In HSLA steels (high strength low alloys), the most important strengthening
mechanisms are grain refinement and precipitation hardening by second phases.
Therefore, the control of precipitation and chemical composition of the second phases
is essential. A model based on thermodynamics alone does not predict the precipitation
phenomena that are observed in thin slabs. This paper introduces a kinetic model that
makes it possible to take into account the influence of the thin slab casting process
on the precipitation and composition of carbonitrides.