Kenyelletso ea Dacromet Hexagonal Bolts

2026-09-09

1. Selelekela

Boenjiniere ba morao-rao le tlhahiso, ho tšepahala ha likhokahano tsa mechine hangata ho itšetlehile ka boleng le ho tšoarella ha li-fasteners. Har'a mekhoa e fapaneng ea phekolo ea holim'a metsi e fumanehang bakeng sa liboutu tsa tšepe, ho roala ha Dacromet ho hlahile e le theknoloji e ka sehloohong ea ho fana ka tšireletso e ikhethang ea kutu ntle le ho senya matla a mochine. Dacromet hexagonal bolts-hexagon head bolts e tšoaroang ka seaparo sena se tsoetseng pele sa zinc-aluminium flake-li hlalosoa ka ho pharaletseng liindastering moo ho sebetsang nako e telele tlas'a maemo a thata a tikoloho ho hlokahala.

Sehlooho sena se fana ka tlhaloso e pharaletseng ea li-bolts tsa hexagonal tsa Dacromet, tse koahelang mofuta oa theknoloji ea ho roala, mokhoa oa ho etsa tlhahiso, melemo ea bohlokoa ea ts'ebetso, ho bapisoa le liaparo tsa setso, likopo tse tloaelehileng, le litekanyetso tsa indasteri tse amehang. Ho utloisisa lintlha tsena ho thusa baenjiniere, bareki le litsebi tsa ho lokisa ho etsa liqeto tse nang le tsebo ha ba khetha li-fasteners bakeng sa lits'ebetso tsa bohlokoa.

2. Dacromet Coating ke Eng?

Dacromet (letšoao la khoebo le ngolisitsoeng le fetohileng tlhaloso e akaretsang bakeng sa thekenoloji) ke mokhoa o sa sebeliseng motlakase, oa inorganic zinc-flake coating system. Haholo-holo e na le zinki e ntle haholo le li-flakes tsa aluminium tse hasantsoeng ka har'a setlamo sa metsi se nang le metsoako ea chromium. Ka mor'a kopo le ho folisa, li-flakes li etsa sebopeho sa lamellar se nang le li-multilayered se fanang ka tšireletso le tšireletso ea sehlabelo (cathodic) ho substrate ea tšepe e ka tlaase.

Ho fapana le mokhoa o tloaelehileng oa electroplating kapa hot-dip galvanizing, ts'ebetso ea Dacromet ha e kenyeletse ho bokella acid kapa ho beha electrolytic. Ho e-na le hoo, likaroloana li hloekisoa ka mokhoa oa mochini, li qoelisoa kapa li fafatsoa ka ho emisoa ha metsi (hangata ho sebelisoa mokhoa oa dip-spin), ebe li folisoa hoo e ka bang 300 ° C. Nakong ea ho phekola, binder e etsa matrix e teteaneng e koalang li-flakes tsa tšepe sebakeng sa eona 'me e tlamahane ka thata ho tšepe ea motheo.

Filimi e hlahisoang e tšesaane ka mokhoa o makatsang — hangata ke 4–8 μm (micrometer) — leha ho le joalo e fana ka khanyetso ea kutu ka makhetlo a 'maloa ho feta masela a tloaelehileng a zinki a botenya bo lekanang kapa bo boholo. Ponahalo e phethiloeng hangata ke tšepe e tšoanang ea silevera-gray. Mefuta e fapaneng ea sejoale-joale, ho kenyeletsoa lisebelisoa tse fokolitsoeng tsa chrome le tse se nang chrome (joalo ka Geomet), li sebetsana le melaoana e fetohang ea tikoloho ha li ntse li boloka melemo ea mantlha ea ts'ebetso.

3. Li-Bolts tsa Hexagonal le Karolo ea Phekolo ea Bokaholimo

Liboutu tsa hexagonal (tseo hape li bitsoang hex head bolts kapa hexagon head screws) li na le hlooho e mahlakore a tšeletseng e lumellang torque e phahameng hore e sebelisoe ka li-wrenches kapa li-sockets tse tloaelehileng. Ke tse ling tsa li-fasteners tse sebelisoang haholo meahong, likoloing, mochining le lits'ebetsong tsa kaho. Mephato e tloha ho matla a tlaase (mohlala, sehlopha sa thepa ea 4.8) ho ea ho matla a maholo (8.8, 10.9, 12.9 le ho feta), e entsoeng ka tšepe ea carbon kapa alloy steel le mocheso oa mocheso ho finyella thepa e hlokahalang ea mechine.

