Menene sakamakon wuce gona da iri na simintin ƙarfe

1. Sakamakon wuce gona da iri na simintin ƙarfe

1.1 Idan allurar ta wuce kima, abun cikin siliki zai yi girma, kuma idan ya wuce wani ƙima, ɓarna silicon zai bayyana.Idan abun ciki na silicon na ƙarshe ya wuce daidaitattun, zai kuma haifar da kauri na nau'in graphite A;Hakanan yana da saurin raguwa da raguwa, kuma adadin matrix F zai karu;Hakanan za a sami ƙarancin lu'u-lu'u.Idan akwai ƙarin ferrite, ƙarfin zai ragu maimakon.

1.2 Ƙunƙarar ƙwayar cuta mai yawa, amma abun ciki na silicon na ƙarshe bai wuce ma'auni ba, mai sauƙi don samar da raguwa da raguwa, tsarin yana tsaftacewa, kuma ƙarfin yana inganta.

1.3 Idan adadin inoculation ya yi girma sosai, hazo na graphite zai ragu yayin tsarin ƙarfafawa, haɓakar simintin ƙarfe na simintin ƙarfe zai ragu, haɓakar ƙungiyoyin eutectic zai haifar da rashin abinci mara kyau, kuma raguwar ruwa zai zama mafi girma, yana haifar da raguwa. porosity.

1.4 Yin allura mai yawa na baƙin ƙarfe nodular zai ƙara yawan gungu na eutectic kuma yana ƙara haɓakar sassautawa, don haka akwai adadi mai ma'ana na inoculation.Wajibi ne a ga ko adadin eutectic clusters ya yi ƙanƙara ko girma a ƙarƙashin metalography, wato, matsa lamba Me yasa kula da adadin inoculum, kuma dalilin da yasa inoculum na hypereutectic ductile baƙin ƙarfe ya yi yawa zai haifar da graphite. yin iyo.

2. Tsarin inoculation na simintin ƙarfe

2.1 Ductile iron shrinkage gabaɗaya yana haifar da jinkirin saurin sanyaya da tsayin lokaci mai ƙarfi, wanda ke haifar da gurɓacewar hoto a tsakiyar simintin gyare-gyare, rage yawan ƙwallaye, da manyan ƙwallayen graphite.Adadin ragowar magnesium, sarrafa adadin ragowar ƙasa mara nauyi, ƙara abubuwan ganowa, ƙarfafa rigakafi da sauran matakan fasaha.

2.2 Lokacin yin allura a cikin baƙin ƙarfe na ductile, abun ciki na siliki na narkakken ƙarfe na asali yana da ƙasa, wanda ke ba ku yanayi don ƙara ƙwayar cuta.Adadin allurar da mutane daban-daban suka ƙara na iya bambanta.Daidai, amma kuma bai isa ba.

3. Yawan inoculant da aka kara wa simintin ƙarfe

3.1 Matsayin inoculant: inganta graphitization, inganta rarrabuwar sifa da girman graphite, rage halayen fari, da haɓaka ƙarfi.

3.2 Adadin inoculant ƙara: 0.3% a cikin jaka, 0.1% a cikin mold, 0.4% a duka.