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Kalasi 8.8 Dacromet Hex Bolt -IN 933 | ISO 4014 | Bolt ya Hexagon Yathunthu yokhala ndi Dacromet Anti-Corrosion Coating
2026-07-06
Gulu la 8.8 Dacromet DIN 933 hex bolt limaphatikiza mphamvu zamakina apakatikati ndi chitetezo chotsogola chamakampani. Chogwiritsidwa ntchito kwambiri muzitsulo zamapangidwe akunja, mphamvu zamphepo, zomangamanga za njanji, ndi kumanga mlatho, cholumikizirachi chimapereka magwiridwe antchito odalirika pansi pazovuta zachilengedwe - popanda chiwopsezo cha hydrogen embrittlement chogwirizana ndi njira zina zopangira ma electroplated.
Gawo 1 - Kumvetsetsa Gulu 8.8
Malinga ndi ISO 898-1, chizindikiro cha kalasi ya bolt chimakhala ndi manambala awiri olekanitsidwa ndi mfundo ya decimal. Kwa Gulu 8.8:
Nambala yoyamba (8): Imawonetsa 1/100 yamphamvu yokhazikika mu MPa - mwachitsanzo, mphamvu yocheperako = 800 MPa.
Nambala yachiwiri (8): Amasonyeza chiŵerengero cha mphamvu zokolola zochepa ku mphamvu yocheperako × 10 - mwachitsanzo, chiŵerengero cha zokolola = 0.80, kutanthauza mphamvu zochepa zokolola = 640 MPa.
Mechanical Properties
| Katundu | Mtengo | Standard | Njira Yoyesera |
| Mphamvu Zolimba (min.) | 800 MPa | ISO 898-1 | Tensile test |
| Kuchuluka kwa Zokolola (min.) | 640 MPa | ISO 898-1 | Tensile test |
| Umboni Wowonjezera Kupsinjika | 580 MPa | ISO 898-1 | Katundu wa umboni |
| Kuchuluka kwa Zokolola | 0.80 | ISO 898-1 | Kuwerengera |
| Kuuma (Vickers) | 245-335 HV | Mtengo wa ISO 6507 | Mayeso a Vickers |
| Kuuma (Rockwell) | 22-32 HRC | ISO 6508 | Mayeso a Rockwell |
| Elongation at Break (min.) | 12% | ISO 898-1 | Tensile test |
| Impact Toughness (min.) | 52 J @ -20 °C | ISO 898-1 | Charpy test |
Zomangamanga za Grade 8.8 zimapangidwa kuchokera kuzitsulo zapakati-carbon (mwachitsanzo, 45 # / SAE 1045) kapena zitsulo zotsika kwambiri (mwachitsanzo, 40Cr / SCM435) ndipo zimagonjetsedwa ndi kutentha ndi kutentha (Q & T) chithandizo cha kutentha kuti chikwaniritse mphamvu yofunikira. Kuphatikizika kwa mphamvu zolimba kwambiri komanso kuchuluka kwa zokolola zoyendetsedwa bwino kumapangitsa mabawuti a Giredi 8.8 kukhala odalirika pamalumikizidwe opangidwa kale.
Magawo Omwe Amagwiritsa Ntchito
Kupanga zitsulo: Zomangamanga zomangira mu mafelemu, matabwa, ma trusses (BS EN 14399 / ASTM A325-yofanana).
Zomangamanga: Kukongoletsa mlatho, njanji za crane, njanji zapamsewu waukulu, zolumikizira zowonjezera.
Mphamvu zongowonjezedwanso: Kulumikizika kwa ma turbine tower base base, zomangira za solar.
Makina: General-cholinga makina mafelemu, zipangizo zaulimi, kusamalira zinthu.
Zagalimoto (zosafunikira): Kuyika kwa chassis, thupi ndi chimango, zothandizira za injini.
Gawo 2 - DIN 933 Hex Bolt Standard
DIN 933 (Deutsches Institut für Normung, German Standards Institute) imatanthawuza zofunikira za dimensional ndi geometric pamabowuti a hexagon okhala ndi ulusi wokhotakhota wa metric pitch. Ngakhale idatsitsidwa kwambiri ndi ISO 4017 pamlingo wapadziko lonse lapansi, DIN 933 ikadali yodziwika bwino pakugula kwamakampani ku Europe ndi padziko lonse lapansi.
Zofunikira za DIN 933
Ulusi wonse: Bawutiyo imalumikizidwa ndi utali wake wonse wa shank - kukulitsa kulumikizana kwa ulusi ndi kugawa katundu.
Mutu wa hexagonal: Kukula kwapakatikati kwa ma flats kumalola kugwiritsa ntchito ma metric spanners ndi ma socket wrenches.
