中，边缘沿着其中心线仅在有限的区域内弯曲成具有U形花纹。 此后，弯曲骨架的边缘部分在上游翅片通过辊中弯曲，具有至少80％的最终曲率的曲率，同时在圆形边缘的侧部两侧的边界区域中同时进行过弯曲。 最后，将圆形的边缘沿垂直方向压下以减小垂直直径，从而在横向方向上凸出，同时使上覆部分弯曲成最终曲率。

    STAINLESS-STEEL PIPE FOR OIL WELL AND PROCESS FOR PRODUCING THE SAME
    17.
    发明申请
    STAINLESS-STEEL PIPE FOR OIL WELL AND PROCESS FOR PRODUCING THE SAME 有权
    用于油井的不锈钢管及其生产方法

    公开(公告)号：US20090272469A1

    公开(公告)日：2009-11-05

    申请号：US12416996

    申请日：2009-04-02

    申请人： Mitsuo Kimura ,  Takanori Tamari ,  Takaaki Toyooka

    发明人： Mitsuo Kimura ,  Takanori Tamari ,  Takaaki Toyooka

    IPC分类号： C21D9/08 ,  C22C38/44

    CPC分类号： C21D6/004 ,  B21C37/08 ,  C21D9/14 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

    摘要： A steel composition contains: 0.05% or less of C; 0.5% or less of Si; 0.20% to 1.80% of Mn; 0.03% or less of P; 0.005% or less of S; 14.0% to 18.0% of Cr; 5.0% to 8.0% of Ni; 1.5% to 3.5% of Mo; 0.5% to 3.5% of Cu; 0.05% or less of Al; 0.20% or less of V; 0.01% to 0.15% of N; and 0.006% or less of O on a mass basis, and satisfies the following expressions: Cr+0.65Ni+0.6Mo+0.55Cu−20C≧18.5 and Cr+Mo+0.3Si−43.5C−0.4Mn−Ni−0.3Cu−9N≦11 (where Cr, Ni, Mo, Cu, C, Si, Mn, and N represent their respective contents (mass %)). After such a steel pipe material is formed into a steel pipe, the steel pipe is quenched by cooling after heating to a temperature of the AC3 transformation point or more and tempered at a temperature of the AC1 transformation point or less. The composition may further contain at least one element of Nb and Ti; at least one element selected from the group consisting of Zr, B, and W; or Ca, singly or in combination. Preferably, the steel pipe has a martensitic structure containing 5 to 25 percent by volume of a residual austenite phase, or further containing 5% percent by volume or less of a ferrite phase. Thus, the resulting stainless steel pipe for oil country tubular goods exhibits a superior corrosion resistance even in extremely severe, corrosive environments containing carbon dioxide gas (CO2), chloride ions (Cl−), or the like.

    摘要翻译： 钢组合物含有：0.05％以下的C; 0.5％以下的Si; 0.20％〜1.80％的Mn; 0.03％以下的P; 0.005％以下的S; 14.0％〜18.0％的Cr; 5.0％〜8.0％的Ni; 1.5％〜3.5％的Mo; 0.5〜3.5％的Cu; 0.05％以下的Al; 0.20％以下V; 0.01％〜0.15％N; 和0.006％以下，满足以下表达式：Cr + 0.65Ni + 0.6Mo + 0.55Cu-20C> = 18.5和Cr + Mo + 0.3Si-43.5C-0.4Mn-Ni-0.3 Cu-9N <= 11（其中Cr，Ni，Mo，Cu，C，Si，Mn和N分别表示各自的含量（质量％））。 在将这种钢管材料形成为钢管之后，将钢管在加热至AC3相变点以上的温度后通过冷却淬火，并在AC1相变点或更低温度下回火。 该组合物还可以含有Nb和Ti中的至少一种元素; 选自Zr，B和W中的至少一种元素; 或Ca，单独或组合使用。 优选地，钢管具有含有残留奥氏体相5〜25体积％的铁素体相的5体积％以下的马氏体组织。 因此，即使在包含二氧化碳（CO2），氯离子（Cl-）等的极严重的腐蚀性环境中，所得到的用于油罐管的不锈钢管也表现出优异的耐腐蚀性。