from the conferences organized by TANGER Ltd. provisional website
The paper contains results of theoretical and experimental research on the bending process of tube with dimensions of 530 mm x 90 mm, used in production of power pipelines of X10CrWMoVNb9-2 steel grade. The innovative process of pipe bending with the use of local induction heating and results of its numerical simulation (FEM) were presented. Modelling of tube bending was done using Simufact Forming 12.0 software. A change of the geometry in the cross-section of the bend area was subjected to analysis, including the ovalization of the cross-section and the wall thickness in the region subject to tensile and compression. The geometrical features of the bend determined on the basis of numerical calculations were compared with the measurement results obtained in industrial conditions. Basic mechanical properties of the tube in the as-delivered condition and of the fabricated tube bend were determined using tensile, hardness, impact, low-cycle fatigue and creep tests. It was proved that the tube bends made of the X10CrWMoVNb9-2 steel, subject to bending using the proposed technology, meets the requirements of the applicable standards.Keywords: Tube bending, numerical modelling, mechanical properties, creep, low-cycle fatigue
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