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Microstructure and creep behavior of a niobium alloyed cast heat-resistant 26 pct Cr steel |
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| Authors: | Eduardo A. A. G. Ribeiro R. Papaléo J. R. C. Guimarães |
| Affiliation: | 1. Acos Villares S.A., Av. Dr. Ramos de Azevedo 133, 09500, S?o Caetano do Sul, SP, Brazil 2. Metallurgy Department, Polytechnic School, University of S?o Paulo and Companhia Brasileira de Metalurgia e Minerac?o (CBMM), Av. Juscelino Kubitschek 1703, 04543, S?o Paulo, SP, Brazil 3. Companhia Brasileira de Metalurgia e Minera??o (CBMM), Avenida Juscelino Kubitschek 1703, 04543, S?o Paulo, SP, Brazil |
| Abstract: | The effects of niobium additions to a “straight chromium” alloy were investigated by optical metallography and creep testing at 1033 K. The results indicate that by increasing the amount of interdendritic constituent, niobium adds to creep strength and fracture ductility. Optimum alloy design requires balancing niobium, chromium, and carbon content. |
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