1. Kev qaug zog ua kom muaj zog hauv lub zog
Qaug zog muaj zog: Tsis kam mus rau cyclic chaw thau khoom uas ua rau tawg pib kev pib thiab kev hais tawm.
Tus cuam tshuam loj:
Cov khoom siv microstructure (Alloy muaj pes tsawg leeg, grain loj).
Cov xwm txheej saum npoo (tsis yog, roughness, corrosion pits).
Kev nthuav dav ib puag ncig (ya raws ib puag ncig, cov pa paug).
2. Qhov zoo ntawm Q355Nh hauv kev ua tau zoo
A. Tiv thaiv cov nyhuv patina
Tus kheej - tiv thaiv cov txheej xeb:
Q355 ua cov tuab tuabneeg tuab, ua rua patina ({feooh}
Qho kawg: Nyob rau hauvTemperate / Nroog Ib puag ncig, Q355Nws feem ntau cov khoom pov thawj10-20% Ntau Cov Neeg Qwj Qeeb TsegTshaj li cov xim pleev xim rau cov hlau (piv txwv li, q355b) tom qab patina stabilization.
B. Alloy Cov Nyiaj Pab
Tooj liab (Cu) thiab chromium (CR):
Txhim khu cov nplej ua kom zoo nkauj thiab txo qhov chaw nyob ib ntus raws li kev ntxhov siab cyclic.
Ncua kev pib pib los ntawm kev tawm tsam cov hauv zos corrosion.
3. Kev Txwv thiab Kev Pheej Hmoo
A. A. Harsh ib puag ncig
Nqaum / Muaj Chaw Nyob:
Chlorides lossis so₂ yuav ua rauzos pittingntawm Q355Nh ua ntej patina stabilizes, muaj peev xwm txo kev qaug zog hauv qab no uas yogPleev Xim Q355B.
Lus teb: Tsim nrog cov ntsiab lus muaj kev nyab xeeb ntau dua lossis siv cov txheej txheem tiv thaiv ntawm cov pob qij txha tseem ceeb.
B. Kev Tiv Thaiv Kev Tiv Thaiv Hlav / Welds
Welded pob qij txha:
Kev qaug zog ntawm welded Q355NH yog qhov zoo sib xws rau cov hlau zoo tib yam yog tias tsis muaj kev kho mob zoo thiab kev hloov pauv microstrendural).
Yam ua kom zoo dua: Grind Welds du thiab siv qis - hydrogen electrodes kom txo cov kev ntxhov siab.
4. Cov ntaub ntawv sib piv
| Yam tseem ceeb | Q355NH (Weathering Hlau) | Q355B (Qhov Nruab Nrab Hlau + Xim) |
|---|---|---|
| Tsis tau muaj cov hnoos qeev (huab cua) | Qaug zog: ~ 250 MPa (10⁷ Cycles) | Qaug zog: ~ 220 mpa (10⁷ Cycles) |
| Cov hnoos qeev (kt =3) | Qaug zog: ~ 120 MPa | Qaug zog: ~ 100 MPA |
| Ib puag ncig ib puag ncig | Yuav tsum tau saib xyuas; tej zaum yuav poob rau 80% ntawm hauv - huab cua ua haujlwm | Kev tiv thaiv xim ceev tswj hwm ~ 90% ntawm hauv - huab cua ua haujlwm |
5. Cov lus pom zoo tsim
Rau Cyclic Chaw thau khoom qauv(piv txwv li, choj, cranes):
Xum Q355Snh hauvTem temperate / inland ib puag ncigRau nws cov txij nkawm - tsaug zog dawb tsis muaj zog.
HauvNqaum|Muaj aones, qhia meejPleev Xim Q355Nhlossissiab dua -} alloy cov qib(piv txwv li, q355gnh nrog ni / cr boost) rau cov pob qij txha tseem ceeb.
Nto Kho:
Grind loj heev weldsthiabUa ntej - oxidizeTxhawm rau ua kom nrawm pata tsim thiab txo cov pitting thaum ntxov.
Qaug Qeeb:
CojIb puag ncig -}} kev sim rog rog(piv txwv li, ISO 1099) yog tias ntim cov khoom siv tau yooj yim lossis kev txhoj puab heev.
6. Tiag -} Ntiaj Teb Piv Txwv
Zhangjiakou choj (Suav teb):
Q355NH siv nyob rau hauv Girders pom tsis muaj nkees tawg tom qab 10 xyoo nyob rau hauv ib tug kub huab cua, thaum pleev xim rau cov hlau uas xav tau los tswj kev ua tau zoo.
Tag
Q355NH Feem Ntau Muajzoo dua qaug zog ua tau zoo tshaj li qub tus qauv steel hauv tsis -}}}}}}}}}}}}}}}}} {}} {agress} agon} ...} {agression ib puag ncigVim nws txoj kev tiv thaiv patina. Txawm li cas los xij, nyob rau hauvNqaum lossis cov chaw muaj kuab paug, nws tau txais kev tively tsis muaj peev xwm tshwj tsis yog kev txhawb nqa nrog kev hloov kho kev hloov kho (piv txwv, cov kab tiv thaiv ntawm Welds). Ib txwm ua qhov tseem ceeb:
Kev tshuaj tiv thaiv ib puag ncig(piv txwv li, alloy hloov kho tshiab rau cov thaj chaw hnyav).
Cov Tswj Xyuas Cov Qauv Zoo(Cov kev hloov pauv du, polished welds).
Ntev -} sij hawm xyuasrau cov khoom tseem ceeb.
