I-GEOMET® (Jumete) Ifakwe kwi-Hexagonal Bolts-Technical Introduction 

1. Intshayelelo kwi-GEOMET® (久美特) Ukwaleka

I-GEOMET® (eyaziwa kakhulu ngesiTshayina njenge-久美特 okanye i-Jumete) i-chromium-free, i-zinc-aluminium flake esekelwe emanzini ifakwe emanzini ephuhliswe yi-NOF Metal Coatings Group njengomlandeli ohambelana nokusingqongileyo kwinkqubo yendabuko yeDACROMET®. Ibonelela ngokugqwesileyo kokukhuselwa kwe-corrosion kwi-fasteners yensimbi, ngokukodwa iibholiti ezine-hexagonal, ngelixa ithobela ngokupheleleyo imimiselo yendalo yendalo efana ne-RoHS, i-REACH, i-ELV (2000/53/EC), kunye ne-ISO 10683.

I-coating iqukethe i-zinc passivated kunye neeflakes ze-aluminium eziboshwe yi-matrix ye-inorganic. Isetyenziswa ngeendlela zediphu okanye isitshizi kwaye inyangwe kumaqondo obushushu aphantsi ngokwentelekiso, i-GEOMET® yenza ifilimu ecekethekileyo yesilivere-engwevu yesinyithi (ngokuqhelekileyo i-6–12 μm) engachaphazeli kakhulu imilinganiselo yentambo okanye ilingane. Ngenxa yokuba inkqubo ayinayo i-electrolytic, iphelisa ngokupheleleyo umngcipheko we-hydrogen embrittlement-inzuzo ebalulekileyo kwiibhotshi eziphezulu (iiklasi zepropathi 8.8, 10.9 kunye ne-12.9).

1.1 Izinto eziluncedo eziPhambili zeGEOMET®

• Ayina-chromium ngokupheleleyo (akukho Cr⁶ okanye Cr³⁺) kwaye isekwe emanzini - ukwenziwa kwemveliso enoxanduva kokusingqongileyo.
• Ukumelana nokutshiza kwetyuwa okugqwesileyo: 720–1500+ iiyure (ISO 9227 / ASTM B117) kuxhomekeke kwibakala kunye nobukhulu.
• Akukho embrittlement ye-hydrogen-ilungele izibophelelo eziphezulu zokuqina.
• Ifilimu encinci (≈ 8 μm i-avareji) - ayiphazamisi indibano ye-bolt-nut okanye ixabiso le-torque.
• Ukuzinza okuhle kwe-thermal ukuya kuthi ga kwi-300 °C kunye nokuchasana nolwelo lwemoto, izinyibilikisi kunye nokubola kwe-cyclic.
• I-conductivity yombane kunye nokuhambelana kwe-bimetallic kunye ne-aluminium.
• Ivunywe ziiOEM ezinkulu: Toyota, Honda, VW, BMW, GM, Ford, Daimler, Fiat, njl.

1.2 Amabanga aphambili eGEOMET®

Itheyibhile 1 - Ukuthelekiswa kweeNkqubo zeCoating eziqhelekileyo zeGEOMET®

Qaphela: Okwenziweyo kuxhomekeke kubunzima bokugquma (ngokuqhelekileyo > 24 g/m²), ukulungiswa kwesubstrate, kunye nokuzikhethela i-PLUS® topcoat ehlengahlengisa ngakumbi umlinganiso wokukhuhlana (μ ≈ 0.06–0.20 nge-ISO 16047).

2. Iibholiti zeHexagonal - Uyilo kunye neMigangatho

Ihexagonal (hex) iibholiti zentloko ziphakathi kwezona zixhasi zisetyenziswa kakhulu ngoomatshini. Intloko yabo emacaleni amathandathu ivumela ukuqiniswa okulula kunye nezitshixo eziqhelekileyo okanye iziseko kwaye inika indawo enkulu yokuthwala. Xa zidityaniswe ne-GEOMET® yokugquma, ezi bholithi zihambisa zombini amandla aphezulu omatshini kunye nokumelana nokugqwesa kwexesha elide.

