Dacromet Flange Bolts-Technical Overview 

1. Mawu Oyamba

Dacromet flange bolts ndi zomangira zamphamvu kwambiri zomwe zimagwirizanitsa kapangidwe ka mutu wa flanged ndi nsalu yapamwamba ya zinc-aluminium flake yotchedwa Dacromet (yomwe imatchedwanso zinc-chromium coating). The Integrated flange pansi pa mutu amagawira clamping katundu mofanana, kumawonjezera kunyamula pamwamba, kumapangitsanso kukana kugwedera-kuchititsa kumasuka, ndipo kawirikawiri amachotsa kufunika kwa wacha osiyana.

Kupangidwa m'ma 1970 ngati njira yabwino kwambiri yopangira ma electroplating ndi cadmium, teknoloji ya Dacromet yakhala njira yabwino yopangira ma bolts a Giredi 8.8, 10.9 ndi 12.9. Zomangamangazi zimagwiritsidwa ntchito kwambiri pamisonkhano yamagalimoto yachassis ndi powertrain, nyumba zopangira mphepo, makina aulimi ndi zomangamanga, zida zopangira mankhwala, kukhazikitsa m'madzi ndi zida zakunja zachitsulo komwe kukana kwa dzimbiri kwanthawi yayitali ndikofunikira.

Chithunzi A. Choyimira mawonekedwe a Dacromet- TACHIMATA hex flange mabawuti (zitsulo siliva-imvi mapeto).

2. Kodi Dacromet Coating ndi chiyani?

Dacromet ndi zokutira zopanda electrolytic, zokhala ndi madzi zokhala ndi zinc flakes, aluminium flakes ndi chromium compounds (kapena zomangira zamakono zopanda chromium) zomwazikana mu matrix apadera. Chophimbacho chimagwiritsidwa ntchito ndi dip-spin, spray kapena dip-drain ndipo amachiritsidwa ndi kutentha pafupifupi 300-320 ° C. Pakuchiritsa wandiweyani, mawonekedwe a lamellar opangidwa ndi mitundu yambiri amapangidwa omwe amapereka chitetezo chotchinga komanso chitetezo cha nsembe (cathodic) cha gawo lapansi lachitsulo.

Kuchuluka kwa filimu yowuma kumayambira 5 mpaka 12 μm. Ngakhale kuonda kwake, chophimbacho chimapereka ≥1,000 maola (nthawi zambiri maola 1,200-2,000 pamakina okhathamiritsa) achitetezo pakuyezetsa kosalowererapo mchere (ASTM B117 / ISO 9227) kusanachitike dzimbiri lofiira - pafupifupi 7 mpaka 10 kuwirikiza kofanana ndi makulidwe amagetsi amagetsi.

3. Ubwino waukulu

• Kukaniza Kwapadera kwa Corrosion: ≥1,000-1,500 h mchere kutsitsi mmene; mitundu yogwira ntchito kwambiri imapitilira 2,000 h.
• Chiwopsezo cha Zero Hydrogen Embrittlement: Njirayi sigwiritsa ntchito pickling ya asidi kapena electrolysis, zomwe zimapangitsa kuti zikhale zotetezeka ku mabawuti amphamvu kwambiri (Giredi 10.9+).
• Kutentha Kwambiri: Ntchito yoteteza imasungidwa mpaka pafupifupi 300 ° C.
• Kuwongolera Kwabwino Kwambiri: Filimu yopyapyala yofananira imasunga ulusi wa geometry; osafunikira mtedza wokulirapo.
• Ubwino Wopanga Flange: Ngakhale kugawa katundu, kuchepetsa kuthamanga kwa pamwamba komanso kusinthasintha kwa kugwedezeka.
• Mbiri Yabwino Yachilengedwe: Chemistry yozikidwa pamadzi yokhala ndi zotsekera zotsekeka komanso kuchepetsa zinyalala.

