Speaker
Description
There is a continuing demand to develop steel with improved mechanical properties and to lower production cost. Microalloyed or high-strength low-alloy (HSLA) steels are widely used in a variety of applications due to a favorable combination of cost and mechanical properties. The proper design of steel alloys for a multitude of applications in which grain size refinement is necessary to promote mechanical performance requires a fundamental understanding of the influence of microalloy precipitate evolution during thermomechanical controlled processing. This contribution focuses on HSLA steels containing multiple microalloying elements (Nb, Ti, and V), as it was found that under certain processing conditions, mixed precipitates can be very fine, homogeneously distributed in the steel microstructure, and resistant to coarsening at elevated temperatures, which is beneficial for mechanical performance.