Investigation into the cracking of inner cover of batch annealing furnace at bokaro steel plant |
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| Authors: | B Sarkar S K Shukla S Mukhopadhyay |
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| Affiliation: | (1) Research and Development Center for Iron and Steel (RDCIS), Steel Authority of India Limited (SAIL), Ranchi, India;(2) Research and Development Center for Iron and Steel (RDCIS), Bokaro Center, Steel Authority of India Limited (SAIL), Bokaro, India |
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| Abstract: | A detailed metallurgical investigation was undertaken to ascertain the cause of the premature cracking of inner covers used
in the batch annealing furnaces of Bokaro Steel Plant of the Steel Authority of India Limited (SAIL). It was found that the
cracking was a result of the profuse precipitation of chromium carbide. Precipitation of chromium carbide sensitizes the steel
to corrosion attack because of denudation of chromium from the matrix. Use of a properly stabilized austenitic stainless steel
was recommended for prolonged life of the inner covers. |
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| Keywords: | austenitic stainless steel batch annealing inner cover sensitization |
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