1. Microstration sib txawv (dhau ntawm cov ntsiab lus alloy)
S355K2W: Cov neeg tsim khoom siv feem ntauKev tswj dov (CR) lossis li qub processes to refine its microstructure. These methods create a uniform, fine-grained matrix dominated by ferrite and pearlite, with minimal hard, brittle phases (e.g., martensite or bainite). Fine grains act as "barriers" to crack propagation during impact, as cracks require more energy to move across grain boundaries. For thicker plates (>50 hli), qee qhov chaw tsim khoom kuj sivThermo -} i} Txhua Yam Kev Tswj (TMCP)Txhawm rau txuas ntxiv cov nplej ua kom zoo, ua kom muaj kev sib xws txawm nyob hauv seem loj.
A588: Cov txheej txheem ntau lawm sib txawv sib txawv. Thaum Hwm A588 cov qib yuav siv cov kev siv hluav taws xob zoo sib xws, muaj ntau tus qauv A588 tso siab rauCua Txias after hot rolling, which can result in slightly coarser grains-especially in thicker sections (>25mm). Coarser cov nplej txo lub peev xwm los nqus tej yam kev cuam tshuam lub zog, raws li cov kab nrib pleb tuaj yeem tawm tswv yim yooj yim dua. Tsis tas li ntawd, A588 yuav muaj cov nyiaj tsawg (theem nyuaj) hauv nws cov microstructure, uas tuaj yeem ua kom muaj kev kub ntxhov rau S355K2W's ferrite- hlaws seem.
2. Phaj thickness cuam tshuam rau kev sib txig sib txawv
S355K2W: EN 10025 -} 5 Qhia meej meej cov lus qhia tuab-cuam tshuam nrog cov qhab nia tab sis tseem nruj. Piv txwv li:
Cov phiaj tsawg dua lossis sib npaug rau 150mm: ntau dua lossis sib npaug rau 40 J ntawm -20 degree;
Plates >150 hli (txog 200 hli): ntau dua los yog sib npaug rau 35 J ntawm -20 degree.
Qhov no me me 5 {{- J tso ua kom sawv ua kom tuab txawm tias cov phiaj tuab tuav siab. Hauv kev xyaum, cov tuam ntxhab feem ntau yuav ua rau txo qis tsawg-tuab s355k2W daim hlau (100-150mm) nquag xeem ntawm 45-55 J ntawm -20 degree.
A588: ASTM A588 has looser thickness provisions. For plates >50 hli, tus qauv tsis nce kev cuam tshuam lub zog hluav taws xob kom them rau cov nplej zom, thiab qee cov neeg tsim khoom yuav pom kev tawv nqaij tawv nqaij poob qis. Piv txwv li, ib 100 hli {{}} bas fick A588 k}}}}
3. Kev Ntsuas Cov Lus Qhia Tshwj Xeeb (tsis yog lub zog, tab sis cov ntsiab lus ntsuas)
Qauv Txheej Txheem: Ob tus qauv ua rau kev sim ntsuas cov qauv txiav kom sib txuas rau cov kev coj ua (ntev) lossis txiav). Txawm li cas los xij, S35562W feem ntau yuav tsum tau mus kuaj cov ntawv tuab (ntau dua los yog sib npaug ntawm lub ntiaj teb kev sim rau cov phiaj xwm ntev ntev. Transverse kuaj feem ntau muaj 10-20% qis dua kev cuam tshuam lub zog tshaj li s355k2w 40 j (transverse {j (travers) yog qhov 27 j (longitudinal) hauv cov ntsiab lus.
Noch hom: Thaum ob leeg siv Charpy V - Ceeb toom (rau 10025 {8} {8} {8} {{ ASTM A588 tau muaj kev thev taus me ntsis, uas tuaj yeem ua rau muaj kev sib txawv me me hauv kev tshaj tawm lub zog S355K2W cov ntaub ntawv nyuaj dua rov ua dua.
4. Kev Pabcuam Ib puag ncig
Tsawg - kub qhov kub: S35562W tus qauv tsim ua ntej kev ua haujlwm ntawm - 20℃zoo li Central Europe lossis Adminion Tuam Tshoj), nrog kev hloov kho rau -40 degree. A588 qib B Cov hom phiaj -40℃tab sis nrog qis zog (18 j), uas tsis txaus rau cov ntawv thov kev ntxhov siab (piv txwv li, cov seismic thaj chaw) ntawm qhov ntsuas kub. Rau cov phiaj xwm nyob rau hauv thaj chaw uas lub caij ntuj no yuj, s355k2w lub zog dua (} J) muab kev nyab xeeb dua tiv thaiv brittle buffure.
Post - Weld Toub: Ob lub hlau siv hauv Welded qauv, tab sis S355k2w qis dua cov pa roj carbon ntau dua lossis sib npaug nrog 0.45% txo qhov kub thiab txias dua lossis sib npaug thiab brittleness tom qab vuam. Qhov no txhais tau tias S355K2W Weld pob qij txha khaws ntau dua cov tawv dua li A588's, tseem ceeb rau cov qauv zoo li cov choj uas muaj cov ntsiab lus muaj kev ntseeg siab.
5. Lub chaw tsim khoom tswj thiab xwm txheej
S355K2W: European thiab Top Thoob Ntiaj Teb Cov Neeg Tsim Khoom Siv Ntau zaus ua 100% cuam tshuam kev sim siab (batch {{{{}}}} To Twv cov npuaj). Qhov no ua kom muaj kev sib txawv tsawg kawg ntawm daim hlau.
A588: Qee qhov chaw tsim khoom siv "Ntau qhov kev sim" (kuaj 1 tons) hloov 100% kuaj 100% uas tuaj yeem nco cov phiaj xwm outlier nrog qis tawv. Ib qho ntxiv, qis- Tus nqi A588 tuaj yeem siv cov txheej txheem tsawg dua lossis cov txheej txheem txias, ua rau tsis sib xws microntructure thiab kev nruj.
