Dab tsi yog cov qauv kev xaiv rau Q355 steel phaj hauv loj -span steel qauv?
Ua ntej qib Q355D/E kom ntseeg tau tias qis -kub toughness thiab qaug zog tiv thaiv; siv Z25 / Z35 qib rau cov phaj tuab; tswj qhov dav -rau-thickness ratio ntawm tus ntoo khaub lig-section kom tau raws li qhov yuav tsum tau muaj kev ruaj ntseg.
Dab tsi yog txoj kev txiav rau Q355 daim hlau, thiab dab tsi yog qhov ceev faj?
Txoj kev txiav: nplaim taws txiav, plasma txiav, laser txiav.
Lus Cim: Tshem tawm cov roj thiab xeb ua ntej txiav; tswj kev txiav ceev thiab kub kom txo tau cov cua sov- thaj tsam cuam tshuam; tuab daim hlau yuav tsum tau bevel thiab tshem tawm oxide nplai tom qab txiav.
18. Dab tsi yog cov txheej txheem rau kev ua haujlwm txias (khoov, shearing) ntawm Q355 daim hlau?
Cold bending: 180° cold bending, the bending mandrel diameter is adjusted according to the plate thickness (t≤16mm, d=3t; t>16mm, d=4t), tsis muaj kab nrib pleb tom qab khoov.
Shearing: Tsis txhob ua haujlwm txias dhau los tiv thaiv kev ua haujlwm tawv thiab micro- tawg; tuab daim hlau xav tau ntug sib tsoo tom qab shearing.
19. Dab tsi yog qhov sib txuam vuam khoom siv rau vuam Q355 daim hlau?
Electrodes: E50 series (E5015, E5016); Vuam hlau: ER50-6; Flux: HJ431, sib piv lub zog ntawm Q355.
20. Preheating thiab interpass kub tswj cov qauv rau vuam Q355 daim hlau?
Plate thickness ≤25mm: Preheating not required; 25-40mm: Preheat to 80-120℃; >40mm: Preheat rau 100-150 degree.
Interpass kub: 100-200 degree. Tsis txhob overheating lossis undercooling kom txo cov kev ntxhov siab thiab tawg.