I-Dacromet Flange Bolts-Technical Overview 

1. Isingeniso

Amabhawodi e-Dacromet flange ayizixhumi eziqinile ezihlanganisa ukwakheka kwekhanda eline-flanged ne-zinc-aluminium flake coating eyaziwa ngokuthi i-Dacromet (ebizwa nangokuthi i-zinc-chromium coating). I-flange ehlanganisiwe ngaphansi kwekhanda isakaza umthwalo we-clamping ngokulinganayo, yandisa indawo yokuthwala, ithuthukisa ukumelana nokuxegisa okubangelwa ukudlidliza, futhi ivame ukuqeda isidingo se-washer ehlukile.

Yathuthukiswa ngeminyaka yawo-1970 njengenye indlela esebenza kahle kakhulu yokuhlanganisa i-electroplating ne-cadmium evamile, ubuchwepheshe be-Dacromet buye baba indlela yokwelapha ethandwayo yamabhawodi eBanga lesi-8.8, 10.9 no-12.9. Lezi zibophelelo zisetshenziswa kakhulu kuma-chassis wezimoto kanye nemihlangano ye-powertrain, izakhiwo ze-wind-turbine, imishini yezolimo neyokwakha, imishini yokucubungula amakhemikhali, ukufakwa olwandle kanye nengqalasizinda yensimbi yangaphandle lapho ukumelana nokugqwala kubaluleke kakhulu.

Umfanekiso A. Ukubonakala kommeleli wamabhawodi e-hex flange ahlanganiswe ne-Dacromet (ukuqedwa kwe-metallic silver-grey).

2. Iyini i-Dacromet Coating?

I-Dacromet i-non-electrolytic, i-inorganic coating esekelwe emanzini ehlanganisa ama-zinc flakes, ama-aluminium flakes nezinhlanganisela ze-chromium (noma izibophezelo zesimanje ezingenayo i-chromium) ezihlakazwe ku-matrix ekhethekile. I-coating isetshenziswa ngezindlela ze-dip-spin, i-spray noma i-dip-drain bese yelapheka ngokushisa okungaba ngu-300-320 ° C. Ngesikhathi sokuphulukisa isakhiwo se-lamellar esiminyene, esinezingqimba eziningi sakhiwe esihlinzeka ngesikhathi esisodwa ukuvikelwa kwesithiyo nokuvikelwa komhlatshelo (i-cathodic) ye-substrate yensimbi.

Ugqinsi olujwayelekile lwefilimu elomile lusukela ku-5 kuye ku-12 μm. Naphezu kobuncane bayo, ukugqoka kuvame ukuletha amahora angu-≥1,000 (imvamisa amahora angu-1,200–2,000 wezinhlelo ezithuthukisiwe) okuvikela ekuhlolweni kwesifutho sikasawoti esingathathi hlangothi (ASTM B117 / ISO 9227) ngaphambi kokuvela kokugqwala okubomvu—cishe izikhathi eziyi-7 kuye kweziyi-10 ukusebenza kogqinsi olujwayelekile lwe-electroagal.

3. Izinzuzo Eziyinhloko

• Ukumelana Nokugqwala Okukhethekile: ≥1,000–1,500 h isifutho sikasawoti esijwayelekile; okuhlukile kokusebenza okuphezulu kweqa i-2,000 h.
• Ingozi Ye-Zero Hydrogen Embrittlement: Inqubo ayisebenzisi i-acid pickling noma i-electrolysis, ikwenze kuphephe kumabhawodi anamandla aphezulu (Ibanga 10.9+).
• Amandla Okushisa Okuphezulu: Ukusebenza kokuvikela kugcinwa kuze kufike ku-300 ° C.
• Ukulawulwa Kwe-Dimensional Okuhle Kakhulu: Ifilimu iyunifomu ezacile igcina intambo yejometri; asikho isidingo samantongomane amakhulu.
• Izinzuzo ze-Flange Design: Ngisho nokusatshalaliswa komthwalo, ukucindezela kwendawo okuncishisiwe kanye nokumelana nokudlidliza okuthuthukisiwe.
• Iphrofayili Yemvelo Ethandekayo: Ikhemistri esekwe emanzini esebenzisa iluphu evaliwe kanye nokugeleza kukadoti okuncishisiwe.

