On effect of rhenium on mechanical properties of a high-Cr creepresistant steel

Abstract

Addition of 0.2% rhenium in the experimental steel improved the short-term creep strength at 650 C. Comparison of kinetics of tungsten depletion from the matrix in different high-Cr martensitic steels showed that rhenium in the experimental 10Cr-3Co-3W-0.2Re steel did not lead to retaining an increased amount of solute W in the ferritic matrix during both aging and creep at 650 C. At the same time, the precipitation of the high fraction of the fine Laves phase particles provided the effective particle strengthening