Argon vuam ntawm txhuas: dab tsi yog qhov yooj yim ntawm cov

Qhov teeb meem ntawm feem ntau muaj nyob rau txoj kev vuam ntawm txhuas nyob hauv cov ntshiab daim ntawv thiab nws cov ntau alloys heev yam nyob rau hauv kev twb kev txuas nrog lawv sab daim ntawv thov. Ib tug ntawm cov technologies xam tau tias yog argon vuam ntawm txhuas. Feem ntau welded netermouprochnyaemye deformable txhuas alloys uas cov kev txhuas (marks AD AD1) raws li nyob rau hauv txhuas alloys thiab manganese (AMts), txhuas thiab magnesium (AlMg). Tej alloys dua xws li yooj yim-rau. Vim hais tias lawv yog siv, yog hais tias tus tshav kub kev kho mob yog ua tau rau cov qauv.

Alumina txoj kev refractory zaj duab xis nyob rau qhov chaw ntawm lub workpiece (TM Al ₂ O ₃ = 2050 ° C), muaj ib tug ntau dua ceev tshaj cov hlau nws tus kheej. Nrog rau cov kev puas tsuaj ntawm cov oxide zaj duab xis ntawm nws cov hais paug welded da dej, complicating kev twb kev txuas npoo. Yog li ntawd argon vuam ntawm txhuas yog preferable tom qab cov neeg kho tshuab oxide tshem tawm los yog etching los luj thiab muab tub lim hlau. Ntxiv complexity thiab ua ib tug tseem ceeb sib txawv nruab nrab ntawm tus Al melting (TM = 660 ° C) thiab nws cov oxide.

Thaum ib tug argon Vuam nrog non-consumable tungsten electrode ntawm txhuas, ib tug alternating tam sim no yog muaj ntaub ntawv. Nyob rau hauv cov ntaub ntawv no, lub oxide zaj duab xis yog puas nyob rau hauv lub rov qab polarity ib nrab-ib ncig thaum ib tug electrode yog 70% thaum tshav kub kub tiam ntawm lub arc, thiab cov khoom - 30% (sputtering tshwm sim).

lub dag lub zog ntawm cov hlau txo sharply nyob ntau dua kub, uas muaj peev xwm ua rau puas tsuaj ntawm unmelted feem ntug nyob rau hauv lub ceeb thawj ntawm lub weld pas dej ua ke. Nce qhuav ntws Al tsub kom qhov yuav ntawm to los ntawm lub hauv paus ntawm lub weld. Nyob rau hauv thiaj li yuav tiv thaiv kom txhob hlawv qhab nia thiab weld failures, yog tias ua argon vuam tshuab Tej zaum yuav tau siv txoj kev hub (graphite thiab steel) pawm no ntau npau. Cosi, vuam los yog cov thawj zaug ib leeg-txheej hlau khaubncaws sab nraud povtseg thiab multi-leeg.

Ib tug muaj zog ib txwm mus nkhaus txhuas alloys yuav kov yeej los nqa tawm vuam nyob rau qib siab kub tej yam kev mob thiab cov huab cua sov cov ua hauj lwm daim. Cov tshwm sim hydrogen weld porosity, tshwj xeeb yog hnov nyob rau hauv alloys nrog magnesium, by means of cua kub yog txo mus rau T = 150-250 ° C ua ntej thiab thaum lub sij hawm Vuam, thiab los ntawm ib tug ua tib zoo tu ntawm npoo thiab welded xaim. Nyob rau hauv thiaj li tsis mus tshwm kub tej kab nrib pleb, nqaws yuav tsum tsis txhob nyob ze rau txhua lwm yam. Nws yog tseem tau ntxiv ntawm tshwj xeeb modifiers nyob rau hauv pab tau hlau.

Argon txhuas vuam yuav siv cov kev tiv thaiv ib puag ncig ntawm gaseous inert argon gas displacing cov huab cua cua ntawm lub weld da dej thiab ntshav arc. Ii yuav AR (siab tshaj plaws los yog thawj class). Lwm embodiment ntawm kev tiv thaiv - Helium, sib tov ntawm Helium thiab argon, tab sis, ces tus tiv thaiv cov roj ndlwg dog dig zog.

Inch nonconsumable tungsten electrode (tshwj tsis yog pure, los yog siv lanthanised ittrirovannye) yog xaiv nyob ntawm seb cov khoom thickness. Raws li cov tub lim cov ntaub ntawv uas ua vuam hlau ntawm ntau yam qib, nyob ntawm seb muaj pes tsawg leeg ntawm lub ntsiab yam khoom thiab ntug thickness. High-zoo argon Vuam tus kheej ob txhais tes yuav ua tau rau ib tug alternating tam sim no (UDG hom installation) nrog rau qhov tsim nyog hom, uas yog xaiv ib tug tej welder. Lub beginner yuav tsum xub tau ntsib nrog rau cov ntaub ntawv qhov chaw, specifying lub hom thiab nuances ntawm Vuam txhuas.