COMPLEX MODIFIER FOR GRAPHITIZED ANTIFRICTION CAST IRONS Russian patent published in 2024 - IPC C21C1/08 C22C37/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to a composition for complex modification of gray antifriction iron, which is used to make parts operating in friction assemblies, in particular for piston rings. Complex modifier contains, wt.%: MF9 GOST 4515-93 45.0–65.0, silicon 15.0–20.0, calcium 0.5–3.0, aluminum 0.1–1.0, strontium 1.0–2.0, rare-earth metals 1.0–3.0, iron—the rest.

EFFECT: invention improves operational and tribotechnical characteristics, including coefficient of friction, as well as increases hardness and strength of castings from gray antifriction iron.

1 cl, 1 tbl