Dacromet-Wokutidwa ndi Flange Bolts ndi Mtedza wa Flange

2026-10-29

1. Mawu Oyamba

Dacromet-Wokutidwa ndi Flange Bolts ndi Mtedza wa Flange

Mgwirizano uliwonse wa bawuti umakhala wamphamvu ngati mnzake wofooka kwambiri. Bawuti yamphamvu kwambiri yolumikizidwa ndi nati wamba wosatetezedwa imapanga a banja la galvanic, msampha wa dzimbiri, ndi kulephera kumunda kwamtsogolo. Nkhaniyi ikuwonetsa zofananira - Maboti a flange okhala ndi dacromet (maboti a hex okhala ndi flange yofunikira pansi pamutu) ndi Mtedza wa flange wokutidwa ndi Dacromet (mtedza wa hex wokhala ndi kolala yozungulira yozungulira) - ndikufotokozera chifukwa chake mamembala onse olumikizana ayenera kunyamula zokutira zomwezo za zinc-aluminium flake.

Kupaka kwa Dacromet - njira yopanda electrolytic zinc-flake yofotokozedwa ndi Mtengo wa ISO 10683 ndi Chithunzi cha ASTM F1136 - imapereka maola 700 mpaka 1,000 osakanizidwa ndi kupopera mchere (ASTM B117 utsi wopanda mchere, NSS) dzimbiri lofiira, mufilimu yopyapyala ya 8-12 μm, yopanda ayi hydrogen embrittlement chiopsezo. Amagwiritsidwa ntchito pa bawuti ndi nut, imateteza dongosolo lonse lomangirira: zomangira, nkhope za flange, ndi ulusi wonyamula katundu mkati ndi kunja.

2. Zigawo ziwiri

2.1 Hex flange mabawuti

Bawuti ya hex flange ndi bawuti yamutu wa hexagon yokhala ndi flange yozungulira yophatikizika (nkhope ya washer yomangidwa) pansi pamutu, yokhazikika ISO 4162 / DIN 6921 ndi GB/T 5789/GB/T 16674. Zosankha zamapangidwe zikuphatikizapo:

Small flange mndandanda- compact bearing diameter kwa malo otsekeka a bawuti;
Large (lonse) flange mndandanda- okhala ndi mainchesi pafupifupi 1.5 × d, omwe amachepetsa kuthamanga kwapamwamba pansi pamutu ndikuchepetsa kulowa muzinthu zofewa monga zotayira zotayidwa;
Flange yokhazikika- mano onyezimira pa flange pansi pomwe amaluma pamalo otsekeka, ndikuwonjezera kukana kudzimasula komwe kumapangitsa kugwedezeka popanda chochapira chotchinga chosiyana.

3. Chifukwa Chofananira Dongosolo Lofunika Kuwongolera Kuwonongeka

Bawuti yokhala ndi zinc-flake yomwe ikuyenda mu mtedza wopanda kanthu kapena wokutidwa ndi ma electro-plated imapanga a banja la galvanic: malo awiri osiyana pokhudzana ndi electrolyte (mvula, condensation, mchere wamsewu). Zochepa zolemekezeka pamwamba zimawononga makamaka, kupanga dzimbiri loyera (zinc oxidation mankhwala) ndipo pamapeto pake dzimbiri lofiira (base-steel corrosion) pamalo ovuta kwambiri - ulusi womwe umanyamula katundu. Kupaka bolt ndi nati ndi dongosolo lomwelo la Dacromet limafanana ndi kuthekera kwa dzimbiri ndikuchotsa mphamvu yoyendetsa galvanic.

Njira ya Dacromet imaphatikizapo kusakaniza kwa asidi ndipo palibe electrolytic panopa, kotero palibe atomiki wa hydrogen yomwe imalowetsedwa muzitsulo. Izi zimapangitsa kukhala chisankho chokhazikika pazitsulo zolimba kwambiri za flange ndi mtedza wa flange wa kalasi ya 10.9 ndi 12.9, pomwe kulephera kwa hydrogen embrittlement (HE) kwa ma electro-plated fasteners ndi chiopsezo cholembedwa.

4. Coating Performance Kufananiza

Makina okutira (bolt + nati, kalasi 8.8)	Kunenepa kwake	Kupopera mchere ku dzimbiri loyera	Kupopera mchere ku red rust (NSS)	Kuchuluka kwa haidrojeni
Electro-galvanized Zn5	5 mbm	≈ 24 h	≈ 72-96 h	Kuopsa kwakukulu
Electro-galvanized Zn12	12 mm	≈ 72h	≈ 192 h	Kuopsa kwakukulu
Mechanical galvanizing	25-40 mm	≈ 96h	≈ 400-500 h	Zochepa
Kutentha-kuviika kanasonkhezereka	45-85 m	—	≈ 720 h	Pansi; ulusi umafunikanso kugogoda, nati oversize
Dacromet DAC 320 (Kalasi 2)	8 mm	≈ 240 h	≈ 720 h	Pafupifupi palibe
Dacromet DAC 500 / wakuda	10-12 m	≈ 480 h	≈ 1,000 h	Pafupifupi palibe

Phindu linanso: mtedza wothira wothira uyenera kudulidwa mokulirapo, zomwe zimachepetsa kumeta ubweya wa mtedza, pomwe mtedza wokutidwa ndi Dacromet umasungabe muyezo. 6H kulekerera kwa ulusi ndi mphamvu zonse - filimu yopyapyala, yolimba imasunga ulusi wokwanira, kotero mabawuti ndi mtedza zimasonkhanitsidwa momasuka ndi kukangana kosasinthasintha ndipo ayi. kulira za malo ophimbidwa.

5. Mapeto

Maboti a flange okhala ndi dacromet ndi mtedza wa flange amapanga makina omangirira: mawonekedwe a flange amagawira katundu wocheperako, amatsitsa kugwedezeka, ndikuchotsa ma washer osiyana, pomwe zokutira zofananira za zinc-aluminium zimalepheretsa maanja, kusindikiza malo otsetsereka, kukana dzimbiri loyera, 7000000 imasunga zitsulo zamphamvu kwambiri zopanda hydrogen embrittlement. Lamulo limodzi lofunikira kwambiri likadali: konzani ma bolts ndi mtedza ngati njira imodzi yofananira, yotetezedwa ndi dzimbiri.

Palibe. Kenako.

Nkhani zaposachedwa