Localized swelling of Fe-Cr-Ni alloy rollers in high-temperature applications |
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Authors: | A. Prasad S. K. Sen S. Varadrajan S. Jha |
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Affiliation: | (1) Research and Development Centre for Iron and Steel, Steel Authority of India Limited, 834002 Ranchi, India |
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Abstract: | Localized swelling has been observed in 24Cr-24Ni-Nb steel transportation rollers used in the normalizing furnace of a plate mill after prolonged service at high temperature. Due to high localized thermal and mechanical stresses, the chromia layer formed on the roller surface ruptures, exposing the roller substrate to furnace oxygen. Oxidation of second-phase carbides results in the formation of carbon monoxide at very high partial pressure. This leads to formation of voids, leading in turn to localized swelling of the roller material. |
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Keywords: | Fe-Cr-Ni Alloy localized swelling oxidation void formation |
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