Umthelela wesengezo esishintshwe impushana kunqubo yokukhiqiza ye-NdFeb engenalutho.
Ukuze kukhiqizwe ukusebenza okuphezulu kwe-sintered NdFebuzibuthe unomphelaimpahla, kufanele silawule usayizi wokugeleza komoya ukugaya izinhlayiya zempushana kazibuthe, ukuze ubukhulu bezinhlayiya zempushana kazibuthe ku-2.5~5μm zibalwe ngaphezu kuka-95%.I-Xinfeng Magnet ithole ukuthi inqubo ingathuthukiswa kakhulu ngokwengeza izithasiselo ezikhethekile zokuguqulwa kwempushana kunqubo yokugaya ukugeleza komoya.
Izithasiselo eziguquliwe zempushana kufanele zibe nomsebenzi oyinhlanganisela, okungukuthi:(1) umsebenzi wokulwa nokuguquguquka;(2) Thuthukisa umsebenzi we-powder fluidity;(3) Vimbela ukusha kwempushana, okungukuthi umsebenzi wokubuyisela emuva ovuthayo.Inani lesengezo licishe libe ngu-0.035%~0.05% (ingxenyana yobuningi) yempushana kazibuthe, evamise ukungezwa ngesikhathi esifanayo nempushana kazibuthe endaweni yokudla yokugaya komoya.
I-Additive iyinhlanganisela yezinto eziphilayo enezingxenye eziningi, ezinamaqembu e-lipophilic, okungukuthi amaketanga e-hydrocarbon, aqukethe amaqembu amancane amhlophe, njengamaqembu e-lipid, ukuze iketango le-hydrocarbon libe nobude obufanele beketanga.Izinhlayiya zempushana kazibuthe zishayisana ngokuphindaphindiwe futhi zithintane nezithasiselo enqubweni yokugaya ukugeleza komoya, ukuze ingaphezulu lezinhlayiyana ngalinye limbozwe ungqimba lwefilimu yokwengeza enogqinsi olungaba ngu-5~8nm.Idlala izindima ezilandelayo: (1) Vimbela izinhlayiya zempushana ukuthi zingathintani nomoya, dlala indima yokulwa ne-oxidation;(2) Yenza buthaka umphumela we-magnetostatic phakathi kwezinhlayiya zempushana, unciphise i-agglomeration phakathi kwezinhlayiya zempushana, udlale indima ye-dispersant;(3) Khulisa uketshezi nokuhamba kwezinhlayiya zempushana futhi udlale indima yokuthambisa;(4) Kuyazuzisa ukuma kwezinhlayiya zempushana endaweni kazibuthe, okungathuthukisa ukuma kwayo;I-BR inganyuswa ngo-0.02-0.04 T, futhi umkhiqizo wamandla kazibuthe (BH) m ungandiswa ngokufanayo.Kumele kuqashelwe ukuthi izinga lokushisa eliguquguqukayo lalesi sengezo lingu-350 ℃.Izinga lokushisa le-Sintering lidinga ukubanjwa ku-400-420 ℃ isikhathi esithile, ukuze izithasiselo zikhishwe kumagnet, ukuze zingangcwatshwa.
Izimo ezidingekayo zokukhiqiza izinga eliphezulu sintered NdFeb uzibuthe unomphela.
