Isingeniso se-Dacromet Hexagonal Bolts

2026-09-09

1. Isingeniso

Ebunjiniyela besimanje nasekukhiqizeni, ukwethembeka kokuxhumeka kwemishini kuvame ukuncika kwikhwalithi nokuqina kwezixhumi. Phakathi kwezindlela zokwelapha ezihlukahlukene ezitholakalayo zamabhawodi ensimbi, i-Dacromet coating iye yavela njengobuchwepheshe obuhamba phambili bokuhlinzeka ngokuvikelwa kokugqwala okukhethekile ngaphandle kokuyekethisa amandla emishini. I-Dacromet hexagonal bolts-hexagon head bolts ephathwa ngalezinc-aluminium flake coating ethuthukisiwe-acaciswe kabanzi ezimbonini lapho ukusebenza kwesikhathi eside ngaphansi kwezimo zemvelo ezinzima kubalulekile.

Lesi sihloko sinikeza ukubuka okuphelele kwama-bolts we-Dacromet hexagonal, okuhlanganisa uhlobo lobuchwepheshe bokumboza, inqubo yokukhiqiza, izinzuzo zokusebenza ezibalulekile, ukuqhathanisa nezingubo zendabuko, izinhlelo zokusebenza ezijwayelekile, kanye namazinga embonini afanelekile. Ukuqonda lezi zici kunikeza amandla onjiniyela, abathengi, nezingcweti zokulungisa ukuthi benze izinqumo ezinolwazi lapho kukhethwa izixhumi zezinhlelo zokusebenza ezibalulekile.

2. Iyini I-Dacromet Coating?

I-Dacromet (uphawu lokuhweba olubhalisiwe oseluphenduke incazelo ejwayelekile yobuchwepheshe) iwuhlelo olungenawo ugesi, i-inorganic zinc-flake coating system. Iqukethe ikakhulukazi i-ultra-fine zinc namaflake e-aluminium ahlakazwe kusibophezelo esisekelwe emanzini esiqukethe izinhlanganisela ze-chromium. Ngemuva kokufaka isicelo nokuphulukisa, ama-flakes akha isakhiwo se-lamellar esine-multilayered esihlinzeka kokubili umgoqo kanye nokuvikelwa komhlatshelo (i-cathodic) ku-substrate yensimbi engaphansi.

Ngokungafani ne-electroplating evamile noma i-hot-dip galvanizing, inqubo ye-Dacromet ayibandakanyi ukucotshwa kwe-asidi noma ukufakwa kwe-electrolytic. Esikhundleni salokho, izingxenye ngokuvamile zihlanzwa ngomshini, zicwiliswe ngaphakathi noma zifuthwe ngokumiswa okunamanzi okunamathelayo (ngokuvamile kusetshenziswa indlela ye-dip-spin), bese zelashwa cishe ku-300 °C. Ngesikhathi sokwelapha, i-binder yenza i-matrix eqinile ye-inorganic evala ama-flakes ensimbi endaweni futhi ibophe ngokuqinile ensimbi eyisisekelo.

Ifilimu ewumphumela izacile ngokuphawulekayo—imvamisa ingu-4–8 μm kuphela (ama-micrometer)—kodwa inikeza ukumelana nokugqwala okuphindwe kaningana kunezingubo ezivamile ze-zinc ezinogqinsi oluqhathanisekayo noma olukhulu. Ukubukeka okuqediwe kuvame ukufana ne-metallic silver-gray. Okuhlukile kwesimanje, okuhlanganisa amasistimu ancishiswe nge-chrome nangenayo i-chrome (njenge-Geomet), akhuluma ngemithetho eguqukayo yezemvelo kuyilapho kugcinwa izinzuzo zokusebenza eziyinhloko.

3. Amabhawodi Ane-Hexagonal kanye Neqhaza Lokwelapha Okungaphezulu

Amabhawodi angama-hexagonal (abuye abizwe ngokuthi ama-hex head bolts noma izikulufu ze-hexagon head) anekhanda elinezinhlangothi eziyisithupha elivumela i-torque ephezulu ukuthi isetshenziswe ngezikrufu ezijwayelekile noma amasokhethi. Ziphakathi kwezinto zokubopha ezivame ukusetshenziswa kakhulu kwezezakhiwo, ezezimoto, zemishini, nezokwakha. Amabanga asukela kumandla aphansi (isb., isigaba sendawo 4.8) ukuya kumandla aphezulu (8.8, 10.9, 12.9 nangaphezulu), akhiqizwa ngensimbi ye-carbon steel noma i-alloy steel futhi aphathwe ngokushisa ukuze kuzuzwe izakhiwo ezidingekayo.

