ʻO GEOMET® (Jumete) i uhi ʻia ʻo Hexagonal Bolts-Technical Introduction 

1. Introduction to GEOMET® (久美特) Coating

ʻO GEOMET® (ʻike nui ʻia ma ka ʻōlelo Kina ʻo 久美特 a i ʻole Jumete) he chromium-free, wai-based zinc-aluminum flake coating i hoʻomohala ʻia e NOF Metal Coatings Group ma ke ʻano he mea hoʻopōmaikaʻi kaiapuni i ke kaʻina hana DACROMET® kuʻuna. Hāʻawi ia i ka pale corrosion koʻikoʻi no nā mea hoʻopaʻa kila, ʻoi aku ka nui o nā bolts hexagonal, ʻoiai e hoʻokō pono ana i nā lula kūlohelohe hou e like me RoHS, REACH, ELV (2000/53/EC), a me ISO 10683.

ʻO ka uhi ʻia me ka zinc passivated a me nā flakes alumini i hoʻopaʻa ʻia e kahi matrix inorganic. Hoʻohana ʻia e nā ʻano dip-spin a i ʻole ka hoʻoheheʻe ʻia a hoʻōla ʻia i nā wela haʻahaʻa, hana ʻo GEOMET® i kahi kiʻiʻoniʻoni ʻoniʻoni ʻoniʻoni metala-hinahina (maʻamau 6-12 μm) ʻaʻole pili i ka nui o ke kaula a kūpono paha. No ka mea he non-electrolytic ke kaʻina hana, hoʻopau loa ia i ka pilikia o ka hoʻoheheʻe ʻana o ka hydrogen-he mea pono nui no nā bolts ikaika kiʻekiʻe (nā papa waiwai 8.8, 10.9 a me 12.9).

1.1 Nā Pōmaikaʻi Nui o GEOMET®

• ʻAʻohe chromium piha (ʻaʻohe Cr⁶ a i ʻole Cr³⁺) a me ka wai - ka hana ʻana i ke kaiapuni.
• Kūleʻa paʻakai maikaʻi loa: 720–1500+ hola (ISO 9227 / ASTM B117) ma muli o ka pae a me ka mānoanoa.
• ʻAʻohe hydrogen embrittlement - kūpono no nā mea hoʻopaʻa kiʻekiʻe.
• ʻO ke kiʻiʻoniʻoni lahilahi (≈ 8 μm awelika) - ʻaʻole ia e hoʻopilikia i ka hui bolt-nut a i ʻole nā koina torque.
• ʻO ke kūpaʻa wela maikaʻi a hiki i 300 ° C a me ke kūʻē ʻana i nā wai kaʻa, nā solvents a me ka corrosion cyclic.
• ʻO ka conductivity uila a me ka hoʻohālikelike bimetallic me ka alumini.
• ʻApono ʻia e nā OEM nui: Toyota, Honda, VW, BMW, GM, Ford, Daimler, Fiat, etc.

1.2 Nā Papa GEOMET® Nui

Papa 1 - Hoʻohālikelike o nā Pūnaehana Coating GEOMET® maʻamau

'Ōlelo Aʻo: Aia ka hana maoli i ke kaumaha o ka uhi ʻana (maʻamau ma mua o 24 g/m²), ka hoʻomākaukau ʻana i ka substrate, a me nā kapa topcoat PLUS® koho e hoʻoponopono hou i ka hoʻohālikelike friction (μ ≈ 0.06–0.20 no ISO 16047).

2. Hexagonal Bolts - Hoʻolālā a me nā kūlana

Hexagonal (hex) poʻo bolts i waena o nā mea hoʻopaʻa mīkini i hoʻohana nui ʻia. ʻO ko lākou poʻo ʻeono ʻaoʻao e ʻae i ka hoʻopaʻa maʻalahi me nā wrenches maʻamau a i ʻole nā ​​kumu a hāʻawi i kahi ʻili nui. Ke hui pū ʻia me ka uhi ʻana o GEOMET®, hāʻawi kēia mau bolts i ka ikaika mechanical kiʻekiʻe a me ke kūpaʻa ʻoi aku ka lōʻihi.

