Abstract
Nanobainitic steel grades are a new construction material with a strength in the range of 1.9–2.2 GPa, at the same time characterised by good plasticity. Currently, the works on the development of nanobainitic steels at Łukasiewicz – IMŻ have entered the commercialisation phase. One of the main applications of ultra-strength nanobainitic steel plates is armour systems. In order to optimise the parameters of the production process of nanobainitic steel plates, microstructure examination and measurement of mechanical properties were carried out at intermediate stages of production and after final heat treatment. The results of industrial steel and plate production operations were assessed, including smelting and casting into ingot moulds, preparation of the rolling mill charge, hot rolling, plate production as well as intermediate and final heat treatment. Critical technological operations that may adversely affect the quality and performance of plates were identified. The directions for technology modification that reduce or eliminate threats of plate deterioration were formulated.
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