I-Dacromet Flange Bolts-Umbono wobuGcisa 

1. Intshayelelo

I-Dacromet flange bolts yi-fasteners ephezulu edibanisa idizayini yentloko ene-flanged kunye ne-zinc-aluminium flake ephezulu eyaziwa ngokuba yi-Dacromet (ekwabizwa ngokuba yi-zinc-chromium coating). I-flange edibeneyo phantsi kwentloko isasaza i-clamping umthwalo ngokulinganayo, yandisa indawo yokuthwala, iphucula ukuchasana nokuxhatshazwa kwe-vibration-induced loosinging, kwaye ihlala iphelisa imfuno ye-washer eyahlukileyo.

Ephuhliswe kwiminyaka yee-1970 njengenye indlela yokusebenza okuphezulu kwi-electroplating eqhelekileyo kunye ne-cadmium coatings, iteknoloji ye-Dacromet iye yaba yinto ekhethiweyo yonyango lweBanga lesi-8.8, i-10.9 kunye ne-12.9. Ezi zibophelelo zisetyenziswa kakhulu kwiindibano ze-chassis yemoto kunye ne-powertrain, izakhiwo ze-injini yomoya, oomatshini bezolimo kunye nokwakha, izixhobo zokulungisa imichiza, ukufakwa kweelwandle kunye neziseko zentsimbi zangaphandle apho ukuxhatshazwa kwexesha elide kubalulekile.

Umzobo A. Ummeli wenkangeleko ye-Dacromet-coated hex flange bolts (i-metallic silver-gray finish).

2. Yintoni i-Dacromet Coating?

I-Dacromet yinto engeyiyo i-electrolytic, i-coating yamanzi esekelwe emanzini equkethe i-zinc flakes, i-aluminium flakes kunye ne-chromium compounds (okanye i-chromium-free binders yanamhlanje) ehlakazwe kwi-matrix ekhethekileyo. Ukwaleka kusetyenziswa iindlela zediphu-spin, isitshizi okanye idip-drain kwaye inyangelwe ngokushushu malunga ne-300-320 °C. Ngexesha lokunyanga i-dense, i-lamellar i-multi-layered structure yenziwe ukuba ngexesha elifanayo ibonelela ngokukhuselwa komqobo kunye nokukhuselwa kwedini (cathodic) ye-substrate yensimbi.

Ubukhulu obuqhelekileyo befilimu eyomileyo busuka kwi-5 ukuya kwi-12 μm. Ngaphandle kobuncinci bayo, i-coating ihambisa rhoqo ≥1,000 iiyure (ngokuqhelekileyo iiyure eziyi-1,200-2,000 kwiinkqubo eziphuculweyo) zokukhusela kuvavanyo lwe-salt-spray engathathi hlangothi (ASTM B117 / ISO 9227) ngaphambi kokubonakala kwe-rust ebomvu-malunga ne-7 ukuya kwi-10 amaxesha obunzima be-standard compagal vanization of standard compagal-vanizing.

3. Izinto eziluncedo ezingundoqo

• Ukuxhathisa okuKhethekileyo kuMhlwa: ≥1,000–1,500 h isitshizi setyuwa eqhelekileyo; Ukwahluka kokusebenza okuphezulu kudlula i-2,000 h.
• Zero Hydrogen Embrittlement Risk: Inkqubo ayisebenzisi i-acid pickling okanye i-electrolysis, eyenza ikhuseleke kwiibholiti eziphezulu (iBanga le-10.9 +).
• Isakhono soBubushushu obuphezulu: Ukusebenza okukhuselekileyo kugcinwa ukuya kutsho malunga ne-300 °C.
• Ulawulo oluBalaseleyo lweDimensional: Ifilimu ebhityileyo iyunifomu igcina ijometri yomsonto; akukho mfuneko yamandongomane amakhulu.
• IiNzuzo zoyilo lweFlange: Kwanokusasazwa komthwalo, ukuncitshiswa koxinzelelo lomphezulu kunye nokuphuculwa kokumelana nokungcangcazela.
• Iprofayile yokusiNgqongileyo eKholekileyo: I-chemistry esekelwe emanzini kunye nesicelo esivaliweyo kunye nokunciphisa imilambo yenkunkuma.

