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Papa 8.8 Dacromet Hex Bolt –IN 933 | ISO 4014 | Hexagon Bolt piha me ka Dacromet Anti-Corrosion Coating
2026-07-06
Hoʻohui ka Grade 8.8 Dacromet DIN 933 hex bolt i ka ikaika mechanical medium-high me ka pale corrosion alakaʻi i ka ʻoihana. Hoʻohana nui ʻia i ka hana kila o waho, ka makani makani, ka hana kaʻaahi, a me ke kūkulu ʻana i ke alahaka, hāʻawi kēia mea hoʻopaʻa i ka hana paʻa pono ma lalo o ke koi ʻana i nā kūlana kaiapuni - me ka ʻole o ka hydrogen embrittlement e pili ana i nā koho koho electroplated.
Mahele 1 — Hoomaopopo i ka Papa 8.8
Wahi a ISO 898-1, ʻelua mau helu i hoʻokaʻawale ʻia e ka helu decimal. No ka papa 8.8:
Helu mua (8): Hōʻike i ka 1/100 o ka ikaika tensile nominal i MPa - ʻo ia hoʻi, ka ikaika tensile liʻiliʻi = 800 MPa.
Helu lua (8): Hōʻike i ka lakio o ka ikaika hua liʻiliʻi i ka ikaika tensile liʻiliʻi × 10 — ʻo ia hoʻi, ka lākiō hua = 0.80, ʻo ia hoʻi ka ikaika hāʻawi liʻiliʻi = 640 MPa.
Na Waiwai Mechanical
| Waiwai | Waiwai | Kūlana | ʻAno hoʻāʻo |
| Ka Paʻa Paʻa (min.) | 800 MPa | ISO 898-1 | Hoʻāʻo tensile |
| Ka ikaika o ka hua (min.) | 640 MPa | ISO 898-1 | Hoʻāʻo tensile |
| Hōʻoiaʻiʻo Haawe Stress | 580 MPa | ISO 898-1 | Haʻawe hōʻoia |
| Laki hua | 0.80 | ISO 898-1 | Heluhelu |
| Paʻakikī (Vickers) | 245–335 HV | ISO 6507 | ʻO ka hoʻāʻo ʻo Vickers |
| Paʻakiki (Rockwell) | 22–32 HRC | ISO 6508 | ʻO ka hoʻāʻo ʻo Rockwell |
| Elongation at Break (min.) | 12% | ISO 898-1 | Hoʻāʻo tensile |
| Paʻa Paʻa (min.) | 52 J @ -20 °C | ISO 898-1 | Hōʻike Charpy |
Hana ʻia nā mea hoʻopaʻa papa 8.8 mai ke kila kalapona waena (e laʻa, 45 # / SAE 1045) a i ʻole ke kila haʻahaʻa haʻahaʻa (e laʻa, 40Cr / SCM435) a ua hoʻopaʻa ʻia i ka hoʻopau ʻana a me ka hoʻomaʻamaʻa ʻana (Q&T) e hoʻokō i ka ʻike ikaika e pono ai. ʻO ka hui pū ʻana o ka ikaika tensile kiʻekiʻe a me ka lakene hoʻohua i hoʻopaʻa ʻia e hilinaʻi nui ʻia nā bolts Grade 8.8 i nā pilina paʻa mua.
Nā Māhele Hoʻohana maʻamau
Hana kila: ʻO ka hoʻopaʻa ʻia ʻana o ka hale i nā papa, nā kaola, nā ʻōpala (BS EN 14399 / ASTM A325-e like).
ʻOihana: ʻO ke alahaka, nā kaʻa crane, nā kiaʻi alanui, nā hui hoʻonui.
Hiki ke hoʻololi i ka ikehu: Nā hoʻohui kumu hale kiaʻi makani makani, nā hale kau ʻana o ka lā.
Mīkini: ʻO nā papa mīkini kumu nui, nā lako mahiʻai, ka lawelawe ʻana i nā mea.
Kaʻa (koʻikoʻi ʻole): Ke kau ʻana i ka chassis, ke kino-i-ke-paʻa, nā kākoʻo o ka ʻenekini.
Mahele 2 — DIN 933 Hex Bolt Standard
ʻO DIN 933 (Deutsches Institut für Normung, German Standards Institute) e wehewehe i nā koi a me nā geometric no nā bolts hexagon piha piha me nā kaula metric pitch. ʻOiai ua hoʻololi nui ʻia e ISO 4017 ma ka pae honua, ʻo DIN 933 ka mea i hoʻohālikelike ʻia i ka kūʻai ʻana i nā ʻoihana ʻEulopa a me ka honua.
Nā hiʻohiʻona nui o DIN 933
Pili piha: Hoʻopili ʻia ka bolt ma kona lōʻihi holoʻokoʻa - e hoʻonui i ka hoʻopili ʻana o ka milo a me ka hāʻawi ʻana i ka ukana.
Poʻo Hexagonal: Hiki ke hoʻohana ʻia me nā ʻāpana metric maʻamau a me nā wrenches maʻamau.
ʻO ke kiʻekiʻe o ka pae milo: Metric coarse pitch (no ISO 261) no ka hui wikiwiki a me ka pale ʻana i ka wehe ʻana ma lalo o ka haʻalulu.
