Tungsten molybdenum crucible W crucible Mo Crucible
Khoom nthuav qhia
Raws li ib tug nonferrous hlau, tungsten muaj ib tug heev lub zog thiab hardness.Vim qhov no 2.Main Nta, tungsten carbide nrog siab hardness thiab muaj zog hnav tsis kam tau siv rau hauv cov cuab yeej txiav thiab cov cuab yeej mining ntawm cov nplai loj.
Tungsten yog cov hlau refractory nrog lub siab tshaj plaws melting point.Cov hlau dav dav uas muaj cov ntsiab lus melting siab tshaj 1650 ℃ thiab qee qhov tshwj xeeb thiab cov ntsiab lus melting siab tshaj qhov melting point ntawm zirconium (1852 ℃) hu ua refractory hlau.Cov hlau refractory yog tungsten, tantalum, molybdenum, niobium, hafnium, chromium, vanadium, zirconium, thiab titanium.Raws li cov hlau refractory, qhov tseem ceeb tshaj plaws ntawm tungsten yog tias nws muaj qhov kub thiab txias zog thiab zoo corrosion kuj rau molten alkali hlau thiab vapor.Nws tsuas tshwm sim saum 1000 ℃.Molybdenum thiab tungsten muaj cov khoom zoo sib xws, cov ntsiab lus kub kub thiab hluav taws xob conductivity, me me linear thermal expansion coefficient, thiab yooj yim rau txheej txheem dua li tungsten.
Lub thermal conductivity ntawm molybdenum hlau [135 watts / (m · qhib)] ua haujlwm zoo tshaj plaws nrog cov cua sov tshwj xeeb [0.276 kJ / (kg · qhib)], ua rau nws xaiv ntuj tiv thaiv thermal shock thiab thermal qaug zog.Nws cov ntsiab lus melting yog 2620 ℃, qhov thib ob rau tungsten thiab tantalum, tab sis nws qhov ceev yog qis dua, yog li nws lub zog tshwj xeeb (lub zog / ntom) yog ntau dua tungsten, tantalum thiab lwm yam hlau, uas yog qhov zoo dua rau kev siv nrog qhov hnyav hnyav.Molybdenum tseem muaj kev siv siab ntawm 1,200 ℃.
Lub ntsiab nta
Tungsten muaj lub siab melting point, lub siab tsis tshua muaj vapor siab, thiab tus nqi evaporation me me.Cov khoom siv tshuaj lom neeg ntawm tungsten yog qhov ruaj khov heev, tsis muaj qhov cuam tshuam nrog huab cua thiab dej hauv chav sov, insoluble hauv hydrochloric acid, sulfuric acid, nitric acid thiab alkali daws.Dissolve nyob rau hauv cov dej muaj koob muaj npe thiab sib tov ntawm nitric acid thiab hydrofluoric acid.Thaum kub kub, nws tuaj yeem ua ke nrog chlorine, bromine, iodine, carbon, nitrogen, sulfur, tab sis tsis yog nrog hydrogenation.Qhov ntshiab tungsten melting point ncav cuag 3410 ℃, uas tseem muaj zog siab ntawm txog 1300 ℃, thaum lub tungsten-raws li alloy kuj muaj lub zog siab ntawm txog 1800 ℃ thiab muaj kev tiv thaiv zoo rau thermal cuam tshuam.
Khoom siv
Vim lub siab ceev ntawm tungsten, siab hardness, Yog li, nws tau dhau los ua cov khoom siv zoo tshaj plaws rau kev ua cov khoom sib nqus tshwj xeeb, Cov hlau nplaum tshwj xeeb no tau muab faib ua W-Ni-Fe, W-Ni-Cu, W-Co, W-WC-Cu, W-Ag thiab lwm yam loj series, Qhov no hom alloy muaj cov2. Cov yam ntxwv tseem ceebs ntawm siab piv, siab zog, muaj zog nqus hluav taws xob muaj peev xwm, thermal conductivity loj, me me thermal expansion coefficient, zoo hluav taws xob conductivity, weldability thiab zoo processability, yog dav siv nyob rau hauv aerospace, aviation, tub rog, roj drilling, hluav taws xob twj, tshuaj thiab lwm yam kev lag luam, xws li kev tsim khoom siv armor, lub dab dej kub, tswj qhov sib npaug rauj thiab cov ntaub ntawv tiv tauj xws li riam hloov, Circuit Court breaker, qhov chaw vuam electrode, thiab lwm yam.
Electronic field
Tungsten muaj zog plasticity, me me evaporation ceev, siab melting point thiab muaj zog electron emission muaj peev xwm, yog li tungsten thiab nws alloys yog dav siv nyob rau hauv hluav taws xob thiab fais fab kev lag luam.Piv txwv li, tungsten hlau muaj lub siab luminous tus nqi thiab lub neej ntev kev pab cuam, yog li nws yog dav siv nyob rau hauv lub tsim ntawm ntau yam noob filament, xws li incandescent teeb, iodine tungsten teeb, tungsten hlau kuj yuav siv tau nyob rau hauv manufacturing lub ncaj kub cathode thiab lub rooj vag ntawm lub tshuab hluav taws xob oscillator raj thiab ntau yam khoom siv hluav taws xob nyob rau sab thermal cathode rhaub.Cov2. Cov yam ntxwv tseem ceebs ntawm tungsten ua rau nws kuj haum rau TIG vuam thiab lwm yam khoom siv electrode rau kev ua haujlwm zoo sib xws.
Kev lag luam tshuaj
tungsten compounds feem ntau yog siv los ua catalysts thiab inorganic xim, xws li tungsten disulfide yog siv los ua cov roj nplua nyeem thiab catalyst nyob rau hauv cov roj hluavtaws hluavtaws, bronze tungsten oxide yog siv rau hauv paintings, calcium los yog magnesium tungsten feem ntau siv phosphors.
Lwm thaj chaw
Vim tias tungsten zoo ib yam li boryl silicate iav, nws yog siv los ua iav los yog hlau ntsaws ruaj ruaj.tungsten muaj qhov tsis tshua muaj siab thiab siv los ua cov khoom zoo nkauj tungsten kub.Tsis tas li ntawd, tungsten kuj tseem siv rau hauv cov tshuaj siv hluav taws xob, thiab qee cov twj paj nruag kuj tseem siv tungsten hlau.
