GEOMET® (Jumete) Coated Hexagonal Bolts-Technical Kenyelletso 

1. Kenyelletso ea GEOMET® (久美特) Coating

GEOMET® (e tsejoang haholo ka Sechaena e le 久美特 kapa Jumete) ke sekoaelo sa folake sa zinki-aluminium se se nang chromium se thehiloeng metsing se entsoeng ke NOF Metal Coatings Group e le mohlahlami ea se nang tikoloho ea ts'ebetso ea DACROMET® ea setso. E fana ka ts'ireletso e ikhethang ea kutu bakeng sa li-fasteners tsa tšepe, haholo-holo liboutu tsa hexagonal, ha e ntse e latela ka botlalo melaoana ea sejoale-joale ea tikoloho joalo ka RoHS, REACH, ELV (2000/53/EC) le ISO 10683.

Ho roala ho entsoe ka zinki e sa sebetseng le li-flakes tsa aluminium tse tlanngoeng ke matrix a inorganic. E sebelisoa ka mekhoa ea dip-spin kapa spray mme e phekoloa ka mocheso o batlang o le tlase, GEOMET® e etsa filimi e tšesaane ea tšepe ea silevera-gray (ka tloaelo 6-12 μm) e sa ameng haholo litekanyo tsa khoele kapa ho lekana. Hobane ts'ebetso ena ha e na electrolytic, e felisa ka ho feletseng kotsi ea hydrogen embrittlement-e leng molemo oa bohlokoa bakeng sa li-bolts tse matla (lihlopha tsa thepa 8.8, 10.9 le 12.9).

1.1 Melemo ea Bohlokoa ea GEOMET®

• Ha e na chromium ka botlalo (ha e na Cr⁶ kapa Cr³⁺) hape e thehiloeng metsing - tlhahiso e ikarabellang tikolohong.
• Khanyetso e ntle ea ho fafatsa letsoai: lihora tse 720-1500+ (ISO 9227 / ASTM B117) ho latela maemo le botenya.
• Ha ho na hydrogen embrittlement - e loketseng li-fasteners tse phahameng.
• Filimi e nyenyane (≈ 8 μm ka karolelano) - ha e kena-kenane le kopano ea bolt-nut kapa litekanyetso tsa torque.
• Ho ba le botsitso bo botle ba mocheso ho fihlela ho 300 ° C le ho hanyetsa maro a koloi, li-solvents le cyclic corrosion.
• Conductivity ea motlakase le ho lumellana ha bimetallic le aluminium.
• E amohetsoe ke li-OEM tse kholo: Toyota, Honda, VW, BMW, GM, Ford, Daimler, Fiat, joalo-joalo.

1.2 Mephato e ka Sehloohong ea GEOMET®

Letlapa la 1 - Papiso ea Mekhoa e Tloaelehileng ea GEOMET® Coating Systems

Tlhokomeliso: Ts'ebetso ea 'nete e ipapisitse le boima ba 'mele (hangata> 24 g/m²), ho lokisoa ha substrate, le li-topcoat tsa PLUS® tsa boikhethelo tse ntlafatsang khokahanyo (μ ≈ 0.06–0.20 ho ISO 16047).

2. Li-Bolts tsa Hexagonal - Moqapi le Maemo

Liboutu tsa hlooho tsa hexagonal (hex) ke tse ling tsa li-fasteners tse sebelisoang haholo ka mochini. Hlooho ea bona e mahlakoreng a tšeletseng e lumella ho tiisa habonolo ka li-wrenches kapa li-sockets tse tloaelehileng le ho fana ka sebaka se seholo sa ho beha. Ha li kopantsoe le coating ea GEOMET®, liboutu tsena li fana ka matla a phahameng a mochini le khanyetso e phahameng ea nako e telele ea kutu.

2.1 Maemo a Macha a Machabeng

• ISO 4014 / DIN 931 - Liboutu tsa hlooho tsa hexagon tse nang le khoele e sa fellang (shank tlas'a hlooho).
• ISO 4017 / DIN 933 - Likurufu tsa hlooho tsa Hexagon li khoele ka botlalo.
• TS ISO 898-1 Mechini ea li-fasteners tse entsoeng ka tšepe ea carbon le alloy steel (lihlopha tsa thepa 4.6 ho 12.9).
• ISO 10683 - Liaparo tsa zinc tse sa sebelisetsoeng ka motlakase holim'a li-fasteners (li sebetsa ka kotloloho ho GEOMET®).
• ASTM F1136 / F1136M - Zinc / Aluminium Corrosion Protective Coatings bakeng sa Fasteners.

2.2 Mekhatlo ea Thepa ea Mechini (ISO 898-1)

Letlapa la 2 - Lihlopha tse Tloaelehileng tsa Thepa bakeng sa Steel Hex Bolts

Ho roala ha GEOMET® ho bohlokoa ka ho khetheha bakeng sa lihlopha tsa 10.9 le 12.9 hobane ts'ebetso e se nang motlakase e qoba ho hlahisa hydrogen e ka hlahang ka mokhoa o tloaelehileng oa electro-galvanizing.

2.3 Tloaelehileng Dimensional Ranges

Metric hexagonal bolts hangata e fanoa ka bophara ho tloha ho M5 ho ea ho M36 (le e kholoanyane ka kopo). Sekhahla sa khoele se latela letoto la ISO metric coarse. Liboutu tse nang le khoele e sa fellang (ISO 4014) li siea shank e se nang khoele e ntlafatsang matla a ho kuta; liboutu tse nang le khoele e felletseng (ISO 4017) li holisa ho kenella ka mekoting e kentsoeng.

