Hoo e ka bang li-fasteners tsohle li entsoe ka tšepe ea carbon le alloy, 'me li-fasteners tse akaretsang li lebeletsoe ho thibela kutu. Ho phaella moo, ho roala ha phekolo ea holim'a metsi ho tlameha ho khomarela ka tieo.
Ha e le kalafo ea bokaholimo, batho ka kakaretso ba ela hloko botle le ts'ireletso ea kutu, empa mosebetsi o ka sehloohong oa li-fasteners ke khokahano e tiisang, 'me kalafo e holim'a metsi e boetse e na le tšusumetso e kholo ts'ebetsong ea fastening ea li-fasteners. Ka hona, ha re khetha phekolo ea holim'a metsi, re boetse re lokela ho nahana ka ntlha ea ts'ebetso ea ho tiisa, ke hore, ho lumellana ha torque ea ho kenya le preload.
1. Electroplating
Electroplating ea li-fasteners e bolela hore karolo ea li-fasteners tse lokelang ho kenngoa ka electroplated e qoelisoa ka tharollo e khethehileng ea metsi, e tla ba le metsoako e meng ea tšepe e kentsoeng, e le hore ka mor'a ho feta ka tharollo ea metsi le ea hona joale, lintho tsa tšepe tse ka tharollo li tla fokotseha le ho khomarela. karolo e qoeletseng ya difasteners. Electroplating of fasteners ka kakaretso e kenyelletsa galvanizing, koporo, nickel, chromium, koporo-nickel alloy, joalo-joalo.
2. Phosphating
Phosphating e theko e tlase ho feta galvanizing, 'me ho hanyetsa ha eona ho hobe ho feta ho galvanizing. Ho na le mekhoa e 'meli e sebelisoang haholo ea phosphating bakeng sa li-fasteners, zinc phosphating le manganese phosphating. Zinc phosphating e na le thepa ea ho tlotsa e betere ho feta manganese phosphating, 'me manganese phosphating e na le khanyetso e ntle ea kutu le ho hanyetsa ho roala ho feta ho pola zinki. Lihlahisoa tsa phosphating tse kang li-bolts tsa melamu le linate tsa lienjine, lihlooho tsa cylinder, li-bearings tse ka sehloohong, liboutu tsa flywheel, liboutu tsa mabili le linate, joalo-joalo.
3. Oxidation (e fifala)
Blackening+oiling ke seaparo se tummeng sa li-fasteners tsa indasteri, hobane se theko e tlaase ka ho fetisisa 'me se shebahala se le ntle pele tšebeliso ea mafura e felile. Kaha 'mala o motšo ha o khone ho thibela mafome, o tla rusa hang ka mor'a hore o se ke oa hlola o e-ba le oli. Esita le boteng ba oli, tlhahlobo ea spray ea letsoai e sa nke lehlakore e ka fihla lihora tse 3 ~ 5 feela.
4. Zinki e chesang e chesang
Hot galvanizing ke sekoaelo sa ho hasana ka mocheso moo zinki e futhumatsang hore e be metsi. Botenya ba eona ba ho roala ke 15 ~ 100μm, 'me ha ho bonolo ho e laola, empa e na le khanyetso e ntle ea kutu, kahoo hangata e sebelisoa boenjiniere. Ka lebaka la mocheso oa hot-dip zinc processing, (340-500C) e ke ke ea sebelisoa bakeng sa li-fasteners ka holimo ho grade 10.9. Theko ea hot-dip galvanizing ea li-fasteners e phahame ho feta ea electroplating.
5. Ho kenngoa ha zinki
Ho kenngoa ha zinki ke setlolo se tiileng sa metallurgical thermal diffusion ea phofo ea zinki. Ho tšoana ha eona ho molemo, esita le li-layers li ka fumanoa ka likhoele le likoti tse foufetseng. Botenya ba ho roala ke 10 ~ 110μm, 'me phoso e ka laoloa ka hare ho 10%. Matla a eona a tlamahano le ts'ebetso ea anti-corrosion le substrate ke tse ntle ka ho fetisisa har'a liaparo tsa zinki (electro-galvanizing, hot-dip galvanizing le dacromet). Ts'ebetso ea eona ha e na tšilafalo ebile e na le botsoalle ka ho fetisisa tikolohong. Haeba re sa nahane ka chromium le ts'ireletso ea tikoloho, ha e le hantle ke eona e loketseng ka ho fetisisa li-fasteners tse matla haholo tse nang le litlhoko tse phahameng tsa ho thibela ho bola.
Sepheo se seholo sa phekolo ea holim'a li-fasteners ke ho etsa hore li-fasteners li fumane bokhoni ba ho thibela ho bola, e le ho eketsa ho tšepahala le ho ikamahanya le maemo ha li-fasteners.
Nako ea poso: Dec-08-2022