Farin ƙarfe: Kamar sukari da muke sakawa a shayi, carbon ɗin yana narkewa gaba ɗaya a cikin ruwa. Idan wannan carbon da aka narkar a cikin ruwan ba za a iya raba shi da ruwa ba yayin da ƙarfen da aka narkar ya taurare, amma ya ci gaba da narkewa gaba ɗaya a cikin tsarin, muna kiran tsarin da ya haifar da farin ƙarfe. Farin ƙarfe da aka narkar, wanda ke da tsari mai rauni sosai, ana kiransa farin ƙarfe da aka narkar saboda yana nuna launin fari mai haske idan ya karye.
Baƙin ƙarfe mai launin toka: Yayin da baƙin ƙarfe mai launin ruwan da aka yi amfani da shi wajen ƙarfafawa, carbon da aka narkar a cikin ƙarfe mai ruwa, kamar sukari a cikin shayi, na iya fitowa a matsayin wani lokaci daban yayin ƙarfafawa. Idan muka bincika irin wannan tsari a ƙarƙashin na'urar hangen nesa, za mu ga cewa carbon ya ruske ya zama wani tsari daban da ido zai iya gani, a cikin siffar graphite. Muna kiran wannan nau'in baƙin ƙarfe mai launin toka, domin lokacin da wannan tsari, wanda carbon ya bayyana a cikin lamellae, wato, a cikin yadudduka, ya karye, launin toka mai duhu ya bayyana.
Baƙin ƙarfe mai tabo: Farin ƙarfe da muka ambata a sama suna bayyana a cikin yanayin sanyaya da sauri, yayin da baƙin ƙarfe mai launin toka ke bayyana a cikin yanayin sanyaya mai sauƙi. Idan saurin sanyaya ɓangaren da aka zuba ya yi daidai da kewayon inda canjin fari zuwa launin toka ke faruwa, yana yiwuwa a ga cewa tsarin launin toka da fari sun bayyana tare. Muna kiran waɗannan baƙin ƙarfe masu tabo saboda lokacin da muka karya irin wannan yanki, tsibiran launin toka suna bayyana a kan farin bango.
Baƙin ƙarfe mai zafi: Wannan nau'in ƙarfen simintin a zahiri yana tauri kamar farin ƙarfe. A wata ma'anar, ana tabbatar da tauri na ƙarfen simintin ta yadda carbon ɗin zai kasance gaba ɗaya a cikin tsarin. Sannan, ana yin maganin zafi ga ƙarfen siminti ...
Baya ga wannan rarrabuwa, idan carbon ya sami damar rabuwa da tsarin sakamakon tauri (kamar yadda yake a cikin ƙarfe masu launin toka), za mu iya yin wani rarrabuwa ta hanyar duba halayen graphite na asali:
Baƙin ƙarfe mai launin toka (lamellar graphite): Idan carbon ya taurare wanda ya haifar da tsarin graphite mai layi kamar ganyen kabeji, muna kiran irin waɗannan baƙin ƙarfe masu siminti kamar baƙin ƙarfe mai launin toka ko lamellar graphite. Za mu iya ƙarfafa wannan tsarin, wanda ke faruwa a cikin ƙarfe inda iskar oxygen da sulfur suke da yawa, ba tare da nuna yawan raguwar zafi ba saboda yawan watsawar zafi.
Karfe mai siffar siffa ta graphite: Kamar yadda sunan ya nuna, mun ga cewa a cikin wannan tsari, carbon yana bayyana a matsayin ƙwallon graphite mai siffar siffa ta ƙwallo. Domin graphite ya ruguje ya zama tsarin siffa ta ƙwallo maimakon tsarin lamellar, dole ne a rage iskar oxygen da sulfur a cikin ruwan ƙasa da wani matakin. Shi ya sa lokacin da muke samar da ƙarfe mai siffar siffa ta spheroidal graphite, muna magance ƙarfe mai launin ruwa da magnesium, wanda zai iya amsawa da sauri da iskar oxygen da sulfur, sannan mu zuba shi a cikin molds.
Iron ɗin simintin Vermicular Graphite: Idan maganin magnesium da aka yi amfani da shi yayin samar da ƙarfen simintin spheroidal graphite bai isa ba kuma ba za a iya yin amfani da graphite gaba ɗaya ba, wannan tsarin graphite, wanda muke kira vermicular (ko ƙaramin), na iya fitowa. Graphite na Vermicular, wanda shine tsari na canzawa tsakanin nau'ikan graphite na lamellar da spheroidal, ba wai kawai yana ba da ƙarfen siminti tare da manyan halayen injiniya na graphite na spheroidal ba, har ma yana rage yanayin raguwa saboda yawan ƙarfinsa na zafi. Wannan tsari, wanda ake ɗauka a matsayin kuskure wajen samar da ƙarfen simintin spheroidal graphite, ana yin sa ne da gangan ta hanyar masana'antun ƙarfe da yawa saboda fa'idodin da aka ambata a sama.
Lokacin Saƙo: Disamba-20-2024