Unyango loMphezulu kwiiFasteners: IsiKhokelo soBugcisa esiBanzi

Phantse zonke izibophelelo zorhwebo zenziwe ngentsimbi ye-carbon, i-alloy steel, okanye insimbi engenasici. Nokuba kusetyenziswa izixhobo ezinganyangekiyo ku-corrosion, unyango lwangaphezulu luhlala lubalulekile ekwandiseni ukuqina kweebholiti kunye namandongomane kwindawo ezinobundlobongela. Eli nqaku liphonononga iingubo eziqhelekileyo kunye nokusetyenziswa kwazo, ukubonelela iinjineli kunye nabavelisi ngemibono enokusetyenzwa yokusebenza ngokufanelekileyo kwe-fastener.

1. IZinc ene-Electroplated (Zinc Plating)

I-zinc ene-electroplated iyona nto isetyenziswa ngokubanzi kwi-fasteners yentsimbi yorhwebo ngenxa yeendleko zayo kunye ne-aesthetic versatility (efumaneka kwi-drab emnyama okanye yomnquma). Nangona kunjalo, ibonelela ngokumelana nomhlwa okuphakathi, okuhlala iiyure ezingama-72 kuvavanyo olungathathi hlangothi lwesitshizi setyuwa. Ama-sealants akhethekileyo anokwandisa oku kwiiyure ezingama-200 +, kodwa ngamaxesha angama-5-8 eendleko.

Umda obalulekileyo yi-hydrogen embrittlement, ebeka ingozi ekunciphiseni iibholiti zamandla aphezulu (amabanga 10.9 nangaphezulu). Ukubhaka emva kwe-plating kunokunciphisa ukusasazwa kwe-hydrogen, kodwa inkqubo ayifane iphunyezwe ngenxa yobunzima bokusebenza kunye neendleko. Ukongezelela, i-zinc-plated fasteners ibonisa i-torque-to-preload ratios engahambelaniyo, eyenza ukuba ingafaneleki kumalungu abalulekileyo. I-Lubricant post-therapy inokuphucula ukuhambelana kodwa yongeza iindleko.

2. I-Phosphating

I-Phosphating ibonelela ngeendleko ezingezinye ze-zinc plating, nangona i-corrosion resistance resistance. Ukusebenza kuxhomekeke kakhulu kumgangatho weoli emva kokunyanga: i-oyile eqhelekileyo ivelisa iiyure eziyi-10-20 zokuxhathisa isitshizi setyuwa, ngelixa i-oyile ye-premium yandisa oku kwiiyure ezingama-72-96 kwii-2-3 zeendleko.

Iintlobo ezimbini zilawula ukusetyenziswa kwemizi-mveliso:

• I-Zinc Phosphating: Ibonelela ngokutyibilika okuphezulu ukuze kube lula ukudityaniswa.

• I-Manganese Phosphating: I-Excels kwi-corrosion resistance, ukuguga, kunye nokuzinza kwe-thermal (107-204 ° C / 225-400 ° F).

Iziqhoboshi ezifakwe iphosphated zithandwa kukungaguquguquki kwazo okuthembekileyo kwetorque-to-preload, zizenze zilungele iindibano ezibalulekileyo ezifana namacandelo enjini (umzekelo, iirodi zokudibanisa, iibholiti zentloko yesilinda) kunye noqhagamshelo lwentsimbi. Ngokucacileyo, i-phosphating inqanda i-hydrogen embrittlement, iyenza ibe lukhetho olungagqibekanga lweebholiti zamandla aphezulu (ibakala 10.9+).

3. I-oksidi emnyama

I-oksidi emnyama, idibaniswe ne-oyile yokugcoba, inketho yohlahlo lwabiwo-mali kwii-fasteners zoshishino. Ngelixa okubonakalayo kukhangayo xa kufakwe i-oyile, ukuxhathisa kwayo kuncinci-kuhlala kuphela iiyure ezi-3-5 kwiimvavanyo zokutshiza ityuwa xa i-oyile ithotywa. Ukungaguquguquki kwetorque kumbi, kodwa ukusebenzisa igrisi ngexesha lendibano kungakunciphisa oku. Ukusetyenziswa kwayo okuphambili kwizicelo ezingabalulekanga, eziphantsi kweendleko.

