Q235D steel phaj yog ib yam ntawm cov hlau tsis tshua muaj hlau, muaj ib qho me me ntawm cov hlau alloy, xws li manganese, silicon, phosphorus, thiab lwm yam, thiab muaj lub zog zoo thiab cov yas zoo. Nws lub zog tawm los yog 235MPa, lub zog tensile yog 370-500MPa, thiab elongation yog 21-29%. Tsis tas li ntawd, Q235D steel phaj kuj muaj qhov zoo toughness thiab corrosion kuj, thiab tuaj yeem ua tau raws li ntau yam kev xav tau ntawm engineering.
Cov txheej txheem tsim khoom ntawm Q235D steel phaj feem ntau suav nrog steelmaking, dov thiab kho cua sov. Ua ntej ntawm tag nrho cov, cov txheej txheem steelmaking yog tsuas yog tshem tawm impurities thiab teeb meem cov ntsiab lus los ntawm molten hlau los xyuas kom meej lub purity thiab zoo ntawm cov hlau phaj. Thib ob, cov txheej txheem dov feem ntau yog tsim thiab ua cov hlau phaj tom qab steelmaking kom tau txais cov duab thiab qhov loj me. Thaum kawg, kev kho cua sov txuas feem ntau ua kom sov thiab txias cov phaj steel los txhim kho nws cov khoom siv kho tshuab thiab kev ua haujlwm.
Txhawm rau kom tus qauv tsim thiab siv Q235D steel daim hlau, peb lub teb chaws tau tsim cov qauv kev lag luam sib xws. Ntawm lawv, "GB/T 700-2006 Carbon Structural Steel" yog tus qauv uas yuav tsum tau ua raws li hauv kev tsim thiab siv Q235D steel daim hlau. Cov txheej txheem no qhia txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, qhov loj thiab cov duab ntawm Q235D steel daim hlau los xyuas kom meej qhov ruaj khov ntawm nws qhov zoo thiab kev ua haujlwm.
