Alloy aluminium phaj hauv kev siv tiag tiag ntawm cov txheej txheem, yog qhov yuav tsum tau vuam ua ntej lawv tuaj yeem siv tau, tab sis cov kauj ruam vuam ntseeg tias ntau tus neeg tsis to taub zoo, GNEE cov lus hauv qab no rau koj los qhia luv luv: Ua ntej, vuam kev npaj: lub kev xaiv ntawm cov tshuaj los yog kev siv tshuab, nruj me ntsis ntxuav cov weld bevel ntawm ob sab ntawm cov tsos ntawm oxide zaj duab xis. Kev tu tshuaj yog siv cov alkali los yog kua qaub ntxuav lub ntsej muag ntawm lub workpiece, txoj hauv kev tuaj yeem tshem tawm cov oxide zaj duab xis, tab sis kuj ntxiv rau cov roj, cov txheej txheem tshwj xeeb yog raws li hauv qab no: ntim feem ntawm 6% ~ 10 % ntawm sodium hydroxide tov, soaked nyob rau hauv 70 degree rau 0.5 feeb → ntxuav → ntim feem ntawm 15% ntawm nitric acid soaked nyob rau hauv chav tsev kub rau 1 feeb rau neutralize. kev kho mob → ntxuav → ntxuav → dej sov ntxuav → qhuav. Tom qab ntxuav, cov tsos ntawm cov hlau txhuas phaj yog nyiaj-dawb yam tsis muaj luster. Ntxuav tam sim ntawd tom qab vuam, yog tias muab tso rau ntau tshaj 4 teev, yuav tsum tau rov ntxuav dua.
Thib ob, txhawm rau txiav txim siab qhov sib txawv ntawm qhov sib txawv thiab qhov chaw vuam qhov deb ntawm vuam txheej txheem, aluminium alloy phaj thermal expansion, ua rau vuam bevel qhov sib txawv, ua ntej vuam qhov sib txawv yog tias tshuav me me, cov txheej txheem vuam yuav ua rau ob lub laug cam ntawm bevel sib tshooj, ntxiv weld phaj unevenness thiab deformation; ntawm qhov tsis sib xws, qhov sib txawv ntawm qhov sib txawv yog qhov loj heev, nws nyuaj rau welding, thiab muaj peev xwm hlawv-los ntawm. Tsim nyog qhov chaw vuam qhov deb tuaj yeem ua kom ntseeg tau tias qhov xav tau qhov chaw vuam qhov sib txawv, yog li ntawd, xaiv qhov tsim nyog qhov sib txawv thiab qhov chaw vuam qhov deb, yog los txo qhov deformation ntawm txoj kev zoo.
Thib peb, kev xaiv cov khoom siv vuam ntawm kev ua lag luam tam sim no ntau cov khoom siv vuam ntau yam, nws yog feem ntau pom zoo xaiv AC tungsten argon arc vuam (xws li, TIG vuam). Nws yog nyob rau hauv kev tiv thaiv ntawm argon roj, kev siv tungsten electrode thiab workpiece thov kom tshwm sim nyob rau hauv lub arc tshav kub melting puag khoom thiab muab tub lim hlau ntawm ib tug vuam txoj kev. Lub vuam tshuab ua haujlwm, vim tias qhov polarity ntawm AC tam sim no nyob rau hauv lub voj voog ntawm kev hloov, nyob rau hauv txhua lub voj voog ib nrab-yoj DC zoo sib txuas, ib nrab-yoj DC rov qab txuas. Kev sib txuas zoo ib nrab-yoj thaum lub sij hawm tungsten electrode tuaj yeem tawm cov hluav taws xob txaus tsis muaj cua sov, uas yog qhov zoo rau kev ruaj ntseg ntawm arc. Rov qab ib nrab-yoj lub sij hawm ntawm lub workpiece nto generated thaum lub sij hawm oxide zaj duab xis yog ib qho yooj yim los ntxuav thiab tau txais cov tsos ntawm ci thiab zoo nkauj, tsim ib tug zoo weld.
Plaub, kev xaiv ntawm vuam hlau feem ntau xaiv 301 ntshiab txhuas hlau thiab 311 txhuas silicon hlau. Kev xaiv ntawm vuam txoj kev thiab tsis yog feem ntau sab laug vuam txoj kev, lub teeb thiab lub workpiece mus rau hauv lub kaum sab xis 60 degree. Vuam thickness ntawm 15 hli los yog ntau tshaj, mus rau txoj cai vuam txoj kev, lub teeb thiab lub workpiece mus rau hauv lub kaum sab xis 90 degree. Vuam phab ntsa thickness ntau tshaj 3 hli, qhib V-shaped bevel, lub kaum sab xis ntawm 60 degree ~ 70 degree, qhov sib txawv yuav tsum tsis txhob ntau tshaj 1 hli, ua kom tiav cov txheej txheem vuam ntau. Phab ntsa thickness ntawm 1.5mm los yog tsawg dua, tsis muaj bevel, tsis muaj qhov sib txawv, tsis muaj cov xaim xaim. Vuam tsau yeeb nkab pob tw pob qij txha, thaum cov yeeb nkab txoj kab uas hla ntawm 200 hli, phab ntsa thickness ntawm 6 hli, yuav tsum tau xaiv rau txoj kab uas hla ntawm 3 ~ 4 hli tungsten electrode, 220 ~ 240A vuam tam sim no, txoj kab uas hla ntawm 4 hli muab tub lim hlau, mus rau 1 ~ 2 txheej vuam .
