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Ite 8.8 Dacromet Hex Bolt –IN 933 | ISO 4014 | Okun Hexagon Bolt ni kikun pẹlu Dacromet Anti-corrosion Coating
2026-07-06
Awọn ite 8.8 Dacromet DIN 933 hex bolt daapọ alabọde-ga ẹrọ agbara pẹlu aabo ipata ile ise. Ti gba jakejado ni iṣẹ irin igbekale ita gbangba, agbara afẹfẹ, awọn amayederun oju-irin, ati ikole Afara, Fastener yii n pese iṣẹ ṣiṣe dimole ti o gbẹkẹle labẹ awọn ipo ayika ti o nbeere - laisi eewu embrittlement hydrogen ti o ni nkan ṣe pẹlu awọn omiiran elekitiriki.
Apá 1 - Oye ite 8.8
Gẹgẹbi ISO 898-1, yiyan kilasi ohun-ini ti boluti kan ni awọn nọmba meji ti o yapa nipasẹ aaye eleemewa kan. Fun Ipele 8.8:
Nọmba akọkọ (8): Tọkasi 1/100 ti agbara fifẹ ipin ni MPa — ie, agbara fifẹ to kere ju = 800 MPa.
Nọmba keji (8): Tọkasi ipin ti agbara ikore ti o kere ju si agbara fifẹ to kere ju × 10 — ie, ipin ikore = 0.80, itumo agbara ikore ti o kere ju = 640 MPa.
Darí Properties
| Ohun ini | Iye | Standard | Ọna Idanwo |
| Agbara Fifẹ (min.) | 800 MPa | ISO 898-1 | Idanwo fifẹ |
| Agbara ikore (min.) | 640 MPa | ISO 898-1 | Idanwo fifẹ |
| Ẹri Wahala Fifuye | 580 MPa | ISO 898-1 | Ẹru ẹri |
| Ipin Ikore | 0.80 | ISO 898-1 | Iṣiro |
| Lile (Vickers) | 245-335 HV | ISO 6507 | Vickers igbeyewo |
| Lile (Rockwell) | 22–32 HRC | ISO 6508 | Rockwell igbeyewo |
| Ilọsiwaju ni isinmi (min.) | 12% | ISO 898-1 | Idanwo fifẹ |
| Ipa lile (min.) | 52 J @ -20 °C | ISO 898-1 | Idanwo Charpy |
Ite 8.8 fasteners ti wa ni ti ṣelọpọ lati alabọde-erogba irin (fun apẹẹrẹ, 45# / SAE 1045) tabi kekere-alloy irin (fun apẹẹrẹ, 40Cr / SCM435) ati ki o ti wa ni tunmọ si quenching ati tempering (Q&T) itọju ooru lati se aseyori awọn ti a beere agbara profaili. Apapọ ti agbara fifẹ giga ati ipin ikore ti iṣakoso jẹ ki awọn boluti Ite 8.8 ni igbẹkẹle gaan ni awọn asopọ igbekale ti kojọpọ tẹlẹ.
Awọn aaye Ohun elo Aṣoju
Ikole irin: Boluti igbekalẹ ni awọn fireemu, awọn opo, trusses (BS EN 14399 / ASTM A325-deede).
Awọn amayederun: Decking Afara, Kireni afowodimu, opopona guardrails, imugboroosi isẹpo.
Agbara isọdọtun: Awọn asopọ ipilẹ ile-iṣọ tobaini afẹfẹ, awọn ẹya iṣagbesori oorun.
Ẹrọ: Awọn fireemu ẹrọ idi gbogbogbo, ohun elo ogbin, mimu ohun elo.
Ọkọ ayọkẹlẹ (kii ṣe pataki): Iṣagbesori ẹnjini, ara-si-fireemu, awọn atilẹyin jojolo engine.
Apá 2 - DIN 933 Hex Bolt Standard
DIN 933 (Deutsches Institut für Normung, German Standards Institute) n ṣalaye iwọn ati awọn ibeere jiometirika fun awọn boluti hexagon ti o ni kikun pẹlu awọn okun metric metric isokuso. Botilẹjẹpe o rọpo pupọ nipasẹ ISO 4017 ni ipele kariaye, DIN 933 wa sipesifikesonu ti o ga julọ ni Yuroopu ati rira ile-iṣẹ agbaye.
Awọn ẹya pataki ti DIN 933
Okùn kikun: Awọn boluti ti wa ni asapo pẹlú awọn oniwe-gbogbo shank ipari - mimu o tẹle adehun igbeyawo ati fifuye pinpin.
Orí mẹ́fà: Iwọn odiwọn iwọn-kọja-alapin ngbanilaaye lilo pẹlu awọn spaners metric boṣewa ati awọn wrenches iho.
Pipati okun ti o nipọn: Ipele isokuso metric (fun ISO 261) fun apejọ yara ati atako si loosening labẹ gbigbọn.
