Berlin : Weierstraß-Institut für Angewandte Analysis und Stochastik
Doi
Abstract
In this article, the Mo-Mn dual phase steel and its process parameters
in hot rolling are discussed. The process window was derived by combining the
experimental work in a hot deformation dilatometer and numerical calculation
of process parameters using rate law models for ferrite and martensite
transformation. The ferrite formation model is based on the Leblond and
Devaux approach while martensite formation is based on the
Koistinen-Marburger (K-M) formula. The carbon enrichment during ferrite
formation is taken into account for the following martensite formation. After
the completion of the parameter identification for the rate law model, the
evolution of phases in multiphase steel can be addressed. Particularly, the
simulations allow for predicting the preferable degree of retained strain and
holding temperature on the run out table (ROT) for the required ferrite
fraction
