CortenB steel phaj yog hom huab cua-resistant steel phaj, tseem hu ua ASTM A588 steel phaj. Nws yog cov hlau tsis tshua muaj zog uas muaj cov tshuaj lom neeg tshwj xeeb, feem ntau muaj cov ntsiab lus xws li hlau, carbon, silicon, manganese thiab tooj liab. Tsis tas li ntawd, CortenB steel phaj kuj muaj me me ntawm phosphorus, sulfur, npib tsib xee thiab chromium.
Weathering steel yog ib hom hlau uas muaj huab cua tsis zoo. Piv nrog cov pa roj carbon zoo tib yam, CortenB steel phaj muaj kev tiv thaiv corrosion zoo heev thiab tuaj yeem tiv taus corrosion thiab oxidation nyob rau hauv huab cua puag ncig. Lub cev oxide txheej nws ua rau ntawm qhov chaw tiv thaiv kev xeb ntxiv, yog li kev tiv thaiv txheej tsis tas yuav tsum tau ua. Tsis tas li ntawd, CortenB steel phaj kuj muaj lub zog siab thiab kev ua haujlwm vuam zoo, ua rau nws siv dav hauv kev tsim kho, txuas hniav, nkoj thiab lwm yam.
Nws yuav tsum raug sau tseg tias CortenB steel daim hlau muaj cov yam ntxwv sib txawv ntawm cov hlau zoo tib yam. Vim muaj cov txheej txheem oxide nyob rau ntawm nws qhov chaw, nws yuav siv sij hawm los ntawm cov xim liab-xim av lossis tooj liab-xim, muab lub tsev lossis cov qauv tsim tshwj xeeb.
CortenB steel phaj ntau lawm tshuab thiab txheej txheem:
Kev tsim cov thev naus laus zis thiab txheej txheem ntawm CortenB steel phaj feem ntau suav nrog cov kauj ruam hauv qab no:
1. Kev npaj cov khoom siv raw: xaiv cov ntaub ntawv zoo, xws li hlau ore, carbon, silicon, manganese, tooj liab thiab lwm yam alloying ntsiab.
3. Melting: Muab cov ntaub ntawv raw rau hauv qhov cub kub kub kom yaj, kom ntseeg tau tias tag nrho cov khoom sib xyaw kom zoo.
4. Nruam casting: Cov hlau molten yog poured rau hauv lub nruam casting tshuab thiab tsim mus rau hauv ib tug tas mus li billet los ntawm txias thiab crystallization txheej txheem.
5. Rolling: Lub billet yog pub rau hauv dov zeb, thiab tom qab ntau dhau ntawm dov, nws maj mam ua thinner thiab mus txog qhov yuav tsum tau specifications thiab ntau thiab tsawg.
6. Kev ua kom txias: Cov phaj hlau yob tau nrawm nrawm los ntawm cov cuab yeej txias kom kho nws cov qauv sab hauv thiab lub cev.
7. Txiav thiab flattening: Txiav thiab flatten lub txias steel phaj raws li xav tau kom nws qhov ntev ntau meej.
8. Kev kho deg: Qhov txawv ntawm CortenB steel phaj yog tias nws muaj txheej tshwj xeeb oxide ntawm nws qhov chaw. Txhawm rau tsim cov txheej txheem oxide tshwj xeeb no, cov phiaj hlau feem ntau tau txais kev kho mob tshwj xeeb, suav nrog pickling, sandblasting lossis sib tsoo.
9. Kev soj ntsuam zaum kawg: Ua qhov kev tshuaj ntsuam xyuas zaum kawg ntawm cov hlau phaj, suav nrog kev tshuaj xyuas cov tsos, qhov loj me, tshuaj lom neeg muaj pes tsawg leeg thiab lub cev muaj zog.
10. Ntim thiab xa khoom xa tuaj: CortenB steel daim hlau uas tau dhau qhov kev tshuaj xyuas yuav raug ntim thiab npaj rau kev xa khoom.
Cov saum toj no yog cov txheej txheem ntau lawm thiab txheej txheem ntawm CortenB steel phaj nyob rau hauv ib txwm muaj xwm txheej. Cov tuam txhab sib txawv tuaj yeem sib txawv raws li lawv tus kheej cov cuab yeej siv thiab thev naus laus zis, tab sis tag nrho cov txheej txheem thiab cov kauj ruam feem ntau zoo sib xws.
Kev piav qhia ntawm cov tshuaj muaj pes tsawg leeg thiab txhua yam khoom ntawm CortenB steel phaj
Cov tshuaj muaj pes tsawg leeg thiab txhua yam khoom ntawm CortenB steel phaj yog raws li hauv qab no:
chemical muaj pes tsawg leeg:
- Cov pa roj carbon (C): 0.12%-0.16%
- Silicon (Si): 0.30% -0.50%
- Manganese (Mn): 0.25%-0.50%
- Phosphorus (P): Tsawg dua lossis sib npaug rau 0.030%
- Sulfur (S): Tsawg dua lossis sib npaug rau 0.030%
- Chromium (Cr): 0.40%-0.65%
- Nickel (Ni): Tsawg dua lossis sib npaug rau 0.40%
- Copper (Cu): 0.25%-0.40%
- Vanadium (V): 0.02%-0.10%
Mechanical Properties (tus nqi ib txwm):
- Tawm Zog: Ntau dua lossis sib npaug rau 345 MPa
- Tensile Strength: Ntau dua lossis sib npaug ntawm 485 MPa
- Elongation: Ntau dua lossis sib npaug li 21%
-Impact Toughness: Ntau dua lossis sib npaug rau 34J
Nws yuav tsum raug sau tseg tias cov txiaj ntsig no tsuas yog sawv cev ntawm cov khoom ntiag tug ntawm lub cev thiab cov txiaj ntsig tshwj xeeb yuav txawv raws li cov khoom tsim khoom thiab cov chaw muag khoom. Tsis tas li ntawd, thaum siv CortenB steel daim hlau, cov khoom siv tshwj xeeb thiab cov qauv yuav tsum tau ua raws, thiab cov ntaub ntawv tsim nyog thiab cov kev txwv yuav tsum raug xaiv raws li cov kev xav tau tshwj xeeb.
