CAST IRON MODIFIER AND METHOD FOR PRODUCING THE CAST IRON MODIFIER Russian patent published in 2022 - IPC C21C1/10 C22C37/00 C22C35/00 

Abstract RU 2772150 C2

FIELD: metallurgy.

SUBSTANCE: invention relates to a modifier for producing cast iron with spherical graphite. Modifier contains a ferrosilicon alloy in the form of particles, consisting of, wt.%: 40 to 80 Si; 0.02 to 8 Ca; 0 to 5 Sr; 0 to 12 Ba; 0 to 15 rare earth metal; 0 to 5 Mg; 0.05 to 5 Al; 0 to 10 Mn; 0 to 10 Ti; 0 to 10 Zr; the rest being Fe and random impurities in a usual amount, wherein the alloy additionally contains, as calculated for the total mass of the modifier, wt.%: 0.1 to 15 Sb2S3 in the form of particles and optionally 0.1 to 15 Bi2O3 in the form of particles, and/or 0.1 to 15 Sb2O3 in the form of particles, and/or 0.1 to 15 Bi2S3 in the form of particles, and/or 0.1 to 5 of one or more from Fe3O4, Fe2O3, FeO in the form of particles or a mixture thereof, and/or 0.1 to 5 of one or more from FeS, FeS2, Fe3S4 in the form of particles or a mixture thereof.

EFFECT: invention provides a modifier forming a large amount of crystallisation nuclei, providing a possibility of adding the modifier to a cast iron melt before casting, simultaneously with casting, or during intra-mould modification.

21 cl, 5 ex, 7 tbl, 8 dwg

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RU 2 772 150 C2

Authors

Ott, Emmanuelle

Knustad, Oddvar

Dates

2022-05-18Published

2018-12-21Filed