Q345B thiab Q355B steel yog hom qis-alloy high-strength steel qauv, ob qho tib si muaj qee qhov kev sib piv hauv qab no:
- Tshuaj muaj pes tsawg leeg
Cov ntsiab lus carbon: ob qho tib si cov ntsiab lus carbon tsawg, feem ntau qis dua 0.2%. Tab sis tus nqi tshwj xeeb yuav txawv me ntsis, feem ntau hais lus, qhov cuam tshuam ntawm kev ua tau zoo tsis yog qhov tseem ceeb.
Manganese cov ntsiab lus: Q355B manganese cov ntsiab lus yuav siab me ntsis siab dua Q345B, manganese pab txhim kho lub zog thiab toughness ntawm hlau.
Lwm yam alloying ntsiab: tag nrho cov muaj ib tug me me ntawm silicon, vanadium, niobium thiab lwm yam alloying ntsiab, ua lub luag hauj lwm nyob rau hauv refining lub grain, txhim kho lub zog thiab hais txog.
- Mechanical Properties Strength:
Q355B yield zog thiab tensile zog yog me ntsis siab dua Q345B. Q355B yield zog feem ntau yog siab tshaj 355MPa, Q345B tawm los zog yog feem ntau siab tshaj 345MPa. Q355B yield zog yog feem ntau siab tshaj 355MPa, Q345B tawm los lub zog yog feem ntau siab tshaj 345MPa, uas ua rau Q355B zoo dua nyob rau hauv ib co ntawm cov yam ntxwv Cheebtsam nrog siab zog yuav tsum tau.
Toughness: ob leeg muaj zoo toughness, nyob rau hauv qis kub tseem muaj peev xwm tuav ib tug tej yam kev cuam tshuam toughness. Txawm li cas los xij, hauv kev siv tshwj xeeb ntawm ib puag ncig, tej zaum yuav yog vim cov txheej txheem tsim khoom thiab kev kho cua sov thiab lwm yam.
Vuam kev ua tau zoo: txhua yam muaj kev vuam zoo, tuaj yeem txuas nrog ntau txoj kev vuam. Tab sis nyob rau hauv cov txheej txheem welding yuav tsum tau them sai sai rau kev tswj ntawm welding tsis kom tsis txhob vuam tsis xws luag.
- Daim ntawv thov
Lub tsev qauv: yog dav siv nyob rau hauv lub tsev, xws li steel qauv nroj tsuag, txuas hniav, high-sawv vaj tse, thiab lwm yam. Q355B vim muaj zog ntau dua, yuav siv tau los tiv thaiv loads ntau dua ntawm cov khoom siv.
Machinery manufacturing: nyob rau hauv lub teb ntawm machinery manufacturing, nws yuav siv tau los tsim cranes, mining machinery, siab hlab ntsha thiab lwm yam. Raws li cov kev xav tau ntawm cov cuab yeej sib txawv, xaiv cov hlau tsim nyog.
Shipbuilding: nyob rau hauv shipbuilding, ob lub steels yuav siv tau rau hull qauv thiab ib co neeg kho tshuab qhov chaw.
- Nqe
Feem ntau, tus nqi ntawm Q355B yuav siab dua me ntsis Q345B, uas yog vim qhov sib txawv ntawm nws cov tshuaj muaj pes tsawg leeg thiab kev ua haujlwm. Tab sis tus nqi kuj yuav cuam tshuam los ntawm kev ua lag luam thiab kev xav tau, cov tuam ntxhab thiab lwm yam.
