Tungsten hmoov ntau lawm

Cov txheej txheem ntawm tungsten hmoov ntau lawm muaj xws li hydrogen txo, carbon txo thiab hlau thermal txo. Txoj kev siv ntau tshaj plaws hauv kev lag luam niaj hnub no yog txo qis hydrogen ntawm tungsten trioxide lossis xiav tungsten oxide los ntawm kev txo qis hydrogen hauv thawj lossis theem nrab. Txoj kev no tuaj yeem tswj tau qhov particle zoo, particle loj thiab particle loj muaj pes tsawg leeg ntawm tungsten hmoov. Feem ntau xaiv xiav tungsten oxide doping txheej txheem yog zoo dua. Txoj kev txo qis hauv kev txuag hluav taws xob, hydrogen thiab dej txias dua li ob txoj kev txo qis, thiab tus nqi ntawm cov hmoov tungsten yog tsawg, tab sis qhov kev tsim khoom nyuaj dua.

tungsten hmoov yog tsim, sintered thiab melted kom tau tungsten ntom. Kev siv cov hmoov metallurgy, uas yog, nrog tungsten hmoov los yog tungsten hmoov uas muaj additives, los ntawm molding - pre-sintering - pendant sintering thiab isostatic siab tsim - indirect sintering rau hauv ib daim hlab (doped strips, alloy strips) ob txheej txheem. Cov txheej txheem qub feem ntau yog siv rau hauv cov khoom loj ntawm cov kab me me, thaum cov khoom siv tungsten high-purity feem ntau smelted los ntawm electron beam melting.

Tungsten hmoov los ntawm kev tsim cov tungsten tuav, feem ntau yog los ntawm molding thiab sintering ob txheej txheem:
① Kev tsim kho. Moulding (mechanical forming method) thiab isostatic forming ob txoj kev. Cov qub yog feem ntau tsuas yog siv los nias qhov loj thiab ib qho hnyav ntawm qhov khoob me me, kev ua haujlwm yooj yim dua los tswj qhov loj ntawm qhov khoob thiab qhov zoo ntawm qhov zoo, tab sis qhov ntom ntawm cov blanks me me thiab tsis sib xws. ISostatic siab molding cov qauv tuaj yeem nias tib qho hnyav thiab qhov loj ntawm cov kab ke loj dua (duab plaub ntug), ntu thiab cov khaub ncaws sib npaug. Tab sis lub billet loj thiab zoo li tsis zoo tshaj txoj kev molding, feem ntau nyob rau hauv lub sintering ua ntej cov neeg kho tshuab ua ntawm shaping.
② sintering. Pendant sintering (direct sintering method) thiab indirect sintering method. Sintering ua ntej lub billet yuav tsum tau pre-sintered kom tshem tawm tus neeg sawv cev molding. Pendant sintering tsuas yog siv rau me me billet sintering. Indirect sintering tseem muab faib ua hydrogen-tiv thaiv sintering thiab nqus sintering txheej txheem, uas tuaj yeem sinter loj-loj tungsten billets los yog tungsten qhov chaw yuav tsum tau machined.