Speaker
Description
The development of steel “lean” chemical composition to be adopted for cylinders application is increasingly requested, aimed to reduce the critical alloying elements content while preserving adequate mechanical performance. In this framework the analysis of the heat treatment effect (temperatures and cooling rates) on microstructure evolution (hence mechanical properties) is a key issue. This work focuses on the assessment of the heat treatment response of a steel with 0.6%C-5.0% Cr nominal composition with 0.9% C in segregated region. The effect of austenitization is studied by building grain growth curves in a temperature range typical of industrial process. Continuous Cooling Transformation (CCT) diagrams are built starting from two different austenitization temperatures, thus simulating the effect of the cooling stage on both the cylinder regions characterized by nominal and segregated region. The effect of tempering is studied after quenching of both the nominal and segregated region. Results show that, even with a lean chemical composition, a wide range of microstructures and mechanical properties can be achieved through proper control of heat treatment parameters. This study provides useful guidelines for the design of steels with reduced alloying content, contributing to more environmentally sustainable steel production.
| Speaker Company/University | Andrea Di Schino - Dipartimento di Ingegneria, Università di Perugia, Via G. Duranti 93, 06125 Perugia, Italy |
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