Study on High-Temperature Creep Behavior of T23 and T24 Steels

摘要

A progressive increase of plant efficiency calls for new requirements of heat-resistant steels used in the boiler and piping systems. In this paper, high-temperature creep behavior of T23 and T24 steels were studied. Creep tests over a long period of time have been conducted for both steels at different temperatures. The creep mechanisms of the two steels have been clarified by analyzing the minimum creep rate versus stress data. Besides, the creep rupture data from the creep tests were in good accordance with theoretical simulation on the basis of the CDM model over a long time. Creep temperature has great effects on the rupture strength of the two steels. By creep rupture experiments and appropriate modelling, the high-temperature creep behavior can be well described.