1. Cov khoom tseem ceeb
| Ntiag tug | Tus nqi(Metric) | Tus nqi(Imperial) |
|---|---|---|
| Paib lub zog (rov qab) | Ntau dua los yog sib npaug rau 345 mpa | Ntau dua los yog sib npaug rau 50 ksi |
| Lub zog tensile (RM) | 490-690 MPA | 71-100 Ksi |
| Elongation (A₅) | Ntau dua los yog sib npaug rau 22% | Ntau dua los yog sib npaug rau 22% |
| Kev Cuam Tshuam Tougness (KV) | Ntau dua los yog sib luag rau 27 j ntawm -20 degree | Ntau dua los yog sib npaug rau 20 ft-lb ntawm -4℃f |
Sau ntawv:
Piv rauCorten B (ASTM A588)thiabS355J2WP (EN 10025-5).
Siab duamanganese (mn)Cov ntsiab lus txhim kho lub zog thiab cov tawv tawv.
2. Tshuaj lom neeg sib xyaw
| Lub ntsiab | Muaj pes tsawg leeg (%) | Lub luag haujlwm hauv huab cua kev ua haujlwm |
|---|---|---|
| C | Tsawg dua los yog sib npaug rau 0.15 | Sib npaug lub zog & Weldability |
| Mn | 0.80–1.50 | Txhim kho cov tawv tawv thiab tawv |
| Si | 0.15–0.40 | Txhim kho oxidation tsis kam |
| P | Tsawg dua los yog sib npaug rau 0.035 | Minimizes brittleness |
| S | Tsawg dua los yog sib npaug rau 0.035 | Txo qhov kub-luv |
| CU | 0.20–0.50 | Cov qauv tiv thaiv Patina |
| Cr | 0.30–0.65 | Nce corrosion tsis kam |
Qhov tseem ceeb ua raws cov teebmeem:
CU + CR→ Stickilizes stust txheej, tiv thaiv kev sib kom tob corrosion.
Mn + siTxhim kho lub zog tsis muaj zog yam tsis muaj Weldability.
3. Corrosion Kuj & Ib puag ncig kev ua yeeb yam
Patina tsim
Tsim ANtuab, adherent txheejtom qab1-3 xyoosntawm kis tau.
Kev Tiv Thaiv Kev Tsim Kho: Lub patina ua raws li txoj kev thaiv, txo qhov kev xeb ntxiv (tus nqi)0.002-0.005 mm / xyooNyob rau hauv lub nroog / nroog thaj chaw).
4. Fabrication & Vuam Cov Lus Qhia
Machining & Txiav
Ntshav / laser txiav: Nyiam rau cov npoo huv.
Oxyfuel Txiav: Tau tab sis yuav xav tau kev sib tsoo tom qab txiav ntoo.
Lus pom zoo vuam
Preheat: 100-150 degree (for thickness >20mm).
Cov Hluav Taws Xob: SivTsawg-Hydrogen Rods(piv txwv li, aws E7018-W2).
Tom qab Weld: Zam kev sib tsoo; Cia patina daim ntawv ib txwm muaj.
5. Cov ntawv thov raug
✔ Txuas hniav & txoj kev loj
✔ Tshuaj Tiv Thaiv
✔ Cov Cuab Yeej Archades & Duab puab
✔ Railway Wagons & Cov Thawv Thauj Khoom