Ukwelashwa okungaphezulu kubalulekile ngoba insimbi engenalutho isengozini yokugqwala, enganciphisa umthamo wokuthwala umthwalo, ibambe imicu, futhi ekugcineni iholele ekuhlulekeni kwamalunga. Izinketho zendabuko ezifana ne-electro-galvanizing kanye ne-hot-dip galvanizing zinemikhawulo eyaziwayo: ingozi ye-hydrogen embrittlement ezinsimbini zamandla aphezulu, impilo yokugqwala okulinganiselwe ezindaweni ezinolaka, kanye nokuphazamiseka kwe-dimensional okubangelwa ukumbozwa kwe-hydrogen emicu ecolekile. I-Dacromet coating yathuthukiswa ukuze inqobe lezi ziphutha.

4. Izinzuzo ezibalulekile ze-Dacromet Hexagonal Bolts

4.1 I-Superior Corrosion Resistance

Naphezu kogqinsi oluyi-4–8 μm kuphela, i-Dacromet inikeza ukuvikelwa kokugqwala okuvamise ukuba kukhulu ngokuphindwe ka-7–10 kune-electro-galvanizing evamile. Ekuhlolweni kwesifutho sikasawoti esingathathi hlangothi (i-ASTM B117 / ISO 9227), i-Dacromet coating esetshenziswa kahle ivamise ukudlula amahora ayi-1,000 — futhi imvamisa ifinyelela emahoreni ayi-1,200 noma ngaphezulu — ngaphandle kokugqwala okubomvu. Amanye amasistimu asebenza kahle kakhulu afinyelela ubude besikhathi eside. Lokhu kuqina okukhethekile kuvela kusivimbelo sezendlalelo eziningi se-zinc egqagqene namaflake e-aluminium kuhlanganiswe nomthelela wokudlula we-inorganic binder.

4.2 Ukungabikho Kwe-Hydrogen Embrittlement

Enye yezinzuzo ezibaluleke kakhulu zezinsimbi ezinamandla aphezulu ukungabi khona ngokuphelele kwengozi ye-hydrogen embrittlement. Izinqubo zendabuko ze-electroplating zihilela ukuhlanzwa kwe-asidi kanye nokufakwa kwe-cathodic, kokubili okungangenisa i-athomu ye-hydrogen ku-lattice yensimbi. Le hydrogen ingabangela ukubambezeleka kokuphuka kwe-brittle ngaphansi kwengcindezi eqinile—ikakhulukazi eyingozi ezigabeni zezakhiwo ezingu-10.9, 12.9 nangaphezulu. Ngenxa yokuthi inqubo ye-Dacromet ayisebenzisi i-acid pickling noma i-electrolysis, amabhawodi anamandla aphezulu angambozwa ngokuphephile kuyilapho egcina ubuqotho bawo bemishini.

4.3 Ukumelana Nokushisa Okuhle Kakhulu

Izembatho ze-Dacromet zihlala zizinzile futhi zivikela emazingeni okushisa esevisi aqhubekayo afinyelela cishe ku-300 °C (kanye nokuchayeka kwesikhathi esifushane ngisho nangaphezulu). Ama-electroplating avamile ezinc aqala ukuwohloka futhi alahlekelwe ukumelana nokugqwala ngaphansi kuka-100-150 °C. Lokhu kuzinza kwe-thermal kwenza amabhawodi e-Dacromet ane-hexagonal alungele amagumbi enjini, amasistimu e-exhaust, iziko lezimboni, nezinye izindawo ezinezinga lokushisa eliphakeme.

4.4 Ifilimu Elizacile kanye Nokuhambisana Kwentambo

I-coating encane, efanayo igcina ubukhulu bentambo ebalulekile kanye nokubekezelelana. Ngokungafani ne-hot-dip galvanizing, efaka u-50–80 μm noma ngaphezulu futhi ngokuvamile idinga amantongomane amakhulu noma ukujaha intambo yangemuva, amabhawodi ahlanganiswe ne-Dacromet angahlanganiswa namantongomane ajwayelekile ngaphandle kokuphazanyiswa. I-coating iphinde ingene ezinsikeni, izintambo zangaphakathi, namajiyometri ayinkimbinkimbi okunzima ukuwacwebeza ngendlela efanayo ngezindlela ze-electrolytic.