2.1 IMigangatho yeHlabathi eFanelekileyo

• ISO 4014 / DIN 931 – Iibholiti zeHexagon zentloko ezinemisonto engaphelelanga (i-shank phantsi kwentloko).
• ISO 4017 / DIN 933 – Izikrufu zeHexagon zentloko zithungwe ngokupheleleyo.
• I-ISO 898-1 - Iipropati ze-Mechanical fasteners ezenziwe nge-carbon steel kunye ne-alloy steel (iiklasi zepropathi 4.6 ukuya kwi-12.9).
• I-TS EN ISO 10683 Iingubo ze-zinc flake ezingasetyenziswanga ngombane kwiziqhoboshi (zisebenza ngokuthe ngqo kwi-GEOMET®).
• I-ASTM F1136 / F1136M - I-Zinc / i-Aluminium Corrosion yoKhuseleko yoKhuseleko kwiiFasteners.

2.2 Iiklasi zePropati yoomatshini (ISO 898-1)

Itheyibhile yesi-2 - Iiklasi zeMpahla eziQhelekileyo kwiiBolt zeHex zentsimbi

I-GEOMET® i-coating ibaluleke kakhulu kwiiklasi ze-10.9 kunye ne-12.9 kuba inkqubo engeyiyo i-electrolytic igwema i-hydrogen embrittlement enokuthi yenzeke nge-electro-galvanizing eqhelekileyo.

2.3 Uluhlu lweeDimensional eziqhelekileyo

Iibholiti ze-Metric hexagonal ziqhele ukubonelelwa ngobubanzi ukusuka ku-M5 ukuya ku-M36 (kwaye ezinkulu xa uceliwe). Isandi somsonto silandela i-ISO metric coarse series. Iibholithi zemisonto engaphelelanga (ISO 4014) zishiya i-shank engafundwanga ephucula amandla okucheba; iibholiti ezinemisonto epheleleyo (ISO 4017) yandisa ukubandakanyeka kwimingxuma eteyiweyo.

3. Idatha yokuSebenza kunye neempawu zoKwamba

3.1 Idatha yokuNxhathisa iCorrosion

ITheyibhile 3 – Umgangatho wokuSebenza ngokuPhakamileyo kweTyuwa (NSS) (ISO 9227 / ASTM B117)

Iimvavanyo ze-Cyclic corrosion (umzekelo, i-GMW 14872, i-SAE J2334, UMTHETHO) nayo ibonisa iziphumo ezigqwesileyo-ngokuqhelekileyo imijikelezo ye-60 okanye ngaphezulu ngaphandle kwe-rust ebomvu xa isetyenziswe ngokufanelekileyo.

3.2 IiPropati eziSebenzayo ezongezelelweyo

1. Ukumelana nobushushu: Ukusebenza kugcinwe emva kwe-100 h kwi-180 °C; isebenziseka ukuya kuthi ga kwi-≈ 300 °C ixesha elifutshane.
2. Ukumelana nemichiza: Ukuchasana okulungileyo kumafutha, i-oyile, i-brake fluid, i-coolants kunye ne-solvents ezininzi zezinto eziphilayo (VDA 621-412).
3. Ukuqina komatshini: Ukuchasana okugqwesileyo ekuphatheni umonakalo kunye nemijikelo emininzi yokuqinisa xa kusetyenziswa i-topcoat ethambisayo.
4. Ukupeyinta: Iyahambelana neengubo ezininzi zendalo kunye neepeyinti zomgubo.

3.3 Uthelekiso kunye nezinye iiCoatings

Itheyibhile 4 – GEOMET® vs. Ezinye iiCoatings Coatings eziqhelekileyo

4. Izicelo kunye neziKhokelo zokuKhetha

I-GEOMET®-coated hexagonal bolts ichazwe ngokubanzi kumashishini apho ukhuseleko lwexesha elide lokubola, ukuthotyelwa kokusingqongileyo kunye nokusebenza okuthembekileyo komatshini kuyadingeka ngaxeshanye.

