THE INFLUENCE OF A SULPHIDIZING ATMOSPHERE ON THE CREEP RESISTANCE OF THE STEEL G-X40NICRNB3525
The present work deals with an investigation on the creep behaviour of the 35Ni25Cr centrifugally cast high temperature steel HP40Nb (G-X40NiCrNb3525). The material has been tested in two different gaseous environments of oxidizing, sulphidizing and carburizing potentials. The experimental conditions were closely related to the working conditions encountered in fluidized bed combustion of coal. The results have shown that in both atmospheres internal oxidation, sulphidation and carburization occur. The formation of related corrosion products leads to a significant reduction of creep resistance at a sulphur partial pressure of pS-2 + z < 6 x 10**-8 bar whereas no alteration of creep properties has been found at pS-2 + z < 6 x 10**-9 bar up to 5000 h test duration.
Bibliographic Reference: 7. VORTRAGSVERANSTALTUNG DER FORSCHUNGSVEREINIGUNG WARMFESTE STAEHLE, DUESSELDORF (GERMANY), NOV. 30, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER D 31877 ORA
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Record Number: 1989123030700 / Last updated on: 1987-01-01
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