Modeling of Intercritical Heat Treatment of DP and TRIP Steels |
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Authors: | REGER Mihaly VERO Balazs CSEPELI Zsolt Pan Jiansheng |
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Affiliation: | 1. Budapest Polytechnic, Budapest, Hungary 2. Bay Zoltan Foundation, Institute for Materials and technology, Budapest, Hungary 3. Dunaferr Co., Innovation Management, Dunaujvaros, Hungary 4. Shanghai Jiao Tong University, Shanghai, China |
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Abstract: | The final microstructure of DP and TRIP assisted steels can evolve after hot working (hot rolling) or during post heat treatment process. In the formation of the final structure a number of different technological parameters have important roles, e.g. end temperature of rolling, cooling rates, temperature of intercritical annealing, etc. As a result of the individual factors and their combinations a lot of product technology routes are feasible. The effect of the different combinations of these technological parameters on the microstructure can be mapped by the special Jominy end-quench test (so called intercritical Jominy end-quench test) described in this paper. Unlike the traditional Jominy test, in this case there is a partial anstenizing between A1 and A3 temperatures which results in a given amount of ferrite in the microstructure before quenching. The method developed can be applied for mapping DP and TRIP assisted steels' microstructure in a wide range of technological parameters. The analysis of measured and calculated data can help us find the technological parameters optimal from the microstructural point of view. |
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Keywords: | dual-phase steel TRIP steel Jominy End Quench Method modeling |
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