4.1 Iinkalo zeSicelo eziQhelekileyo

• I-Automotive: i-chassis, ukumiswa, i-powertrain, i-fasteners engaphantsi komzimba (ivunywe yi-VW, i-BMW, i-GM, i-Toyota, i-Honda, njl.).
• Ulwakhiwo kunye neziseko ezingundoqo: izakhiwo zentsimbi, iibhulorho, isiporo, iinqaba zomoya.
• Oomatshini bezolimo nokwakha.
• Iindawo ezivaliweyo zombane kunye ne-elektroniki apho i-conductivity kunye ne-corrosion resistance zifuneka zombini.
• Izixhobo jikelele zemizi-mveliso zisesichengeni sokufuma, ityuwa okanye amaqondo obushushu ebhayisekile.

4.2 Iingcebiso zoKhetho

Xa uchaza i-GEOMET® iibholithi ezinehexagonal, qwalasela oku kulandelayo:

1. Udidi olufunekayo lwe-corrosion → khetha i-GEOMET 321 (eqhelekileyo), i-500 (i-friction-controlled) okanye i-720 (ukhuseleko oluphezulu).
2. Amandla omatshini → khetha udidi lwepropathi 8.8, 10.9 okanye 12.9 ngokomthwalo kunye nezinto zokhuseleko.
3. Uhlobo lomsonto → intambo engaphelelanga (ISO 4014) yeejoyinti ezibalulekileyo zokucheba; intambo epheleleyo (ISO 4017) ukwenzela ukudibana okukhulu.
4. I-friction coefficient → cacisa i-PLUS® topcoat ukuba i-torque-tension elawulwayo ibalulekile.
5. Iimfuno zokusingqongileyo kunye nolawulo → I-GEOMET® yanelisa i-RoHS, i-REACH kunye ne-ELV ngaphandle kokukhululwa okongeziweyo.

4.3 Amanqaku oQinisekiso loMgangatho

Abafaki bezicelo zokugquma abahloniphekileyo bagcina iziqinisekiso zenkqubo (ISO 9001) kwaye bahlala bebamba iimvume ze-OEM (iToyota, GM, njl.). Ubukhulu be-coefficient, ukunamathela (uvavanyo lweteyiphu), ukusebenza kwetyuwa-spray kunye ne-friction coefficient kufuneka iqinisekiswe ngokwe-ISO 10683 kunye nemizobo yabathengi. Inkangeleko ebonakalayo yintsimbi efana nesilivere-grey; iintlobo ezimnyama (GEOBLACK®) zikwafumaneka xa i-aesthetics okanye i-identification ifuna.

5. Isiphelo

I-GEOMET® (久美特) iibholiti ezinehexagonal ezigqunyiweyo zidibanisa ukuthembeka komatshini okungqiniweyo kwe-ISO-standardized hex-head fasteners kunye ne-chromium-free zinc-aluminiyam yeflake yokugquma ehambisa ukhuseleko olukhethekileyo, ukuthotyelwa kwendalo kunye nenkululeko kwi-hydrogen embrittlement. Nokuba isetyenziselwa i-chassis yeemoto, intsimbi yolwakhiwo okanye oomatshini bomzi-mveliso, ezi zibophelelo zibonelela ngesisombululo sobuchwephesha kunye nekamva lobungqina bezicelo ezifunwayo.

Ngeengcebiso ezikhethekileyo zeprojekthi, ukucaciswa kweengubo okanye idatha yepropathi yomatshini, jongana nemigangatho ye-ISO efanelekileyo (4014, 4017, 898-1, 10683) kunye namaphepha edatha yobugcisa ekhutshwe yi-NOF Metal Coatings Group okanye abafaki zicelo abagunyazisiweyo.