Ntchito refractory zitsulo

Refractory zitsulo ndi mtundu wa zida zachitsulo zomwe zimalimbana bwino ndi kutentha komanso malo osungunuka kwambiri.

Zinthu zotsutsa izi, komanso mitundu yosiyanasiyana yamagulu ndi ma aloyi opangidwa ndi iwo, ali ndi mikhalidwe yambiri yofananira. Kuphatikiza pa malo osungunuka kwambiri, amakhalanso ndi kukana kwa dzimbiri, kachulukidwe kakang'ono, ndipo amakhalabe ndi mphamvu zamakina pakatentha kwambiri. Makhalidwewa amatanthauza kuti zitsulo zosakanizika zimatha kugwiritsidwa ntchito m'magawo ambiri, monga ma elekitirodi osungunuka a magalasi, mbali za ng'anjo, zopangira sputtering, ma radiator ndi ma crucibles. Akatswiri ochokera ku Dipatimenti ya Zamakono ya RSM adayambitsa zitsulo ziwiri zomwe zimagwiritsidwa ntchito kwambiri, zomwe ndi molybdenum ndi niobium.

molybdenum

Ndilo chitsulo chogwiritsidwa ntchito kwambiri chomwe chimagwiritsidwa ntchito kwambiri ndipo chimakhala ndi makina abwino kwambiri otenthetsera kutentha, kutsika kwamafuta ochepa komanso kutsika kwamafuta kwambiri.

Zinthu izi zikutanthauza kuti molybdenum itha kugwiritsidwa ntchito kupanga zida zolimba zotenthetsera kwambiri, monga zonyamula, ma brake pads, zida za ng'anjo, ndi zida zamoto. Molybdenum amagwiritsidwa ntchito mu ma radiator chifukwa cha kutentha kwake kwapamwamba (138 W/(m · K)).

Kuwonjezera pa makina ake ndi matenthedwe katundu, molybdenum (2 × 107S/m), amene amapanga molybdenum ntchito magalasi kusungunuka electrode.

Molybdenum kawirikawiri aloyed ndi zitsulo zosiyanasiyana ntchito amafuna mphamvu matenthedwe, chifukwa molybdenum akadali ndi mphamvu mkulu ngakhale pa kutentha. TZM ndi aloyi wodziwika bwino wa molybdenum base, wokhala ndi 0.08% zirconium ndi 0.5% titaniyamu. Mphamvu ya alloy iyi pa 1100 ° C ndi pafupifupi kawiri ya molybdenum yosasinthika, yomwe imakhala ndi kuwonjezereka kwapakati komanso kutentha kwapamwamba.

niobium

Niobium, chitsulo chosakanizika, chimakhala ndi ductility kwambiri. Niobium imakhala ndi mphamvu zambiri ngakhale pa kutentha kochepa, ndipo imakhala ndi mitundu yambiri, monga zojambulazo, mbale ndi pepala.

Monga chitsulo chosakanizika, niobium imakhala ndi kachulukidwe kakang'ono, zomwe zikutanthauza kuti ma aloyi a niobium angagwiritsidwe ntchito popanga zida zowoneka bwino zokhala ndi zolemera zopepuka. Chifukwa chake, ma alloys a niobium monga C-103 nthawi zambiri amagwiritsidwa ntchito mu injini za rocket zamlengalenga.

C-103 ili ndi mphamvu yabwino kwambiri yotentha kwambiri ndipo imatha kupirira kutentha mpaka 1482 ° C. Imakhalanso yopangidwa bwino kwambiri, kumene ndondomeko ya TIG (Tungsten Inert Gas) ingagwiritsidwe ntchito powotcherera popanda kukhudza kwambiri machinability kapena ductility.

Kuonjezera apo, poyerekeza ndi zitsulo zosiyana refractory, ali m'munsi matenthedwe nyutroni mtanda gawo, kusonyeza kuthekera mu m'badwo wotsatira wa ntchito nyukiliya.