Ulusi wokulirapo: Metric coarse pitch (pa ISO 261) polumikizana mwachangu komanso kukana kumasuka ndikugwedezeka.
Dimensional tolerance: Mankhwala kalasi A (m ≤ 10d kapena ≤ 150 mm) ndi mankhwala kalasi B (zazikulu) pa ISO 4759-1.
DIN 933 Dimension Reference Table
Chizindikiro Cholembera
Maboti a DIN 933 Giredi 8.8 amalembedwa mutu ndi chizindikiro cha katundu "8.8" ndi chizindikiritso cha wopanga. Dacromet itakutidwa, chizindikiro chowonjezera kapena chizindikiritso chikhoza kuwonetsa chithandizo chapamwamba.
Gawo 3 - Chitetezo cha Dacromet Corrosion
Dacromet (yolembedwanso ngati Dacrotised kapena DACROMET®) ndi ukadaulo wopanda chromate, zinc-ndi-aluminium flake zochokera m'madzi zotengera madzi zomwe zidapangidwa ndi Diamond Shamrock Chemicals. Imapereka chitetezo chambiri chadzimbiri ndipo yakhala njira yabwino yopangira ma bawuti a Giredi 8.8 omwe amagwiritsidwa ntchito panja komanso mwankhanza.
Momwe Dacromet Imagwirira Ntchito
Chophimbacho chimakhala ndi zinc ndi ma aluminium flakes angapo omwe amalumikizana pamodzi ndi matrix a chromate-based binder matrix, omwe amaikidwa ndi dip-spinning ndikuchiritsidwa pafupifupi 300 °C. Ma microstructure osanjika amapangitsa njira yovutitsa kwa othandizira owononga, kupereka zotchinga komanso chitetezo cha nsembe (galvanic):
Chitetezo chotchinga: Zokhuthala, zophatikizika za flake zimatchinga chinyezi ndi ma chloride ma ion kuti asafike kugawo lachitsulo.
Chitetezo cha nsembe (galvanic): Zinc flakes ndi electrochemically yochepa kwambiri kuposa chitsulo; amawononga makonda, kuteteza zitsulo zowonekera pamalo odulidwa ndi malo owonongeka.
Kudzichiritsa nokha: Zinc corrosion mankhwala amasindikiza pang'ono zolakwika zazing'ono, zomwe zimatalikitsa moyo wachitetezo.
Zambiri Zogwirira Ntchito
| Katundu | Dacromet | Hot Dip Galvanizing | Zinc Electroplating | Phosphating |
| Kukaniza Kupopera Mchere | ≥ 480 h (angafikire 1000+ h) | 200-500 h | 96-120 h | <72h |
| Kupaka makulidwe | 6-10 μm | 50-100 µm | 5-15 μm | 5-15 μm |
| Kuchuluka kwa Hydrogen | Palibe (kuphika sikufunika) | Palibe | Kuopsa kwakukulu | Chiwopsezo chochepa |
| Kulekerera kwa Thread | Osakhudzidwa (malaya owonda) | Nthawi zambiri amakhudzidwa | Nthawi zambiri chabwino | Nthawi zambiri chabwino |
| Zogwirizana ndi RoHS / REACH | Inde (hexavalent-Cr-free) | Inde | Zimasiyana | Inde |
| Kugwiritsa Ntchitos | Mapangidwe akunja, nsanja yamphepo, mlatho | Kunja kolemera | M'nyumba / kuwala | M'nyumba |
Mayeso opopera mchere pa ISO 9227. Dacromet makulidwe ake: 6–10 µm. Zotsatira zimatha kusiyanasiyana malinga ndi momwe amapangira komanso njira yogwiritsira ntchito.
Miyezo Yogwiritsiridwa Ntchito & Mafotokozedwe
ISO 10683: Zopaka za zinc flake zosagwiritsa ntchito electrolytically zomangira.
EN ISO 10683: Kukhazikitsidwa kwa European ISO 10683.
ASTM F1136: Zinc/aluminium zoteteza dzimbiri zomangira zomangira.
VDA 235-104: Muyezo wamagalimoto aku Germany pa zokutira za zinc flake.
About Fujirui Metal — Professional Fastener Manufacturer & Exporter
Fujirui Metal imapanga ndi kutumiza kunja zomangira zolondola monga Giredi 8.8 / 10.9 / 12.9 hex bolts, DIN 933 full-thread bolts, DIN 931 partial-thread bolts, stud bolts, and fasteners custom. Njira zochizira pamwamba zikuphatikizapo Dacromet, Ruspert, hot-dip galvanising, ndi zinc electroplating. Zogulitsa zonse zimapangidwa motsatira miyezo ya ISO, DIN, ndi ASTM yokhala ndi satifiketi yoyeserera zinthu zonse (MTC).
