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Dacromet Flange Bolts
2026-07-23 IB
Dacromet Flange Bolts
Anti-Corrosion Flange Fasteners nrog Zinc-Aluminium Flake Txheej
Dacromet flange bolts ua ke cov load-distributing flange taub hau tsim nrog Dacromet zinc-aluminium flake txheej. Lub flange tseem ceeb hloov lub tshuab ntxhua khaub ncaws, thaum Dacromet txheej muab 500-1,200 xuab moos ntawm ntsev tsuag tsis muaj hydrogen embrittlement - zoo tagnrho rau tsheb, kev tsim kho, thiab kev siv dej hiav txwv.
Ntu 1 - Flange Bolt
Lub flange ntsia liaj qhov rooj yog lub taub hau hex ntsia liaj qhov rooj nrog kev sib xyaw ua ke zoo li flange ntawm lub taub hau puag. Lub flange faib clamping load hla ib cheeb tsam dav, txo qhov siab ntawm qhov chaw thiab tiv thaiv kev puas tsuaj rau cov khoom sib txuas. Qhov no tshem tawm qhov xav tau ntawm lub tshuab ntxhua khaub ncaws, ua kom yooj yim sib dhos.
Cov yam ntxwv tseem ceeb
- Load faib: Flange kis clamping quab yuam, txo cov kabmob kev ntxhov siab txog li 50% piv rau cov qauv hex bolts.
- Anti-loosing: Serrated flange kev xaiv muab cov kev vibration ua haujlwm tsis muaj kev xauv lub tshuab ntxhua khaub ncaws.
- Qauv: DIN 6921 / ISO 4162 / GB / T 5787; M6-M20; Qib 8.8 thiab 10.9 rau ISO 898-1.
- Khoom siv: Cov pa roj carbon steel (Qib 8.8) lossis cov hlau tsis tshua muaj hlau (Qib 10.9), quenched thiab tempered.
Ntu 2 - Dacromet Txheej
Dacromet yog dej-raws li, tsis-electrolytic txheej ntawm overlapping zinc thiab txhuas flakes bonded los ntawm chromium tebchaw. Siv los ntawm dip-spin-kho cycles ntawm 280-300 ° C, nws muab peb-txheej corrosion tiv thaiv yam tsis muaj hydrogen embrittlement.
Mechanism tiv thaiv
- Kev tiv thaiv Sacrificial: Zinc flakes corrode nyiam los tiv thaiv hlau, txawm tias thaum txheej yog khawb.
- Lub cev barrier: Overlapping flakes thaiv cov dej noo, oxygen, thiab corrosive ions.
- Tshuaj Passivation: Chromium compounds qeeb zinc yaj thiab nws tus kheej kho micro-scratches.
Qhov Zoo Tshaj Plaws
- Tsis muaj hydrogen embrittlement: Cov txheej txheem tsis-electrolytic - muaj kev nyab xeeb rau Qib 8.8-10.9 siab zog bolts.
- Superior corrosion kuj: 500-1,200 teev ntsev tsuag (ISO 9227), 5-10x zoo dua zinc plating.
- Nyias & uniform: 4-10 µm khaws cov xov haum thiab flange geometry. Tsis xav rov tapping.
- Thaum tshav kub kub resistant & eco-phooj ywg: Ua haujlwm kub 250 ° C; Cr⁶⁺-dawb, RoHS / REACH raws.
Txheej sib piv
| Khoom | Dacromet | Zinc Plating | Kub-Dip Galv. |
| Salt Spray (hli) | 500-1,200 Nws | 96-240 : kuv | 300-1,000 |
| Hydrogen embrittlement | Tsis muaj | Risk (Gr. 10.9+) | Tsis muaj |
| Txheej Thickness | 4-10 µm | 5-25 µm | 45-85 µm |
| Xov Fit Impact | Tsawg kawg | Tsawg | Qhov tseem ceeb |
| Thaum tshav kub kub Resistance | 250 ° C | 200 ° C | 250 ° C |
| Qhov tshwm sim | Silver-grey, matte | Xiav-dawb | Bright / spangled |
Cov ntsiab lus
Dacromet flange bolts muab kev pom zoo ua ke ntawm kev ua haujlwm zoo thiab kev tiv thaiv corrosion. Lub flange tseem ceeb faib cov khoom thauj thiab ua kom yooj yim rau kev sib dhos, thaum Dacromet zinc-aluminium flake txheej xa 500-1,200 xuab moos ntawm ntsev tsuag tsis muaj hydrogen embrittlement. Cov fasteners no tau siv dav hauv tsheb, kev tsim kho, cua zog, thiab kev siv dej hiav txwv uas txhim khu kev qha clamping thiab kev ua haujlwm ntev ntev yog qhov tseem ceeb.
