Nonferrous Hlau
Tungsten yog cov hlau tsis muaj hlau. Cov hlau feem ntau muab faib ua ob pawg raws li lawv cov xim thiab cov khoom: ferrous hlau thiab non-ferrous hlau. Ferrous hlau tsuas yog xa mus rau hlau, manganese, chromium thiab lawv cov alloys, xws li hlau, npua hlau, ferroalloys, cam khwb cia hlau, thiab lwm yam. Cov hlau uas tsis yog ferrous hlau yog hu ua non-ferrous hlau. Tungsten belongs rau qeb ntawm non-ferrous hlau. Lub zog thiab hardness ntawm non-ferrous alloys feem ntau yog siab dua li cov hlau ferrous, qhov kev tiv thaiv yog ntau dua li cov hlau ferrous, qhov kub coefficient ntawm kuj yog me me, thiab lawv muaj cov khoom zoo txhua yam. Yog li ntawd, raws li ib tug non-ferrous hlau, tungsten muaj zog heev thiab hardness. Vim yog cov yam ntxwv no, tungsten cemented carbide, uas muaj hardness siab thiab muaj zog hnav tsis kam, yog dav siv hauv cov cuab yeej txiav thiab cov cuab yeej mining.
Refractory hlau
Tungsten yog cov hlau refractory nrog lub siab tshaj plaws melting point. Feem ntau, cov hlau uas muaj cov ntsiab lus melting siab tshaj 1650 degree thiab qee qhov nyiaj tshwj xeeb, nrog rau cov hlau uas muaj cov ntsiab lus melting siab tshaj qhov melting point ntawm zirconium (1852 degree), 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, zoo corrosion kuj rau molten alkali hlau thiab vapor, thiab tungsten tsuas tshwm oxide volatilization thiab kua oxide saum toj no 1000 degree. Txawm li cas los xij, nws kuj tseem muaj qhov tsis zoo ntawm qhov muaj qhov kub siab ntawm cov yas-nkig hloov pauv thiab ua rau nws nyuaj rau txheej txheem plastically ntawm chav tsev kub. Cov hlau refractory sawv cev los ntawm tungsten tau dav siv hauv metallurgy, tshuaj lom neeg kev lag luam, electronics, lub teeb qhov chaw, machinery kev lag luam thiab lwm yam sectors.
Tsis tshua muaj hlau
Tungsten yog cov hlau tsis tshua muaj. Cov hlau tsis tshua muaj feem ntau yog hais txog cov hlau uas pom muaj me me los yog faib me me hauv qhov xwm txheej. Tungsten yog cov khoom siv dav dav pom nyob rau hauv yuav luag txhua hom pob zeb, tab sis nyob rau hauv qis concentrations. Cov ntsiab lus ntawm tungsten nyob rau hauv lub ntiaj teb crust yog 0.001%, thiab qhov nruab nrab cov ntsiab lus nyob rau hauv granite yog 1.5 × 10-6, uas ua rau nws nyuaj heev rau extract, thiab feem ntau tsuas yog cais los ntawm cov organic hnyav. extraction thiab ion pauv txoj kev. Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, kev tsim cov tshuab metallurgical, khoom siv thiab kev soj ntsuam thiab kev sim thev naus laus zis, nrog rau kev nthuav dav ntawm cov nplais ntawm cov hlau tsis tshua muaj, cov purity ntawm tungsten tau raug txhim kho tsis tu ncua, kev ua tau zoo tsis tu ncua, thiab ntau yam tau nce, yog li nthuav dav daim ntawv thov ntawm tungsten. Tuam Tshoj yog nplua nuj nyob rau hauv tungsten ore kev pab cuam, thiab cov zis thiab tag nrho export ntawm tungsten account rau thawj qhov chaw nyob rau hauv lub ntiaj teb no.
Strategic Hlau
Tungsten yog ib hom hlau zoo. Raws li peb txhua tus paub, tsis tshua muaj hlau yog cov khoom siv tseem ceeb hauv lub tebchaws, thiab tungsten yog cov hlau tsis tshua muaj nrog kev siv tseem ceeb heev. Nws yog ib qho tseem ceeb ntawm cov khoom siv high-tech niaj hnub no, thiab cov khoom siv hluav taws xob-kho qhov muag, cov khoom siv tshwj xeeb, cov khoom siv ua haujlwm tshiab thiab cov tshuaj organometallic tag nrho xav tau tungsten nrog cov khoom tshwj xeeb. Txawm hais tias tus nqi tsis loj, nws yog ib qho tseem ceeb heev thiab indispensable. Yog li ntawd, nws yog dav siv nyob rau hauv niaj hnub kev sib txuas lus technology, electronics computers, aerospace txoj kev loj hlob, tshuaj thiab kev noj qab haus huv, photosensitive cov ntaub ntawv, optoelectronic cov ntaub ntawv, lub zog cov ntaub ntawv thiab catalyst cov ntaub ntawv.