Umthelela wezakhi ezinhlanu ezinkulu ze-ductile iron ekubunjweni

Ukwakheka kwamakhemikhali ensimbi ye-ductile ikakhulukazi kuhlanganisa izakhi ezinhlanu ezivamile ze-carbon, i-silicon, i-manganese, isulfure ne-phosphorus. Kokunye ukulingisa okunezidingo ezikhethekile ekuhleleni nasekusebenzeni, inani elincane lezinto ze-alloying lifakiwe. Ngokungafani nensimbi evamile empunga, i-iron ductile kufanele futhi iqukathe amanani asele e-spheroidal element ukuze kuqinisekiswe i-graphite spheroidization. Senza anhlobonhloboukubuyiswa kwamaloli aseJapane nawaseYurophu, njengeubakaki wasentwasahlobo, intambo yasentwasahlobo,i-spring pin kanye ne-spring bushing.

1, Umgomo wokukhetha okulingana nekhabhoni nekhabhoni: ikhabhoni iyingxenye eyisisekelo ye-iron ductile, ikhabhoni ephezulu isiza ukwenza i-graphitization. Kodwa-ke, okuqukethwe kwekhabhoni ephezulu kuzodala ukuntanta kwegraphite. Ngakho-ke, umkhawulo ongaphezulu we-carbon elingana ne-ductile iron usekelwe kumgomo wokungabi nama-graphite antantayo.

2, Isimiso sokukhetha i-silicon: I-Silicon iyisici esiqinile se-graphitizing. Ku-iron ductile, i-silicon ayikwazi nje ukunciphisa ngempumelelo ukuthambekela komlomo omhlophe futhi yandise inani le-ferrite, kodwa futhi inendima yokucwenga amaqoqo e-eutectic kanye nokwenza ngcono ukujikeleza kwama-graphite sphere.

3, Isimiso sokukhetha i-Manganese: Njengoba okuqukethwe kwesibabule ku-iron ductile sekuvele kuphansi kakhulu, akudingi manganese eningi ukuze kuncishiswe isulfure, indima ye-manganese ku-iron ductile ikakhulukazi ekwandiseni ukuzinza kwe-pearlite.

4, Izimiso zokukhetha i-Phosphorus: i-phosphorus iyisici esiyingozi, i-solubility ephansi kakhulu ku-cast iron. Ngokuvamile, ukwehla kokuqukethwe kwe-phosphorus ku-iron ductile, kungcono.

I-5, Isimiso sokukhetha isibabule: Isibabule siyinto ephikisana ne-spherical, sinokuhlangana okuqinile ne-magnesium, umhlaba ongavamile nezinye izakhi ze-spheroidal, ukuba khona kwesibabule kuzodla izakhi eziningi ze-spheroidal ku-ferrofluid, ukwakheka kwe-magnesium nokungavamile. umhlaba we-sulfide, obangela i-slag, i-porosity nezinye izici zokuphonsa.

6, Umgomo wokukhetha ama-spheroidal elements: esimisweni sokuqinisekisa ukuthi i-spheroidal ifanelekile, inani elisele le-magnesium nomhlaba oyivelakancane kufanele libe phansi ngangokunokwenzeka. I-Magnesium nezinsalela zomhlaba ezingavamile ziphakeme kakhulu, zizokwandisa ukuthambekela komlomo omhlophe we-iron liquid, futhi kuzothinta izakhiwo zemishini ye-castings ngenxa yokuhlukaniswa kwazo emingceleni yokusanhlamvu.