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This report consists of two complementary parts. The first part deals with the technology and welding parameters while the second part deals with the metallurgical aspects of the flash butt welding of hot rolled strips. The first part has been carried out with a pilot 100 kVA fully instrumented machine. The main welding parameters and the way they act on each other have been assessed. The second part has been carried out with an industrial strip joining flash butt welding machine. The hot strips examined have different levels of various elements (carbon, manganese, silicon, nitrogen). The effects of the main welding conditions and of steel composition on the joints' ductility have been assessed. It appears that the welded joints' ductility depends mainly on their soundness. Their soundness may be reduced by oxide penetrators within the joints. A model is put forward to account for the observed phenomenon which is based on internal oxidation of steel close to the flashing end of the strip. The proposed mechanism is strongly dependent on flashing rate, in agreement with the experimental results.

Additional information

Authors: DEVILLERS L, European Commission, Bruxelles (BE)
Bibliographic Reference: EUR 15148 FR (1994) 99 pp., FS, ECU 11.50
Availability: (2)
ISBN: ISBN 92-826-9199-3
Record Number: 199411615 / Last updated on: 1995-01-10
Original language: fr
Available languages: fr