IMPROVED PROCEDURE FOR PRODUCTION OF MALLEABLE IRON Russian patent published in 2011 - IPC C21C1/08 C22C37/04 

FIELD: metallurgy.

SUBSTANCE: procedure consists in treatment of iron with initialiser corresponding to ferrosilicon alloy containing effective amount of barium sufficient for inactivation of oxygen activity of liquid iron, in processing liquid iron with magnesium containing spheroidiser at certain time upon preceding stage, in treatment of liquid iron with modifier facilitating eutectic formation of graphite inclusions and in iron casting. Ferrosilicon alloy has the following composition, wt %: 40-55 Si, 5-15 Ba, also the rest basically corresponds to iron with not necessary inconsiderable amounts, not more, than 10 % in sum, Al, Ca, Mn and/or Zr and unavoidable impurities.

EFFECT: processing base iron with changing content of oxygen; also, mechanical properties of parts, cast out of processed iron do not depend on initial contents of oxygen in base iron.

9 cl, 9 dwg, 1 tbl