2021 Nashville AISTech

Approach to Successful Production of Very-Low-Carbon High-Strength Galvanized Dual-Phase Steels Through a CSP Flex Mill (Room 208 B)

29 Jun 21
2:00 PM - 2:30 PM

Tracks: Metallurgy - Processing, Products & Applications: Physical Metallurgy of Steels II

Speaker(s): Denis Hennessy, Big River Steel; V.S.Y. Injeti, Plant Metallurgist, Big River Steel, a U. S. Steel Company; Chirag Mahimkar, Big River Steel - A U. S. Steel Co.; Shobhit Bhartiya, Big River Steel – A U. S. Steel Co.; Mat Bishop, Big River Steel; Matthew Enloe, CBMM North America Inc.; Amar De, Big River Steel – A U. S. Steel Co.

Very-low-carbon, microalloyed chemistry is utilized for the development of high-strength dual-phase (DP) steels with enhanced formability. Clean steel practices, in combination with suitable chemistry and casting powder selection, resulted in excellent mechanical properties and formability characteristics of DP steels along with excellent surface finish. The enhanced balance of strength and formability is attributed to the optimization of the microstructure through refinement, uniformity and balancing microconstituents mechanical response. In this contribution, production strategy and formability characterization of DP steels with tensile strengths of 780 MPa and above relevant to automotive body structure applications will be discussed.