Waya wotentha wa molybdenum wooneka ngati U
Kusankhidwa kwa waya wabwino kwambiri wa chinthu chotenthetsera kumatengera zofunikira zomwe zimagwiritsidwa ntchito. Komabe, zida zina zomwe zimagwiritsidwa ntchito potenthetsera zinthu ndizo:
1. Nickel-chromium alloy: Nickel-chromium alloy amagwiritsidwa ntchito kwambiri potenthetsera zinthu chifukwa champhamvu kwambiri, kukana bwino kwa okosijeni, komanso kutentha kwambiri. Amagwiritsidwa ntchito kwambiri pazida zapakhomo monga toasters, zowumitsa tsitsi, ndi uvuni.
2. Kanthal: Kanthal ndi chitsulo-chromium-aluminium alloy chomwe chimadziwika chifukwa cha mphamvu zake zotentha kwambiri, kukana kwa okosijeni wabwino, komanso moyo wautali wautumiki. Amagwiritsidwa ntchito kwambiri popangira zotenthetsera zamafakitale monga ng'anjo, ng'anjo ndi uvuni zamakampani.
3. Tungsten: Imadziwika ndi malo ake osungunuka kwambiri, tungsten amagwiritsidwa ntchito popanga zinthu zomwe zimafuna kutentha kwambiri, monga ng'anjo zotentha kwambiri komanso njira zapadera zamafakitale.
4. Molybdenum: Molybdenum ndi chinthu china chomwe chimakhala ndi malo osungunuka kwambiri komanso kukana bwino kwa dzimbiri ndi okosijeni, zomwe zimapangitsa kuti zikhale zoyenera kutenthetsa kutentha kwapadera mu ntchito zapadera.
Waya wabwino kwambiri wazotenthetsera zimatengera zinthu monga kutentha komwe mukufuna, malo omwe zidzagwiritsidwe ntchito, komanso zofunikira zotenthetsera zomwe zimagwiritsidwa ntchito. Chilichonse chili ndi zabwino zake komanso zofooka zake, kotero kusankha kuyenera kutengera zosowa za chinthu chotenthetsera chomwe chimagwiritsidwa ntchito.
Molybdenum amaonedwa kuti ndi woyendetsa bwino kutentha, ngakhale kuti satenthetsa bwino monga zitsulo zina monga mkuwa kapena aluminiyamu. Thermal conductivity ya molybdenum pa kutentha kwa chipinda ndi pafupifupi 138 W/m·K, yomwe ili yotsika kuposa mkuwa (pafupifupi 401 W/m·K) ndi aluminiyamu (pafupifupi 237 W/m·K).
Komabe, matenthedwe a molybdenum akadali okwera kwambiri poyerekeza ndi zida zina zambiri, makamaka pakutentha kwambiri. Izi zimapangitsa molybdenum kukhala chisankho choyenera kwa mapulogalamu omwe amafunikira kutentha kwapamwamba kwambiri, monga zinthu zotentha, ng'anjo zotentha kwambiri ndi machitidwe ena oyendetsera kutentha.
Kuphatikiza pa kutentha kwa kutentha, molybdenum ili ndi zinthu zina zamtengo wapatali monga malo osungunuka kwambiri, kukana makutidwe ndi okosijeni, ndi mphamvu zamakina abwino pa kutentha kwakukulu, zomwe zimapangitsa kuti zikhale zogwiritsidwa ntchito zosiyanasiyana zogwiritsira ntchito kutentha kwakukulu.
Molybdenum nthawi zambiri amathandizidwa ndi kutentha kuti apititse patsogolo mawonekedwe ake ndikuchepetsa kupsinjika kwamkati. Njira yochizira kutentha kwa molybdenum nthawi zambiri imakhala ndi annealing, kutenthetsa koyendetsedwa ndi kuziziritsa. Njira zochizira kutentha kwa molybdenum zingaphatikizepo:
1. Annealing: Molybdenum imatsekeredwa pa kutentha kwambiri, nthawi zambiri m'kati mwa madigiri 1,800 mpaka 2,200 Celsius (3,272 mpaka 3,992 madigiri Seshasi). Zomwe zimachitikira pa kutentha uku kwa nthawi yeniyeni kuti zilolere kukonzanso ndi kukula kwa tirigu, zomwe zimathandiza kuthetsa nkhawa zamkati ndikuwongolera ductility.
2. Kuziziritsa koyendetsedwa: Pambuyo pa ndondomeko ya annealing, molybdenum imakhazikika pang'onopang'ono mpaka kutentha kwa chipinda m'njira yoyendetsedwa kuti zisapangidwe zamkati mwatsopano komanso kusunga microstructure yomwe ikufunidwa.
Zomwe zimagwiritsidwa ntchito pochiza kutentha, kuphatikizapo kutentha, nthawi ndi kuzizira, zimatsimikiziridwa malinga ndi zofunikira zamakina ndi zofunikira zogwiritsira ntchito.
Ponseponse, chithandizo cha kutentha kwa molybdenum chimafuna kukhathamiritsa ma microstructure ndi makina ake kuti zitsimikizire kuti ndizoyenera kugwiritsa ntchito kutentha kwakukulu monga kupanga zinthu zotentha, zida za ng'anjo ndi zida zina zapadera zamafakitale.
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