Bari mu ci gaba da gabatar da kowane tsari na fasahar Injection Molding Metal.
A yau za mu tattauna game da sintering wanda shine mafi mahimmanci a lokacin MIM.
GIDAN ILMIN ZUMUNCI
1) Sintering shi ne don zafi da jin ƙanƙara a cikin zafin jiki ƙasa da wurin narkewar manyan abubuwan da ke cikinsa, sa'an nan kuma sanyaya shi ta wata hanya da sauri, ta yadda za a inganta strenth da nau'o'in kayan aiki na jiki da na inji da kuma samun su. wani tsarin metallographic.
2) Tsarin asali shine foda m-Furnace Cajin-Sintering ciki har da Preheating, Heat Preservation da Cooling-Firing-Sintered kayayyakin.
3) Ayyukan sintering shine samun cire mai mai, haɗin ƙarfe, haɓaka abubuwa, canje-canjen girma, microstructure da rigakafin ocidation.
TAKAITACCEN GABATAR DA HANYAR ZUMUNCI
1) Matsayin ƙarancin zafin jiki na pre-sintering:
A cikin wannan mataki, dawo da karfe, volatilization na adsorbed gas da danshi, bazuwa da kuma cire forming wakili a cikin m.
2) Matsayin dumama zafin jiki na matsakaici:
Recrystallization yana farawa a wannan matakin.Na farko, ana mayar da nakasassun hatsin kristal a cikin ɓangarorin kuma an sake tsara su zuwa sabbin hatsin kristal.A lokaci guda, oxides da ke saman ɓangarorin suna raguwa gaba ɗaya, kuma ƙirar ƙwayar cuta ta haifar da wuyan wuyan.
3) High termperature ji kiyayewa don kammala sintering mataki:
Wannan mataki shine babban tsari na sintering, kamar yadawa da gudana gabaɗaya gabaɗaya kuma kusa da kammalawa, samar da adadi mai yawa na rufaffiyar pores, da kuma ci gaba da raguwa, don girman girman girman da adadin adadin pores ya ragu, da yawa. na sintered jiki ne da muhimmanci ya karu.
4) Matakin sanyaya:
Ainihin tsarin ɓacin rai yana ci gaba da ɓarna, don haka tsari daga yanayin zafin jiki zuwa jinkirin sanyaya na wani ɗan lokaci sannan kuma saurin sanyaya har sai abin da wutar tanderun ke fitarwa ya kai ga yanayin ɗaki shima mataki ne da austenite ke ruɓe kuma a hankali tsarin ƙarshe ya kasance.
Akwai abubuwa masu tasiri da yawa don shafar tsarin sintiri.Kuma abubuwan da suka haɗa da zafin jiki, lokaci, yanayi, abun da ke ciki na kayan abu, hanyar gami, abun cikin mai mai da tsarin sintering kamar dumama da sanyaya.Ana iya ganin cewa kowane haɗin gwiwa yana da tasiri mai mahimmanci akan ingancin sintering.Don samfuran da ke da tsari daban-daban da foda daban-daban, ana buƙatar daidaita sigogi daban-daban.
Lokacin aikawa: Janairu-15-2021