Technology for producing cast iron castings with compact graphite by top filling

¹ Togliatti State University, Department of Nanotechnology, Materials Science and Mechanics, 445020 Tolyatti, Russia
² Nosov Magnitogorsk State Technical University, Department of Metal Forming Machines and Technologies, 455000 Magnitogorsk, Russia
³ Novotroitsk Branch of the National University of Science and Technology MISIS (NUST MISIS, Novotroitsk Branch), 426359 Novotroitsk, Russia

^* Corresponding author: ruslan246@mail.ru

Abstract

The technology of ladle modification “top filling” has been tested and introduced to produce castings of parts from low grades of high-strength cast iron, in particular ChVG40, VCh50. The technology allows us to consistently achieve a degree of graphite spheroidization of at least 80%. For each of the mastered castings of the parts “Reduction gear axle casing”, “Front idler hub” and “Exhaust manifold”, the consumption of a spheroidizing modifier and a graphitizing modifier was selected. In the chemical composition of the castings, to obtain a predominantly ferrite-pearlite structure, the manganese content was adjusted from 0.4...0.5% to 0.3...0.4%.