Compositional evolution of microalloy carbonitrides in a Mo-bearing microalloyed steel

摘要

Molybdenum is known to affect microalloy precipitate evolution during processing in ferrite and auskinite. but a unified explanation of the role of Mo in precipitate evolution is still lacking. Experiments and thermodynamic calculations indicate that Mo is incorporated into (Nb,Mo)(C,N) precipitates both in the hot-rolled condition and after reheating to 900 °C . Molybdenum enrichment is reduced after reheating and soaking at 1100 °C. No measurable segregation of Mo to the carbonilride matrix. interlace was observed in any condition.