Ifarada ti iwọn: Ọja ite A (m ≤ 10d tabi ≤ 150 mm) ati ọja ite B (tobi titobi) fun ISO 4759-1.
DIN 933 Dimension Reference Table
Ṣiṣamisi Idanimọ
DIN 933 Ite 8.8 boluti ti wa ni aami-ori pẹlu aami kilasi ohun-ini "8.8" ati ami idanimọ ti olupese. Nigbati Dacromet-ti a bo, afikun siṣamisi tabi tag le tọkasi itọju dada.
Apá 3 - Dacromet Idaabobo Idaabobo
Dacromet (ti a tun kọ bi Dacrotised tabi DACROMET®) jẹ ọfẹ-chromate, zinc-ati-aluminiomu flake-orisun omi ti a bo imo-ero ni akọkọ ni idagbasoke nipasẹ Diamond Shamrock Kemikali. O pese idabobo ipata irubọ to dayato si ati pe o ti di itọju dada ti o fẹ julọ fun awọn boluti Ite 8.8 ti a lo ni ita ati awọn ohun elo agbegbe ibinu.
Bawo ni Dacromet Ṣiṣẹ
Ibora naa ni zinc agbekọja pupọ ati awọn flakes aluminiomu ti a so pọ nipasẹ matrix alasopọ ti o da lori chromate aijẹ-ara, ti a lo nipasẹ yiyi-dip ati imularada ni isunmọ 300 °C. Microstructure ti o fẹlẹfẹlẹ ṣẹda ọna tortuous fun awọn aṣoju ipata, pese idena mejeeji ati aabo irubọ (galvanic):
Idaabobo idena: Ipon, awọn fẹlẹfẹlẹ flake agbekọja ti ara ṣe idiwọ ọrinrin ati awọn ions kiloraidi lati de sobusitireti irin.
Ẹbọ (galvanic) Idaabobo: Sinkii flakes ni o wa electrochemically kere ọlọla ju irin; wọn baje ni pataki, aabo awọn egbegbe irin ti a fi han ni awọn aaye ti a ge ati awọn agbegbe ti o bajẹ.
Ipa iwosan ara ẹni: Awọn ọja ipata Zinc di awọn abawọn kekere ti a bo, ti o fa igbesi aye aabo.
Key Performance Data
| Ohun ini | Dacromet | Gbona-fibọ Galvanizing | Sinkii Electroplating | Fífifọ́sítì |
| Iyọ sokiri Resistance | ≥ 480 h (le de ọdọ 1000+ wakati) | 200-500 wakati | 96–120 wakati | <72 wakati |
| Sisanra aso | 6–10 µm | 50–100 µm | 5–15 µm | 5–15 µm |
| Embrittlement Hydrogen | Ko si (yan ko nilo) | Ko si | Ewu to gaju | Ewu kekere |
| Ifarada Opo | Ti ko ni ipa (aṣọ tinrin) | Nigbagbogbo fowo | Ni gbogbogbo O DARA | Ni gbogbogbo O DARA |
| Ibamu RoHS / REACH | Bẹẹni (hexavalent-Cr-ọfẹ) | Bẹẹni | O yatọ | Bẹẹni |
| Ohun elo Aṣojus | Eto ita gbangba, ile-iṣọ afẹfẹ, afara | Ita gbangba eru | Inu ile / ina | Ninu ile |
Idanwo sokiri iyọ fun ISO 9227. Aṣoju sisanra Dacromet: 6-10 µm. Awọn abajade le yatọ pẹlu agbekalẹ kan pato ati ọna ohun elo.
Wulo Standards & Ni pato
ISO 10683: Aisi-itanna ti a lo awọn ideri flake zinc fun awọn ohun mimu.
DIN EN ISO 10683: Iṣeduro European ti ISO 10683.
ASTM F1136: Zinc/aluminiomu ipata-idaabobo aso fun fasteners.
VDA 235-104: Ọwọn ọkọ ayọkẹlẹ ara ilu Jamani fun awọn ideri flake zinc.
Nipa Fujirui Irin - Ọjọgbọn Fastener olupese & atajasita
Fujirui Metal ṣe iṣelọpọ ati okeere awọn ohun elo pipe ti o wa pẹlu ite 8.8 / 10.9 / 12.9 hex bolts, DIN 933 bolts ti o ni kikun, DIN 931 awọn boluti apa-apakan, awọn boluti okunrinlada, ati awọn imuduro aṣa. Awọn aṣayan itọju oju oju pẹlu Dacromet, Ruspert, galvanising ti o gbona-dip, ati zinc electroplating. Gbogbo awọn ọja jẹ iṣelọpọ si ISO, DIN, ati awọn iṣedede ASTM pẹlu awọn iwe-ẹri idanwo ohun elo ni kikun (MTC).
