- English
- Chinese
- French
- German
- Portuguese
- Spanish
- Russian
- Japanese
- Korean
- Arabic
- Irish
- Greek
- Turkish
- Italian
- Danish
- Romanian
- Indonesian
- Czech
- Afrikaans
- Swedish
- Polish
- Basque
- Catalan
- Esperanto
- Hindi
- Lao
- Albanian
- Amharic
- Armenian
- Azerbaijani
- Belarusian
- Bengali
- Bosnian
- Bulgarian
- Cebuano
- Chichewa
- Corsican
- Croatian
- Dutch
- Estonian
- Filipino
- Finnish
- Frisian
- Galician
- Georgian
- Gujarati
- Haitian
- Hausa
- Hawaiian
- Hebrew
- Hungarian
- Icelandic
- Igbo
- Javanese
- Kannada
- Kazakh
- Khmer
- Kurdish
- Kyrgyz
- Latin
- Latvian
- Lithuanian
- Luxembou..
- Macedonian
- Malagasy
- Malay
- Malayalam
- Maltese
- Maori
- Marathi
- Mongolian
- Burmese
- Nepali
- Norwegian
- Pashto
- Persian
- Punjabi
- Serbian
- Sesotho
- Sinhala
- Slovak
- Slovenian
- Somali
- Samoan
- Scots Gaelic
- Shona
- Sindhi
- Sundanese
- Swahili
- Tajik
- Tamil
- Telugu
- Thai
- Ukrainian
- Urdu
- Uzbek
- Vietnamese
- Welsh
- Xhosa
- Yiddish
- Yoruba
- Zulu
- Kinyarwanda
- Tatar
- Oriya
- Turkmen
- Uyghur
Dacromet Coated Flange Bolts-Ib Daim Ntawv Qhia Qhia Txog Kev Tsim, Txheej Tshuab, thiab Kev Siv Khoom Siv
2026-08-12 IB
1. Taw qhia
Flange bolts sawv cev rau pawg tseem ceeb ntawm kev lag luam fasteners, sib txuas ua haujlwm ntawm tus qauv ntsia liaj qhov rooj nrog kev sib xyaw ua ke zoo li flange hauv qab lub taub hau ntsia liaj qhov rooj. Thaum ua ke nrog Dacromet txheej thev naus laus zis, cov fasteners no ua tiav qhov tshwj xeeb ntawm cov khoom siv dag zog thiab kev tiv thaiv corrosion, ua rau lawv tseem ceeb hauv kev xav tau ib puag ncig xws li kev tsim tsheb, kev tsim kho, marine engineering, thiab cov tshuab hnyav.
Kab lus no muab cov ncauj lus kom ntxaws txog Dacromet coated flange bolts los ntawm ob qhov kev xav ntxiv: cov qauv tsim thiab cov khoom siv ntawm cov flange bolts, thiab cov thev naus laus zis thev naus laus zis hu ua Dacromet. Ua ke, cov ntsiab lus no txhais cov kev daws teeb meem uas ua tau raws li cov kev cai nruj ntawm kev siv engineering niaj hnub.
2. Nkag siab Flange Bolts
Lub flange ntsia liaj qhov rooj yog ib tug threaded fastener featuring ib tug dav flange integrated ncaj qha rau hauv qab lub taub hau hexagonal. Qhov flange no faib cov clamping load tshaj qhov chaw loj dua, tshem tawm qhov xav tau ntawm lub tshuab ntxhua khaub ncaws thiab txo lub sijhawm sib dhos. Cov flange kev sib xyaw ua ke kuj muab kev tiv thaiv zoo rau kev xoob hauv kev vibration, ib qho kev xav tseem ceeb hauv qhov chaw dynamic load.
Flange bolts yog tsim nyob rau hauv ob qho tib si serrated thiab tsis-serrated variants. Serrated flange bolts feature cov hniav nyob rau hauv qab ntawm lub flange uas tuav lub mating nto, muab superior tiv thaiv kev co. Cov tsis-serrated versions muaj ib tug du bearing nto, haum rau daim ntaub ntawv uas nto puas yuav tsum tau txo.
