In-Mould Graphitizing, Spheroidizing, and Carbide Stabilizing Inoculation of Cast Iron Melt
M. A. Fesenko$^1$ and A. M. Fesenko$^2$
$^1$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 9 Bldg., 35 Politekhnichna Str., UA-03056 Kyiv, Ukraine
$^2$Donbas State Engineering Academy, 72 Akademichna Str., UA-84313 Kramatorsk, Donetsk Region, Ukraine
Received 05.11.2019; final version — 05.03.2020 Download PDF
The results of investigations on optimization of granulometric composition of additives for in-mould graphitizing, carbide stabilizing, and spheroidizing inoculation of cast-iron melt are reviewed and analysed. As revealed, the maximum absorption of graphitizing ferrosilicon inoculant FeSi75 and spheroidizing inoculant FeSiMg7 during treatment of melts in the reaction chamber of a mould is achieved by means of grain size of 5.0 $\pm$ 2.5 mm. The most effective inoculative additive for in-mould carbide-stabilizing treatment of cast iron is an alloy of nickel with magnesium of the NiMg15 grade. Independently on the grain size in the range from 1 to 10 mm, the alloy of nickel and magnesium is sufficiently soluble by the flow of molten iron during the mould filling. New technological ways for intensification of in-mould treatment of cast-iron melt using the fine dispersed (including powdery) additives are proposed and studied.
Keywords: casting, inoculant, grey iron, white iron, ductile iron, graphitizing inoculation, carbide-stabilizing inoculation, spheroidization inoculation, granulometric composition, reaction chamber.
Citation: M. A. Fesenko and A. M. Fesenko, In-Mould Graphitizing, Spheroidizing, and Carbide Stabilizing Inoculation of Cast Iron Melt, Progress in Physics of Metals, 21, No. 1: 83–101 (2020)