3. Lintlha tsa Ts'ebetso & Litšobotsi tsa Coating

3.1 Lintlha tsa Khanyetso ea Corrosion

Lethathamo la 3 - Ts'ebetso e Tloaelehileng ea Neutral Salt Spray (NSS) (ISO 9227 / ASTM B117)

Liteko tsa cyclic corrosion (mohlala, GMW 14872, SAE J2334, ACT) li boetse li bontša liphello tse babatsehang-ka tloaelo li-cycle 60 kapa ho feta ntle le mafome a khubelu ha li sebelisoa hantle.

3.2 Thepa ea Tlatsetso ea Ts'ebetso

1. Ho hanyetsa mocheso: Ts'ebetso e bolokiloe ka mor'a 100 h ho 180 ° C; e ka sebelisoa ho fihlela ho ≈ 300 °C ka nako e khuts'oane.
2. Ho hanyetsa lik'hemik'hale: Ho hanyetsa hantle mafura, oli, brake fluid, li-coolants le lihlahisoa tse ngata tsa tlhaho (VDA 621-412).
3. Mechini e tšoarellang: Ho hanyetsa ka mokhoa o babatsehang ho ts'enyo ea ho sebetsana le ts'ebetso e mengata ea ho tiisa ha li-topcoats tse tlositsoeng li sebelisoa.
4. Paintability: E lumellana le lipente tse ngata tsa tlhaho le lipente tsa phofo.

3.3 Papiso le Mekhabiso e Meng

Letlapa la 4 - GEOMET® vs. Liaparo tse ling tse tloaelehileng tsa Fastener

4. Likopo le Tataiso ea Khetho

GEOMET®-coated hexagonal bolts e hlalositsoe haholo indastering moo ts'ireletso ea nako e telele ea kutu, ho latela tikoloho le ts'ebetso e tšepahalang ea mochini li hlokahalang ka nako e le 'ngoe.

4.1 Maemo a Tloaelehileng a Kopo

• Likoloi: chassis, suspension, powertrain, fasteners tlas'a 'mele (tse amohetsoeng ke VW, BMW, GM, Toyota, Honda, joalo-joalo).
• Kaho le meaho: meaho ea tšepe, marokho, seporo, litora tsa turbine ea moea.
• Mechini ea temo le ea kaho.
• Libaka tsa motlakase le tsa elektroniki moo conductivity le ho hanyetsa ha kutu li hlokahalang ka bobeli.
• Lisebelisoa tse akaretsang tsa indasteri tse pepesehileng mongobo, letsoai kapa mocheso oa cyclic.

4.2 Likhothaletso tsa Khetho

Ha u hlakisa liboutu tsa hexagonal tsa GEOMET®, nahana ka tse latelang:

1. Sehlopha sa kutu se hlokahalang → khetha GEOMET 321 (e tloaelehileng), 500 (e laoloang ke likhohlano) kapa 720 (ts'ireletso e phahameng).
2. Matla a mochini → khetha sehlopha sa thepa 8.8, 10.9 kapa 12.9 ho latela maemo le polokeho.
3. Mofuta oa khoele → khoele e sa fellang (ISO 4014) bakeng sa manonyeletso a bohlokoahali; khoele e felletseng (ISO 4017) bakeng sa boitlamo bo boholo.
4. Friction coefficient → hlakisa PLUS® topcoat haeba kamano e laoloang ea torque-tension e bohlokoa.
5. Litlhoko tsa tikoloho le tsa taolo → GEOMET® e khotsofatsa RoHS, REACH le ELV ntle le ho lokolloa ho eketsehileng.

4.3 Lintlha tsa Tiisetso ea Boleng

Lisebelisoa tse nang le botumo bo botle li boloka litifikeiti tsa ts'ebetso (ISO 9001) 'me hangata li tšoara litumello tsa OEM (Toyota, GM, joalo-joalo). Botenya ba ho roala, ho khomarela (teko ea teipi), ts'ebetso ea ho fafatsa letsoai le coefficient ea likhohlano li lokela ho netefatsoa ho latela ISO 10683 le lits'oants'o tsa bareki. Ponahalo e bonahalang ke seaparo se tšoanang sa tšepe ea silevera-gray; mefuta e metšo (GEOBLACK®) e fumaneha hape ha aesthetics kapa boitsebahatso bo e hloka.

5. Qetello

GEOMET® (久美特) e nang le liboutu tse hexagonal e kopanya ts'epo e netefalitsoeng ea li-fasteners tsa ISO-standard hex-head tse nang le letlapa la sejoale-joale, le se nang chromium la zinc-aluminium le fanang ka ts'ireletso e ikhethang ea kutu, ho lumellana le tikoloho le tokoloho ho embrittlement ea hydrogen. Ebang li sebelisoa ho chassis ea likoloi, tšepe ea meralo kapa mochini oa indasteri, li-fasteners tsena li fana ka tharollo ea botekgeniki ea boleng bo holimo le ea bopaki ba nako e tlang bakeng sa lits'ebetso tse batloang haholo.

Bakeng sa likhothaletso tse amanang le projeke, litlhaloso tsa ho roala kapa lintlha tsa thepa ea mochini, sheba litekanyetso tsa ISO tse amehang (4014, 4017, 898-1, 10683) le maqephe a data a tekheniki a fanoeng ke NOF Metal Coatings Group kapa bakopi ba lumelletsoeng.