Dab tsi yog lub zog thiab tensile lub zog ntawm Q355 steel phaj?
A: Yield zog Rel≥355MPa (thickness≤16mm). Rau txhua qhov nce hauv thickness, lub zog tawm los me ntsis txo qis (piv txwv li, 16-40mm≥345MPa); Tensile zog Rm=470-630MPa.
Dab tsi yog qhov tseem ceeb ntawm cov tshuaj muaj pes tsawg leeg ntawm Q355 steel phaj?
A: Lub teb chaws tus qauv kev cai yooj yim (wt%): C≤0.20, Si≤0.55, Mn≤1.60, P≤0.035, S≤0.035; Alloying cov ntsiab lus tuaj yeem yog micro-alloyed (Nb/V/Ti), nrog rau tag nrho cov ntsiab lus ≤0.22%.
Dab tsi yog qhov sib txawv ntawm qhov yuav tsum tau ua rau cov qib zoo sib txawv (A-E) ntawm Q355 steel?
A: Qib A tsis muaj kev cuam tshuam rau kev xeem; Qib B yuav tsum muaj kev cuam tshuam lub zog ≥34J ntawm chav tsev kub (20 degree); Qib C xav tau ≥34J ntawm 0 degree; Qib D xav tau ≥34J ntawm -20℃; Qib E yuav tsum tau ≥34J ntawm -40 degree. Tag nrho cov qauv muaj V-notch.
Dab tsi yog qhov kev xa khoom ntawm Q355 steel phaj?
A: Lub sijhawm xa khoom yog kub- dov (HR). Tswj dov thiab normalized tej yam kev mob kuj muab tau raws li qhov kev thov. Qhov saum npoo tiav yog kub- dov pickled, tawv dub, los yog sandblasted kom tshem tawm xeb.
Dab tsi yog qhov hardness ntau ntawm Q355 steel phaj?
A: Lub Brinell hardness ntawm kub - dov hlau yog HB≤210, thiab cov hlau tsis zoo yog HB≤200. Thaum tsis muaj qhov tshwj xeeb hardness yuav tsum tau, yield / tensile lub zog yog qhov tseem ceeb qhov qhia tau.