Table 1. Hom Specifications ntawm Dacromet Flange Bolts
| Specification | Kev ntsuas ntsuas | Txuj | Khoom siv |
| Xov Diameter | M6 - M24 | TS EN ISO 4162 / DIN 6921 | Carbon hlau (SCM435) |
| Chav Kawm Khoom | 8.8 / 10.9 / 12.9 | TS EN ISO 898-1 | Hlau alloy |
| Flange Txoj kab uas hla | 13-42 hli | TS EN ISO 4162 | Carbon Steel |
| Nto Txheej | Dacromet (Zn-Al) | ISO 10683 Kev Tswj Xyuas Kev Lag Luam | Zinc-Aluminium Flake |
| Ntsev Txau Resistance | 1,000-3,000 teev | ASTM B 117 | Tsis Muaj Liab |
| Kev khiav hauj lwm Temp. | -40C rau 300C | Industrial Std. | Thaum tshav kub kub Resistant |
3.Dacromet Txheej Technology
Dacromet yog ib qho dej-raws li qib siab, uas tsis yog-electrolytic nto txheej txheej txheem tsim los daws cov kev txwv ntawm cov pa galvanizing. Cov txheej muaj zinc flakes, aluminium flakes, thiab chromate compounds dispersed nyob rau hauv ib tug aqueous binder system. Thaum thov thiab kho, cov flakes no tsim ib qhov ntom ntom, txheej thaiv uas muab kev tiv thaiv corrosion tshwj xeeb yam tsis muaj kev pheej hmoo ntawm hydrogen embrittlement.
Cov txheej txheem dacromet txheej txheem sib txawv ntawm cov txheej txheem electroplating. Tsis yog tso cov hlau los ntawm electrolysis, Dacromet siv lub dip-spin los yog tshuaj tsuag daim ntawv thov ua raws li kev kub kub kho. Thaum lub sij hawm kho ntawm kwv yees li 280-320 degrees Celsius, zinc thiab txhuas flakes sinter ua ke thiab daim ntawv cog lus rau cov hlau substrate los ntawm chromate-mediated cross-linking mechanism. Cov txheej txheej tshwm sim yog nyias (feem ntau 6-10 microns), zoo ib yam, thiab tsis tshua muaj kev sib haum xeeb.
3.1 Txheej txheej txheej txheem txheej txheem
Dacromet daim ntawv thov txheej txheem suav nrog ntau theem kev tswj hwm qhov tseeb, txhua qhov ua rau muaj qhov ua tau zoo kawg ntawm txheej txheej:
Rooj 2. Dacromet txheej txheej txheej txheej
| Kauj ruam | Txheej txheem | Kev piav qhia |
| 1 | Kev kho mob ua ntej | Degreasing, tua blasting, thiab ultrasonic tu kom tshem tawm cov roj, nplai, thiab cov kab mob ntawm cov ntsia liaj qhov rooj. |
| 2 | Dipping / Txau | Bolts tau muab tso rau hauv lossis txau nrog Dacromet dej txheej txheej uas muaj zinc thiab txhuas flakes. |
| 3 | Tshuab ziab khaub ncaws | Centrifugal spinning tshem tawm cov txheej dhau los kom ntseeg tau tias cov tuab tuab (6-10 microns). |
| 4 | Kho | Ci ntawm 280-320C rau 20-30 feeb, sib txuas flakes rau lub substrate los ntawm sintering. |
| 5 | Lub tsho thib ob | Lub voj voog thib ob-thiab-kho kho yog siv rau kev tiv thaiv kev txhim kho corrosion (yeem xaiv rau cov txheej hnyav dua). |
| 6 | Kev kho zaum kawg | Thaum kawg ci ntawm 300C ua kom tiav kev sib txuas thiab qhov siab tshaj plaws ntawm cov txheej. |
Tag nrho cov txheej txheem feem ntau ua tiav hauv ob txheej txheej txheej kom ua tiav qhov xav tau txheej thickness thiab corrosion kuj. Txhua lub voj voog muaj daim ntawv thov, tig-qhuav, thiab kho, nrog cov khoom kawg uas nthuav tawm cov yam ntxwv ntawm cov nyiaj-grey.
