Geedi -socodka suuxinta dhaqameedka iyo dhibaatooyinka jira

Spheroidizing dhaqameedka daweynta ka -hortagga wuxuu u qaybsan yahay labada marxaladood ee soo socda.

(1) Marxaladda diyaarinta spheroidization, birta la miiray oo la suuxiyay ayaa loo kululaynayaa 30-50 ° C oo ka sarraysa meesha muhiimka ah waxaana la hayaa 1 illaa 2 saacadood oo loogu talagalay austenitization, si carbides-ku u milmaan austenite. Kadibna si dhaqso ah ayaa loo qaboojiyaa meel ka hooseysa barta muhiimka ah ee Ac si loo helo badarka kristal wanaagsan oo la safeeyo carbides -ka si loo fududeeyo is -daba -marinta dambe. Sifaynta badarka iyo sifeynta carbides -ku waxay abuuraan shuruudo loogu talagalay spheroidization siman, markaa marxaladdan waxaa loogu yeeraa marxaladda diyaarinta spheroidization. Caadi ahaan, marxaladda u diyaargarowga spheroidization waxay ka bilaabataa kululaynta birta ilaa 850 ~ 900 ° C oo lagu hayo 1 ~ 2h, taas oo qaadata qiyaastii toban saacadood guud ahaan.

(2) Marxaladda spheroidizing, birta waa la qalabeeyay oo la qaboojiyaa 700 ~ 750 ° C oo la hayaa ilaa 10 saacadood, si carbides -ka la safeeyey ay u samaysan doonaan carbides -goobeed iyada oo loo marayo isku -duubnaanta iyo faafinta, dhammaystirka geedi -socodka spheroidizing -ka.

Laga soo bilaabo geedi -socodka kor -u -qaadista ee kor ku xusan, waxaa lagu soo gabagabeyn karaa in birta eutectoid iyo birta hypereutectoid oo leh kaarboon sare, iyada oo la raacayo ficilka heerkulka sare muddo dheer, marka hore waxay sababi kartaa oksaydhka iyo dearburization oogada birta, taas oo yaraynaysa tayada dusha sare ee birta; Ilaalinta kulaylka spheroidization waqtiga waxay kordhisaa isticmaalka tamarta waxayna yareysaa waxtarka wax soo saarka. Sidaa darteed, waxaa la rajaynayaa in habsocodka suuxinta degdegga ah ee spheroidizing la baran karo si loo soo gaabiyo wareegga suuxinta laf -dhabarta loona hagaajiyo tayada dusha birta.