Yiziphi izigaba ezine zenqubo ye-vacuum sintering ye-Cemented Carbid

I-carbide enosimendei-vacuum sintering inqubo lapho ukucwiliswa kwe-sinter kwenziwa ngaphansi kwengcindezi engaphansi komkhathi.Le nqubo ihlanganisa ukususwa kwe-plasticizer, degassing, solid phase sintering, liquid phase sintering, alloying, densification, kanye nemvula yokuhlakazeka.Ake sibheke izinqubo ezine ezinkulu ze-cemented carbide vacuum sintering:

①Isiteji sokususa i-Plasticizer

Isiteji sokususa i-plasticizer siqala emazingeni okushisa asekamelweni futhi sikhuphuke siye ku-200°C.Igesi ekhangiswa ebusweni bezinhlayiya zempushana ku-billet ihlukaniswa nobuso bezinhlayiya ngokushisa futhi iphuma ku-billet ngokuqhubekayo.I-plasticizer ku-billet iyashisisa ukuze ibaleke ku-billet.Ukugcina izinga eliphezulu le-vacuum kusiza ekuphumeni nasekubalekeni kwamagesi.Izinhlobo ezahlukene ze-plasticizers zingaphansi kwezinguquko zokushisa ekusebenzeni kuyahlukahluka, ukuthuthukiswa kwenqubo yokususa i-plasticizer kufanele kunqunywe ngokuvumelana nezimo ezithile zokuhlolwa.Izinga lokushisa elijwayelekile le-plasticizer gasification lingaphansi kuka-550 ℃.

② Isiteji esixoshwe ngaphambili

Isiteji sangaphambi kwe-sintering sibhekisela ekushiseni okuphezulu kokushisa ngaphambi kwe-sintering, ukuze i-oksijini yekhemikhali ezinhlayiyeni zempushana kanye nokusabela kokunciphisa i-carbon ukukhiqiza igesi ye-carbon monoxide eshiya i-billet yokunyathelisa, uma le gesi ingakwazi ukukhishwa lapho kuvela isigaba se-liquid, izoba insalela ye-pore evaliwe ku-alloy, ngisho noma i-pressurized sintering, kunzima ukuyiqeda.Ngakolunye uhlangothi, ukuba khona kwe-oxidation kuzothinta kakhulu ukumanzisa kwesigaba soketshezi kuya esigabeni esiqinile futhi ekugcineni kuthinte inqubo yokuminyanai-carbide enosimende.Ngaphambi kokuvela kwesigaba se-liquid, kufanele sikhishwe ngokwanele futhi kusetshenziswe i-vacuum ephakeme kakhulu.

③ izinga lokushisa eliphezulu sintering esiteji

Ukushisa kwe-sintering kanye nesikhathi se-sintering kuyimingcele ebalulekile yenqubo yokuhlanganisa i-billet, ukwakheka kwesakhiwo esilinganayo kanye nokuthola izakhiwo ezidingekayo.Izinga lokushisa le-sintering kanye nesikhathi se-sintering sincike ekubunjweni kwe-alloy, usayizi we-powder, amandla okugaya wengxube nezinye izici, futhi kulawulwa ukuklama okuphelele kwezinto.

④Isigaba sokupholisa

Isigaba sokupholisa yilapho izinga lokupholisa lithinta ukubunjwa kanye nesakhiwo sesigaba esihlanganisiwe se-alloy futhi sikhiqiza ukucindezeleka kwangaphakathi.Izinga lokupholisa kufanele libe sesimweni esilawulwayo.I-Sintering hot isostatic pressing iyindlela entsha ye-sintering, eyaziwa nangokuthi i-low-pressure sintering, lapho umkhiqizo ucindezelwa ngengcindezi ethile yegesi ukuze kuthuthukiswe ukuminyana ngaphansi kwesimo sokuthi ukukhishwa kwegesi kuqediwe, izimbotshana ezingaphezulu kwe-billet ecindezelweyo. zivaliwe, futhi isigaba sokuhlanganisa sihlala siwuketshezi.