Phekolo ea holim'a metsi e bohlokoa hobane tšepe e se nang letho e kotsing ea ho bola, e ka fokotsang matla a ho jara moroalo, ea hapa likhoele, 'me qetellong ea baka ho hloleha ha manonyeletso. Likhetho tse tloaelehileng tse kang electro-galvanizing le hot-dip galvanizing li na le mefokolo e tsebahalang: kotsi ea hydrogen embrittlement ka litšepe tse matla a phahameng, bophelo bo itekanetseng ba ho senyeha ha maemo a mabifi, le ho kena-kenana ha mahlakore a mabeli ho bakoang ke likhoele tse teteaneng holim'a likhoele tse ntle. Ho roala ha Dacromet ho ile ha ntlafatsoa ho hlola mefokolo ena.

4. Melemo ea Bohlokoa ea Dacromet Hexagonal Bolts

4.1 Khanyetso e Phahameng ea Corrosion

Ho sa tsotellehe botenya ba ho roala ba 4-8 μm feela, Dacromet e fana ka tšireletso ea kutu eo ka tloaelo e leng makhetlo a 7-10 ho feta e tloaelehileng ea electro-galvanizing. Tekong ea ho se nke lehlakore ea letsoai (ASTM B117 / ISO 9227), litlolo tsa Dacromet tse sebelisitsoeng hantle li feta lihora tse 1,000 khafetsa - 'me hangata li fihla lihora tse 1,200 kapa ho feta - ntle le ponahalo ea mafome a khubelu. Litsamaiso tse ling tse sebetsang hantle li fihlela nako e telele le ho feta. Ho tšoarella hona ho ikhethang ho bakoa ke mokoallo oa mekhahlelo e mengata oa li-zinc le li-flakes tsa aluminium tse kopantsoeng hammoho le phello e sa tloaelehang ea setlamo sa inorganic.

4.2 Ho ba sieo ha Hydrogen Embrittlement

E 'ngoe ea melemo ea bohlokoa ka ho fetisisa bakeng sa li-fasteners tse matla haholo ke ho ba sieo ka ho feletseng ha kotsi ea hydrogen embrittlement. Mekhoa ea setso ea electroplating e kenyelletsa ho hloekisa acid le cathodic deposition, tseo ka bobeli li ka kenyang hydrogen ea athomo ka har'a letlapa la tšepe. Hydrojene ena e ka baka ho robeha ha brittle ho liehang tlas'a khatello ea maikutlo-haholo-holo e kotsi lihlopheng tsa thepa ea 10.9, 12.9 le holimo. Hobane ts'ebetso ea Dacromet ha e sebelise ho khetha acid kapa electrolysis, liboutu tse matla haholo li ka koaheloa ka mokhoa o sireletsehileng ha li ntse li boloka botšepehi ba tsona bo felletseng.

4.3 Ho Hanyetsa Mocheso ka Bokhabane

Liaparo tsa Dacromet li lula li tsitsitse ebile li sireletsa mochesong o tsoelang pele oa tšebeletso ho fihlela hoo e ka bang 300 ° C (le ho pepeseha ha nako e khutšoanyane le ho feta). Li-electroplating tse tloaelehileng tsa zinki li qala ho nyenyefatsa le ho lahleheloa ke ho hanyetsa ha kutu hantle ka tlase ho 100-150 °C. Botsitso bona ba mocheso bo etsa hore liboutu tsa Dacromet tse hexagonal e be tse loketseng likarolo tsa enjene, litsamaiso tsa mosi oa mosi, libopi tsa indasteri le libaka tse ling tse phahameng tsa mocheso.

4.4 Filimi e Nyenyane le Tšebelisano ea Khoele

Seaparo se tšesaane, se ts'oanang se boloka boholo ba khoele le mamello. Ho fapana le hot-dip galvanizing, e kenyang 50-80 μm kapa ho feta 'me hangata e hloka linate tse feteletseng kapa ho lelekisa khoele ea ho roala ka morao, liboutu tse koahetsoeng ke Dacromet li ka kopanngoa le linate tse tloaelehileng ntle le tšitiso. Ho roala ho boetse ho kenella ka hare, likhoele tse ka hare, le lijeometri tse rarahaneng tseo ho leng thata ho li pata ka mokhoa o ts'oanang ka mekhoa ea electrolytic.