4. Ukuqhathanisa Ukusebenza Nezingubo Zomdabu

5. Inqubo Yokukhiqiza Nokwemboza

Ukulandelana kwenqubo evamile kuhlanganisa: ukuhlanzwa kwe-alkaline nokunciphisa amafutha; ukukhishwa kwemishini noma ukuqhunyiswa kwe-abrasive (i-asidi pickling igwenywa ngamabomu); ukusetshenziswa kwe-zinc-flake slurry nge-dip-spin noma isifutho; ukuphulukiswa okushisayo ku-300-320 ° C; ukufaka ijazi eligcotshisiwe noma eliyisivikelo ngokuzikhethela; kanye nokupholisa kokugcina kanye nokuhlolwa. Izicelo ezimbili ezilandelanayo ze-basecoat zivame ukusetshenziswa ukuze kufinyelelwe ugqinsi oludingekayo kanye nezinga lokusebenza. Izilawuli ezibalulekile zihlanganisa ukuhlanzeka kwendawo, i-slurry viscosity, imingcele ye-spin, ukufana kwezinga lokushisa lomlilo kanye nokuqinisekiswa kwesisindo sokugcina.

6. Izicelo Ezijwayelekile

• Izimoto Nezokuthutha: I-chassis, ukumiswa, injini nezinsimbi zokubopha amabhuleki ezichayeke kusawoti womgwaqo, umswakama kanye nokuhamba ngebhayisikili okushisayo.
• Amandla omoya: Amabhawodi ombhoshongo kanye nesisekelo samaturbine angasogwini nasogwini okufanele abekezelele ukuchayeka emkhathini we-saline iminyaka eminingi ngokulungiswa okuncane.
• Imishini Yezolimo Nokwakha: Izisetshenziswa ezisebenza ezindaweni eziqukethe umswakama, umanyolo, ukuhuzuka kwenhlabathi kanye nesimo sezulu sangaphandle.
• Imboni Yekhemikhali Nenqubo: Izixhumanisi ze-flange nezibophelelo zesakhiwo ezitshalweni eziphethe uketshezi olubolayo noma umkhathi.
• Ingqalasizinda nezasolwandle: Amabhuloho, imibhoshongo yokuthutha, izakhiwo ezisogwini, imishini yamachweba kanye nezinkundla zasolwandle.

Umfanekiso 4. Amandla okusebenza ahlobene ezici eziyinhloko ze-Dacromet.

7. Amazinga, Amabanga & Nesiqondiso Sokukhetha

Izindinganiso zobukhulu ngokuvamile okubhekiselwa kuzo zifaka i-DIN 6921 kanye ne-ISO 4162 (amabhawodi anehexagon flange) kanye namazinga alinganayo kazwelonke afana ne-GB/T 5787. Izigaba zezakhiwo zikamshini ezivame ukuhlinzekwa nge-Dacromet coating ziyi-8.8, 10.9 kanye no-12.9 ngokuya nge-ISO 898-1. Ukusebenza kokumboza kuvame ukucaciswa ngesisindo sokwemboza (Ibanga A ≈ 24 g/m², IBanga B ≈ 36 g/m²) noma ngenani elincane lamahora okubulala usawoti. I-OEM yezimoto eziningi kanye nokucaciswa kwesakhiwo kukhetha ngokusobala amasistimu e-zinc-flake kumabhawodi anamandla kakhulu ngoba aqeda ubungozi be-hydrogen-embrittlement.

Amathiphu okukhetha asebenzayo:

1. Khetha ikilasi lokusebenza kokumboza ngokwesigaba esilindelekile sokubola kwemvelo (ISO 9223 C3–C5 noma ngaphezulu).
2. Ku-Grade 10.9 nangaphezulu, cacisa i-Dacromet noma i-zinc-flake coating efanayo kune-electroplating evamile.
3. Uma ukunemba kwetorque yokuhlanganisa noma ukusebenza kokuqinisa kaningi kubalulekile, cela ijazi elilawulayo lokungqubuzana (i-coefficient evamile yokungqubuzana okungu-0.10–0.18).
4. Bamba futhi ufake amabhawodi ngokucophelela ukuze ugweme ukulimala komshini efilimu enamathelayo ethambile.

8. Isiphetho

Amabhawodi e-Dacromet flange anikeza ibhalansi enhle kakhulu yamandla aphezulu emishini, ukuvikela ukugqwala kwesikhathi eside, ukunemba kwe-dimensional nokuphepha kokusebenza. Ngokususa ubungozi be-hydrogen embrittlement kanye nokuletha impilo yesevisi yeminyaka eminingi ngisho nasezindaweni ezinolaka, banciphisa izindleko zokunakekela futhi bakhulise ukwethembeka kwesakhiwo kuyo yonke imikhakha yezimoto, yamandla avuselelekayo, izimboni kanye nengqalasizinda. Ukucaciswa okucacile kwebanga lomshini elidingekayo, indinganiso yobukhulu, ikilasi lokusebenza kokumboza nanoma yiziphi izidingo zejazi eliphezulu ziqinisekisa ukuthi izibophelelo zizokwenza njengoba zihlosiwe kuyo yonke impilo yazo yesevisi.