Yadda za a inganta inji Properties na simintin gyaran kafa launin toka baƙin ƙarfe?
Iron simintin gyare-gyaren ƙarfe ne na ƙarfe-carbon alloy wanda sashin sashe yayi launin toka. Ta hanyar sarrafa abun da ke ciki da tsarin ƙarfafawa, carbon yafi bayyana a cikin nau'i na graphite flake. Tsarin metallographic na baƙin ƙarfe simintin launin toka ya ƙunshi graphite flake, matrix ƙarfe da eutectic iyakar hatsi.
Kasancewar flake graphite a cikin baƙin ƙarfe simintin launin toka yana lalata ainihin ci gaban ƙarfe kuma yana sanya baƙin ƙarfe launin toka ya zama abu mara ƙarfi. Amma ƙarfen simintin gyaran gashi na ɗaya daga cikin kayan ƙarfe na farko da aka fi amfani da su.Simintin gyare-gyaren ƙarfe mai launin tokasuna da kaddarori masu yawa. Na dogon lokaci, a cikin aikin samarwa, mun taƙaita wasu matakan gama gari don inganta ƙarfin juzu'i na simintin simintin ƙarfe. Ƙarƙashin wasu sharuɗɗa, za mu iya kuma inganta aikin yankan, juriya da juriya da aikin shanyewar baƙin ƙarfe mai launin toka.
A ainihin samar da simintin gyare-gyare, mafi yawancin baƙin ƙarfe mai launin toka mai launin toka shine hypoeutectic. Saboda haka, don inganta ƙarfin ƙarfinsa, ya kamata a yi abubuwa masu zuwa kamar yadda zai yiwu:
1) Tabbatar da baƙin ƙarfe simintin launin toka yana da ƙarin haɓakar dendrites na farko austenite yayin ƙarfafawa.
2) Rage adadin eutectic graphite kuma sanya shi a rarraba shi daidai da kyaun A-type graphite.
3) Ƙara yawan gungun eutectic
4) Yayin canjin eutectoid austenite, duk suna canzawa zuwa matrix pearlite mai kyau
A cikin ainihin samar da simintin ƙarfe na simintin ƙarfe, muna yawan amfani da matakan da ke gaba don cimma sakamakon da ke sama:
1) Zabi madaidaicin sinadaran sinadaran
2) Canja abun da ke cikin cajin
3) Narkakken ƙarfe mai zafi fiye da kima
4) Maganin rigakafi
5) Trace ko low alloying
6) Maganin zafi
7) Ƙara yawan sanyaya yayin canjin eutectoid
Takamaiman matakan da za a ɗauka sun dogara da nau'in simintin simintin ƙarfe na launin toka, abubuwan da ake buƙata da takamaiman yanayin samarwa. Koyaya, sau da yawa ya zama dole a ɗauki matakai biyu ko fiye don cimma aikin da ake so na simintin ƙarfe.
Lokacin aikawa: Dec-28-2020