S235J2W steel phaj yog European qauv qauv steel phaj nrog siab yield zog thiab zoo atmospheric corrosion kuj. Nws ua raws li European tus qauv EN 10025-5, thiab tus lej sib raug yog 1.8961.
S235J2W steel phaj siab lub teeb weathering steel phaj txiav S235J2W European txheem S355J2W steel phaj weathering steel phaj, European txheem alloy steel phaj txhim kho cov kev ua tau zoo ntawm cov qauv thiab ncua kev pab cuam lub neej ntawm cov qauv, thiab yuav siv tau los ua ntau yam qauv uas ua hauj lwm nyob rau hauv atmospheric ib puag ncig thiab corrosive gases thiab kua. S235J2W feem ntau yog siv los ua txoj kev txuas hniav thiab kev tsheb ciav hlau txuas hniav (nrog rau cov choj hla hiav txwv) nrog cov qauv riveted thiab bolted.
Cov tshuaj muaj pes tsawg leeg ntawm S235J2W steel phaj feem ntau suav nrog carbon, silicon, manganese, phosphorus, sulfur thiab lwm yam khoom. Ntawm lawv, cov ntsiab lus carbon yog li 0.16%-0.24%, cov ntsiab lus silicon yog li 0.15%-0.4{{1{{ 14}}}}%, cov ntsiab lus manganese yog li ntawm 0.45%-0.65%, cov ntsiab lus phosphorus tsis siab tshaj 0.04%, thiab cov ntsiab lus sulfur tsis siab tshaj 0.05%. Kev sib xyaw ua ke ntawm cov ntsiab lus no ua rau S235J2W steel phaj muaj zog ntau dua thiab zoo dua plasticity thiab toughness.
Cov ntsuas kev ua tau zoo ntawm S235J2W steel phaj suav nrog lub zog tensile, yield zog, elongation, cheeb tsam txo thiab hardness. Ntawm lawv, lub zog tensile tsis tsawg dua 440MPa, lub zog tawm los tsis tsawg dua 235MPa, qhov elongation tsis tsawg dua 22%, thiab thaj tsam shrinkage tsis tsawg dua 50%. Tib lub sijhawm, qhov nyuaj ntawm S235J2W steel phaj yog hais txog 137-217HBW, uas tuaj yeem ua tau raws li cov khoom siv hardness.
S235J2W steel phaj feem ntau xav tau kev kho cua sov los txhim kho nws cov qauv thiab kev ua haujlwm. Cov kev kho cua sov feem ntau muaj xws li normalizing, tempering, thiab lwm yam. Normalizing kev kho mob tuaj yeem kho cov qauv tsim thiab txhim kho cov khoom siv kho kom zoo thiab lub zog ntawm cov phaj steel. Tempering kev kho mob tuaj yeem txhim kho qhov ruaj khov thiab qaug zog ntawm cov hlau phaj.
Feem ntau, S235J2W steel phaj yog cov qauv hlau phaj uas muaj lub zog muaj zog thiab zoo atmospheric corrosion kuj. Nws yog dav siv hauv kev tsim kho, tshuab, tsheb thauj mus los thiab lwm yam. Thaum xaiv siv S235J2W steel phaj, xaiv cov khoom tsim nyog thiab kev ua haujlwm yuav tsum tau ua raws li cov ntawv thov tshwj xeeb thiab cov kev xav tau los xyuas kom meej tias nws tuaj yeem ua tau raws li qhov yuav tsum tau ua thiab tswj kev ua haujlwm zoo thaum siv. Nyob rau tib lub sijhawm, thaum ua tiav thiab siv, nws tseem yuav tsum tau them sai sai rau kev kho cua sov kom tsim nyog thiab kev kho saum npoo ntawm cov hlau phaj kom paub meej lawv cov peev xwm ua tau zoo thiab txuas ntxiv lawv lub neej kev pab cuam.
