Ukukhethwa kwezibophezelo ze-powder metallurgy,ubuchwepheshe bokubumba umjovo we-metal powderiwumkhiqizo wokuhlanganisa nokuhlangana kobuchwepheshe bokubumba ipulasitiki, ikhemistri ye-polymer, ubuchwepheshe be-powder metallurgy kanye nesayensi yezinto zensimbi. Isikhunta singasetshenziselwa ukujova okungenalutho futhi sikudlulise ku-Sintering kungakhiqiza ngokushesha izingxenye zesakhiwo ezinobukhulu obuphezulu, obunembayo obuphezulu, obunezinhlangothi ezintathu eziyinkimbinkimbi. Ingenza ngokushesha nangokunembile imibono yokuklama ibe yimikhiqizo enezici ezithile zesakhiwo nokusebenza, futhi ingakhiqiza izingxenye eziningi ngokuqondile. Kuwushintsho olusha embonini yobuchwepheshe bokukhiqiza.
Izici zenqubo:
Lobu buchwepheshe benqubo abunayo nje kuphela izinzuzo zezinqubo ezivamile ze-powder metallurgy ezifana nezinyathelo ezimbalwa, ukusika noma ukusika okuncane, kanye nezinzuzo eziphezulu zezomnotho, kodwa futhi kunqoba ukushiyeka kwendabuko.imikhiqizo ye-powder metallurgynjengezinto ezingalingani, izakhiwo eziphansi zemishini, nobunzima bokwenza izindonga ezincane nezakhiwo eziyinkimbinkimbi. Ifaneleka ngokukhethekile ukukhiqizwa ngobuningi bezingxenye zensimbi ezincane, eziyinkimbinkimbi nezikhethekile. Ukugeleza kwenqubo: isibopho → ukuxuba → ukubumba umjovo → ukukhulula amafutha → ukucwilisa → ukucutshungulwa kwangemuva.
I-powder metal powder:
Usayizi wezinhlayiyana ze-metal powder ezisetshenziswa ku-Inqubo ye-MIMngokuvamile 0.5 ~ 20μm; ngokwethiyori, uma izinhlayiya zicoleka, indawo ethile engaphezulu iba nkulu, okwenza kube lula ukubunjwa kanye ne-sinter. Inqubo ye-powder metallurgy yendabuko isebenzisa izimpushana ezimahhadla ezinkulu kuno-40μm.
Ekubumbeni umjovo we-MIM we-themetal, i-binder idlala indima ebaluleke kakhulu, ithinta ngokuqondile ukuxuba, ukubumba umjovo, ukukhishwa kwe-degreasing nezinye izinqubo, futhi kunomthelela omkhulu kukhwalithi, ukuchithwa nokunemba kobukhulu bokubumba komjovo we-metal powder kungenalutho, ukwakheka kwe-alloy, njll. Indima yayo ukuhlanganisa izinhlayiya zensimbi ze-powder nge-herreated ezingxenyeni zomjovo we-herreological wezinto ezibonakalayo zibe umjovo we-herreological umshini, okungukuthi, uba umthwali ukushayela ukugeleza powder. Ngakho-ke, ukukhetha kwe-binder kuyisihluthulelo sokwakheka komjovo wempushana wonke. Izimfuneko ze-binder:
- inani elincane, okungukuthi, ukuqinisekisa ukuthi ingxube ine-rheology engcono ngenkathi usebenzisa i-binder encane ngangokunokwenzeka;
- Akukho ukusabela, okungukuthi akukho ukusabela kwamakhemikhali ngempushana yensimbi;
- Kulula ukususa, akukho zinsalela emkhiqizweni.
Umphefumulo we-binder powder metallurgy inqubo ye-MIM, ukungezwa nokususwa kwayo ubuchwepheshe obuyinhloko be-MIM, futhi inqubo yokwehlisa amafutha esetshenziswa ohlelweni lokuhlanganisa iyisihloko socwaningo esibalulekile ekhaya naphesheya. Izibophezelo ezisetshenziswa ku-MIM zihlanganisa amasistimu we-thermoplastic, amasistimu we-thermoset, amasistimu ancibilikayo emanzini, amasistimu ejeli kanye nezinhlelo ezikhethekile, ngayinye enezinzuzo zayo kanye nokubi. I-Thermoplastic binder system yiyona ehamba phambili kanye nesandulela se-MIM binder, futhi abantu bagxila ekuthuthukiseni izakhiwo ze-rheological zokudla okusanhlamvu, ucwaningo oluningi luye lwenziwa ukunciphisa ukuwohloka kokuwohloka nokunciphisa isikhathi sokukhipha amafutha, futhi amanye ama-agent akhethekile ahlanganisa ama-polyacetal binder asethuthukisiwe. Kodwa ucwaningo nokuthuthukiswa kwama-binders akusho lutho ngezimpushana
Ukuhlangana, ukuxuba izimpushana nezibophezelo, izakhiwo ze-rheological kanye ne-thermodynamic zezibophezelo kanye nokudla ngaphansi kwezimo ezihlukahlukene,Ithonya lezibophezelo ekunciphiseni amafutha kanye nezakhiwo zomkhiqizo inikeza izimiso zendawo yonke kanye nesisekelo sethiyori sokukhethwa kwama-binder, ngokungangabazeki okuyingqayizivele Inencazelo enhle kakhulu. Ukuthuthukiswa kohlelo olusha nolusebenzayo lokuhlanganisa nakho kugxilwe kuyoUbuchwepheshe be-MIM.
Isikhathi sokuthumela: Jun-23-2022