1. Cov yam ntxwv tseem ceeb
① Huab cua tiv thaiv
Cov ntaub ntawv aTiv thaiv cov xeb (patina)Thaum nthuav tawm huab cua, txo qis ntxiv corrosion.
Muajalloying ntsiab (Cu, CR, NI, P)Txhawm rau txhim kho cov khoom siv hluav taws xob corrosphion tsis kam.
Tshem tawm qhov xav tau kev pleev kob hauv ntau daim ntawv thov, txo tus nqi kho.
② Cov Khoom Siv Neeg Khoyam (EN 10155 Txuj)
| Ntiag tug | Tus nqi |
|---|---|
| Paib lub zog (rov qab) | Ntau dua los yog sib npaug355 MPa |
| Lub zog tensile (RM) | 470-630 MPa |
| Elongation (A₅) | Ntau dua los yog sib npaug20% |
| Kev Cuam Tshuam Toubse (Charpy V-Notac, -20 degree) | Ntau dua los yog sib npaug27 J (J2 Qib Yuav Tsum) |
| Brinell hardness (HBW) | ~ 140-180 HBW |
③ Tshuaj Siv Tshuaj (raug, wt%)
| Lub ntsiab | Cov ntsiab lus (Max, tshwj tsis yog ntau yam teev) |
|---|---|
| C (carbon) | Tsawg dua los yog sib npaug0.12% |
| Si (silicon) | 0.10–0.50% |
| Mn (manganese) | 0.80–1.25% |
| P (phosphorus) | Tsawg dua los yog sib npaug0.08% (Txhim kho corrosion tsis kam) |
| S (Sulphur) | Tsawg dua los yog sib npaug0.030% |
| CU (Tooj) | 0.25–0.55% (Qhov tseem ceeb rau huab cua) |
| CR (chromium) | 0.40–0.80% |
| Ni (npib tsib) | Tsawg dua los yog sib npaug rau 0.65% |
| Lwm tus (v, ti, thiab lwm yam) | Yeem rau cov qoob loo nplej |
Cov Lus Tseem Ceeb:
Ntau MN & CuTshaj li S355 steels →zoo dua corrosion tsis kam.
LAS S & P → zoo weldability thiab tawv.
2. Kev sib piv nrog cov hlau zoo sib xws
| Teem nqi | Lub hom phiaj | Yield zog (mpa) | Kev Cuam Tshuam Cuam Tshuam. | Qhov tseem ceeb sib txawv |
|---|---|---|---|---|
| S355j2g1g1w (en 10155) | En 10155 | Ntau dua los yog sib npaug rau 355 | -20 degree | Zoo rau cov qauv huab cua |
| S3555J0WP (Corten B, EN 10025-5) | EN 10025-5 | Ntau dua los yog sib npaug rau 355 | 0 Qib | Tsawg me ntsis kev cuam tshuam nyuaj |
| S355J2WP (EN 10025-5) | EN 10025-5 | Ntau dua los yog sib npaug rau 355 | -20 degree | Zoo ib yam li S3555j2G1w, tab sis cov qauv sib txawv |
| ASTM A588 Qib A / B | ASTM | Ntau dua los yog sib npaug rau 345 | -20℃rau -40 degree | Peb sib npaug, cov kev cai uas yuav tsum muaj |
3. Cov ntawv thov tseem ceeb
Txuas hniav & txoj kev loj(Vim yog corrosion tsis kam).
Cov Cuab Yeej Archades & Duab puab(xeb kev xav tau).
Kev Hloov Kho Cov Tshuab & Offshore Platforms(harsh ib puag ncig).
Railway Wagons & Cov Thawv Thauj Khoom(Lub peev xwm nyob rau hauv cov chaw ntub dej).
4. Weldability & Machinability
Hwj txwv
Zoo WeldabilityNrog rau cov hau kev (SMAW, MIG, TIG).
Preheating(100-150 degree) tej zaum yuav tsum muaj rau cov ntu tuab kom tsis txhob tawg.
Cov Ntawv Pom Zoo Cov Hluav Taws Xob: Cov Hom Hydrogen ntau (E7018, E71T-1).
Luam ntawv
Moderate Machinability(zoo ib yam li S355 tus hlau).
Txiav cov cuab yeej: SivCarbide lossis Coated Cov Cuab Yeejrau lub neej zoo dua.
Txiav Ceev:
Txoj siav: 80-120 m / min (carbide).
Kev drilling: 20-30 m / min (hss).
5. Qhov zoo dua tus qauv qauv qauv hlau
Zoo tshaj corrosion Kuj(txo cov nqi txij nkawm).
Siab zog-rau-qhov hnyav piv(Zoo rau load-cov kabmob qauv).
Aesthetic xeb tsos(nrov nyob rau hauv niaj hnub architecture).
Zoo Weldability & Formability(haum rau fab).
