High-Temperature Oxidation Behavior and Mechanism of a New Type of Wrought Ni–Fe–Cr–Al Superalloy up to 1300°C

摘要: The oxidation behavior of a new type wrought Ni–Fe–Cr–Alsuperalloy has been investigated systematically in the temperature range of1100 to 1300°C. Results are compared with those alloy 214, Inconel600, and GH 3030. It is shown that resistance newsuperalloy excellent much better than comparisonalloys. Scanning electron microscopy (SEM), probe microanalysis(EPMA), X-ray diffraction (XRD) experiments reveal excellentoxidation superalloy due formation adense, stable continuous Al2O3 Cr2O3 oxide layer at hightemperatures. Differential thermal analysis (DTA) shows formationof layers on reaches maximum at1060 1356°C, respectively. peels off easily, thesingle dense remains, giving good attemperatures higher 1150°C. In addition, superalloypossesses high mechanical strength temperatures. On-site testsshowed ideal can beused temperatures up 1300°C various oxidizing andcorrosion atmospheres, such as containing SO2, CO2 etc., for longperiods.