1. Ua ntej-Kev Npaj Vuam: Tshem tawm Patina cuam tshuam (Qhov tseem ceeb tshaj plaws)
Txhais qhov chaw tu: Tshem tawm patina los ntawm a20-50 mm dav cheeb tsamntawmob sabntawm qhov sib koom ua ke (xws li zawj qhov chaw yog beveled). Qhov no ua kom cov vuam electrode ncaj qha hu rau cov hlau huv si substrate.
Xaiv txoj kev tu raws li patina thickness
Tshaj tawm - kev tiv thaiv tu: Ua tiav vuamhauv 4-8 teevtom qab ntxuav kom tsis txhob muaj teeb ci tshiab. Yog tias ncua sijhawm, npog thaj chaw huv nrog cov yeeb yaj kiab los tiv thaiv- xeb (tshem tawm ua ntej vuam).
Ntxuav cov chaw uas tsis yog{0}} vuam: So cov seem ntawm lub phaj nrog ib daim ntaub qhuav kom tshem tawm cov plua plav/roj- tiv thaiv kom tsis txhob muaj kab mob kis mus rau hauv pas dej ua ke thaum vuam.
2. Welding Process Control: Match Materials & Optimize Parameters
Siv huab cua steel- cov khoom siv vuam tshwj xeeb
Xaiv cov khoom siv hluav taws xob / cov xaim nrog tib lub alloy muaj pes tsawg leeg (Cu, Cr, Ni) raws li lub hauv paus hlau kom ntseeg tau tias thaj tsam weld muaj qhov sib npaug corrosion:
Kev tuav arc vuam: E7018-C1, E8018-W electrodes.
Gas hlau arc vuam (GMAW): ER80S-G, ER110S-G xov hlau.
Tsis txhob siv cov khoom siv carbon steel generic welding-lawv yuav txo qhov kev ua haujlwm ntawm huab cua.
Optimize vuam parameters
Kub input: Siv tsawg-rau- cov cua kub nruab nrab (15–25 kJ/cm) kom txo qis oxidation ntawm lub pas dej welding thiab tsis txhob ua rau cov patina tsis zoo nyob rau hauv qhov chaw uas tsis yog- vuam.
Arc ntev: Khaws lub arc luv luv (2-3 mm) kom txo tau cov huab cua sib cuag nrog cov hlau molten thiab qis porosity txaus ntshai.
Vuam ceev: Ua kom ruaj khov ceev (10–15 cm / min) - qeeb ceev ua rau overheating, ceev ceev ua rau tsis tiav fusion.
Shielding Gas (GMAW): Siv ib tug sib tov ntawm80% Ar + 20% CO₂los tiv thaiv lub pas dej weld los ntawm atmospheric paug.
Tsis txhob vuam tsis xws luag thaum ua haujlwm
Xyuas kom tag nrho qhov nkag ntawm qhov sib txuas; tsis txhob muaj qhov sib txawv ntawm lub hauv paus daim hlau.
Tshem tawm slag nruab nrab ntawm vuam hla los tiv thaiv slag inclusions.
3. Ncej -Kev Kho Vuam: Rov qab ua kom zoo nkauj & Kev tiv thaiv corrosion
Grind lub weld seam: Siv lub kaum sab xis kom du cov hlaws hlaws thiab tshem tawm cov khoom sib tsoo - xyuas kom meej qhov chaw vuam yog ntws nrog lub hauv paus phaj kom tsis txhob muaj dej tsub zuj zuj (qhov chaw ntawm corrosion).
Restore uniform patina ntawm qhov chaw weld
Ntxuav thaj chaw hauv av nrog acetone kom tshem tawm cov roj seem.
Siv cov hlau huab cua- tshwj xeebpatina acceleratortusyees nyob rau hauv weld seam thiab qhov chaw nyob ib sab.
Khaws 70-90% av noo rau 2-3 hnub los txhawb kev tsim patina-qhov no ua rau thaj tsam weld xim phim cov hlau puag ncig.
Foob rau qhov chaw hnyav: Rau cov phaj siv nyob rau hauv ntug dej hiav txwv / chaw lag luam, siv lub pob tshab breathable fluorocarbon sealant hla tag nrho cov phaj (nrog rau cov vuam) tom qab patina maturation. Rov ua dua txhua 1-2 xyoos txhawm rau txhim kho corrosion.
4. Ncej -Kev Tshawb Fawb Vuam: Tshawb xyuas Vuam Zoo
Kev tshuaj xyuas qhov muag: Txheeb xyuas qhov tsis xws luag ntawm qhov chaw (porosity, tawg, tsis tiav fusion) - tsis lees paub cov phaj uas pom qhov tsis xws luag.
Tsis yog -kev kuaj kev puas tsuaj (NDT): Rau kev siv cov txheej txheem, siv ultrasonic kuaj (UT) lossis kuaj hluav taws xob (RT) txhawm rau txheeb xyuas qhov tsis xws luag hauv qhov vuam.
Corrosion resistance test (yeem): Ua ib qho 200-teev tshuaj tsuag ntsev rau ntawm thaj chaw weld-tsim nyog welds yuav tsim ib lub patina zoo li tsis muaj pitting corrosion.
