Weld HAZ embrittlement of Nb containing C–Mn steels
The adverse influence of Nb on weld HAZ properties is still an active issue of discussion between construction companies and steel manufacturers. Some controversy exists in the literature concerning the influence of Nb on HAZ properties under certain conditions, and this investigation was subsequent...
Gespeichert in:
Veröffentlicht in: | The International journal of pressure vessels and piping 1998-08, Vol.75 (9), p.661-677 |
---|---|
Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The adverse influence of Nb on weld HAZ properties is still an active issue of discussion between construction companies and steel manufacturers. Some controversy exists in the literature concerning the influence of Nb on HAZ properties under certain conditions, and this investigation was subsequently performed over a range of C and Nb compositions, typical of the steels concerned, and for three different single cycle heat inputs ranging from 1.5 to 6
kJ/mm. Simulated thermal cycles were employed, using a Gleeble 1500 thermomechanical simulator, followed by CVN testing. It is shown that Nb additions can have a detrimental or beneficial effect at low heat inputs, depending on the C level, but a severe detrimental effect of Nb on HAZ toughness is observed at high heat inputs and C levels. |
---|---|
ISSN: | 0308-0161 1879-3541 |
DOI: | 10.1016/S0308-0161(98)00066-0 |