ubushushu obuphezulu be-tungsten ingxube yengxubevange yembiza yokunyibilika ekrolwe kwilabhoratri
Ukushisa okuphezulu kwe-tungsten crucible kuxhomekeke kwizinto ezithile ze-tungsten alloy kunye nenkqubo yokuvelisa. Ngokubanzi, ii-tungsten crucibles ziyakwazi ukumelana namaqondo obushushu angaphezu kwe-3000 ° C (5432 ° F), nto leyo ezenza zilungele ukusetyenzwa kwemathiriyeli ezifuna amaqondo obushushu aphezulu kakhulu, njengokunyibilika kunye nokujulwa kwesinyithi, iiseramikhi, kunye nobunye ubushushu obuphezulu. izixhobo. Nangona kunjalo, ukubunjwa kwe-alloy ethile kunye nokusebenzisana okunokwenzeka kunye nezinto ezicutshungulwayo kufuneka ziqwalaselwe ukuqinisekisa ukusebenza kwe-crucible phezu komgangatho wokushisa okulindelekileyo.
Ewe, i-tungsten crucibles ingasetyenziswa ngeentsimbi ezahlukeneyo, kodwa kubalulekile ukuqwalasela ukuhambelana kwezinto ezixutywayo kunye nentsimbi ethile ecutshungulwayo. I-Tungsten crucibles ivame ukukhethwa ngenxa yokuchasana nokushisa okuphezulu kunye nokubola kweekhemikhali, okwenza ukuba zifaneleke kwiindidi ezahlukeneyo zokunyibilika kwesinyithi kunye nokucubungula izicelo. Nangona kunjalo, iintsimbi ezithile okanye i-alloys zetsimbi zinokuba nokusebenzisana okuthe ngqo kunye ne-crucible material, njengokuphendula okunokwenzeka okanye ukungcola, okunokuchaphazela umgangatho wezinto ezicutshungulwayo. Ngoko ke, izinto ezifakwe kwi-crucible kufuneka zihlolwe ukuhambelana nezinyithi ezithile kunye ne-alloys ezisetyenziselwa ukuqinisekisa ukunyaniseka kwemisebenzi yokunyibilika kunye nokucubungula. Ukongezelela, ukucocwa okufanelekileyo kunye nokugcinwa kwee-crucibles phakathi kwee-metalworking runs ezahlukeneyo kubalulekile ukuphepha ukungcola kunye nokuqinisekisa ukusebenza okuhambelanayo.
Iindawo ezinyibilikayo eziphezulu zibandakanya:
1. I-alloy esekelwe kwi-Tungsten: I-Tungsten ineyona ndawo iphakamileyo yokunyibilika phakathi kwazo zonke iintsimbi, kunye ne-alloys zayo ezifana ne-tungsten-rhenium, i-tungsten-molybdenum, njl.
2. I-alloys esekelwe kwi-Molybdenum: I-Molybdenum kunye ne-alloys yayo, njenge-molybdenum titanium zirconium (TZM) kunye ne-molybdenum lanthanum oxide (ML), zineendawo eziphezulu zokunyibilika kwaye zisetyenziselwa ukusetyenziswa kweqondo lokushisa eliphezulu.
3. I-alloys yensimbi ephikisayo: I-alloys equkethe i-metals refractory efana ne-niobium, i-tantalum, kunye ne-rhenium ziyaziwa ngeendawo eziphezulu zokunyibilika kwazo kwaye zisetyenziselwa kwiindawo eziphezulu zokushisa.
Ezi alloys ziqhele ukusetyenziswa kwi-aerospace, ukukhusela kunye nokushisa okuphezulu kwezicelo zemizi-mveliso ezifuna izinto ezinokumelana nokushisa okukhulu.
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