AISTech 2022

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Development of Nanoprecipitation-Strengthened Cold-Rolled Batch Annealed HSLA Sheet Steels (>490MPa Yield Strength) With Superior Formability (Room 310)

A low-carbon Ti-microalloyed chemistry was selected for the development of family of cold-rolled and batch-annealed high-strength high-formable steels. A clean steel practice combined with a suitable choice of hot rolling and batch annealing practice were optimized to retain precipitate strengthening in the final fully processed steel and microstructural attributes that resulted in superior forming characteristics. In this paper, production strategy and advanced material characterization of high-strength, low-alloy steels with minimum yield strength of 490 MPa will be discussed. Additionally, alternative chemistry approach with grain refinement by Niobium will be discussed and results will be presented.