4. Kufananiza kwa Magwiridwe ndi Zovala Zachikhalidwe

5. Kupanga & Kupaka Njira

Njira yotsatirira imaphatikizapo: kuyeretsa kwa alkaline ndikuchotsa mafuta; kuwotcha kwamakina kapena kuphulika kwa abrasive (kuwotcha asidi kumapewa mwadala); kugwiritsa ntchito zinc-flake slurry ndi dip-spin kapena kupopera; kutentha kwa 300-320 ° C; kugwiritsa ntchito chovala chapamwamba chokhala ndi mafuta kapena chitetezo; ndi kuziziritsa komaliza kuphatikiza kuyendera. Mapulogalamu awiri otsatizana a basecoat amagwiritsidwa ntchito pafupipafupi kuti afikire makulidwe ofunikira ndi magwiridwe antchito. Kuwongolera kofunikira kumaphatikizapo ukhondo wapamtunda, slurry viscosity, spin parameters, kufanana kwa kutentha kwa ng'anjo ndi kutsimikizira kulemera komaliza.

6. Ntchito Zofananira

• Magalimoto & Mayendedwe: Chassis, kuyimitsidwa, zomangira injini ndi ma brake system zowululidwa ndi mchere wamsewu, chinyezi komanso kupalasa njinga zotentha.
• Mphamvu za Mphepo: Maboliti a nsanja ndi maziko a ma turbine akumtunda ndi akunyanja omwe amayenera kupirira kuwonekera kwazaka zambiri kumlengalenga wamchere osakonza pang'ono.
• Makina aulimi ndi zomangamanga: Zida zomwe zimagwira ntchito m'malo okhala ndi chinyezi, feteleza, kuwonongeka kwa nthaka ndi nyengo yakunja.
• Makampani a Chemical & Processing: Kulumikizana kwa flange ndi zomangira zomangira muzomera zomwe zimagwira madzi owononga kapena mlengalenga.
• Infrastructure & Marine: Milatho, nsanja zotumizira, zida zam'mphepete mwa nyanja, zida zamadoko ndi nsanja zakunyanja.

Chithunzi 4. Mphamvu zachibale za makhalidwe akuluakulu a Dacromet.

7. Miyezo, Maphunziro & Malangizo Osankha

Mfundo zazikuluzikulu zomwe zimatchulidwa kawirikawiri zikuphatikizapo DIN 6921 ndi ISO 4162 (ma hexagon flange bolts) pamodzi ndi mfundo zofanana za dziko monga GB/T 5787. Makasitomala amakina omwe nthawi zambiri amaperekedwa ndi Dacromet zokutira ndi 8.8, 10.9 ndi 12.9 malinga ndi ISO 898-1. Kuchita zokutira nthawi zambiri kumatchulidwa ndi kulemera kwake (Giredi A ≈ 24 g/m², Gulu B ≈ 36 g/m²) kapena ndi maola ochepa opopera mchere. Ma OEM ambiri amagalimoto ndi kapangidwe kake kamakonda kwambiri makina a zinc-flake a ma bolt amphamvu kwambiri chifukwa amachotsa chiwopsezo cha hydrogen-embrittlement.

Malangizo othandiza posankha:

1. Sankhani kalasi yochitira zokutira molingana ndi gulu lomwe likuyembekezeka kuwononga chilengedwe (ISO 9223 C3-C5 kapena kupitilira apo).
2. Kwa Giredi 10.9 ndi pamwambapa, tchulani Dacromet kapena zokutira zofanana ndi zinki m'malo mwa electroplating wamba.
3. Pamene kulondola kwa torque kapena kulimba kwapang'onopang'ono kuli kofunika, funsani topcoat yowongoka (yofanana ndi friction 0.10–0.18).
4. Gwirani ndi kukhazikitsa mabawuti mosamala kuti mupewe kuwonongeka kwamakina kwa filimu yofewa yokutira.

8. Mapeto

Maboti a Dacromet flange amapereka mphamvu zabwino zamakina apamwamba, kutetezedwa kwa dzimbiri kwa nthawi yayitali, kulondola kwenikweni komanso chitetezo chogwira ntchito. Pochotsa chiwopsezo cha hydrogen embrittlement ndikupereka moyo wautumiki wazaka zambiri ngakhale m'malo ovuta, amachepetsa ndalama zolipirira ndikuwonjezera kudalirika kwamapangidwe pamagalimoto, mphamvu zongowonjezwdwa, mafakitale ndi zomangamanga. Mafotokozedwe omveka bwino a kalasi yofunikira yamakina, mulingo wowoneka bwino, kalasi yochitira zokutira ndi zofunikira zilizonse za topcoat zimatsimikizira kuti zomangira zimagwira ntchito momwe amafunira nthawi yonse yautumiki wawo.