Heat-affected zone and weld metal behavior of modern 9--10% Cr steels
Book
·
OSTI ID:442993
- Graz Univ. of Technology (Austria)
- VOEST Alpine Stahl Linz (Austria)
Basic investigations of the weldability of modern 9--10% Cr creep resistant steels for application in high efficiency and low emission thermal power generation plants were performed on a pipe P91 and a W-containing cast steel G-X 12 CrMoWVNbN 10 1 1. Gleeble simulation, representing the manual metal arc welding process, were applied to produce HAZ-simulated microstructures. They were exposed to different PWHT-treatments and tested using hardness tests, metallographic investigations, constant strain rate tests, creep tests and toughness tests. Primary attention was given to the softening effect in the HAZ and its influence on the creep resistance of the welded material. The decrease shown by the W-modified version seems to be less pronounced than that observed in the P91 material. The preheating temperature during welding can be selected through determination of the M{sub s}-transformation behavior of the base materials and the welding deposit.
- OSTI ID:
- 442993
- Report Number(s):
- CONF-950682--; ISBN 0-87170-567-2
- Country of Publication:
- United States
- Language:
- English
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