Njengegama lamazinyo ezimbonini ze-carbide, iningi lalabo abalisebenzisayo abazi ukuthi i-carbide ikhiqizwa kanjani futhi yimuphi umehluko enqubweni yayo yokukhiqiza, empeleni, ukukhiqizwa kwe-carbide kuhlobene nokusetshenziswa kwayo kwemvelo.Isibonelo, i-carbide yezimayini, i-carbide yokumba amatshe, carbideamathuluzi okuguqula, njll. wonke asekelwe ekusetshenzisweni kwemvelo.Kukhona futhi isibonelo carbide ukumelana nokugqwala nokunye.
Ikhiqizwa kanjani i-Cemented Carbide?Iyini inqubo yokukhiqiza?
Inqubo yokukhiqizwa kwe-carbide enosimende ngokuvamile imi kanje: izinhlanganisela eziqinile zensimbi (i-tungsten carbide, i-tantalum carbide, njll.), insimbi yokubopha (i-cobalt powder noma i-nickel powder) kanye nenani elincane lezithasiselo (i-stearic acid noma i-esomin) ixutshwe futhi umhlabathi endaweni yokugaya i-hexane, bese kwengezwa udaka lwe-wax kapharafini, bese kuthi i-vacuum yomisiwe (noma isifutho esomisiwe), ihlungwe, ihlulwe, futhi yenziwe into ehlanganisiwe;impahla ehlanganisiwe ikhonjwa futhi ifanelekile, futhi ngemva kokunemba Impahla ehlanganisiwe ihlonzwa futhi ifanelekile, bese icindezelwa ukwenza i-billet yokucindezela ephezulu yokunemba;I-billet ecindezelweyo ifakwe i-vacuum dewaxing noma i-low-pressure sintering ukuze yenziwei-carbide enosimende.
Sintering isimiso
Inqubo ye-vacuum sintering yenziwa ngokushisa ngaphansi kwezimo ze-vacuum, okulungele ukuqeda ukungcola, ukuthuthukisa ukuhlanzeka komkhathi we-sintering, ukuthuthukisa ukumanzisa kwesigaba sokubopha kanye nokukhuthaza ukusabela.I-billet ecindezelweyo ifudunyezwa ku-vacuum sintering atmosphere, futhi njengoba izinga lokushisa likhuphuka futhi lifinyelela izinga lokushisa lokuhwamuka, liyaphuma ku-billet elicindezelwe futhi libanjwe isikhathi esanele ngomfutho oyingxenye womoya kapharafini ongaphansi kwalelo zinga lokushisa, kanye nopharafini. ikhishwe ku-billet ecindezelweyo futhi ilulame, futhi i-billet ecindezelwe iyahlanzwa.Njengoba izinga lokushisa likhuphuka ngokuqhubekayo, i-billet ikhishwa futhi ihlanjululwe ngokuqhubekayo, futhi i-solid-phase sintering ilandela.Enqubweni ye-sintering yesigaba esiqinile, ama-athomu (noma ama-athomu) engxenye ngayinye emzimbeni we-sintered asakazeka, indawo yokuxhumana yezinhlayiyana iyanda, ibanga phakathi kwezinhlayiya liyancipha, umzimba osikiwe uyashwabana futhi uqina nakakhulu.Uma izinga lokushisa liseduze nendawo yokuncibilika yesigaba esiboshiwe, isigaba esiboshiwe siqala ukugeleza kwepulasitiki, futhi lapho izinga lokushisa lesigaba se-liquid lifinyelelwa, umzimba we-sintered ukhiqiza isigaba se-liquid kanye nesigaba se-liquid sintering.
Esikhathini senqubo ye-liquid sintering, ungqimba lwesigaba se-liquid luvela endaweni ye-carbide, futhii-carbideizinhlayiya zincibilika esigabeni sokubopha ngokusatshalaliswa ukuze zenze i-eutectic, futhi izinhlayiya ze-carbide ziphinde zikhule futhi zikhule ngosayizi ngesigaba soketshezi, ukuze izinhlayiya eziseduze ze-carbide zixhumeke eduze, futhi umzimba we-sintered uyancipha ngokuqhubekayo futhi uminyene ngokushesha.Umzimba we-sintered uyancipha futhi futhi uminyene ngokushesha.Igcinwa ezingeni lokushisa elingaphezu kwezinga lokushisa le-sintering lesigaba soketshezi isikhathi esithile ukuze kuvunyelwe inqubo yokucwilisa ukuthi iqhubeke ngokugcwele, bese ipholiswa phansi.
Kuyo yonke inqubo ye-sintering, umzimba we-sintered uhlanganiswa eduze nokungewona i-porosity, futhi uchungechunge lwemiphumela ye-physicochemical kanye nokulungiswa kwenhlangano kukhiqizwa, okuholela ekwakhekeni kwe-carbide eminyene, enosimende enokwakheka kwamakhemikhali athile, izakhiwo ezingokomzimba nezomshini, futhi isakhiwo senhlangano.
Isikhathi sokuthumela: Jun-29-2023
