I-Dacromet Hexagonal Bolts-Intshayelelo eBanzi kwi-High-Performance Corrosion-Resistant Fasteners 

2. Yintoni i-Dacromet Coating?

I-Dacromet yinkqubo yokugquma i-inorganic eyenziwe nge-ultra-fine zinc flakes, i-aluminium powder, kunye ne-chromium-based based (okanye i-chromium-free) binder. Isetyenziswe njenge-dispersion esekelwe emanzini kwaye iphiliswe malunga ne-300 ° C, yenza i-amorphous binder edibanisa i-flakes yentsimbi edibeneyo kwifilimu ekhuselayo. Ubungqingqwa obuqhelekileyo bokugquma buyi-4–8 μm kuphela—ibhityile kakhulu kune-galvanizing yediphu eshushu (50–80 μm)—kodwa ibonelela ngokhuseleko oluphezulu lokuthotywa. Umphezulu ogqityiweyo unembonakalo efanayo yesilivere-ngwevu.

Ukuqamba okungundoqo: i-zinc flakes (i-60-80%) yokukhusela idini, i-aluminium powder (5-15%) kwiipropati zomqobo eziphuculweyo, i-binder ye-inorganic edlula umphezulu, kunye namanzi adibeneyo njenge-carrier medium.

3. Izinto eziluncedo eziphambili zeDacromet Hexagonal Bolts

3.1 Ukumelana noKutya okugqwesileyo

I-4-8 μm yokugqoka i-Dacromet ngokuqhelekileyo imelana neeyure ezingaphezu kwe-1,000-1,200 yokuvavanya ityuwa yetyuwa engathathi hlangothi (ASTM B117) ngaphandle kwe-rust ebomvu-malunga ne-7 ukuya kwi-10 amaxesha okusebenza kwe-electro-galvanizing (ii-100-300 iiyure). Amanqaku akumgangatho ophezulu angadlula iiyure ezingama-2,000. Isakhiwo se-flake esinamanqanaba amaninzi sisebenza njengesithintelo somzimba kunye ne-anode yombingelelo, ukubonelela ngokhuseleko lwexesha elide kwiindawo eziselunxwemeni, kwimizi-mveliso, nakwiindlela zetyuwa.

3.2 Inkululeko kwi-Hydrogen Embrittlement

I-electroplating yemveli ibandakanya i-acid pickling kunye ne-electrolysis, enokuthi ingenise i-hydrogen kwintsimbi ephezulu yamandla kwaye ibangele ukulibaziseka kwe-brittle fracture-ibaluleke kakhulu kwiBanga le-10.9 kunye ne-12.9 bolts. Inkqubo ye-Dacromet isebenzisa kuphela ukucoca ngomatshini kunye nesicelo esingenawo i-electrolytic, ukuphelisa ngokupheleleyo umngcipheko we-hydrogen embrittlement. Oku kuyenza ibe yeyona nto ithandwayo yokugquma kwiibholiti ezinehexagonal zokhuseleko ezibaluleke kakhulu.

3.3 Ukumelana nobushushu okuBalaseleyo

Iingubo ze-Dacromet zihlala zizinzile kwaye zikhusela kumaqondo okushisa aqhubekayo ukuya kwi-300 ° C. Iingubo eziqhelekileyo ze-zinc ziqala ukuthotywa ngaphezulu kwe-70-100 ° C kwaye zingaxobuka kwi-200-300 ° C. Oku kuzinza kwe-thermal kwenza i-Dacromet hexagonal bolts ilungele amagumbi e-injini, iinkqubo zokukhupha, kunye neendawo zokushisa eziphezulu kwimizi-mveliso.