4.Qhov zoo ntawm Dacromet Txheej
Dacromet txheej muaj ntau qhov zoo sib xws ntawm cov txheej txheem kev kho saum npoo, ua rau nws qhov kev xaiv zoo tshaj plaws rau kev ua haujlwm siab fastener daim ntaub ntawv:
Superior Corrosion Resistance: Dacromet-coated fasteners tuaj yeem tiv taus 1,000 mus rau 3,000 teev ntawm kev tshuaj ntsuam ntsev ntsev (ASTM B117) ua ntej cov tsos ntawm xeb liab, ua tau zoo tshaj cov tsoos zinc electroplating (300-700 teev).
Tsis muaj Hydrogen Embrittlement: Tsis zoo li electroplating, cov txheej txheem Dacromet tsis koom nrog electrolysis, tshem tawm cov kev pheej hmoo ntawm hydrogen embrittlement. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov bolts muaj zog (Class 10.9 thiab 12.9) siv hauv kev nyab xeeb-tseem ceeb.
Kev Tiv Thaiv Thaum Kub Kub Zoo: Qhov xwm txheej tsis zoo ntawm Dacromet txheej tso cai rau nws tswj hwm nws cov khoom tiv thaiv ntawm qhov kub txog li 300 degrees Celsius, deb tshaj qhov thermal txwv ntawm cov organic coatings thiab cov pa zinc plating.
Cov Txheej Txheem Txheej Txheem: Cov txheej txheem dip-spin daim ntawv thov ua kom cov txheej txheej tuab zoo ib yam txawm tias nyob rau hauv cov geometries nyuaj, nrog rau cov chaw threaded thiab recesses qhov twg electroplating tuaj yeem tsim cov khoom tsis sib xws.
Environmental Compliance: Niaj hnub nimno Dacromet formulations yog dawb ntawm hexavalent chromium (Cr6+), ua raws li RoHS, ELV, thiab REACH cov lus qhia, ua rau lawv haum rau automotive thiab electronics daim ntaub ntawv.
5. Cov ntawv thov kev lag luam
Dacromet coated flange bolts pom kev siv dav hauv ntau qhov kev lag luam uas ob qho tib si kev ncaj ncees thiab kev tiv thaiv corrosion mus ntev yog qhov tseem ceeb:
Automotive Kev Lag Luam: Siv nyob rau hauv chassis sib dhos, cav mounts, nres tshuab, thiab ncua kev kawm ntawv qhov twg high-strength fastening ua ke nrog ntsev tsuag kuj yog ib qho tseem ceeb. Cov OEMs tseem ceeb qhia txog Dacromet-coated fasteners rau hauv qab daim ntawv thov raug rau txoj kev ntsev thiab dej noo.
Kev tsim kho thiab Infrastructure: Ua haujlwm hauv kev sib txuas ntawm cov qauv hlau, cov khoom siv choj, thiab cov khoom siv sab nraum zoov uas tus kheej faib flange tsim txo lub sijhawm teeb tsa thiab Dacromet txheej muab ntau xyoo ntawm kev saib xyuas dawb.
Marine thiab Offshore: Qhov tshwj xeeb ntsev tshuaj tiv thaiv ntawm Dacromet txheej (txog 3,000 teev) ua rau cov bolts no zoo tagnrho rau kev tsim cov nkoj, cov chaw nyob sab nrauv, thiab cov khoom siv kho vaj tse uas raug rau cov dej ntsev tsis tu ncua.
Cua Zog: Siv nyob rau hauv turbine ntauwd flanges thiab nacelle cov rooj sib txoos qhov twg muaj zog bolting yuav tsum tiv taus cyclic loading thiab ib puag ncig raug tshaj 20+ xyoo kev pab cuam lub neej.
Railway thiab Heavy Machinery: Siv nyob rau hauv txoj kev fastening systems, locomotive Cheebtsam, thiab mining khoom qhov twg kev co kuj thiab corrosion tiv thaiv ib txhij yuav tsum tau.