4. I-Cadmium Plating

I-Cadmium plating inikezela ukuxhathisa umhlwa okukhethekileyo, ngakumbi kwiindawo ezihlala elwandle. Nangona kunjalo, ubutyhefu bayo obuphezulu kunye neendleko zokucocwa kwamanzi amdaka zenza ukuba i-15-20 ibize kakhulu kune-zinc plating. Usetyenziso luthintelwe kumacandelo awodwa afana nezixhobo zeoyile ekude nonxweme kunye nenqwelomoya yaselwandle, apho ukusebenza kuthethelela iindleko.

5. Ukucwenga kweChromium

I-Chromium plating ibonelela ngokuhlobisa, ukuqina, kunye nokumelana nobushushu (ukuya kuthi ga kwi-650 ° C / 1200 ° F). Nangona kunjalo, ukwamkelwa kwayo kwimizi-mveliso kunqunyelwe ngenxa yokulingana kweendleko kunye nentsimbi engenasici kunye neengozi eziqhubekayo ze-hydrogen embrittlement. I-pre-plating yobhedu kunye ne-nickel layers ziyimfuneko ekukhuseleni umhlwa.

6.Isilivere kunye neNickel Plating

• ISilver Plating: Isebenza njengesithambiso esiluqilima kwaye imelana namaqondo obushushu agqithisileyo (ukuya kuthi ga kwi-871°C/1600°F), ithintela ukurhawuzelela ubushushu obuphezulu (umz., iziqhoboshi ze-aerospace). Izithintelo zeendleko zihlala zinciphisa ukusetyenziswa kwayo kwiintongomane okanye iibholiti ezincinci.

• I-Nickel Plating: Idibanisa ukuxhathisa kokutya kunye ne-conductivity yombane, efanelekileyo kumalungu afana neetheminali zebhetri.

7. Hot-Dip Galvanizing

I-Hot-dip galvanizing ibandakanya ukuntywiliselwa izinto zokuzibopha kwi-zinc etyhidiweyo, ukuvelisa umaleko ongqindilili, onganyangekiyo ku-corrosion (15–100 μm). Nangona kunjalo, ubungakanani obungalinganiyo bokugquma budibanisa intambo, ifuna i-post-galvanizing thread reworking okanye i-nuts oversized-zombini eziphazamisa amandla. Inkqubo ikwanobungozi kokusingqongileyo ngenxa yenkunkuma yezinc kunye nokukhutshwa kwezinto ezikhutshwayo. Ngokucacileyo, ayifanelekanga kwibakala 10.9+ iziqhoboshi ngenxa yomngcipheko woxinzelelo lobushushu.

8. IDacrometUkwaleka

I-Dacromet®, ibonelela ngokukhuselwa okufanayo nge-zinc-aluminium matrix. Basusa i-hydrogen embrittlement kwaye banikezela ngokuhambelana okuphezulu kwe-torque, okubenza ukuba bafaneleke kumandla aphezulu, izicelo zokubola okuphezulu.

9.Abanye

Iingubo ezikhethekileyo ezifana ne-Magni (MAGNI), i-Ruspert (RUSPERT), kunye ne-Tiodize's aluminiyam/i-Teflon hybrids zikhawulelana neemfuno ze-niche, ezibonelela ngokuxhathisa ukunxiba, ukuthambisa, okanye ukunganyanzeli kweekhemikhali.

UNyango olungaphezulu lweeFasteners Steel Steel

• Ukunciphisa amafutha: Kubalulekile ekususeni i-oyile yokuvelisa ephazamisa ukusebenza kunye nobuhle.

• I-Passivation: Yongeza ukuxhathisa kokutya kunye nokuqaqamba komphezulu ngokuntywiliselwa izibophelelo kwi-nitric okanye kwi-citric acid solution.

• I-Electroplating: I-nickel ekhethwayo okanye iingubo ze-zinc ziphucula inkangeleko okanye i-conductivity, nangona i-stainless steel stainless stainless yendalo yokuxhathisa i-corrosion ihlala ikwenza oku kungenasidingo.

Ukuqukumbela

Ukukhetha olona nyango luphezulu lufuna ukulungelelanisa ukuxhathisa ukubola, ukusebenza koomatshini, imigaqo yokusingqongileyo, kunye neendleko. Ukusuka kwi-zinc ye-electroplated kwiindibano zebhajethi ukuya kwiingubo zokusasazwa kwe-thermal kwiinkqubo ezibaluleke kakhulu zobuthunywa, indlela nganye ijongana nemingeni ethile. Iinjineli kufuneka zibeke phambili ukuhambelana neemeko zokusebenza-enoba zilwa nokuvela kwamanzi etyuwa, ubushushu obuphezulu, okanye imithwalo eguqukayo-ukuqinisekisa ukuthembeka kunye nokuphila ixesha elide.

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