Creep properties of 1.25Cr-1Mo-0.25V steels for turbine casings
AUTOR(ES)
Hernández, Sergio G., Conejo, Alberto N.
FONTE
Rem: Revista Escola de Minas
DATA DE PUBLICAÇÃO
2005-06
RESUMO
A heat resistant steel, 1.25Cr-1Mo-0.25V, produced by a casting process and used in the manufacture of turbine casings, has been heat treated with a combination of thermal cycles that involve annealing, quenching and tempering in order to obtain high mechanical properties - in particular, rupture-strength at high temperatures. The Larson-Miller Parameter has been used to predict results from short-time tests (50 hours) with those obtained at longer times (3000-20000 hours). The predictions resulted in higher rupture-times. However, the current methodology can provide a rapid estimation of creep-behavior at longer times from short-time tests in order to take corrective actions during the manufacturing process.
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