2.1 Nā Kūlana Kūikawā Pili

• ISO 4014 / DIN 931 - Hexagon poʻo bolts me ke kaula ʻāpana (shank ma lalo o ke poʻo).
• ISO 4017 / DIN 933 - Hoʻopili piha ʻia nā wili poʻo hexagon.
• ISO 898-1 - Nā waiwai mīkini o nā mea paʻa i hana ʻia me ke kila kalapona a me ke kila kila (nā papa waiwai 4.6 a 12.9).
• ISO 10683 - ʻAʻole electrolytically i hoʻopili ʻia i ka zinc flake coatings ma nā mea hoʻopaʻa (pili pololei iā GEOMET®).
• ASTM F1136 / F1136M - Zinc / Aluminum Corrosion Pale Palekana no nā mea paʻa.

2.2 Papa Waiwai Mechanical (ISO 898-1)

Papa 2 – Nā Papa Waiwai maʻamau no nā Bolts Hex Steel

He mea waiwai nui ka uhi ʻana o GEOMET® no nā papa 10.9 a me 12.9 no ka mea ke pale aku nei ke kaʻina hana non-electrolytic i ka hydrogen embrittlement hiki ke hana me ka electro-galvanizing maʻamau.

2.3 Nā Kūlana Kūlana maʻamau

Hāʻawi pinepine ʻia nā bolts hexagonal metric i nā anawaena mai M5 a i M36 (a ʻoi aku ka nui ma ke noi). Hoʻopili ka pae milo i ka moʻo kikoʻī ISO metric coarse. ʻO nā pōkiʻi ʻāpana-wili (ISO 4014) waiho ʻia i kahi wili ʻole e hoʻomaikaʻi ai i ka ikaika ʻako; ʻO nā bolts piha piha (ISO 4017) e hoʻonui i ka hoʻopili ʻana i nā lua i paʻi ʻia.

3. ʻIkepili Hana a me nā ʻano o ka uhi ʻana

3.1 ʻIkepili Kūʻai ʻino

Pākuʻi 3 – Nā Hana Paʻakai Kūʻē Kūʻē (NSS) (ISO 9227 / ASTM B117)

Hōʻike nā hoʻāʻo ʻino cyclic (e laʻa, GMW 14872, SAE J2334, ACT) i nā hopena maikaʻi loa - maʻamau he 60 pōʻai a ʻoi aku paha me ka ʻulaʻula ʻole ke hoʻohana pono ʻia.

3.2 Nā Pono Hana Hou

1. Palena wela: Ua mālama ʻia ka hana ma hope o 100 mau hola ma 180 °C; hiki ke hoʻohana a hiki i ≈ 300 °C no nā manawa pōkole.
2. Ke kū'ē kemika: Ke kū'ē maikaʻi i nā wahie, nā aila, ka wai hoʻomaha, nā mea hoʻoluʻu a me nā mea hoʻoheheʻe organik he nui (VDA 621-412).
3. Ka lōʻihi o ka mīkini: Kūʻē maikaʻi i ka mālama ʻana i nā pōʻino a me nā pōʻai paʻa i ka wā e hoʻohana ʻia ai nā topcoats lubricated.
4. Hiki ke pena: Hoʻohālikelike me ka nui o nā mea hoʻonaninani a me nā pena pauka.

3.3 Hoʻohālikelike me nā ʻāpana ʻokoʻa

Papa 4 - GEOMET® vs. Nā mea hoʻopili maʻamau maʻamau

4. Nā Palapala Noi a me nā Koho

Hōʻike nui ʻia ʻo GEOMET®-coated hexagonal bolts i nā ʻoihana kahi e pono ai ka pale ʻana i ka corrosion lōʻihi, ka mālama ʻana i ke kaiapuni a me ka hana mechanical pono i ka manawa like.