Ukuze uthole ukuma okuhle kwamazibuthe, uzibuthe we-Xinfeng wafinyelela esiphethweni ngemva kweminyaka yokuhlolwa kanye nempendulo edidiyelwe ekusetshenzisweni kwamakhasimende emakethe ukuthi kuyadingeka ukwenza i-sintered NdFeb powder powder ukuhlangabezana nezidingo ezilandelayo ukuze imikhiqizo ephezulu ingakwazi. kudalwe, futhi izinto zokwelapha kuphela ezinhle, umuthi uzoba ngcono.(1) Usayizi wezinhlayiya zempushana mncane (3~4μm), futhi ukusabalalisa usayizi kuncane, okungukuthi, izidingo zezinhlayiya ezingu-3~4μm ezibalelwa ku-95%, azinayo izinhlayiya ezingaphansi kuka-1μm noma ezingaphezu kuka-7μm, ukuze qinisekisa ukuthi zonke izinhlayiya ziyikristalu eyodwa.(2) Izinhlayiya zempushana ziyindilinga noma cishe ziyindilinga.(3) Ukukhubazeka kwekristalu yezinhlayiya zempushana kufanele kube kuncane ngangokunokwenzeka.(4) Lapho uchoboza, kungcono ukuhlephula eduze kwesiteji sekristalu, futhi ulwele ukufeza ingaphezulu lezinhlayiyana ngayinye inesigaba se-Rich Nd, esibeka isisekelo sesigaba soketshezi sintering ngemuva futhi sivimbele ukuvela komngcele wesigaba ⅱ wokusanhlamvu.(5) Ukungcola namagesi akhangisiwe ebusweni bezinhlayiya zempushana kufanele kube kuncane ngangokunokwenzeka, ikakhulukazi okuqukethwe komoyampilo kufanele kube kuncane.Ngakho-ke, inqubo yokulungiselela i-powder kufanele yenziwe ngokuhlanzeka okuphezulu kokuvikelwa kwegesi ye-inert noma izimo ze-vacuum, ukuze kuvinjelwe ukuxhumana kwe-powder magnetic ne-oxygen noma umoya omswakama.Lezi zimo ezinhlanu ezingenhla ziyadingeka ukuze kukhiqizwe omazibuthe bekhwalithi ephezulu ye-sintered NdFeb, ukungabi nalutho ngakunye akufiseleki, kubukeka sengathi kulula, empeleni ngamunye angakwenza okuphelele akulula, omazibuthe be-Xinfeng bazimisele ukusebenza ndawonye nabantu abavela kuzo zonke izizinda zokuphila ukuze yenza imikhiqizo ephelele kakhulu, futhi ulwele ukuhlinzeka amakhasimende ngamasevisi ekhwalithi eyengeziwe.
Ukuphumelela okusha kwe-Xinfeng Magnet ekuthuthukiseni ukuphoqelelwa kukazibuthe we-Sintered NdFeb.
Ukuphoqeleka kungenye yemingcele ebalulekile yezobuchwepheshe yamagnetic unomphela.Ukwandisa amandla kazibuthe kungakhuphula umkhiqizo wamandla kazibuthe omkhulu, kuthuthukise ukumelana nokukhishwa kazibuthe kukazibuthe osetshenziswayo osebenzayo, futhi kuthuthukise ukuzinza kwawo.Njengamanje, ekulungiseni omazibuthe abahlanzekile be-ternary sintered NdFeb unomphela, izakhiwo kazibuthe zobuchwepheshe kanye namanani wethiyori, kanye ne-BR remanence isivele ifinyelele ku-96.27% yenani layo lethiyori, futhi umkhiqizo omkhulu wamandla kazibuthe u-BH usufinyelele ku-91.5% wethiyori yawo. inani.Nokho, amandla okuphoqelela afinyelele kuphela ku-12% yenani layo lethiyori.Inamandla amakhulu okuthuthukisa amandla ayo okuphoqa, kusenokwanda okukhulu kwesikhala.I-Xinfeng magnet ibisebenza kanzima kulokhu.
Okokuqala, ukuphoqwa kukazibuthe kungathuthukiswa ngempumelelo ngokufaka esikhundleni se-Nd nge-Dy ne-Tb eyingxenye.Nokho, ezinsizeni zensimbi zomhlaba ezingavamile, i-Dy ne-Tb iphansi ngokuqukethwe futhi iyabiza, futhi i-Dy ne-Tb zinganezelwa kuphela ngamanani okulandela umkhondo.Okwesibili, ukungezwa kwezinye izakhi zensimbi ezifana ne-AL, Nb, Ga, Ti, Zr, Mo, njll., lapho lezi zakhi zingena ku-crystal, i-microstructure nokusebenza kwenqubo ngokusobala kuyathuthukiswa, futhi kwandise ukucindezelwa kukazibuthe.Okwesithathu, ukuphoqelela kazibuthe kungathuthukiswa ngokuphumelelayo ngokungeza izakhi nokusebenzisa ukushisa okuphansi kwe-sintering noma indlela ye-alloy ephindwe kabili ukuze kuncishiswe usayizi we-crystal ojwayelekile.
Okulandelayo, uzibuthe we-Xinfeng uzoqhubeka nokusebenza kanzima ukuze uthuthukise umkhiqizo omkhulu wamandla kazibuthe we-NdFeb e-sintered, futhi uhlale uhlinzeka ngemikhiqizo engcono kumakhasimende.
Isikhathi sokuthumela: Jul-12-2018