Isici esibalulekile sokusebenza kahle kwesithando sokushisa i-vacuum esinomoya opholile ukusetshenziswa kwegesi namandla enqubo ngokomnotho. Ngokwezinhlobo ezahlukene zegesi, lezi zinto ezimbili zezindleko zenqubo yokushisa i-vacuum zingabalelwa ku-50% wezindleko eziphelele. Ukuze kongiwe ukusetshenziswa kwegesi, imodi yokucindezela okuyingxenye yokugeleza kwegesi elungisekayo kumele isetshenziswe ukuqinisekisa ukuthi izinqubo zokususa amafutha kanye nokushisisa azinawo ukungcola. Ukuze kuncishiswe ukusetshenziswa kwamandla, izinto zokushisa ezilungiselelwe zisetshenziselwa ukukhiqiza izindawo ezishisayo ukunciphisa ukulahleka kokushisa. Ukuze kufezwe la maphuzu okuklama futhi kulawulwe izindleko ze-R & D ngaphakathi kobubanzi obufanele, isithando sokushisa se-vacuum sanamuhla esonga izinsiza sizosebenzisa amathuluzi okubala e-hydrodynamic ukuthola imodi yokugeleza komoya efanele kanye nemodi yokugeleza kokushisa.
Ukusetshenziswa kwezinhlobo ezahlukene zesithando somlilo
Kungakhathaliseki uhlelo oluhlelwe ngokwezifiso nolukhethekile kakhulu, izithando eziningi ezishisayo emakethe zingahlukaniswa zibe yi-vacuum furnace ephindaphindayo kanye ne-continuous atmosphere furnace. Izingxenye ezinsundu ngemva kokubumba nge-injection kanye ne-catalytic/degreasing ziqukethe i-residual polymer. Zombili izinhlobo zesithando zinikeza uhlelo lokususa i-polymer ngokushisa.
Ngakolunye uhlangothi, kufaneleka kakhulu ukusebenzisa ngokugcwele isithando somoya esiqhubekayo uma siyingxenye enkulu kakhulu enokukhiqiza ngobuningi okuhambisanayo noma isimo esifanayo. Kulokhu, ngomjikelezo omfushane kanye nomthamo ophezulu wokusila, izinga lezindleko nezinzuzo elihle lingatholakala. Kodwa-ke, emigqeni yokukhiqiza emincane nephakathi nendawo, lesi sithando somoya esiqhubekayo esinomkhiqizo omncane wonyaka ongu-150-200t, izindleko zokufaka eziphezulu kanye nomthamo omkhulu asikho eqolo. Ngaphezu kwalokho, isithando somoya esiqhubekayo sidinga isikhathi eside sokuvala ekunakekelweni, okunciphisa ukuguquguquka kokukhiqiza.
Ngakolunye uhlangothi, isithando somlilo esisebenza ngezikhathi ezithile esisebenza nge-vacuum sintering sinobuchwepheshe obuhle kakhulu bokulawula inqubo yokususa amafutha. Imikhawulo okukhulunywe ngayo ngaphambili, okuhlanganisa ukuguqulwa kwejometri kanye nokubola kwamakhemikhali kwezingxenye ze-MIM, ingaxazululwa ngempumelelo. Isixazululo esisodwa ukuhlanza izinto ezibophayo ngegesi yenqubo ye-laminar ngokusebenzisa uhlelo oluqondile lokulawula igesi. Ngaphezu kwalokho, ngokunciphisa umthamo wendawo eshisayo, ukufana kwezinga lokushisa lesithando somlilo esisebenza nge-vacuum kuhle kakhulu, kuze kufike ku-LK. Ngokuvamile, isithando somlilo esisebenza nge-vacuum sinokuhlanzeka okuhle komoya, amapharamitha enqubo alungisekayo esithando somlilo esisebenza nge-vacuum sintering esiphezulu kanye nokudlidliza kwengxenye encane, okwenza kube ukukhetha kobuchwepheshe ekukhiqizeni izingxenye ezisezingeni eliphezulu (njengamadivayisi ezokwelapha). Izinkampani eziningi zibhekene nama-oda ashintshashintshayo futhi zidinga ukukhiqiza izingxenye ezinezimo nezinto ezahlukene. Ukufakwa okuphansi kanye nokuguquguquka komjikelezo ophezulu wesithando somlilo esisebenza nge-vacuum sintering kuzodala izimo ezinhle kuzo. Ukuqhuba iqembu lezithando zomlilo ezisebenza nge-vacuum akukwazi nje ukuhlinzeka ngemigqa yokukhiqiza eyengeziwe, kodwa futhi kuqhuba nezinqubo zenqubo ezahlukene ngesikhathi esisodwa.
Kodwa-ke, ezinye izitofu zokushisa i-vacuum ezingochwepheshe ezinezinzuzo zobuchwepheshe ezingenhla zinqunyelwe amandla amancane atholakalayo. Ukungalungi kwazo ngesilinganiso sokufaka-ukuphuma kanye nokusetshenziswa kwamandla aphansi kwenza izindleko zokushisa izingxenye zilingane nezindleko ezilondolozwe kwezinye izinhlelo ze-MIM.
Isikhathi sokuthunyelwe: Meyi-07-2022