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I-Dacromet-Coated Flange Bolts nama-Flange Nuts
2026-10-29
1. Isingeniso
Lonke ilunga eliboshiwe liqine njengozakwethu obuthaka kakhulu. Ibhawodi le-flange lamandla aphezulu elihlanganiswe ne-hex nut elingavikelekile lakha a umbhangqwana we-galvanic, ugibe lokugqwala, kanye nokwehluleka kwenkambu yesikhathi esizayo. Lesi sihloko sethula ipheya efanisiwe - Amabhawudi e-flange ahlanganiswe ne-Dacromet (amabhawodi we-hex ane-flange ebalulekile ngaphansi kwekhanda) kanye Amantongomane e-flange ahlanganiswe ne-Dacromet (amantongomane e-hex anekhola ye-flange ejikelezayo) — futhi ichaza ukuthi kungani womabili amalungu elunga kufanele aphathe i-zinc-aluminium flake coating efanayo.
I-Dacromet coating - inqubo ye-zinc-flake engeyona i-electrolytic echazwe ISO 10683 futhi I-ASTM F1136 - iletha amahora angama-700 kuye kwayi-1,000 wokumelana nesifutho sikasawoti (i-ASTM B117 i-neutral salt spray, NSS) ukuya kuqala ukugqwala okubomvu, efilimini encane engu-8–12 μm, engena-no ukuntuleka kwe-hydrogen ingozi. Kufakwe ngokungaguquki kubhawodi futhi nut, ivikela lonke uhlelo lokubopha olunentambo: izindawo ezithwalayo, ubuso be-flange, kanye nemicu yangaphakathi nengaphandle ethwele umthwalo.
2. Izingxenye Ezimbili
2.1 Amabhawodi e-Hex flange
Ibhawodi ye-hex flange iyibhawodi lekhanda eliyi-hexagon eline-flange eyindilinga ehlanganisiwe (ubuso bewasha obakhelwe ngaphakathi) endaweni ethwele ikhanda, esezingeni. ISO 4162/DIN 6921 futhi I-GB/T 5789 / GB/T 16674. Izinketho zokuklama zihlanganisa:
- Uchungechunge oluncane lwe-flange- I-compact bearing diameter yezindawo ezivaliwe zamabhawodi;
- Uchungechunge lwe-flange olukhulu (olubanzi).- I-diameter ene-diameter engaba ngu-1.5 × d, eyehlisa ukucindezela kwendawo ngaphansi kwekhanda futhi inciphise ukushumeka ezintweni ezithambile ezifana nokubunjwa kwe-aluminium;
- I-Serrated flange- amazinyo e-radial ku-flange engaphansi aluma endaweni eboshwe, okwandisa ukumelana nokuzikhulula okubangelwa ukudlidliza ngaphandle kwewasha yokukhiya ehlukile.
3. Kungani Isistimu Efanisiwe Ibalulekile Ekulawuleni Ukugqwala
Ibhawodi enamakhekheba e-zinc egijima enatini elingenalutho noma elenziwe nge-electro-plated yakha a umbhangqwana we-galvanic: izindawo ezimbili ezingafani ezixhumene ne-electrolyte (imvula, ukufingqa, usawoti womgwaqo). Indawo engeyinhle kangako igqwala ngokukhethayo, ikhiqize ukugqwala okumhlophe (imikhiqizo ye-zinc oxidation) futhi ekugcineni ukugqwala okubomvu (i-base-steel corrosion) endaweni ebaluleke kakhulu - imicu ethwala ukulayisha kuqala. Ukumboza kokubili ibhawodi namantongomane ngohlelo olufanayo lwe-Dacromet kulinganisa amandla okugqwala futhi kususa amandla okuhlasela kwe-galvanic.
Inqubo ye-Dacromet ayihlanganisi i-acid pickling futhi ayikho i-electrolytic current, ngakho-ke ayikho i-athomu ye-athomu eyethulwa ensimbi. Lokhu kukwenza kube ukukhetha okujwayelekile kwamabhawudi e-flange anamandla aphezulu namantongomane e-flange esigaba sendawo engu-10.9 no-12.9, lapho ukwehluleka kwe-hydrogen embrittlement (HE) kwezibophelelo ze-electro-plated kuyingozi ebhaliwe.
4. I-Coating Performance Ukuqhathanisa
| Isistimu yokuhlanganisa (ibhawodi + nati, isigaba 8.8) | Ukujiya okujwayelekile | Fafaza usawoti ekugqwaleni okumhlophe | Futha usawoti ukugqwala okubomvu (NSS) | I-hydrogen embrittlement |
| I-electro-galvanized Zn5 | 5 umm | ≈ 24 h | ≈ 72–96 h | Ingozi ephezulu |
| I-electro-galvanized Zn12 | 12 um | ≈ 72 h | ≈ 192 h | Ingozi ephezulu |
| I-Mechanical galvanizing | 25–40 μm | ≈ 96 h | ≈ 400–500 h | Phansi |
| Idiphu elishisayo lifakwe amathini | 45–85 μm | — | ≈ 720 h | Phansi; imicu idinga ukuthepha kabusha, i-nut oversize |
| I-Dacromet DAC 320 (Ikilasi 2) | 8 umm | ≈ 240 h | ≈ 720 h | Cishe akekho |
| I-Dacromet DAC 500 / emnyama | 10-12 μm | ≈ 480 h | ≈ 1,000 h | Cishe akekho |
Enye inzuzo yokuhlanganisa: amantongomane afakwe uthayela ashisayo kufanele athintwe abe ngaphezulu, okunciphisa indawo yokugunda yamantongomane, kuyilapho amantongomane e-flange aboshwe nge-Dacromet agcina indinganiso. 6H ukubekezelela intambo namandla aphelele - ifilimu elizacile, eliqinile ligcina intambo ilingana, ngakho amabhawudi namantongomane kuhlangana ngokukhululekile nokungqubuzana okungaguquki futhi akukho ukuthuthumela yezindawo ezimboziwe.
5. Isiphetho
Amabhawodi e-flange aboshwe nge-dacromet namantongomane e-flange akha uhlelo lokuqiniswa oluthuthukisiwe: i-flange geometry isabalalisa umthwalo wokubopha, icindezela ukudlidliza, futhi iqede amawasha ahlukene, kuyilapho ukumbozwa kweflake okuhambisana ne-zinc-aluminium kuwo womabili amalungu kuvimbela imibhangqwana e-galvanic, ivala izindawo zokuqhekeka, ukumelana nokugqwala okubomvu, ukugqwala okubomvu nokugqwala okubomvu. igcina insimbi enamandla amakhulu ingenayo i-hydrogen embrittlement. Umthetho owodwa obaluleke kakhulu wokucaciswa uhlala: oda amabhawodi namantongomane njengohlelo olulodwa oluhambisanayo, oluvikelwe ukugqwala.
