Ki prensip seleksyon yo pou plak asye Q355 nan estrikti asye gwo -span?
Priyorite klas Q355D/E pou asire ke tanperati ki ba -rezistans ak rezistans fatig; sèvi ak klas Z25/Z35 pou plak pi epè; kontwole rapò lajè-a-epesè nan seksyon trans-pou satisfè kondisyon estabilite.
Ki metòd koupe pou plak Q355, e ki prekosyon yo ye?
Metòd koupe: koupe flanm dife, koupe plasma, koupe lazè.
Remak: Retire lwil sifas ak rouye anvan koupe; kontwole vitès koupe ak tanperati pou diminye zòn ki afekte chalè-; plak epè bezwen bizote epi retire echèl oksid apre koupe.
18. Ki kondisyon pwosesis pou travay frèt (kobe, taye) plak Q355?
Cold bending: 180° cold bending, the bending mandrel diameter is adjusted according to the plate thickness (t≤16mm, d=3t; t>16mm, d=4t), pa gen okenn fant apre koube.
Taye taye: Evite travay frèt twòp pou anpeche travay di ak mikwo-fant; plak epè bezwen kwen fanm k'ap pile apre taye.
19. Ki sa ki konsomables soude matche yo pou soude plak Q355?
Elektwòd: E50 seri (E5015, E5016); Fil soude: ER50-6; Flux: HJ431, matche klas fòs Q355.
20. Prechofaj ak estanda kontwòl tanperati interpass pou soude plak Q355?
Plate thickness ≤25mm: Preheating not required; 25-40mm: Preheat to 80-120℃; >40mm: Chofe a 100-150 degre.
Tanperati Interpass: 100-200 degre. Evite surchof oswa undercooling pou diminye estrès soude ak fann.