Inani le-crystal nuclei liyancishiswa lapho i-eutectic crystallization ye-cast iron incibilika esithandweni sokuncibilika sokungeniswa.

Ekuncibilikeni kwe-cupola, isikhathi esisuka ekuncibilikeni kwenkokhiso ukuya ekuphumeni kwensimbi encibilikisiwe esithandweni sifushane kakhulu, cishe imizuzu eyi-10. Lapho uncibilika ku- ukuchithwa kwesithando somlilo, kuthatha okungenani ihora elingu-1 kusukela ekuqaleni kokushaja kuya ekuthinteni insimbi, futhi iphinde ibe nomphumela oyingqayizivele oshukumisayo wokushisa kokungeniswa, okunciphisa kakhulu ukwaziswa okusensimbi encibilikisiwe engasetshenziswa njenge-nucleus yangaphandle yegraphite. ngesikhathi se-eutectic crystallization. . Isibonelo, i-SiO2, engasetshenziswa njenge-nucleus yekristalu yangaphandle, ingasabela kalula nekhabhoni ensimbi ekhonjiwe futhi inyamalale lapho izinga lokushisa liphezulu kakhulu futhi kuba nomphumela onyakazayo:

SiO2＋O2→Si＋2CO↑

Ngakho-ke, lapho kuncibilika i-iron grey cast esithandweni sokuncibilika se-induction, ukunakwa okukhethekile kufanele kukhokhwe ekwelashweni kwe-inoculation. Inani le-inoculant kufanele libe ngaphezulu kancane kunalelo ekuncibilikeni kwe-cupola. Kungcono ukwenza i-pre-incubation (pre-inoculation) esithandweni ngaphambi kokukhishwa. Ukwenza ngcono izimo ze-nucleation ye-cast iron eutectic crystallization.