Q235 weldability?
A: Weldability zoo heev, cov ntsiab lus carbon tsawg, tsis tshua muaj siab hardening nyob rau hauv tshav kub- cuam tshuam cheeb tsam, haum rau ntau yam vuam txoj kev.
Cov txheej txheem welding feem ntau thiab cov khoom siv vuam?
A: Phau ntawv arc vuam: E4303 (J422), E4315 (J427)
Gas shielded vuam: ER50-6, ER49-1
Submerged arc vuam: H08A + HJ431
Puas yog Q235 vuam xav tau preheating?
A: For plate thickness ≤20mm and ambient temperature ≥5℃, no preheating is required; for thickness >20mm los yog tsawg kub, preheat rau 50-80 degree.
Cov khoom siv vuam dab tsi yog siv rau vuam sib txawv steels Q235 thiab Q355?
A: Xaiv cov khoom qis dua - qib, E43 series lossis ER49-1.
Dab tsi yog qhov tsis zoo ntawm kev vuam ntawm Q235 thiab lawv cov kev tiv thaiv? A: Porosity (kom qhuav cov welding pas nrig, ntxuav qhov chaw), slag inclusions (slag tshem tawm, kom zoo pas nrig tuav), deformation (tswj cua sov input).