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Microstructure of 309 and 310 Austenitic Stainless Steel CMT Overlays on the 16Mo3 Pressure Vessel Steel

Rozmus-Górnikowska Magdalena, Dymek Stanisław, Blicharski M., Cieniek Łukasz, Kusiński Jan

Archives of Metallurgy and Materials

2021

Vol. 66, iss. 2

645--649

The aim of this work was to characterize the changes in microstructure and chemical composition of the austenitic overlays on a pressure vessel steel that occur in the vicinity of the interface between the overlay and the base material. The investigations were carried out on a 16Mo3 boiler pipes weld overlaid by 309 and 310 steels. The microstructural examinations were performed on longitudinal cross-sectioned samples. The qualitative and quantitative chemical composition analyses on metallographic samples were determined on Scanning Electron Microscopy (SEM) by means of Energy Dispersive Spectrometry (EDS). The article analyzes the influence of the solidification sequence in both types of steel on final microstructure.