Cov lus nug ntawm txoj kev siv tau yooj yim tshaj plaws ntawm cov khoom siv vuam los ntawm cov ntshiab txhuas thiab nws cov alloys ntau yam tseem ceeb heev vim lawv daim ntawv thov dav. Ib qho ntawm cov thev naus laus zis tshaj plaws yog argon vuam ntawm aluminium. Feem ntau, deformable non-heat-hardened aluminium alloys yog welded, uas muaj xws li kev txhuas (qib AD, AD1), alloys raws li txhuas thiab manganese (AMts), txhuas thiab magnesium (AMg). Xws li cov alloys feem ntau nyuaj rau vuam. Yog li ntawd, lawv tau siv yog tias kev kho cua sov ua tau rau cov qauv.
Aluminium oxide tsim ib zaj duab xis refractory ntawm qhov chaw (Tmelt Al2O3=2050 ° C), muaj ib tug siab ceev tshaj ntawm cov hlau nws tus kheej. Thaum cov oxide zaj duab xis raug rhuav tshem, nws cov khoom ua paug rau lub pas dej ua ke, ua rau kev sib txuas ntawm cov npoo. Yog li ntawd, argon vuam ntawm aluminium yog qhov zoo dua tom qab kev tshem tawm cov oxide los yog etching ntawm lub hauv paus thiab muab tub lim hlau. Cov teeb meem ntxiv yog tshwm sim los ntawm qhov sib txawv tseem ceeb ntawm cov ntsiab lus melting ntawm Al (Тmelt=660 ° C) thiab nws cov oxide.
Thaumargon vuam ntawm txhuas yog ua nrog cov khoom siv tsis siv tungsten electrode, alternating tam sim no yog siv. Nyob rau hauv cov ntaub ntawv no, oxide zaj duab xis yog puas nyob rau hauv ib nrab-kawg ntawm rov qab polarity, thaum lub electrode account rau 70% ntawm cov cua sov ntawm lub arc, thiab cov khoom - 30% (cathode sputtering tshwm sim).
Lub zog ntawm cov hlau txo qis ntawm qhov kub siab, uas tuaj yeem ua rau kev puas tsuaj ntawm cov npoo ntawm cov npoo hauv qab qhov hnyav ntawm lub pas dej ua ke. Qhov nce fluidity ntawm Al yaj ua rau muaj qhov tshwm sim ntawm nws ntws tawm ntawm cov hauv paus hniav. Txhawm rau tiv thaiv kev kub nyhiab thiab ua tsis tiav ntawm cov seam, yog tias argon vuam tau ua tiav, cov thev naus laus zis yuav suav nrog kev siv cov txheej txheem ceramic (graphite, steel) linings. Qhov no yog ua tiav thaum welding ib txheej hlau los yog thawj txheej txheej ntawm ntau qhov kev sib txuas.
Qhov kev xav tau ntawm aluminium alloys rau warp tuaj yeem kov yeej los ntawm kev vuam ntawm qhov kub thiab txias thiab ua kom sov rau qhov sib koom ua ke. Qhov tshwm sim ntawm hydrogen porosity ntawm weld, uas yog tshwj xeeb tshaj yog pom nyob rau hauv alloys nrog magnesium, yog txo los ntawm cua sov rau T=150-250 ° C ua ntej thiab thaum lub sij hawm vuam, raws li zoo raws li los ntawm kev tu kom huv si ntawm cov npoo thiab vuam hlau. Txhawm rau kom tsis txhob kub tawg, cov seams yuav tsum tsis txhob nyob ze rau ib leeg. Nws tseem raug tso cai ntxiv cov kev hloov kho tshwj xeeb rau cov hlau.
Argon vuam ntawm txhuas cuam tshuam nrog kev siv cov roj tiv thaiv ib puag ncig ntawm cov roj inert argon, uas hloov huab cuahuab cua los ntawm lub pas dej weld thiab lub plasma arc. Yuav siv tau Ar (qib siab tshaj lossis thawj qib). Lwm qhov kev tiv thaiv kev tiv thaiv yog helium, sib xyaw ntawm helium thiab argon, tab sis tom qab ntawd qhov kev tiv thaiv roj tau nce me ntsis.
Txoj kab uas hla ntawm lub tungsten electrode uas tsis siv tau (tshwj tsis yog siv cov khoom siv ntshiab, lanthanum lossis yttrated electrodes) raug xaiv nyob ntawm qhov tuab ntawm cov khoom. Vuam hlau ntawm ntau qib ua raws li cov khoom siv muab tub lim, uas nyob ntawm qhov muaj pes tsawg leeg ntawm cov khoom tseem ceeb thiab cov thickness ntawm cov npoo. Ua-nws-koj tus kheej zoo argon vuam tuaj yeem ua tiav ntawm kev hloov tam sim no (kev teeb tsa ntawm hom UDG) ua raws li cov qauv tsim nyog xaiv los ntawm tus kws paub txog kev siv vuam. Ib tug pib yuav tsum xub paub nws tus kheej nrog cov ntaub ntawv sau, uas qhia cov qauv thiab nuances ntawm aluminium vuam.