4.1 Nā kahua hoʻohana maʻamau

• Kaʻa: chassis, hoʻokuʻu, powertrain, nā mea hoʻopaʻa ma lalo o ke kino (apono ʻia e VW, BMW, GM, Toyota, Honda, etc.).
• Ke kūkulu ʻana a me ka ʻoihana: nā hale kila, nā alahaka, ke kaʻaahi, nā hale kiaʻi makani.
• Nā mīkini mahiʻai a me ke kūkulu hale.
• ʻO nā pā uila a me ka uila kahi e pono ai ka conductivity a me ka pale ʻana i ka corrosion.
• ʻIke ʻia nā mea hana ʻoihana maʻamau i ka haʻahaʻa, ka paʻakai a i ʻole ka wela cyclic.

4.2 Manao Koho

Ke kuhikuhi ʻana i nā bolts hexagonal GEOMET®, e noʻonoʻo i kēia:

1. Pono ka papa corrosion → koho GEOMET 321 (maʻamau), 500 (friction-controlled) a i ʻole 720 (palena kiʻekiʻe).
2. Ka ikaika mīkini → koho i ka papa waiwai 8.8, 10.9 a i ʻole 12.9 e like me ka ukana a me nā kumu palekana.
3. ʻAno milo → lola ʻāpana (ISO 4014) no nā ʻāmi koʻikoʻi; pae piha (ISO 4017) no ka hoʻopili ʻana.
4. ʻO ke koena friction → e kuhikuhi i ka PLUS® topcoat inā he mea koʻikoʻi ka pilina torque-tension.
5. Nā koi kaiapuni a me nā hoʻoponopono → Hoʻopiha ʻo GEOMET® iā RoHS, REACH a me ELV me ka ʻole o ka hoʻokuʻu ʻia.

4.3 Nā memo hōʻoia maikaʻi

Mālama nā mea hoʻopiʻi uhi kaulana i nā palapala hōʻoia (ISO 9001) a paʻa pinepine i nā ʻae OEM (Toyota, GM, etc.). Pono e hōʻoia ʻia ka mānoanoa o ka uhi ʻana, ka hoʻopili ʻana (ka hoʻāʻo ʻana i ka tape), ka hana paʻakai paʻakai a me ka coefficient friction e like me ka ISO 10683 a me nā kiʻi o nā mea kūʻai aku. ʻO ka hiʻohiʻona hiʻohiʻona he ʻano metala hina hina; Loaʻa nā ʻano ʻano ʻeleʻele (GEOBLACK®) i ka wā e pono ai ka aesthetics a i ʻole ka ʻike.

5. Ka hopena

ʻO GEOMET® (久美特) i uhi ʻia hexagonal bolts e hui pū i ka hilinaʻi mechanical i hōʻoia ʻia o ka ISO-standardized hex-head fasteners me ka chromium-free zinc-aluminum flake coating e hāʻawi i ka pale corrosion kūʻokoʻa, ka hoʻokō kūlohelohe a me ke kūʻokoʻa mai ka hydrogen embrittlement. Inā hoʻohana ʻia i loko o nā chassis kaʻa, hana kila a i ʻole nā ​​mīkini ʻenehana, hāʻawi kēia mau mea hoʻopaʻa i kahi hopena ʻenehana maikaʻi a me ka wā e hiki mai ana no nā noi noi.

No nā ʻōlelo aʻoaʻo kikoʻī o ka papahana, nā kikoʻī uhi a i ʻole ka ʻikepili waiwai mechanical, e ʻimi i nā kūlana ISO kūpono (4014, 4017, 898-1, 10683) a me nā pepa ʻikepili i hoʻopuka ʻia e NOF Metal Coatings Group a i ʻole nā mea noi i ʻae ʻia.