OPERATIONAL CHARACTERISTICS TUBE BENDS OF X10CRWMOVNB9-2 STEEL MADE IN THE BENDING PROCESS WITH LOCAL INDUCTION HEATING

1 CIEŚLA Marek
Co-authors:
1 JUNAK Grzegorz 2 TOMCZAK Janusz 3 KAWAŁA Tomasz
Institutions:
1 Silesian University of Technology, Faculty of Materials Science and Metallurgy, Krasińskiego 8, 0-019 Katowice, Poland, marek.ciesla@polsl.pl
2 Lublin University of Technology, Faculty of Mechanical Engineering, Nadbystrzycka 36, 0-618 Lublin, Poland
3 ZRE Katowice S.A. Production Centre, Martyniaków 243-603 Jaworzno, Poland
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
426-431
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
50 views / 11 downloads
Abstract

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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