Abstract
The goal is to produce hot-rolled dual-phase steel of strength class DP 450–600 at OAO Novolipetskii Metallurgicheskii Kombinat (NLMK). The steel’s final structure and properties is greatly affected by single-stage strip cooling on the output roller conveyer of the 2000 continuous broad-strip mill. The influence of the hot-rolling parameters on the structure and mechanical properties of the hot-rolled SPRC440R steel from which cold-rolled dual-phase steel is produced at OAO NLMK is studied in the laboratory. The temperatures and rates for accelerated cooling on the output roller conveyer of the 2000 continuous broad-strip mill at OAO NLMK are calculated by means of a mathematical model. The laboratory data and simulation results are used in developing trial conditions for industrial rolling. Recommendations are made regarding the production of hot-rolled dual-phase steel corresponding to strength class DP 450–600.
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Original Russian Text © A.S. Tataru, V.K. Potemkin, R. Kawalla, A.S. Lukin, A.V. Dolgov, 2014, published in “Izvestiya VUZ. Chernaya Metallurgiya,” 2014, No. 7, pp. 26–33.
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Tataru, A.S., Potemkin, V.K., Kawalla, R. et al. Production of auto-body dual-phase steel with single-step cooling on the output conveyer of the 2000 continuous broad-strip mill at OAO NLMK. Steel Transl. 44, 491–497 (2014). https://doi.org/10.3103/S096709121407016X
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DOI: https://doi.org/10.3103/S096709121407016X