Cemented carbidevacuum sintering inzira iyo sintering inoitwa pamhepo iri pasi pemhepo.Maitiro aya anosanganisira kubviswa kwe plasticizer, degassing, solid phase sintering, liquid phase sintering, alloying, densification, uye dissolution kunaya.Ngatitarisei maitiro mana makuru ecemented carbide vacuum sintering:
①Plasticizer yekubvisa nhanho
Iyo plasticizer yekubvisa nhanho inotanga kubva mukamuri tembiricha uye inokwira kusvika ku200 ° C.Iyo gasi yakashambadzirwa pamusoro pehupfu hwehupfu mubillet inoparadzaniswa kubva pamusoro pezvimedu nekupisa uye inopukunyuka kubva mubillet nguva dzose.Iyo plasticizer mubillet inopisa kutiza kubva mubillet.Kuchengeta yakakwira vacuum level inobatsira kuburitswa uye kupukunyuka kwemagasi.Mhando dzakasiyana dzeplasticizers dziri pasi pekupisa shanduko mukuita kwakasiyana, kusimudzira kweplasticizer kubviswa maitiro kunofanirwa kutariswa zvinoenderana nemamiriro chaiwo ebvunzo.Iyo yakawanda plasticizer gasification tembiricha iri pazasi 550 ℃.
② Pre-fired stage
Pre-sintering nhanho inoreva tembiricha yekupisa isati yatanga, kuitira kuti kemikari okisijeni muupfu zvidimbu uye kabhoni kuderedza kuita kuti ibudise kabhoni monoxide gasi ichisiya iyo press billet, kana gasi iri risingakwanisi kubviswa kana chikamu chemvura chikaonekwa, ichava yakavharwa pore yakasara mu alloy, kunyange kana yakamanikidzwa sintering, zvakaoma kubvisa.Kune rimwe divi, kuvepo kweoxidation kuchakanganisa zvakanyanya kunyorova kwechikamu chemvura kusvika kune chakaoma chikamu uye pakupedzisira kukanganisa densification maitiro eiyo.simende carbide.Pamberi pechikamu chemvura chisati chaoneka, chinofanira kunge chakadzimwa zvakakwana uye chepamusoro-soro chinogona kushandiswa.
③ High tembiricha sintering danho
Iyo sintering tembiricha uye sintering nguva yakakosha maitiro paramita ye densification yebillet, kuumbwa kweiyo homogeneous chimiro uye kuwana inodiwa zvivakwa.Iyo tembiricha yekupisa uye sintering nguva zvinoenderana nekuumbwa kwealloy, saizi yehupfu, kukuya simba remusanganiswa uye zvimwe zvinhu, uye zvakare inotongwa neyakajairwa dhizaini yezvinhu.
④Chinhanho chekutonhora
Nhanho yekutonhodza ndiyo iyo chiyero chekutonhora chinokanganisa kuumbwa uye chimiro chechikamu chakasungwa chealloy uye chinoburitsa kushushikana kwemukati.Chiyero chekutonhodza chinofanira kunge chiri munzvimbo inodzorwa.Sintering inopisa isostatic kudzvanya inzira nyowani yekuisa, inozivikanwawo seyakaderera-kudzvanya sintering, umo chigadzirwa chinomanikidzwa neimwe kudzvanywa kwegasi kusimudzira densification pasi pemamiriro ekuti degassing yapera, ma pores ari pamusoro peakatsikirirwa billet. akavharwa, uye binder chikamu chinoramba chiri mvura.
Nguva yekutumira: Jun-20-2023
