Technology of welding joints mixed with duplex steel

Abstract

Results of the examinations of sample plates of mixed joints with the duplex steel were discussed. Examinations were taken on the sample plates of mixed joints of sheet plates type P355NL1 and X2CrNiMoN2253 welded by the flux-cored wire DW329A by the Kobelco company of the following category T 22 9 3 NL RC/M3 in the gas shroud M21 (Ar+18%CO2) (plate no. 1) and nickel-covered electrodes E Ni 6082 by the Böhler company (plate no. 2). Results of the side bend test of the welded joint, transverse tensile test, stretching of the weld metal, impact strength, micro- and macroscopic metallographic examinations, and measurements of the delta ferrite content were presented.