1. Cov Khoom Siv Txheej Txheem
Lub hom phiaj: GB / T 4171-2008 (Suav Huab Cua Hlau)
Muaj pes tsawg:
C Tsawg dua lossis sib npaug rau 0.12%, Cu 0.25-0.55%, P 0.07-0.15%, CR 0.30-1.25%, Ni tsawg dua lossis sib npaug rau 0.65%
Txhim khoLAUS LEEM TXHEEJ(patina) rau kev tiv thaiv corrosion.
Cov Khoom Siv Neeg Kho Tshuab:
Yield zog (ntau dua los yog sib npaug rau 345 MPa), Tensile lub zog (ntau dua los yog sib npaug rau 490 MPa)
Kev Cuam Tshuam: Zoo ntawm tsawg kub (sim ntawm-40 Qib).
2. Qhov tseem ceeb vuam cov nyom
(1) hydrogen-inducts cracking (hic) kev pheej hmoo
P (Phosphorus) Cov Ntsiab LusNce tawg rhiab.
Noo noo thiab hydrogenHauv vuam pas vuam yuav tsum muaj tsawg.
(2) Poob ntawm corrosion tsis kam nyob rau hauv weld cheeb tsam
Cov Tsis Raug Rau Cov Ntawv Xaiv Hlau Yuavcuam tshuam kev tiv thaiv pata tsim.
(3) thaj chaw kub-cuam tshuam rau kev sib tsoo
Cov lus txhawb zog ntau dhau yuav txo lub zog nyob ze Wels.
3. Pom zoo vuam txoj kev
| Kev ua | Cev tub tub lim hlau | Tiv Thaiv Roj(yog tias tsim nyog) | Sau ntawv |
|---|---|---|---|
| SMAW (MMA) | J507cnicu(GB / T 5118) | – | Tsawg-hydrogen, Preheat 100-150 degree |
| GMAW (MIG) | Er50-6(AWS A5.18) + CU Txheej | 80% ar + 20}% .. | Tsawg lub ntsej muag, kev nkag siab zoo |
| Fcaw | E71T-1C/J(Aws A5.20) | – | High efficiency, Kev Siv Sab Nraud |
| Txiav ntoo | H08MNA + SJ101 Flux | – | For thick plates (>20mm) |
Preheating:
50-120 Qib (for thickness >12 hli lossis tsawg ambient temp).
Piv txwv: Tsawg dua lossis sib luag rau 200℃kom tsis txhob muaj kev loj hlob ntau dhau.
4. Post-Weld Kho
Kev Raug Tawm Tshem Tawm Slag: Cov ntaub ntawv huv los tiv thaiv kev xeb corrosion.
Hais Txog Kev Sib Koom Tes Ceev: Tsis feem ntau yuav tsum tau (unless for thick sections >30 hli).
Corrosion tiv thaiv:
Tso cai rau ntuj pata tsim.
Yog tias xav tau kev pleev xim, sivHuab Cua-Resistant Primers.
5. Weld Performance Ntsuam Xyuas
Kev ntsuam xyuas txhua yam: Tensile, khoov, thiabCharpy Feem (-40 Qib).
Kev Kuaj Corrosion: Ntsev tshuaj tsuag (Astm B117) thiab cov roj carbon hlau liab qab.
Kev tsim: Ua kom tsis muaj Martension ntau dhau hauv Haz.
6. Kev sib piv nrog lwm cov Weathering Steels
| Ntiag tug | 05cupcrni | Corten A (A242) | Q355gnh |
|---|---|---|---|
| Corrosion Kuj | Zoo tshaj | Zoo tshaj | Zoo |
| Hwj txwv | Zoo (tsawg-h₂ xav tau) | Kev (siab dua p) | Zoo |
| Raug | Txuas hniav, ntim khoom | Architecture, Facades | Cov Qauv Txheej Txheem |
Xaus Lus Qhia & Cov Lus Taw Qhia
Zoo tshaj plaws rau: Txuas hniav, cov tsheb ciav hlau, thiab cov qauv sab nraum zoov uas nyob qhov twgCorrosion Kuj + Weldabilityyog qhov tseem ceeb.
Qhov tseem ceeb tshaj plaws:
Siv cov hluav taws xob tsawg-hydrogen.
Tswj tshav kub tawm (10-25 KJ / CM).
Zam kom tsis txhob muaj kev ua paug.
