1. Kev Npaj Ua Ntej
Deg Tu:
Tshem tawm covTiv thaiv Patina (xeb txheej)Ze rau hauv Weld thaj chaw siv sib tsoo lossis txhuam hniav.
Tshemzeb nplai, roj, thiab noo nookom tsis txhob muaj porosity.
Preheating (yog xav tau):
Rauthick sections (>20mm), preheat rau100-150 degreeTxhawm rau tiv thaiv cov cracking (vim yog cov pa hluav taws xob siab sib npaug, CE).
2. Kev sib tw cov qauv & cov ntaub ntawv
(A) Cov txheej txheem pom zoo:
Cov thaiv hlau arc vuam (smaw):
Ntau yam rau kev ua haujlwm (piv txwv li, txuas hniav).
Roj Hlau Hlau Arc Vuam (Gmaw / Mig):
Zoo dua rau cov chaw tswj.
Flux-cored arc vuam (FCAW):
Haum rau sab nraum zoov, muaj cua hlob.
(B) Sau cov chaw xaiv hlau:
Sib phim cov hlau:
Kev sivTsawg-alloy electrodes(piv txwv li, aws E7018-W rau Astm A588).
Stainless hlau fillers (309L / 312)rau dissimilar hlau pob qij txha.
Cov yam ntxwv tseem ceeb:
Ntau NI / Crary Cov Ntsiab Luskom replicate weathering tsis kam.
3. Tom qab vuam kev kho mob
• Kev tshem tawm slag:
◦ SHANL SLAG kom tsis txhob muaj kev sib cav corrosion.
• Patina rov kho dua:
◦ Cia cov xeb lossis nrawm nrog cov tshuaj ntsev / cyclic ntub dej qhuav.
• Zam kom zam cov xim tshwj tsis yog tsim nyog:
◦ Yog pleev xim yog pleev xim, siv cov pa pleev xim kom tsis txhob ntxiab noo noo.
