Nauka ta progres transportu (Jun 2013)
Influence of modification on descriptions of low-carbon steel of ST1KP and wheeled КP-Т
Abstract
Purpose. Establishment of influence of modification on chemical composition stabilizing, improvements of morphology and location of nonmetallics and increase of stability and level of mechanical properties of steels St1kp and KП-Т. Methodology. For the performance of the given goal the modern methods of researches are used: chemical and spectral; electron microscopy; metallography; determination of mechanical properties. Chemical composition of steels was determined on DSTU 2651-2006 and specifications U 35.2-23365425-600:2006. Findings. Influence of multifunction modifiers were set on chemical composition, forming of nonmetallics and mechanical properties in low-carbon steel of St1kp and wheeled KP-T. It is proved that multifunction modifiers diminish the amount of nonmetallics and improve their morphology, facilitate chemical composition stabilization and increase of mechanical properties level of probed steels. Originality. Possibility of chemical composition stabilization and mechanical properties, changes morphology of nonmetallics due to volume crystallization at modification were first proved. Practical value. Use of modifiers of different compositions at the enterprises of JSCo «ArselorMittal Krivoi Rog» and JSCo «INTERPAYP NTZ» at smelting of steels St1kp and KП-T allowed to promote mechanical descriptions, especially shock viscidity of the prepared wheels from steel KП-T at the average on 14 %. Two new modifiers of multifunction action for treatment low-carbon and wheeled steels were developed, the novelty of which was confirmed by the patents ofUkraine № 85254 and № 93684.
