TusVuam kev ua haujlwm ntawm S355J0WP Weathering HlauFeem ntau yog qhov zoo, tab sis nws yuav tsum muaj kev ceev faj tshwj xeeb vim nws cov khoom siv tshwj xeeb (CU, P, CR) thiab qhov yuav tsum tau khaws nws corrosion-resistant cov khoom. Hauv qab no yog cov ncauj lus kom ntxaws tshuaj xyuas ntawm nws cov hau kev zoo, pom zoo, thiab cov kev sib tw:
1. Weldability Txheej txheem cej luam
S3555j0wp yog cais raws liyooj yim weldablenyob rau hauv cov qauv ntawm cov qauv, tab sis nwssiab dua phosphorus (p) thiab tooj (CU) cov ntsiab lusMuaj peev xwm pose kev pheej hmoo yog tias tsis tswj tau zoo:
Carbon sib npaug (CEV): Feem ntau ~ 0.35-0.45 (moderate kev ua kom muaj kev kis tau txias).
Preheating: Often required for thick sections (>15-20 mm) kom tsis txhob muaj hydrogen-inducts cracking.
2. Kev Pom Zoo Vuam Txoj Kev
| Txojkev | Rau haum | Sau ntawv |
|---|---|---|
| Cov thaiv hlau arc vuam (smaw / mma) | Zoo | Siv cov hluav taws xob tsawg-hydrogen) (piv txwv li, E7018-W). |
| Roj Hlau Hlau Arc Vuam (Gmaw / Mig) | Zoo tshaj | Nyiam rau cov khoom lag luam; Siv AR / Kev sib xyaw. |
| Flux-cored arc vuam (FCaw) | Zoo | Kev tiv thaiv tus kheej lossis cov pa thaiv cov ntaub thaiv npog. |
| Tungsten Inert Roj (GTaw / TIG) | Zoo tshaj | Rau cov qauv siv nyiaj ua ntej; zoo ua tiav. |
| Submerged Arc Vuam (pom) | Txwv | Kev pheej hmoo ntawm cov lus tawm sib txawv ntau dhau; Siv ceev faj. |
3. Cov kev sib tw & kev daws teeb meem
a. Txias tawg kev pheej hmoo
Kev kom: Cov ntsiab lus p ntsiab lus siab yuav nce kev ua tau zoo.
Lus teb:
Kev sivCov hluav taws xob qis-hydrogen(piv txwv li, aws E7018-W).
Ua ntaub ntawvPreheat (100-150 degree)rau cov ntawv tuab.
Kev tswj hwmSib txuam Kub(max 250 degree).
b. Poob ntawm corrosion tsis kam nyob rau hauv weld cheeb tsam
Kev kom: Alloying ntsiab (Cu, CR) yuav oxidize lossis cais.
Lus teb:
Kev sivHuab cua huab cua-resistant fither(piv txwv li, Aws E70s-3 nrog cu / cr phim).
Zam kev zam dhau los ntawm cov neeg lim dej uas tsis yog huab cua.
c. Porosity (vim yog tooj liab segregation)
Kev kom: CU tuaj yeem ua daim ntawv tsawg-yaj-pointes.
Lus teb:
Txhim kho cov lus qhia tshav kub kub (0.5-2.0 kj / mm).
Huv huv thaj chaw kom huv (tshem tawm mill nplai / xeb).
4. Kev xaiv cov khoom siv
| Muab tub lim hom | Lub hom phiaj | Sau ntawv |
|---|---|---|
| Cov Hluav Taws Xob (SMAW) | Aws 7018-w | Ntais ntawv pib corrosion tsis kam. |
| MIG HLAU (GMAW) | Aws Er70s-6 | Ntxiv CU / CR yog xav tau rau Weld Polity Permity. |
| Flux-cored hlau (FCAW) | AWS E71T-1C / J | Kev xaiv tus kheej cov kev xaiv muaj. |
Tsab ntawv: Fillers yuav tsum ua kom phimCorrosion Kev Ua Haujlwmntawm s35555j0wp. Qee cov ntawv thov yuav xav tauKev sib caisNrog ntau dua-alloy fitters (piv txwv li, 3% ni hom rau cov chaw hnyav).
5. POST-WELD txiav txim siab
Tom qab weld kev kho cua sov (pwht): Tsis tshua muaj xav tau rau cov ntu nyias; Tej zaum yuav raug siv rau cov ntaub tuab nqa los daws kev ntxhov siab.
Nto Xov Xwm:
Tso cai rau ntuj muaj xeb patina los ua (ua kom ntseeg tau weld thaj chaw sib xyaw ua ke).
Yog tias yuav tsum tau pleev xim, sivHuab cua hluav taws xob-resistant txheej.
Kev kuaj xyuas:
Zas cenetrant (PT) lossis Ultrasonic (UT) xeem rau cov pob qij txha tseem ceeb.
6. Kev ua tau zoo ntawm welded pob qij txha
Corrosion Kuj: Weld hlau yuav tsum phim cov hlau sib txuas; Tsim nyog rau kev xaiv ua kom muaj kev vam meej.
Cov Khoom Siv Neeg Kho Tshuab:
Lub zog tensile: Welds feem ntau ua tau los yog tshaj S355j0wp's 355 mpa kom muaj zog.
Kev Cuam Tshuam: Charpy V-Motch muaj nuj nqis yuav tsum tau kuaj ntawm kev pabcuam kub (piv txwv li, -20 degree).
