ATOM PROBE MICROANALYSIS OF WELD METAL IN A SUBMERGED ARC WELDED CHROMIUM-MOLYBDENUM STEEL

B. Josefsson , A. Kvist , H. Andrén

A submerged arc welded 2.25Cr - 1Mo steel has been investigated using electron microscopy and atom probe field ion microscopy. The bainitic microstructure of the as-welded steel consisted of ferrite and martensite. During heat treatment at 690°C the martensite transformed to ferrite and cementite and needle-shaped (Cr,Mo)2C carbides precipitated. Together with a substantial decrease in dislocation density, this resulted in an improvement of the toughness.

Domaines: Articles anciens

B. Josefsson, A. Kvist, H. Andrén. ATOM PROBE MICROANALYSIS OF WELD METAL IN A SUBMERGED ARC WELDED CHROMIUM-MOLYBDENUM STEEL. Journal de Physique Colloques, 1987, 48 (C6), pp.C6-435-C6-440. ⟨10.1051/jphyscol:1987671⟩. ⟨jpa-00226879⟩