1. Strictly Match Weathering Welding Materials
Cov kev xaiv pom zoo: MMA electrodeE5015-G, MIG/TIG wireER50-G, submerged arc vuam hlauH08Mn2SiCuA+ flux SJ101.
Txwv tsis pub cov pa roj carbon steel vuam cov ntaub ntawv: Lawv yuav ua rau thaj tsam weld xeb sai dua thiab poob huab cua ua haujlwm.
2. Tswj vuam cua sov input (Core Requirement)
nyias daim hlau (3-12mm): Txaislow-cov tswv yim cua sov(TIG/MIG/laser welding), ceev ceev mus los, ib zaug -thov vuam (tsis txhob ntau- hla dhau cua sov).
Cov phaj nruab nrab / hnyav (Ntau dua lossis sib npaug li 14 hli): Preheat cov ntaub ntawv hauv paus rau80-150 degree(tsis siab tshaj 200 degree) los tiv thaiv qhov txias txias; interpass kub Tsawg dua los yog sib npaug rau 250℃, multi-dhau vuam nrog me me tshav kub input ib pass.
Ntawm -site MMA vuam: Siv me me - txoj kab uas hla electrodes (2.5–3.2 mm) thiab qis tam sim no los txo cov cua sov.
3. Targeted Treatment rau Weld Edges & Seams
Sib tsoo weld seams kom tshem tawm spatter, burrs thiab undercutting, ua rau saum npoo du (tshem tawm cov ntsiab lus corrosion pib).
Thovnyias pob tshab weathering sealer lossis passivation tovmus rau vuam seams, txiav npoo thiab tshav kub- thaj chaw cuam tshuam (HAZ) - tsis muaj txheej txheej, tsuas yog tiv thaiv ib ntus rau thawj zaug oxidation.
Tsis txhob tawm vuam slag rau ntawm qhov chaw; nws yuav thaiv kev tsim patina thiab ua rau thaj chaw pitting corrosion.
4. Txo qis tshaj tom qab- Weld Thaum tshav kub kub kho (tsis muaj siab-Tsub Annealing)
Tsis muaj ncej-weld annealing/normalizing (temperature >600 degree): Ua rau recrystallization, ua hauj lwm hardening poob thiab txo patina - muaj peev xwm tsim.
Tsuas yog kev ntxhov siab rau cov phaj hnyav (Ntau dua lossis sib npaug li 50 mm): Tsawg-kub kev ntxhov siab nyem ntawm150-200 degreerau 1-2 teev kom txo tau qhov kev ntxhov siab ntawm qhov seem (tsis txhob muaj kev sib tsoo / deformation), tsis cuam tshuam rau cov khoom siv hauv paus.
5. Ua ntej- Weld Surface Cleaning
Siv sandblasting, hlau txhuam los yog degreasing cov neeg ua haujlwm (xws li, acetone) los ntxuav; residual contaminants yuav ua rau weld porosity, inclusions thiab tsis muaj zog pob qij txha.
Xyuas kom lub vuam nto yog qhuav; noo noo ua rau hydrogen-induced txias cracking (tshwj xeeb tshaj yog rau daim hlau loj dua los yog sib npaug li 30 mm).
6. Tsis txhob vuam nyob rau hauv ib puag ncig hnyav
Forbid welding in rain, snow or high humidity (RH >80%): Yog tias tsis tuaj yeem zam tau, siv cov khoom siv los tiv thaiv- cov av noo thiab cov npog tiv thaiv (xws li cov tsev pheeb suab ntaub).
Vuam nyob rau hauv ntug dej hiav txwv / ntsev- ib puag ncig tshuaj tsuag: Ntxuav thaj chaw weld tam sim ntawd tom qab vuam thiab siv lub sealer ib ntus los tiv thaiv cov ntsev pos los ntawm corroding qhov tshiab weld nto.
