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Quantitative Microanalysis of Fine Precipitates in Microalloyed Steels

Published online by Cambridge University Press:  25 February 2011

Joseph R. Michael
Joseph R. Michael*
Affiliation:
Bethlehem Steel Corporation, Research Department, Bethlehem, PA
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Abstract

Matrix and grain boundary precipitation in austenite has been studied in two Nb/V microalloyed steels with different V levels, which were given a number of different heat treatments after hot deformation. The steel with a higher V level was found to have a greater number of fine carbonitride precipitates in the matrix. In both steels, the precipitates became more Nb-rich as the aging temperature was increased from 854°C to 1066°C. For a given steel and heat treatment, the matrix precipitates were generally more Nb-rich than the grain boundary precipitates.

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