CAST IRON (OPTIONS) Russian patent published in 2015 - IPC C22C37/10 

FIELD: metallurgy.

SUBSTANCE: in compliance with one option the cast iron contains the following components, in wt %: carbon 3.5-4.0; silicon 2.0-2.5; manganese 0.6-0.8; copper 1.6-2.2; aluminium 0.2-0.25; calcium 0.001-0.0012; yttrium 0.003-0.007; lithium 0.0002-0.0003; nickel 1.0-1.4; rhenium 0.05-0.07; boron 0.06-0.1; iron - the rest. In compliance with another version the cast iron contains the following components, in %: carbon 3.5-4.0; silicon 2.0-2.5; manganese 0.6-0.8; copper 1.6-2.2; aluminium 0.2-0.25; calcium 0.001-0.0012; yttrium 0.003-0.007; lithium 0.0002-0.0003;cobalt 1.0-1.4; rhenium 0.05-0.07; tellurium 0.0006-0.001; iron - the rest.

EFFECT: higher strength of cast iron.

2 cl, 2 tbl