Grain Size Dependence of Austenite Decomposition in Air-Cooled 16MnCr5 Steel

Abstract

A hot-rolled and controlled rolled 16MnCr5Â steel was analyzed after similar industrial cooling conditions. The hot rolled steel had a ferriteâ[euro]"bainite microstructure whereas the controlled rolled steel had a ferriteâ[euro]"pearlite microstructure. The prior austenite grain size was found to be the controlling factor based on a cooling analysis. The effect of prior austenite grain size on the bainite start temperature had to be considered in the transformation model.[PUBLICATION ABSTRACT]