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    Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state
    4.
    发明授权
    Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state 有权

    公开(公告)号：US09718116B2

    公开(公告)日：2017-08-01

    申请号：US12670230

    申请日：2008-06-26

    申请人： Markus Ring ,  Gerd Kloster ,  Oliver Sommerkamp ,  Caroline Rott ,  Marion Erdelen-Peppler

    发明人： Markus Ring ,  Gerd Kloster ,  Oliver Sommerkamp ,  Caroline Rott ,  Marion Erdelen-Peppler

    IPC分类号： B21J5/08 ,  B21K21/12

    CPC分类号： B21J5/08 ,  B21K21/12

    摘要： The invention relates to a method for the production of hot-finished, particularly hot-rolled, seamless pipes having optimized fatigue properties in the welded state, having an outside diameter of up to 711 mm and a nominal wall thickness of up to 100 mm, made of metal, in particular steel. After hot or finish rolling, a defined pipe cross-section is produced on at least one pipe end across a predetermined length, having tight tolerances for inside and outside diameters, wherein the cross-section can then be welded to the pipe end of another pipe. According to the invention, in a region a wall thickness is created in a first step at the pipe end in question, the thickness being bigger than on the remaining pipe body, wherein the outside diameter is increased and/or the inside diameter is reduced. In a second step, the required pipe cross-section is produced in said region by mechanical treatment, and the transition from the treated to the untreated region of the pipe is produced with low surface roughness and almost notch-free, and the residual wall thickness remaining in the treatment region is within the required tolerances.

    METHOD FOR THE PRODUCTION OF HOT-FINISHED SEAMLESS PIPES HAVING OPTIMIZED FATIGUE PROPERTIES IN THE WELDED STATE
    5.
    发明申请
    METHOD FOR THE PRODUCTION OF HOT-FINISHED SEAMLESS PIPES HAVING OPTIMIZED FATIGUE PROPERTIES IN THE WELDED STATE 有权
    在焊接状态下生产具有优化疲劳性能的热成型无缝管的方法

    公开(公告)号：US20100326557A1

    公开(公告)日：2010-12-30

    申请号：US12670230

    申请日：2008-06-26

    申请人： Markus Ring ,  Gerd Kloster ,  Oliver Sommerkamp ,  Caroline Rott ,  Marion Erdelen-Peppler

    发明人： Markus Ring ,  Gerd Kloster ,  Oliver Sommerkamp ,  Caroline Rott ,  Marion Erdelen-Peppler

    IPC分类号： F16L9/02 ,  B21D41/02

    CPC分类号： B21J5/08 ,  B21K21/12

    摘要： The invention relates to a method for the production of hot-finished, particularly hot-rolled, seamless pipes having optimized fatigue properties in the welded state, having an outside diameter of up to 711 mm and a nominal wall thickness of up to 100 mm, made of metal, in particular steel. After hot or finish rolling, a defined pipe cross-section is produced on at least one pipe end across a predetermined length, having tight tolerances for inside and outside diameters, wherein the cross-section can then be welded to the pipe end of another pipe. According to the invention, in a region a wall thickness is created in a first step at the pipe end in question, the thickness being bigger than on the remaining pipe body, wherein the outside diameter is increased and/or the inside diameter is reduced. In a second step, the required pipe cross-section is produced in said region by mechanical treatment, and the transition from the treated to the untreated region of the pipe is produced with low surface roughness and almost notch-free, and the residual wall thickness remaining in the treatment region is within the required tolerances.

    摘要翻译： 本发明涉及一种用于制造在焊接状态下具有优化的疲劳性能的热成型，特别是热轧无缝管的方法，其具有高达711mm的外径和高达100mm的标称壁厚， 由金属制成，特别是钢。 在热轧或精轧之后，在至少一个预定长度的管端上产生限定的管横截面，其具有用于内部和外部直径的严格公差，其中该横截面可以被焊接到另一个管道的管端 。 根据本发明，在所述管端部的第一工序中产生壁厚，其厚度大于剩余管体上的厚度，其中外径增大和/或内径减小。 在第二步骤中，通过机械处理在所述区域中产生所需的管横截面，并且生产具有低表面粗糙度和几乎无切口的从管的经处理区域到未处理区域的过渡，并且剩余壁厚 残留在治疗区域在所要求的公差之内。