Popanga Ductile Iron (yomwe imadziwikanso kuti Ductile Iron), kugwiritsa ntchito ma carburizer apamwamba kwambiri ndikofunikira kuti mukwaniritse zomwe mukufuna pazomaliza.Recarburizer yomwe imagwiritsidwa ntchito kwambiri ndigraphite petroleum coke (GPC), yomwe imapangidwa kuchokera ku petroleum coke kupyolera mu kutentha kwapamwamba kwambiri.

Posankha recarburiser yopanga chitsulo cha ductile, zinthu zingapo ziyenera kuganiziridwa.Zovuta kwambiri pazifukwa izi ndizomwe zili ndi kaboni, sulfure, phulusa, zinthu zosasunthika, zomwe zili ndi nayitrogeni ndi hydrogen.

Mpweya wokhazikika wa carbon ndi kuchuluka kwa carbon yomwe yatsala mu graphite petroleum coke pambuyo pa kutenthedwa ndi phulusa zonse zatenthedwa.Kukwera kwa kaboni wokhazikika, m'pamenenso recarburiser imakulitsa kuchuluka kwa kaboni muchitsulo chosungunuka.graphite petroleum coke ndi zokhazikika mpweya zili osachepera 98% akulimbikitsidwa kupanga ductile chitsulo.

Sulfure ndi chodetsa chofala mu graphite petroleum coke ndipo kupezeka kwake kumatha kusokoneza zomaliza za chitsulo cha ductile.Choncho, ndikofunika kusankha graphite petroleum coke ndi otsika sulfure okhutira (nthawi zambiri zosakwana 1%).

Phulusa ndi kuchuluka kwa zinthu zosayaka zomwe zimapezeka mu graphite petroleum coke.Phulusa lambiri limapanga slag mu ng'anjo, zomwe zimawonjezera ndalama ndikuchepetsa mphamvu.Ichi ndichifukwa chake tikulimbikitsidwa kugwiritsa ntchito graphite petroleum coke yokhala ndi phulusa lomwe lili pansi pa 0.5%.

Zinthu zosasunthika zimaphatikizapo mpweya uliwonse kapena zakumwa zomwe zimatulutsidwa pamene graphite petroleum coke yatenthedwa.Zomwe zili pamwambazi zimasonyeza kuti graphite petroleum coke imatha kutulutsa mpweya wambiri, womwe ungapangitse porosity mu chinthu chomaliza.Chifukwa chake, graphite petroleum coke yokhala ndi zinthu zosakhazikika zosakwana 1.5% iyenera kugwiritsidwa ntchito.

Nayitrojeni ndi zonyansa zina mu graphite petroleum coke zomwe ziyenera kuchepetsedwa chifukwa zingakhudze makina a chitsulo cha nodular cast.graphite petroleum coke yokhala ndi nayitrogeni wosakwana 1.5% ndiyoyenera kupanga nodular cast iron iron.

Pomaliza, zomwe zili ndi haidrojeni ndi chinthu chinanso chomwe chiyenera kuganiziridwa posankha chokwezera mpweya pakupanga chitsulo cha nodular.Kuchulukira kwa haidrojeni kungapangitse kuwonjezereka kwa brittleness ndi kuchepetsa ductility.graphite petroleum coke yokhala ndi haidrojeni yochepera 0.5% ndiyo yabwino.

Mwachidule, kupanga chitsulo cha nodular kumafuna chokwezera kaboni chapamwamba kwambiri chomwe chimakwaniritsa zofunikira zenizeni za kaboni wokhazikika, sulfure, phulusa, zinthu zosakhazikika, nitrogen, ndi hydrogen.Kugwiritsiridwa ntchito kwa graphite petroleum coke komwe kumakwaniritsa zofunikirazi kudzatsimikizira kupanga chitsulo chapamwamba cha nodular cast iron, chomwe chimatchedwanso Ductil Iron kapena SG iron.