1. Xaiv cov khoom siv vuam tsim nyog
Phim rau corrosion tsis kam: Siv vuam consumables (electrodes, xaim) tsim rau huab cua hlau, xws li cov qauv hlau, lossis cov qhab nia zoo sib xws hauv lwm cov qauv (piv txwv li, en 16002). Cov no muaj cov khoom siv alloy (Cu, CR) kom ntseeg tau tias weld hlau ua ib qho kev tiv thaiv ib qho sib npaug ntawm cov hlau.
Zam kev ua tau zoo tib yam: Tsis txhob siv cov qauv steel hlau vuam (piv txwv li, E6010, E7018) yog tias lawv yuav txo thaj Weld cheeb tsam tiv taus, ua rau muaj xeb.
2. Tswj Vuam Cov Lus Ntsuas
Cov tswv yim tshav kub: Cov lus sov ntau dhau (siab tam sim no, qeeb mus ncig ua si nrawm) tuaj yeem ua rau:
Grain grainening nyob rau hauv cov cua sov -} be} cuam tshuam cheeb tsam (Haz), txo qis.
Hlawv - tawm ntawm cov ntsiab lus hoyoy (tshwj xeeb yog P, CR) hauv Weld, tsis muaj zog corrosion tsis kam.
Pom zoo kom sov tawm tswv yim: feem ntau 15-35 KJ / CM (kho raws li cov ntaub tuab).
Sib txuam Kub: Kom tuab daim hlau (ntau dua los yog sib npaug nrog 12 hli), tswj hwm interpass kub hauv qab 250℃(lossis raws li tau hais los ntawm kev sib tw sib tsoo) los tiv thaiv haz embrittlightlement.
3. Pre -} vuam npaj
Ntxuav lub hauv paus hlau: Tshem tawm cov roj, pleev xim, xeb, lossis oxide txheej tsis pub dhau 20-30 hli ntawm weld sib koom siv hlau txhuam, grinders, lossis tshuaj ntxuav. Cov khoom paug tuaj yeem ua rau muaj peev xwm lossis txo cov nplaum weld.
Zam kev preheating (tshwj tsis yog tsim nyog)：SPA-H has good weldability at room temperature. Preheating (above 150°C) is only required for thick plates (>25mm) lossis hauv ib puag ncig txias (<0°C) to prevent cold cracking. Over-preheating may degrade corrosion resistance.
4. Tshaj tawm -} vuam kho
Tsis muaj kev kho cua sov: Tsis zoo li high high - lub zog steels, spa-} tuaj yeem hloov patina - Txoj kev muaj peev xwm. Kev nyuaj siab nyem (yog tias xav tau rau cov ntu tuab) yuav tsum tau ua kom tsawg dua lossis sib npaug rau 620℃kom zam dhau Alloy keeb diffusion.
Nto Kho Rau Corrosion Kuj:
Tshem tawm vuam nto moo, txhuam, thiab oxides siv sib tsoo lossis xaim txhuam hniav los xyuas kom muaj kev sib tsoo patin thiab cov hlau hauv paus.
Rau cov ntawv thov tseem ceeb (piv txwv li, cov dav hlau ntug hlau primer rau lub chaw weld kom nrawm rau kev txhim kho patinion.
5. Vuam Txoj Kev
Cov txheej txheem haum: Smaw (lo vuam), gmaw (MIG), thiab FCAW (flux {{0} {} cored arc vuam) yog nyiam. Zam kom tsis txhob oxy- roj av vuam, raws li nws ua kom sov ntau dhau thiab tej zaum yuav paug cov weld.
Tiv Thaiv Roj: Rau GMaw, siv ar + 2}}}}}}}}} kev thaiv cov roj kom txo cov porosity thiab ua kom ntseeg tau zoo Weld duab.
6. Tsis txhob muaj kev cuam tshuam vuam tsis xws luag
Porosity: Nquag nyob rau hauv spa - h vim nws p cov ntsiab lus. Xyuas kom meej cov ntaub ntawv huv, kom tsim nyog tiv thaiv cov roj txaus, thiab tsis txhob ya raws plab gluxes / electrodes.
Txias tawg: Tab sis tsis tshua muaj, nws yuav tshwm sim rau hauv cov kab tuab lossis siab - av noo ib puag ncig. Siv qis - hydrogen hydrogen welding consumables (cia rau hauv cov nqi qhuav.
Undercut lossis tsis tiav fusion: Cov kev tsim cov crevices qhov chaw uas corrosion tuaj yeem pib ua haujlwm. Ua kom ntseeg tau tsim lub teeb thiab nrawm.
7. PATINE tsim muaj xwm txheej
Weld cheeb tsam thiab cov hlau yuav tsum tsim cov khaub ncaws patina dhau sijhawm. Qhov sib txawv hauv cov ntsiab lus hauv cov ntsiab lus lossis kev ua kom tiav ntawm lawv tuaj yeem ua rau "Galvanic corrosion" (huab cua tsawg {1} {ristant thaj chaw corrodes sai dua).
Tom qab vuam, yog tias weld nto yog tsis ncaj los yog oxidized, maj mam zom nws kom phim cov hlau hauv lub hauv paus pib, txhawb kev sib txawv patina kev loj hlob.