4.5 Ho khomarela ka matla le ho Recoatability

Filimi e phekotsoeng ea Dacromet e khomarela ka thata ho substrate ea tšepe. E boetse e fana ka motheo o motle bakeng sa li-topcoats kapa lipente tse latelang ha likhoutu tsa mebala, taolo ea likhohlano kapa litlhoko tsa botle li le teng. Li-topcoats tse laoloang (tse kang Dacrolub kapa Plus systems) li sebelisoa hangata ho finyella likamano tse tsitsitseng tsa torque-tension nakong ea kopano.

4.6 Melemo ea Tikoloho le Ts'ebetso

Ts'ebetso ea k'hemistri e thehiloeng metsing le ts'ebetso ea ts'ebetso e koetsoeng e hlahisa litšila tse seng kotsi haholo ho feta mela e tloaelehileng ea ho rala. Le ha liforomo tsa Dacromet tsa khale li na le chromium e hexavalent, mefuta e meng ea sejoale-joale e se nang chromium kapa e tlase-chromium (Geomet le tse ling tse tšoanang) li kopana le litaelo tse thata tsa tikoloho tse kang RoHS, ELV, le REACH ha li ntse li fana ka ts'ebetso e ts'oanang.

5. Papiso le Liaparo tsa Setso

Tafole e latelang e akaretsa liphapang tsa bohlokoa tsa ts'ebetso lipakeng tsa Dacromet le liaparo tse peli tse tloaelehileng tse tloaelehileng tsa zinki:

Thepa	Dacromet	Electro-galvanizing	Ho qoela ka ho chesa Galvanizing
Botenya ba ho roala	4–8 μm	5–15 μm	50-80 μm
Salt Spray (ha ho na mafome a khubelu)	≥1,000–1,200 h	100–300 h	500–800 h
Hydrogen Embrittlement	Ha ho letho	Kotsi e phahameng	E tlase-e itekanetseng
Ho hanyetsa Mocheso	Ho fihlela ho 300 ° C	≤100 °C	≤200 °C
Thread Fit Impact	Nyenyane	Tlase	Bohlokoa
Ho loketse bakeng sa HS Bolts	E kgabane	Moedi	E itekanetseng

Lethathamo la 1. Kakaretso ea papiso ea liaparo tse tloaelehileng tse thehiloeng ho zinki bakeng sa li-fasteners.

7. Qetello

Dacromet hexagonal bolts e emela tharollo e hōlileng tsebong, e phahameng ea ts'ebetso bakeng sa likopo tse hlokang tšireletso ea nako e telele ea kutu, botsitso ba mocheso, le ho ba sieo ha hydrogen embrittlement. Letlapa la tsona le lesesaane empa le sebetsa hantle haholo la zinki-aluminium le hlola mefokolo e mengata e amanang le motlakase o tloaelehileng oa galvanizing le hot-dip galvanizing, ha o ntse o lula o lumellana le litlhoko tsa sebopeho le kopano ea li-fasteners tse nepahetseng.

Ha liindasteri li ntse li tsoela pele ho phehella bophelo ba nako e telele ea litšebeletso, tlhokomelo e fokotsehileng, le ho latela melao e thata ea tikoloho, ho amoheloa ha liphahlo tse tsoetseng pele tsa zinc-ho kenyeletsoa le mefuta ea sejoale-joale e se nang chrome-ho lebelletsoe ho hola. Bakeng sa baenjiniere le bangoli ba litlhaloso, ho khetha "Dacromet-coated hexagonal bolts" ke leano le netefalitsoeng la ho matlafatsa ts'epahalo e kopaneng libakeng tse senyang, tse batang haholo kapa tse matla haholo.

Ha ho hlakisoa li-fasteners tsena, ho lokela ho lebisoa tlhokomelo ho sehlopha sa li-coating (boima ba li-coating), li-topcoats tsa boikhethelo bakeng sa taolo ea likhohlano, sehlopha sa thepa ea motheo, le netefatso ea ho latela melao e amehang ea machaba kapa ea bareki. Khetho e nepahetseng le kopo e laoloang ke boleng e netefatsa hore bokhoni bo feletseng ba ts'ebetso ea theknoloji ea Dacromet bo phethahala tšebeletsong.