3.4 Uzinzo lweDimensional kunye nokuhambelana kwemisonto

I-ultra-thin, i-conformal i-coating ayiguquli kakhulu imilinganiselo yentambo okanye i-pitch diameter. Amandongomane adityaniswa kakuhle ngaphandle kokucofa okugqithisileyo okuhlala kufunwa emva kokufakwa kwegalvanizing yediphu eshushu. I-coating iphinda ingene kwimingxuma enzulu, i-recesses, kunye neendawo zangaphakathi ezinokuthi i-electroplating ingakwazi ukukhusela ngokuthembekileyo. Ukongeza, ifilimu ibophelela ngokuqinileyo kwi-substrate kwaye iyamkela i-coatings elandelayo yezinto eziphilayo okanye iipeyinti ezinamathele ngokugqwesileyo.

4. Inkqubo yokuVelisa kunye neNgqungquthela

Iibholiti ze-hexagonal ngokuqhelekileyo ziveliswa kwi-medium-carbon okanye i-alloy steel ngesihloko esibandayo okanye i-forging eshushu, ilandelwa yi-thread rolling kunye nonyango lobushushu ukufezekisa iklasi yepropati efunekayo (ngokuqhelekileyo i-8.8, i-10.9, okanye i-12.9). Emva kokucocwa ngokucokisekileyo, i-Dacromet yokwambathisa isetyenziswa ngolu hlobo lulandelayo:

1.Ukulungiswa komphezulu: Ukucoca i-alkaline kunye nokucoca i-abrasive ngomatshini (akukho kucholwa kwe-asidi).

2. Ukusetyenziswa kokugquma: Dip-spin ukuntywiliselwa kwizibophelelo ezininzi okanye ukutshiza kwiindawo ezinkulu; ukutyabeka okugqithisileyo kususwe yi-centrifugation.

3. Ukunyanga: Ukubhaka malunga ne-300-320 ° C kwimizuzu eyi-15-30 ukwenza isakhiwo se-flake esikhuselayo.

4.Idyasi yokuzikhethela: Isitywini okanye isithambiso sinokusetyenziswa ukomeleza ukunganyangeki kokuhlwa kunye nokulawula umlinganiso wokukhuhlana.

5. Izicelo eziqhelekileyo

I-Dacromet hexagonal bolts ichazwe ngokubanzi apho ukuthembeka kwexesha elide phantsi kweemeko ezinobungozi okanye zobushushu obuphezulu kubalulekile:

Iimoto: I-Chassis, ukumiswa, iinkqubo zebrake, izixhobo zekhompatimenti ye-injini, kunye namalungu angaphantsi atyhilwe kwityuwa yendlela.

Amandla omoya kunye nogqithiso lwamandla: Iibholiti zeTower kunye nezibophelelo zesakhiwo kwi-offshore kunye nee-injini zomoya zonxweme.

Ezaselwandle kunye ne-offshore: Idekhi yezixhobo kunye neziseko zeqonga ezivezwe kwisitshizi samanzi anetyuwa ngokuqhubekayo.

Ulwakhiwo & neziseko: Uqhagamshelo lwesakhelo sentsimbi, amacandelo ebhulorho, kunye namalungu olwakhiwo lwangaphandle.

Uloliwe, oomatshini abanzima, i-aerospace & nokhuselo: Amanqaku okuqina aphezulu aphantsi kokungcangcazela, imozulu, kunye noxinzelelo lomatshini.

6. Ukuthelekisa kunye neeNgqungquthela zeMveli

Umahluko ophambili wokusebenza uqaqambisa ukuba kutheni i-Dacromet ikhethwa kwi-bolts ene-hexagonal ephezulu yokusebenza:

Ubukhulu bokugquma: I-Dacromet 4–8 μm  |  Electro-galvanizing 5–15 μm  |  I-Hot-dip galvanizing 50-80 μm

Ukumelana nokutshizwa kwetyuwa (akukho mhlwa obomvu): I-Dacromet ≥1,200 h  |  Electro-galvanizing 100–300 h  |  Ishushu-dip 500–800 h

Umngcipheko we-hydrogen embrittlement: IDacromet – Akukho nanye |  Electro-galvanizing – Phezulu  |  Idiphu eshushu – Phakathi

Ukumelana nobushushu obuphezulu: I-Dacromet ukuya kuthi ga kwi-300°C  |  Electro-galvanizing ≤100°C  |  Idiphu eshushu ≤200°C

Umsonto ulingana: I-Dacromet igcina ukunyamezela okuchanekileyo; ukugalela intsimbi eshushu kudla ngokufuna imbuyekezo yentambo.

