1. Cov Khoom Siv Txheej txheem cej luam (A606 Hlau)
Ntaus: Huab Cua Hlau (Zoo ib yam li AQUM A588, Corten)
Qhov tseem ceeb alloys: CU, CR, NI, P (Txhim Kho Corrosion Kuj)
Paib lub zog: 345 MPa (50 Ksi) Min
Tseem ceeb tshaj tawm: Ua cov txheej xeb tiv thaiv ("patina") dhau sijhawm
2. Kev Npaj Ua Ntej
(1) Taug Kev Tu
Tshem tawmzeb nplai, xeb, roj, lossis xim pleev ximSiv sib tsoo, sandblasting, lossis tshuaj ntxuav kom huv.
Ua kom tau tiag tiagCov npoo sib koom tau huv(Tsis muaj cov paug).
(2) sib koom ua ke tsim & haum-up
Bevelling: SivV-groove, j-groove, lossis u-zawj for thick plates (>6 hli).
Lub Nkag Kev Tswj Xyuas: Tswj hwm1.5-3mm paus sib txawvrau tag nrho nkag mus.
Preheat (yog tias yuav tsum tau):
Preheat temp: 50-150 degree (depends on thickness, typically needed for >20mm daim hlau).
Piv txwv: Tsawg dua lossis sib npaug200 degree(kom tsis txhob ua kom sov dhau los).
3. Kev sib tw txoj kev & Cov Khoom Siv
(1) Cov txheej txheem pom zoo
| Txojkev | Zoo tshaj plaws rau | Sau ntawv |
|---|---|---|
| Smig (pas) | Teb vuam, kho vaj | Siv cov pas nrig tsawg-hydrogen |
| GMAW (MIG) | SIAB CEEV NTAU LAWM | Yuav tsum tau tiv thaiv roj (Ar + boos) |
| FCAW (Flux-cored) | Hnyav daim phiaj, cov vuam vuam | Tus kheej thaiv tus kheej lossis cov pa thaiv |
| Gtaw (Tig) | Precision, daim hlau nyias nyias | Siab ua tiav |
(2) Muab tub lim cov kev xaiv hlau
AWS Kev faib tawm:
Lub ntsej muag: E7018-W(Cov Hydrogen, Weathering Qib)
GMAW / FCAW: ER70s-6(rau cov hlau me) lossisEwni-1(Rau kev sib tw corrosion zoo dua)
Gtaw: Er70s-2(cov tsev ntxhua khaub ncaws weld)
Tsab ntawv: Yog hais tias muaj hluav taws xob hluav taws xob yog qhov tseem ceeb, sivCorten-tshwj xeeb fillers (e.g., Aws A5.28 ER80S-NI1).
4. Vuam tsis muaj
(1) cov chaw raug
| Kev ua | Tam sim no (a) | Voltage (v) | Mus Ncig Ceev | Roj (yog siv) |
|---|---|---|---|---|
| Lub ntsej muag | 90-140 (DC +) | 22–28 | Tswj kav | N/A |
| Gmaw | 150–250 | 22–30 | Kev yoov mov | 75% ar + 25}% koom |
| Fcaw | 180–300 | 24–32 | Nruab nrab | CO₂ lossis tus kheej tiv thaiv |
(2) Kev tswj kom sov sov tswj
Max sov tawm tswv yim: Tsawg dua lossis sib luag rau 2.5 KJ / hli(kom tsis txhob hez brittleness).
Kev txawj:
Kev sivtxoj hlua khi ntawm cov hlaws dai(Zam kev tawm mus ntau dhau los).
Multi-Pass Vuamrau cov phiaj tuab.
5. Post-Welding Kho
(1) txias tus nqi
PubNtuj Txias(Zam txhob quenching).
(2) post-weld kev kho cua sov (duab, yog xav tau)
Kev ntxhov siab tau txais kev ntxhov siab: 550-650 degree(rau cov ntawv thov tseem ceeb).
(3) nto moo
Kev sib tsoo: Du weld seams kom phim cov hlau sib tw.
Patina tsim:
Huab Cua Hlau Yuavtsim kev siv ua ntev dhau sijhawm(Tsis tas yuav pleev xim).
Yog tias yuav tsum tau pleev xim, sivHuab Cua Huab Cua Rauv.
6. Kev tshuaj xyuas & Kev tswj kom zoo
Kev Ntsuam Xyuas Kev Pom Zoo (VT): Txheeb xyuas cov kab nrib pleb, porosity, undercut.
NDT (yog tias yuav tsum tau):
Zas cenetant (PT)rau nplaim degrom.
Ultrasonic (UT)lossisX-Ray (RT)rau sab hauv flaws.
Kev ntsuas hardness: Kom ntseeg tau haz tawv tsawg dua lossis sib npaug350 Hv.
