Optimalizace vlastností litiny jádra odstředivě litého válce

Abstract

Thesis deals with the effect of the charge, vaccination and modification on the quality of the ductile iron used in the manufacture of the centrifugally cast rolls, as called filling cast iron, which forms the core and the pins of this massive castings. Under laboratory conditions were tested different variants of the chemical composition of the initial melt in combination with various ratios of the inoculant FeSi75 and the modifier FeSiMg (Biomet ™ 3). The first part of the thesis describes the history and the technology of centrifugal casting in the Czech Republic, and concepts vaccination and the modifications. In the second part is developed a proposal for conducting heats of the centrifugally cast bulky castings, by the retrieval method. The final section describes the actual realization and progress of the experiment, including partial results and final summary.