High-efficiency fast-heating annealing of a cold-rolled dual-phase steel |
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| Affiliation: | 1. Department of Materials Science and Engineering, Ghent University, Technologiepark 903, 9052 Gent, Belgium;2. Department of Metallurgical Engineering, Universidad de Santiago de Chile, Av. Lib. Bdo. O''Higgins 3363, Estación Central, Santiago de Chile, Chile;3. IMDEA Materials Institute, Calle Eric Kandel 2, Getafe, 28906 Madrid, Spain;4. Delft University of Technology, Department of Materials Science and Engineering, Mekelweg 2, 2628CD Delft, The Netherlands;5. Materials innovation institute (M2i), Electronicaweg 25, 2628 XD Delft, The Netherlands |
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| Abstract: | In the present work, fast-heating annealing was performed on a cold-rolled Fe–0.07C–1.7Mn–0.429Si dual-phase steel. In contrast to commercial conventional continuous annealed steel, 6.6% higher ultimate tensile strength and 14.1% greater elongation were obtained. Transmission electron microscopy observations reveal the incomplete ferrite recrystallization, the formation of bainite and fine fiber-like martensite in fast-heating processed dual-phase steel. High-efficiency simplified fast-heating annealing process demonstrates great potential for large-scale production. |
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| Keywords: | Fast-heating annealing Dual-phase steel Austenite formation |
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