Q355 steel kauj yog dab tsi?
Q355 yog qhov qis- alloy siab- lub zog steel raws li Suav teb tus qauv (GB/T 1591-2018). "Q" sawv cev rau lub zog tawm los; 355 txhais tau tias lub zog tawm los Ntau dua lossis sib npaug rau 355MPa rau lub thickness Tsawg dua lossis sib npaug rau 16mm, nrog lub zog tensile ntawm 470-630MPa. Nws muaj cov ntsiab lus microalloying xws li Nb thiab V, sib txuas lub zog siab, zoo toughness, thiab weldability.
Dab tsi yog qhov tseem ceeb ntawm Q355 steel kauj hauv kev lag luam tsheb?
Nws yog tsuas yog siv nyob rau hauv tsheb thauj khoom-cov kabmob cov qauv, chassis, thav duab, thiab lub cev muaj zog, hloov cov tsoos qis- lub zog steel kom ua tiav qhov sib npaug ntawm qhov hnyav thiab kev nyab xeeb.
Dab tsi yog qhov txawv ntawm Q355 steel kauj thiab Q235 steel kauj hauv kev siv tsheb?
Q355 muaj lub zog tawm los kwv yees li 52% siab dua Q235. Nyob rau tib lub zog, nws tuaj yeem ua rau nyias nyias thiab hnyav li 15%-20%, ua kom nws haum rau hnyav- lub luag haujlwm / lub teeb yuag automotive applications. Q235 feem ntau yog siv rau cov khoom uas tsis yog -load-bearing hniav.
Cov qib zoo ntawm Q355 steel coils yog dab tsi? Hom twg yog feem ntau siv hauv kev lag luam tsheb?
Nws muab faib ua qib B, C, D, thiab E, sib xws rau qhov sib txawv ntawm qhov kub thiab txias (qib B 20 degree, qib D -20 degree, qib E -40 degree). Kev lag luam tsheb feem ntau siv Q355B thiab Q355D, haum rau ob qho tib si ib txwm muaj thiab tsis tshua muaj kub.
Yuav ua li cas yog corrosion kuj ntawm Q355 steel coils? Nws puas xav tau kev kho mob ntxiv rau kev siv tsheb?
Ordinary Q355 muaj qhov zoo ntawm atmospheric corrosion tsis kam tshaj Q235 (20%-38% zoo dua), tab sis tsheb chassis/thav duab yuav tsum kub-dip galvanizing, electrophoresis, thiab tshuaj tsuag rau kev tiv thaiv corrosion. Huab cua-resistant Q355NH tuaj yeem txo cov nqi pleev xim.