Acta Stereologica

0351-580X

 

depuis le 05 décembre 2013 :
Visualisation(s): 696 (0 ULiège)
Téléchargement(s): 40 (0 ULiège)
print        
Goran Radenković, Zorica Cvijović & Draginja Mihajlović

Effect of quenching temperature on microstructure and properties of cast duplex stainless steel

Article
Open Access

Document(s) associé(s)

Version PDF originale

Annexes

Abstract

This paper considers the influence of microstructural changes obtained by suitable heat treatment on impact toughness and pitting corrosion resistance of cast duplex stainless steel 0.08C-22.5Cr-8Ni-2Mo-3.5Cu. Investigated steel was annealed in the temperature range from 1000 to 1300 °C for lh and water quenched. Microstructure of specimens obtained from broken Charpy bars was characterized quantitatively using a semi-automatic image analyser. The stereological parameters: Vv, SV and Sv/VV were estimated by a linear method. The localized corrosion behavior was studied in 0.5M NaCl using the potentiodynamic anodig polarisation method. The changes in microstructure are pronounced from I100 C. In comparison with the cast structure ferrite/austenite ratio gradually increases while the surface density and specific (surface decrease. The impact toughness, however, reaches a maximum at H00 C and then decreases. The corrosion resistance of all heat treated alloys is improved. The lowest current density and best resistancce to pit initiation are achieved by annealing in the range from 1100 to 1210 °C. The results indicate that the ferrite/austenite ratio itself is a very important but not a single factor determining the mechanical and corrosion properties of cast duplex steel.

Pour citer cet article

Goran Radenković, Zorica Cvijović & Draginja Mihajlović, «Effect of quenching temperature on microstructure and properties of cast duplex stainless steel», Acta Stereologica [En ligne], Volume 13 (1994), Number 2 - Proceedings of the sixth European congress for stereology - Part three - June 1994, cast duplex stainless steel, corrosion resistance, impact toughness, microstructural changes, stereology439-444 URL : https://popups.ulg.ac.be/0351-580x/index.php?id=1304.

A propos de : Goran Radenković

Mechanical Engineering Faculty, University of Nish, IBOIJU Nish, Beogradska I4, Yugoslavia

A propos de : Zorica Cvijović

Faculty of Technology and Metallurgy, University of Belgrade, 11001 Belgrade, Karnegijeva 4, POB.494, Yugoslavia

A propos de : Draginja Mihajlović

Faculty of Technology and Metallurgy, University of Belgrade, 11001 Belgrade, Karnegijeva 4, POB.494, Yugoslavia