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Bolts Flange-Dacromet-Dahaarka leh iyo Nuts Flange
2026-10-29
1. Hordhac
Kala-goys kasta oo goglan wuxuu u xoog badan yahay sida lammaanihiisa ugu liita. Bolt flange-xoog-sare leh oo la socda lows hex caadi ah oo aan la ilaalin ayaa abuura a lamaane galvanic ah, daxalka daxalka ah, iyo beer-la'aanta mustaqbalka. Maqaalkani waxa uu soo bandhigayaa lamaanaha is-qaba- Dacromet-dahaarka leh boolal flange (bolal hex ah oo madaxa hoostiisa ku leh flange muhiim ah) iyo Looska flange-dakromet-ku dahaaran (hex nuts oo leh koodhka flange wareega) - oo sharaxaya sababta labada xubnood ee wadajirka ah ay tahay inay qaataan daahan isku mid ah ee zinc-aluminium flake.
Dacromet - habka zinc-flake non-electrolytic ee lagu qeexay ISO 10683 iyo ASTM F1136 - Waxay keentaa 700 ilaa 1,000 saacadood oo iska caabin ah buufin milix ah (ASTM B117 buufin milix dhexdhexaad ah, NSS) marka hore miridhku cas, ku jira filim khafiif ah 8-12 μm, oo aan lahayn qallafsanaanta hydrogen khatarta. Si joogto ah loogu codsado bolt iyo lowska, waxa uu ilaaliyaa dhammaan nidaamka xidhidhiyaha dunta leh: oogadaha xadhkaha, wejiyada flange, iyo xadhkaha xadhkaha gudaha iyo dibaddaba.
2. Labada qaybood
2.1 bolts flange hex
Daboolka hex flange waa boodh madax lix gees ah oo leh flange wareeg ah oo isku dhafan (wejiga dhaqida ku dhex dhisan) oo ku yaal dusha sare ee madaxa hoostiisa, oo lagu habeeyey ISO 4162 / DIN 6921 iyo GB/T 5789 / GB/T 16674. Ikhtiyaarada naqshadaynta waxaa ka mid ah:
- Taxane flange yar- dhexroor is haysta ee meelaha boodhka ah ee xidhan;
- Taxane flange weyn (ballaaran).- dhexroorka xajinta qiyaastii 1.5 × d, kaas oo hoos u dhigaya cadaadiska madaxa hoostiisa oo yareynaya ku dhejinta walxaha jilicsan sida aluminium tuurista;
- Flange dhuuban- Ilkaha shucaaca ee garabka hoose ee qaniina dusha isku dheggan, kordhinta iska caabbinta gariir-ku keeno is-dejinta iyada oo aan lahayn weel gooni ah oo quful ah.
3. Waa maxay sababta nidaamka isku midka ah uu muhiim u yahay xakamaynta daxalka
Bool ka samaysan zinc-flake oo ku ordaya lowska qaawan ama korantada ku dhejisan ayaa qaabeeya a lamaane galvanic ah: laba sagxadood oo aan isku mid ahayn oo taabtay korantada (roob, uumi, milix waddo). Dusha sare ee sharafta yar ayaa si doorbidan u qudhuntaa, oo dhalisa miridhku cad (alaabooyinka oxidation zinc) iyo ugu dambeyntii miridhku cas (daxalka birta-saldhig) ee saxda ah meesha ugu muhiimsan - dunta xambaara horudhaca. Dahaarka labada bolt iyo lowska leh isla nidaamka Dacromet waxay barbaraysaa awoodaha daxalka waxayna meesha ka saaraysaa xoogga weerarka galvanic.
Habka Dacrometku kuma lug yeesho wax-soo-saarka aashitada iyo wax koronto ah oo hadda socda, sidaa darteed ma jiraan hydrogen atomic ah oo la gelinayo birta. Tani waxay ka dhigaysaa doorashada caadiga ah ee boolal-xoog-sare leh iyo lowska flange ee heerka hantida 10.9 iyo 12.9, halkaas oo cilladda hydrogen embrittlement (HE) ee xirayaasha elektiroonigga ah ay tahay khatar la diiwaangeliyay.
4. Isbarbardhigga Waxqabadka Dahaarka
| Habka dahaarka (bolt + lowska, fasalka 8.8) | Dhumucda caadiga ah | Buufin milix ilaa miridhku cad | Buufin milix ah ilaa miridhku cas (NSS) | Ebrittlement Hydrogen |
| Electro-galvanized Zn5 | 5 μm | ≈ 24 saac | ≈ 72-96 saac | Khatar sare |
| Electro-galvanized Zn12 | 12 μm | ≈ 72 saac | ≈ 192 saac | Khatar sare |
| galvanization makaanik | 25-40 μm | ≈ 96 saac | ≈ 400-500 saacadood | Hoose |
| Galvanized-ku-kulul | 45-85 μm | — | ≈ 720 saac | Hooseeyo; duntu waxay u baahan yihiin dib u taabsi, lowska ka weyn |
| Dacromet DAC 320 (Fasalka 2) | 8 μm | ≈ 240 saac | ≈ 720 saac | Dhab ahaantii midna |
| Dacromet DAC 500 / madow | 10-12 μm | ≈ 480 saac | ≈ 1,000 saac | Dhab ahaantii midna |
Faa'iido dheeri ah oo la isku daro: looska galvanized-ka kulul waa in la taabsiiyaa si ka weyn, taas oo yareyneysa aagga lowska ee waxtarka leh ee xiiraya, halka looska flange-dahaarka Dacromet ay ilaalinayaan heerka 6H dulqaadka dunta iyo xoog buuxda - dhuuban, filimka adag wuxuu ilaaliyaa taam ahaanshaha dunta, sidaa darteed boolal iyo lawsku si xor ah ayay isugu soo ururaan oo leh khilaaf joogto ah oo aan lahayn xamaasad ee dusha dahaarka leh.
5. Gabagabo
Dacromet-dahaarka dahaarka leh ee bolts iyo flange lawska waxay sameeyaan nidaam xirxiran oo la farsameeyay: joomatari flange wuxuu qaybiyaa culeyska xajinta, wuxuu xakameynayaa dabacsanaanta gariirka, wuxuuna baabi'iyaa dhaqdhaqaajiyaha kala duwan, halka dahaarka zinc-aluminium ee isku midka ah ee labada xubnood ay ka hortagayaan lamaanayaasha galvanic, waxay xiraan aagagga qulqulka, waxay ka hortagaan miridhku cad iyo miridh cas - 1,000. birta ka madax banaan ebrittlement hydrogen. Xeerka qeexida kaliya ee ugu muhiimsan ayaa hadhay: dalbo boolasha iyo lawska sidii mid iswaafajisay, nidaam daxal-ilaalin ah.
