Yog tias cov roj tsis tau tso tawm los ntawm cov hlau ua ntej cov hmoov txheej, cov teeb meem xws li pob, npuas, thiab pinholes yuav tshwm sim.Nyob rau hauv lub ntiaj teb no ntawm hmoov txheej, cam khwb cia hlau nto xws li hlau, hlau, thiab txhuas tsis yog ib txwm zam.Cov hlau no ntxeem cov hnab ntim cov pa roj, huab cua thiab lwm yam khoom tsis huv hauv cov hlau thaum lub sijhawm casting txheej txheem.Ua ntej cov hmoov txheej, lub rhiav yuav tsum tshem tawm cov roj thiab impurities ntawm cov hlau.Cov txheej txheem ntawm kev tso pa tawm los yog cov pa phem yog hu ua degassing.Yog tias lub khw muag khoom tsis zoo degassed, ces teeb meem xws li pob, npuas, thiab pinholes yuav ua rau poob ntawm adhesion ntawm coatings thiab rework.Degassing tshwm sim thaum lub substrate yog rhuab, uas ua rau cov hlau nthuav thiab ntiab gases thiab lwm yam impurities.Nws yuav tsum tau muab sau tseg tias thaum lub sij hawm kho cov txheej txheem ntawm cov hmoov coatings, residual gases los yog cov pa paug nyob rau hauv lub substrate kuj yuav raug tso tawm.Tsis tas li ntawd, cov roj tso tawm thaum lub sij hawm txheej txheem ntawm casting lub substrate (xuab zeb casting los yog tuag casting).Tsis tas li ntawd, qee cov khoom (xws li OGF additives) tuaj yeem ua kom qhuav nrog cov hmoov txheej los pab daws qhov tshwm sim no.Rau cam khwb cia hlau hmoov txau, cov kauj ruam no tuaj yeem ua kom yuam kev thiab siv sijhawm ntxiv.Txawm li cas los xij, lub sijhawm ntxiv no tsuas yog ib feem me me ntawm lub sijhawm yuav tsum tau rov ua haujlwm dua thiab rov pib dua tag nrho cov txheej txheem.Txawm hais tias qhov no tsis yog kev daws teeb meem tsis zoo, siv nws nrog cov txheej txheem tshwj xeeb thiab cov txheej txheem saum toj kawg nkaus tuaj yeem pab daws teeb meem outgassing.2021 yuav tshwm sim ua ntej koj paub nws.Nws yuav cim qhov pib ntawm kaum xyoo tshiab thiab coj kev hloov pauv rau lub ntiaj teb raws li peb paub.Tau ntau tshaj 50 xyoo, cov txaj fluidized tau siv los ua cov khoom siv nrog cov hmoov txheej.Hauv tsab xov xwm no, ob tus kws tshaj lij kev lag luam tau daws qee qhov teeb meem ntsig txog cov txheej txheem txaj fluidized…