7. Imigangatho, amaBanga kunye neeNgcaciso

Iibholiti ze-Dacromet ze-hexagonal zenziwa kwimigangatho yamazwe ngamazwe kuquka i-ISO 4014/4017, i-DIN 931/933, i-ANSI/ASME B18.2.1, kunye ne-GB/T 5782/5783. Iiklasi zepropathi eziqhelekileyo ziyi-4.8, 8.8, 10.9, kunye ne-12.9 (metric) okanye iBanga lesi-5 kunye neBanga lesi-8 (intshi). Izinto eziphathekayo ziquka i-carbon steel kunye ne-alloy steels ezifana ne-35CrMo, i-40Cr, kunye ne-42CrMo. Ubungakanani bobungakanani obuqhelekileyo yi-M5 ukuya kwi-M36 (ubukhulu obukhulu bufumaneka kwizicelo ezikhethekileyo), kwi-full-thread or partial-thread configurations. Ii-OEM ezininzi zeemoto zidwelisa iDacromet okanye i-zinc-flake efanayo yokwaleka njengoko kugqitywe okuvunyiweyo kwizibophelelo zokuqina okuphezulu.

8. Iingqwalasela zokusingqongileyo

Imiqulu yeDacromet yesiNtu iqulethe i-chromium enehexavalent kwisibophelelo. Ngelixa i-coating ephilisiweyo izinzile kwaye inkqubo ivelisa amanzi amdaka amancinci kakhulu kune-electroplating, imimiselo yokusingqongileyo iqhube uphuhliso lwezinye iindlela ezingenazo i-chromium ezifana neGeomet® kunye nezinye iinkqubo ze-zinc-flake zanamhlanje. Ezi zigcina iingenelo zokusebenza eziphambili ze-Dacromet ngelixa zidibana ne-RoHS engqongqo kunye ne-REACH iimfuno.

Ngokubanzi, inkqubo ye-Dacromet ithathwa njengobungane bendalo kunesiqhelo se-electro-galvanizing kuba iphelisa iibhafu ze-asidi, izisombululo ze-cyanide, kunye nonyango olubanzi lwamanzi amdaka. I-chemistry yamanzi iphinda ibangele ukukhutshwa kwe-low volatile organic compound (VOC).

9. Isiphelo

Iibholiti ze-Dacromet ze-hexagonal zibonelela ngesisombululo esiphezulu sokusebenza kwezicelo ezifuna ukuthembeka komatshini kunye nokukhuselwa kwexesha elide. Ukudityaniswa kwabo koqweqwe olucekethekileyo kodwa olusebenza kakhulu, inkululeko epheleleyo kwi-hydrogen embrittlement, ukumelana nobushushu obugqwesileyo, kunye nolawulo oluchanekileyo lwe-dimensional lubenza baxabiseke ngakumbi kwizibophelelo zokuqina kumacandelo eemoto, amandla, elwandle, kunye nolwakhiwo lobunjineli.

Njengoko imimiselo yokusingqongileyo iguquka, i-chromium-free zinc-flake coatings ephuma kwi-teknoloji ye-Dacromet yasekuqaleni iyaqhubeka nokwandisa uluhlu lweendlela ezihambelanayo. Nokuba icaciswe njengeDacromet yakudala okanye iyafana nale mihla, ezi bholiti zigqunywe ngamacala amathandathu zizisa ukuqina okungqiniweyo okwandisa kakhulu ubomi benkonzo kwaye kucuthwe iindleko zokulondolozwa kwimeko engcolisayo kunye nobushushu obuphezulu. Kumalungu abalulekileyo apho ukusilela kungenakukhethwa, i-Dacromet hexagonal bolts ihlala isesinye sezona zisombululo ezinokwethenjelwa kunye nezobuchwepheshe obuphambili obukhoyo namhlanje.