|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||High Performance Steels
||A New Approach for Optimizing Heat Treatment Parameters in Q&P Steel
||Casey Gilliams, Kip Findley, John Speer
|On-Site Speaker (Planned)
Quenched and partitioned (Q&P) steels are designed to maintain strength and improve formability while utilizing leaner alloyed steels through the development of martensitic microstructures with retained austenite. Literature regarding Q&P steels primarily focus on maximizing retained austenite volume fractions rather than considering the influence of chemical and morphological characteristics of the retained austenite. In this work, consideration of retained austenite characteristics and the influence of prior processing on the heat treating response and resulting microstructures of Q&P steels are investigated in a 0.17C-2.8Mn-1.5Si steel through dilation simulations. A new methodology for optimizing Q&P heat treatment parameters utilizing fixed austenitizing conditions at a fixed partitioning temperature, involving careful monitoring of secondary martensite formation during final quenching, was introduced. Findings suggest that for a fixed composition, application of a general Q&P heat treatment results in similar microstructures and retained austenite volume fractions, independent of prior processing.
||Phase Transformations, Iron and Steel, Other