1.What yog hom ntawm kev sib kis degree?
Residual grease / emulsion
Tau qhov twg los: Stamping roj, tiv thaiv xeb roj, txiav cov kua tsis ntxuav kom huv si
Cov Cuab Yeej: Thaum Lub Caij Kub Kub Galvanizing (≈450 degree), grease carbonizes → cov carbonizes → cov roj ntsha yog tsim los ua kom tawg los ntawm zinc txheej. Daim Ntawv Teev Npe: Muaj cov carbides dub nyob rau sab hauv phab ntsa ntawm npuas, feem ntau faib rau ntawm lub punching thiab khoov cov npoo
Rust Khoom
Tau qhov twg los: tsis muaj kev kho mob ua ntej, seem muaj xeb
Cov yam ntxwv: npuas yog cov plaub ya ri, nrog cov xeb liab-xim av
ADHERENS DUA
Tau qhov twg los: Rhiav plua av, vuam slag, sib tsoo cov lus
Cov nyhuv: tabkaum txoj kev sib raug zoo ntawm zinc-hlau alloy txheej → cov roj hauv zos
2.Qhov dab tsi yog cov xwm txheej uas tswj kev tswj tsis ua?
Cov kab mob siab ntau dhau, txawv txawv plating flux, tswj zinc daws teeb meem
3.Qhov dab tsi yog sab hauv kev tsis meej ntawm substrate?
Hlau Phaj Inclusions
Tau qhov twg los: Steelmaking deoxidizer residue
Cov yam ntxwv: npuas yog ntom thiab uniform nyob rau hauv loj
Grain Cregration
High-risk steel: boiling steel containing P>0.03% or S>0.025%
Mechanism: Kub-Kub Vaporization ntawm Cov Ncuav Ciaj ciam cuam Ciam Cuam Tshuam → Ua Rau Bigared Npuas
4.What cawv ua cov txheej txheem ib puag ncig muaj?
Kev ua haujlwm ntub dej ua haujlwm
Tus txheeb ze cov av noo> 85%: Hlau phaj nqus noo noo → Chav Chav Nrhiav tau tam sim ntawd thaum nkag mus rau Zinc Lauj
Kev daws: Ntxiv infrared kom qhuav (120 ~ 150 degree) hauv thaj chaw preheating
Zinc Ua Kua Hlau Oxidation
Flex flexas fluction> ± 10 degree: Rov ua dua oxidation / tawg ntawm zinc kua dej → Cua yog kos rau hauv
5.Qhov dab tsi daws?
Pretricusment txhim kho
Peb-kauj ruam tu txoj kev:
Alkaline Degreeze → Hydrochloric acid pickling → electrolytic activation
Kev tswj hwm ya raws: compressed cua chimging + 120℃kub cua kom qhuav
Steel puag yog tus nyiam
Aluminium tua cov hlau (als> 0.015%) tau xaiv los hloov cov hlau npau
Silicon cov ntsiab lus tswj: Si tsawg dua lossis sib npaug rau 0.03% lossis SI ntau dua lossis sib npaug rau 0.20%
Kev Kho Mob Tom Qab Plating
Cov thaj chaw me me: Drilling tso huab cua (φ1mm)
Kev Txhaj Tshuaj Ntawm Epoxy Zinc Primeter (muaj 96% zinc hmoov)
Nto scraping thiab tha xim tom qab atomic weety
Thaj chaw loj tsis ua haujlwm:
Zinc Stripping thiab rov plating (hydrochloric acid immersion txoj kev)