Ka hoʻomanawanui ʻana: Papa huahana A (m ≤ 10d a i ʻole ≤ 150 mm) a me ka pae huahana B (nā nui nui) no ISO 4759-1.
DIN 933 Papa Kuhikuhi Ana
Hōʻailona hōʻailona
ʻO nā bolts DIN 933 Grade 8.8 i hōʻailona ʻia me ka hōʻailona papa waiwai "8.8" a me ka hōʻailona hōʻailona o ka mea hana. Ke uhi ʻia ʻo Dacromet, hiki i kahi hōʻailona hou a i ʻole hōʻailona ke hōʻike i ka mālama ʻana i ka ʻili.
Mahele 3 - Palekana ʻo Dacromet Corrosion
ʻO Dacromet (i kākau pū ʻia ʻo Dacrotised a i ʻole DACROMET®) he chromate-free, zinc-a-aluminium flake-based water-borne coating technology i hoʻokumu mua ʻia e Diamond Shamrock Chemicals. Hāʻawi ia i ka pale corrosion kaumaha nui a ua lilo i mea lapaʻau i makemake ʻia no nā bolts Grade 8.8 i hoʻohana ʻia i nā noi waho a me ka hoʻoweliweli.
Pehea e hana ai ʻo Dacromet
Aia i loko o ka uhi ka nui o ka zinc a me nā ʻāpana alumini i hoʻopaʻa ʻia e kahi matrix chromate-based binder matrix, i hoʻohana ʻia e ka dip-spinning a hoʻōla ʻia ma kahi o 300 °C. Hoʻokumu ka microstructure layered i kahi ala ʻāwīwī no nā mea ʻino, e hāʻawi ana i ka pale a me ka pale ʻana (galvanic):
Pale pale: Paʻa kino nā ʻāpana flake paʻapū i ka makū a me nā ion chloride mai ka hiki ʻana i ka substrate kila.
Palekana (galvanic): ʻOi aku ka maikaʻi o ka Zinc flakes ma mua o ke kila; ʻoi aku ka maikaʻi o ka ʻino ʻana, e pale ana i nā kihi kila i ʻike ʻia ma nā wahi i ʻoki ʻia a me nā wahi i poino.
Ka hopena ho'ōla iā ia iho: Hoʻopaʻa hapa nā huahana Zinc corrosion i nā kīnā liʻiliʻi, hoʻonui i ke ola palekana.
ʻIkepili Hana Nui
| Waiwai | ʻO Dacromet | Hoʻohu wela | Zinc Electroplating | Phosphating |
| Pale Paʻakai | ≥ 480 h (hiki ke hiki i 1000+ h) | 200–500 hola | 96–120 h | < 72 hola |
| Mānoanoa uhi | 6–10 µm | 50–100 µm | 5–15 µm | 5–15 µm |
| Hoʻohāhā ʻana i ka waihā | ʻAʻole (ʻaʻole koi ʻia ka bakena) | ʻAʻohe | Pilikia kiʻekiʻe | pilikia haʻahaʻa |
| Hoʻomanawanui Loko | ʻAʻole pili ʻole (ʻaʻahu lahilahi) | Hoʻopilikia pinepine | Maʻamau OK | Maʻamau OK |
| RoHS / REACH Hoʻokō | ʻAe (hexavalent-Cr-free) | ʻAe | ʻokoʻa | ʻAe |
| Hoʻohana maʻamaus | ʻO waho, hale kiaʻi makani, alahaka | Kaumaha waho | Loko/māmā | Iloko |
ʻO ka hoʻāʻo ʻana i ka paʻakai no ka ISO 9227. ʻO ka mānoanoa Dacromet maʻamau: 6-10 µm. Hiki ke ʻokoʻa nā hopena me ke ʻano kikoʻī a me ke ʻano noi.
Nā Kūlana kūpono a me nā kiko'ī
ISO 10683: ʻAʻole electrolytically i hoʻohana ʻia i ka zinc flake coatings no nā mea hoʻopaʻa.
DIN EN ISO 10683: Hoʻokomo ʻia ʻo ʻEulopa i ka ISO 10683.
ASTM F1136: Zinc/aluminium pale pale ʻino no nā mea hoʻopaʻa.
VDA 235-104: ʻO ke kūlana kaʻa kaʻa Kelemania no ka uhi ʻana i ka zinc flake.
E pili ana i Fujirui Metal — Mea Hana Hoʻopaʻa Paʻa ʻOihana & Mea Hoʻopuka
Hana a hoʻokuʻu aku ʻo Fujirui Metal i nā mea hoʻopaʻa pololei me ka Grade 8.8 / 10.9 / 12.9 hex bolts, DIN 933 bolts full-thread, DIN 931 partial-thread bolts, stud bolts, a me nā mea hoʻopaʻa maʻamau. ʻO nā koho lapaʻau ʻili he Dacromet, Ruspert, hot-dip galvanising, a me ka zinc electroplating. Hana ʻia nā huahana āpau i nā kūlana ISO, DIN, a me ASTM me nā palapala hōʻoia piha piha (MTC).
