Kev siv cov hlau refractory

Refractory hlau yog ib yam khoom siv hlau uas muaj cua sov zoo heev thiab cov ntsiab lus melting siab heev.

Cov ntsiab lus refractory no, nrog rau ntau yam kev sib txuas thiab cov alloys tsim los ntawm lawv, muaj ntau yam zoo sib xws. Ntxiv nrog rau qhov siab melting point, lawv kuj muaj kev tiv thaiv corrosion siab, siab ceev, thiab tswj tau zoo heev mechanical zog ntawm qhov kub thiab txias. Cov yam ntxwv no txhais tau hais tias cov hlau refractory tuaj yeem siv tau rau ntau qhov chaw, xws li iav melting electrodes, qhov cub tawg, sputtering lub hom phiaj, radiators thiab crucibles. Cov kws tshaj lij los ntawm Lub Tsev Haujlwm Technology ntawm RSM tau qhia txog ob feem ntau siv cov hlau refractory thiab lawv cov ntawv thov, uas yog, molybdenum thiab niobium.

molybdenum

Nws yog feem ntau siv refractory hlau thiab muaj cov cuab yeej zoo heev nyob rau hauv qhov kub thiab txias, tsis tshua muaj thermal expansion thiab siab thermal conductivity.

Cov khoom no txhais tau hais tias molybdenum tuaj yeem siv los tsim qhov chaw ruaj khov rau kev siv hluav taws xob siab, xws li cov kabmob, lub tshuab nqa nqa, lub qhov cub tawg, thiab forging tuag. Molybdenum yog siv nyob rau hauv radiators vim nws cov thermal conductivity (138 W / (m · K)).

Ntxiv rau nws cov khoom siv tshuab thiab thermal, molybdenum (2 × 107S / m), uas ua rau molybdenum siv los ua iav melting electrode.

Molybdenum feem ntau yog alloyed nrog cov hlau sib txawv rau cov ntawv thov uas xav tau thermal zog, vim tias molybdenum tseem muaj lub zog siab txawm tias qhov kub thiab txias. TZM yog lub npe nrov molybdenum puag alloy, muaj 0.08% zirconium thiab 0.5% titanium. Lub zog ntawm cov hlau no ntawm 1100 ° C yog kwv yees li ob zaug ntawm qhov tsis muaj molybdenum, uas tsis tshua muaj thermal expansion thiab siab thermal conductivity.

niobium

Niobium, hlau refractory, muaj ductility siab. Niobium muaj kev ua haujlwm siab txawm tias qhov kub thiab txias, thiab muaj ntau hom ntawv, xws li ntawv ci, phaj thiab ntawv.

Raws li cov hlau refractory, niobium muaj qhov ntom ntom, uas txhais tau hais tias niobium alloys tuaj yeem siv los tsim cov khoom siv refractory uas muaj qhov hnyav hnyav. Yog li ntawd, niobium alloys xws li C-103 feem ntau yog siv hauv aerospace foob pob hluav taws cav.

C-103 muaj lub zog kub zoo heev thiab tuaj yeem tiv taus qhov kub thiab txias mus txog 1482 ° C. Nws kuj tseem tsim tau zoo heev, qhov twg cov txheej txheem TIG (Tungsten Inert Gas) tuaj yeem siv los txuas rau nws yam tsis muaj kev cuam tshuam rau machinability lossis ductility.

Tsis tas li ntawd, piv nrog cov hlau refractory sib txawv, nws muaj qis dua thermal neutron hla ntu, qhia txog lub peev xwm nyob rau tiam tom ntej ntawm kev siv nuclear.