Imikhiqizo Ye-Cemented Carbide Ukulungiswa Kwe-Tungsten Powder

I-tungsten powder yezinhlayiyana ecwebe kakhulu imnyama, iyizinhlayiyana ezinhlei-tungstenimpushana inompunga okumnyama, futhi i-tungsten particle emahhadla powder inompunga okhanyayo kanye nokucwebezela kwensimbi.I-metal tungsten powder ingakhiqizwa ngokunciphisa i-tungsten oxide.Izindlela eziyinhloko zokunciphisa ukunciphisa i-hydrogen nokunciphisa i-carbon.Njengamanje, indlela yokunciphisa i-hydrogen ivame ukusetshenziswa.Ukuhlobana kwe-hydrogen nomoya-mpilo emazingeni okushisa aphezulu kukhulu kunokuhlobana kwe-tungsten nomoya-mpilo.Ngakho-ke, i-tungsten trioxide iqala ukuncishiswa nge-hydrogen ku-380 ~ 400°C.I-hydrogen inganciphisa i-tungsten dioxide ibei-tungsten powderngaphezu kuka-630°C.

.Ii-tungsten powderekhiqizwa indlela yokunciphisa i-hydrogen inokuhlanzeka okuphezulu futhi kulula ukulawula usayizi wezinhlayiyana zempushana.Uma ingekho i-hydrogen, indlela yokunciphisa i-carbon nayo iyatholakala.Inzuzo yotshani obomile ukuthi i-carbon black ishibhile futhi kulula ukuyithola, kodwa ubukhulu bezinhlayiyana zempushana kunzima ukulawula.Kukhona indlela yokunciphisa yesikhathi esisodwa yokunciphisa i-tungsten oxide nge-hydrogen ukuze kulungiswe i-tungsten powder, futhi kukhona indlela yokunciphisa izigaba eziningi eqala ukunciphisa i-WO3 ku-WO2, bese inciphisa i-oxalic acid kuqala ukwenza i-w powder.Enqubweni yokukhiqiza yamanje, i-tungsten powder ivame ukukhiqizwa ngendlela yokunciphisa okuqondile kwesiteji esisodwa.

Ngaphezu kwalokho, kukhona futhi indlela yokunciphisa ngokuqondile i-ammonium paratungstate ibe yi-tungsten powder.Enye i-tungsten enenhloso ekhethekile nayo ilungiswa ngendlela yokunciphisa i-halide.
Kukhona futhi indlela ye-aluminothermic yokunciphisa i-ore powder nokuyilungisa.Kusukela ngo-2000, inqubo yokulungiselela i-ultrafine tungsten powder ngokunciphisa i-hydrogen ye-violet tungsten iye yakhuthazwa kabanzi.