4. Ukuthelekiswa koMsebenzi kunye neeNgqungquthela zeMveli

5. Inkqubo yokuVelisa kunye nokuNgquma

Ulandelelwano lwenkqubo eqhelekileyo lubandakanya: ukucocwa kwe-alkaline kunye nokunciphisa; ukuchithwa komatshini okanye ukuqhushumba kwe-abrasive (i-asidi pickling igwenywe ngabom); ukusetyenziswa kwe-zinc-flake slurry nge-dip-spin okanye isitshizi; ukunyangwa kwe-thermal kwi-300-320 ° C; isicelo esikhethiweyo sengubo egcotyiweyo okanye ekhuselayo; kunye nokupholisa okokugqibela kunye nokuhlolwa. Izicelo zebasecoat ezimbini ezilandelelanayo zihlala zisetyenziswa ukufikelela ubukhulu obufunekayo kunye nenqanaba lokusebenza. Ulawulo olubalulekileyo lubandakanya ukucoceka komphezulu, i-slurry viscosity, i-spin parameters, ukufana kobushushu besithando somlilo kunye nokuqinisekiswa kobunzima bokugqibela.

6. Usetyenziso oluqhelekileyo

• Iimoto & nezoThutho: I-Chassis, ukumiswa, i-injini kunye ne-brake-system fasteners ezivezwe kwityuwa yendlela, ukufuma kunye nokuhamba ngebhayisikile eshushu.
• Amandla omoya: Iibholiti zeNqaba kunye nesiseko kwiiinjini zomoya eziselunxwemeni nangaphandle konxweme ekufuneka zinyamezele ukuvezwa iminyaka emininzi kwiatmosphere yetyuwa enokulungiswa okuncinci.
• Oomatshini bezoLimo noLwakhiwo: Izixhobo ezisebenza kwiindawo eziqulethe ukufuma, izichumisi, ukukrazula komhlaba kunye nemozulu yangaphandle.
• Ishishini leMichiza kunye neNkqubo: Ukudityaniswa kwe-flange kunye nezibophelelo zesakhiwo kwizityalo eziphethe ulwelo olonakalisayo okanye i-atmosphere.
• Iziseko zophuhliso & nezaseLwandle: Iibhulorho, iinqaba zothumelo, izakhiwo ezingaselunxwemeni, izixhobo zamazibuko kunye namaqonga akude nonxweme.

Umzobo 4. Amandla okusebenza ahambelanayo kwiimpawu eziphambili zeDacromet.

7. Imigangatho, amaBanga kunye neziKhokelo zokuKhetha

Imigangatho yeDimensional edla ngokubhekiselwa kuyo ibandakanya iDIN 6921 kunye ne-ISO 4162 (ihexagon flange bolts) kunye nemigangatho yesizwe elinganayo efana ne-GB/T 5787. Iiklasi zepropathi zoomatshini ezibonelelwa rhoqo nge-Dacromet coating yi-8.8, 10.9 kunye ne-12.9 ngokwe-ISO 898-1 ISO.898-1. Ukusebenza kokugquma kudla ngokuchazwa nokuba bubunzima bokugquma (iBanga A ≈ 24 g/m², iBanga B ≈ 36 g/m²) okanye ubuncinane benani leeyure zokutshiza ityuwa. Iimoto ezininzi ze-OEM kunye neenkcukacha zesakhiwo zikhetha ngokucacileyo iinkqubo ze-zinc-flake kwiibholiti zamandla aphezulu ngokuchanekileyo kuba ziphelisa umngcipheko we-hydrogen-embrittlement.

Iingcebiso ezisebenzayo zokukhetha:

1. Khetha iklasi yokusebenza yokwaleka ngokodidi olulindelekileyo lokubola kokusingqongileyo (ISO 9223 C3–C5 okanye ngaphezulu).
2. KwiBanga le-10.9 nangaphezulu, cacisa i-Dacromet okanye i-zinc-flake coating efanayo kunokuba i-electroplating eqhelekileyo.
3. Xa ukuchaneka kwe-torque yendibano okanye ukuqiniswa kwezinto ezininzi kubalulekile, cela i-topcoat elawulwayo (i-coefficient ye-friction 0.10-0.18).
4. Phatha kwaye ufake iibholiti ngononophelo ukuphepha ukonakala komatshini kwifilimu yokwambathisa ethambileyo.

8. Isiphelo

Iibholiti ze-Dacromet flange zibonelela ngolungelelwaniso olubalaseleyo lwamandla omatshini aphezulu, ukhuseleko lwexesha elide lokutya, ukuchaneka komda kunye nokhuseleko lokusebenza. Ngokususa umngcipheko we-hydrogen embrittlement kunye nokuhambisa ubomi benkonzo yeminyaka emininzi nakwiindawo ezinobundlobongela, banciphisa iindleko zokugcinwa kunye nokwandisa ukuthembeka kwesakhiwo kuwo wonke amacandelo eemoto, ahlaziyekayo, amashishini kunye neziseko zophuhliso. Ukucaciswa okucacileyo komgangatho ofunekayo womatshini, umgangatho we-dimensional, iklasi yokusebenza yokugqoka kunye naziphi na iimfuno ze-topcoat ziqinisekisa ukuba i-fasteners iya kwenza njengoko kujoliswe kuyo ebomini babo bonke benkonzo.