4.5 Ukunamathela Okuqinile Nokukwazi Ukukwazi Ukuphinda Uxhumeke

Ifilimu ye-Dacromet ephulukisiwe inamathela ngokuqinile ku-substrate yensimbi. Iphinde inikeze isisekelo esihle kakhulu samajazi angaphezulu emvelo noma amapende uma kukhona ukufakwa kwekhodi kombala okwengeziwe, ukulawula ukungqubuzana, noma izidingo zobuhle. Amajazi angaphezulu okushayisana okulawulwayo (njengamasistimu e-Dacrolub noma e-Plus) avame ukusetshenziswa ukuze kuzuzwe ubudlelwano obungaguquki be-torque-tension phakathi nokuhlanganisa.

4.6 Izinzuzo Zemvelo kanye Nezinqubo

Ikhemistri esekwe emanzini kanye nenqubo yokufaka iluphu evaliwe ikhiqiza imfucuza eyingozi kakhulu kunemigqa yokucwenga evamile. Nakuba ukwakheka kwe-Dacromet yakudala kuqukethe i-chromium ene-hexavalent, ezinye izindlela zesimanje ezingenayo i-chromium noma ezine-chromium ephansi (i-Geomet nezinye ezifanayo) zihlangabezana neziqondiso eziqinile zemvelo ezifana ne-RoHS, i-ELV, ne-REACH kuyilapho iletha ukusebenza okufanayo.

5. Ukuqhathanisa Nezingubo Zomdabu

Ithebula elilandelayo lifingqa umehluko obalulekile wokusebenza phakathi kwe-Dacromet kanye nezingubo ezimbili ezivamile ze-zinc ezivamile:

Impahla	I-Dacromet	I-Electro-galvanizing	I-Hot-dip Galvanizing
Ukuqina Kokunamathela	4–8 um	5–15 μm	50-80 μm
Isifutho sikasawoti (akukho ukugqwala okubomvu)	≥1,000–1,200 h	100–300 h	500–800 h
I-Hydrogen Embrittlement	Lutho	Ingozi ephezulu	Phansi–phakathi
Ukumelana Nokushisa	Kufika ku-300 °C	≤100 °C	≤200 °C
I-Thread Fit Impact	Okuncane	Phansi	Okubalulekile
Ukufaneleka kwe-HS Bolts	Kuhle kakhulu	Inomkhawulo	Kuphakathi

Ithebula 1. Ukubuka konke okuqhathanisayo kwama-coatings asekelwe ku-zinc ajwayelekile kuma-fasteners.

7. Isiphetho

I-Dacromet hexagonal bolts imele isixazululo esivuthiwe, esisebenza kahle kakhulu sezinhlelo zokusebenza ezidinga ukuvikelwa kokugqwala kwesikhathi eside, ukuzinza kokushisa, kanye nokungabikho kwe-hydrogen embrittlement. I-zinc-aluminium flake yabo encane kodwa esebenza ngempumelelo inqoba imikhawulo eminingi ehlobene ne-electro-galvanizing kanye ne-hot-dip galvanizing, kuyilapho ihlala ihambisana nezidingo ze-dimensional ne-assembly zezixhumi ezinembayo.

Njengoba izimboni ziqhubeka nokuphusha ukuphila kwesevisi ende, ukulungiswa okuncishisiwe, nokuthobela imithetho eqinile yezemvelo, ukwamukelwa kwezindwangu ezithuthukisiwe ze-zinc-flake—kuhlanganise nezinhlobonhlobo zesimanje ezingenakho i-chrome—kulindeleke ukuthi kwande. Konjiniyela nababhali bemininingwane, ukukhetha amabhawodi ane-hexagonal ahlanganiswe ne-Dacromet kuyisu elifakazelwe lokuthuthukisa ukwethembeka okuhlangene endaweni ebolayo, izinga lokushisa eliphezulu, noma elinamandla amakhulu.

Uma kucaciswa lezi zibophelelo, kufanele kuqashelwe ibanga lokunamathela (isisindo sokunamathela), amajazi angawakhetheli okulawula ukungqubuzana, isigaba sempahla yesisekelo, kanye nokuqinisekiswa kokuthobelana nezindinganiso ezifanele zamazwe ngamazwe noma zekhasimende. Ukukhetha okufanele kanye nesicelo esilawulwa yikhwalithi kuqinisekisa ukuthi amandla aphelele okusebenza kobuchwepheshe be-Dacromet ayenzeka enkonzweni.