Abstract
This study investigates the influence of various microalloying systems (Nb–V–Ti, V–Nb–Ti, V‒N, V–Ti–N, V–Ti) of low-carbon pipe steels on the formation of the microstructure, fine structure, and deposition of dispersive particles in rolled items produced under conditions of endless strip production (ESP) at Vyksa Steel Works in accordance with a combined procedure of melting, casting into thin slab (with the thickness of 90 mm), direct rolling with subsequent accelerated cooling, and coiling into a roll. It has been demonstrated that addition of titanium into steel leads to the formation of particles in austenite region. These particles are coarser in steels with titanium and niobium. In steels with higher nitrogen content fine interphase particles are formed, which are not observed in systems with Nb, V, and Ti. In steels of the Nb–V–Ti, and V‒Nb–Ti microalloying systems no particles with vanadium are observed.
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