Yetsika spheroidizing annealing maitiro uye ayo aripo matambudziko

Iyo yechinyakare spheroidizing annealing kurapwa rakakamurwa muzvikamu zviviri zvinotevera.

(1) Muchikamu chekugadzirira spheroidization, iyo simbi yekushongedzwa uye kuvharwa inodziyirwa kusvika 30-50 ° C pamusoro pechinzvimbo chakakomba uye inobatwa kwe1 kusvika 2 maawa kuitira austenitization, kuitira kuti ma carbides anyungudike kuita austenite. Izvo zvinobva zvadzora nekukasira kusvika pazasi pechinonyanya kukosha Ac kuti vawane zviyo zvinoonekera zvekristaro uye nekunatsiridza macarbides kuti afambise anotevera spheroidization. Kuchenesa zviyo nekunatsa carbides zvinogadzira mamiriro ekutsvedza spheroidization, saka danho iri rinodaidzwa kuti spheroidization gadziriro yekugadzirira. Kazhinji, nhanho yekugadzirira spheroidization inotanga kubva pakupisa simbi kusvika ku850 ~ 900 ° C uye kuibata kwe1 ~ 2h, zvinotora anenge maawa gumi zvachose.

(2) Padanho re spheroidizing, simbi yakasimbiswa uye yakatonhora kusvika 700 ~ 750 ° C uye inochengetwa kwemaawa anenge gumi, kuitira kuti carbides yakanatswa iumbe idenderedzwa carbides kuburikidza nekubatana uye kupararira, ichipedzisa iyo spheroidizing uye annealing maitiro.

Kubva pane yekumusoro spheroidization maitiro, zvinogona kugumiswa kuti iyo eutectoid simbi uye hypereutectoid simbi ine yakakwira kabhoni zvemukati, pasi pechiito chekukwirira tembiricha kwenguva yakareba, chekutanga chinokonzera oxidation uye decarburization yesimbi pamusoro, iyo inoderedza iyo yepamusoro mhando yeiyo simbi; Nguva spheroidization kupisa kuchengetedzwa kunowedzera simba rekushandisa uye kunoderedza kugona kwekugadzira. Naizvozvo, zvinotarisirwa kuti iyo yekukurumidza spheroidizing yekubatanidza maitiro inogona kudzidziswa kupfupisa iyo spheroidizing annealing kutenderera uye kugadzirisa iyo yepamusoro mhando yesimbi.