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Sehlopha sa 8.8 Dacromet Hex Bolt -IN 933 | ISO 4014 | Bolt e Felletseng ea Hexagon e nang le Dacromet Anti-Corrosion Coating
2026-07-06
Grade 8.8 Dacromet DIN 933 hex bolt e kopanya matla a mechine a holimo-limo le tšireletso ea ho senya e etellang pele indastering. E amohetsoe haholo mesebetsing ea tšepe ea ka ntle, matla a moea, meaho ea seporo le kaho ea borokho, fastener ena e fana ka ts'ebetso e tšepahalang ea ho koala tlas'a maemo a thata a tikoloho - ntle le kotsi ea hydrogen embrittlement e amanang le mefuta e meng ea electroplated.
Karolo ea 1 - Kutloisiso ea Kereiti ea 8.8
Ho latela ISO 898-1, lebitso la sehlopha sa thepa ea bolt le na le linomoro tse peli tse arohaneng ka ntlha ea decimal. Bakeng sa Kereiti ea 8.8:
Nomoro ea pele (8): E bonts'a 1/100 ea matla a "tensile" ka lebitso ho MPa - ke hore, matla a fokolang a fokolang = 800 MPa.
Nomoro ea bobeli (8): E bonts'a karo-karolelano ea matla a fokolang a chai ho matla a fokolang a × 10 - ke hore, karolelano ea lihlahisoa = 0.80, e bolelang matla a fokolang a chai = 640 MPa.
Thepa ea Mechini
| Thepa | Boleng | Standard | Mokhoa oa Teko |
| Matla a Tensile (mets.) | 800 MPa | ISO 898-1 | Teko ea tensile |
| Yield Strength (min.) | 640 MPa | ISO 898-1 | Teko ea tensile |
| Bopaki ba Khatello ea Maikutlo | 580 MPa | ISO 898-1 | Mojaro oa bopaki |
| Karolelano ea lihlahisoa | 0.80 | ISO 898-1 | Palo |
| Ho thatafala (Vickers) | 245–335 HV | ISO 6507 | Tlhahlobo ea Vickers |
| Hardness (Rockwell) | 22-32 HRC | ISO 6508 | Tlhahlobo ea Rockwell |
| Elongation at Break (mets.) | 12% | ISO 898-1 | Teko ea tensile |
| Matla a Impact (mets.) | 52 J @ -20 °C | ISO 898-1 | Tlhahlobo ea Charpy |
Li-fasteners tsa Grade 8.8 li entsoe ka tšepe e bohareng ea carbon (mohlala, 45 # / SAE 1045) kapa tšepe e tlaase ea alloy (mohlala, 40Cr / SCM435) 'me e tlas'a ho tima le ho futhumatsa mocheso (Q & T) ho fumana boemo bo hlokahalang ba matla. Motsoako oa matla a phahameng a tsitsipano le karolelano ea lihlahisoa tse laoloang li etsa hore liboutu tsa Kereiti ea 8.8 li tšepahale haholo likhokahanong tsa meralo tse kentsoeng pele.
Maemo a Tloaelehileng a Kopo
Kaho ea tšepe: Bolting ea sebopeho ka liforeimi, maballo, li-trusses (BS EN 14399 / ASTM A325-e lekanang).
Lisebelisoa: Mehaho ea borokho, liporo tsa crane, literene tsa balebeli ba litsela tse kholo, likhokahano tsa katoloso.
Matla a ka nchafatsoang: Likhokahano tsa motheo tsa tora ea turbine ea moea, meaho e holang ea letsatsi.
Mechini: Liforeimi tsa metjhini ea sepheo se akaretsang, lisebelisoa tsa temo, ho sebetsana le thepa.
Tsa makoloi (tseo e seng tsa bohlokoa): Ho kenya chassis, 'mele-to-frame, litšehetso tsa bethe ea enjine.
Karolo ea 2 - DIN 933 Hex Bolt Standard
DIN 933 (Deutsches Institut für Normung, Setsi sa Maemo sa Jeremane) e hlalosa litlhokahalo tsa sebopeho le sebopeho sa liboutu tsa hexagon tse khole ka likhoele tse mahoashe tsa metric. Leha e nketsoe sebaka haholo ke ISO 4017 maemong a machabeng, DIN 933 e ntse e le eona e hlahelletseng haholo mabapi le theko ea liindasteri ea Europe le lefats'e.
Lintlha tsa bohlokoa tsa DIN 933
Khoele e felletseng: Bolt e entsoe ka bolelele bohle ba shank - e holisa khokahano ea likhoele le kabo ea mojaro.
Hlooho ya hexagonal: Bophara bo tloaelehileng ho pota-pota-flats bo lumella tšebeliso le li-spanner tse tloaelehileng tsa metric le li-wrenches tsa socket.
Sekhahla sa khoele e mahoashe: Metric coarse pitch (ho ea ka ISO 261) bakeng sa kopano e potlakileng le ho hana ho lokoloha tlas'a vibrate.
Boemo ba mamello: Sehlopha sa sehlahisoa sa A (m ≤ 10d kapa ≤ 150 mm) le sehlahisoa sa B (boholo bo boholo) ho latela ISO 4759-1.
DIN 933 Dimension Reference Tafole
Boitsebahatso ba ho tshwaya
Liboutu tsa DIN 933 Kereiti ea 8.8 li tšoailoe ka hlooho ka letšoao la sehlopha sa thepa "8.8" le letšoao la boitsebahatso la moetsi. Ha Dacromet e koahetsoe, letšoao le eketsehileng kapa tag e ka bontša phekolo ea holim'a metsi.
Karolo ea 3 - Tšireletso ea Dacromet Corrosion
Dacromet (hape e ngotsoe e le Dacrotised kapa DACROMET®) ke theknoloji ea ho roala e nang le metsi e sa sebeliseng chromate, ea zinki le ea aluminium e entsoeng ka metsi e qalileng ke Diamond Shamrock Chemicals. E fana ka tšireletso e ikhethang ea mahlabelo 'me e fetohile phekolo e ratoang ka holim'a metsi bakeng sa liboutu tsa Kereiti ea 8.8 tse sebelisoang lits'ebetsong tsa kantle le tikoloho e mabifi.
Kamoo Dacromet e sebetsang kateng
Thepa e na le li-zinc tse ngata tse fetang le li-flakes tsa aluminium tse kopantsoeng hammoho ke "inorganic chromate-based binder matrix", e sebelisoang ka ho phunya le ho folisoa hoo e ka bang 300 ° C. Sebopeho sa microstructure se etsa tsela e boima bakeng sa lisebelisoa tse senyang, tse fanang ka tšireletso le sehlabelo (galvanic):
Tšireletso ea litšitiso: Likarolo tse teteaneng, tse pota-potlanang li thibela mongobo le li-ion tsa chloride ho fihla karolong e ka tlaase ea tšepe.
Tšireletso ea sehlabelo (galvanic): Li-flakes tsa zinc ha li na thuso ho feta tšepe ea electrochemical; li senya ka mokhoa o khethehileng, li sireletsa mathōko a tšepe a pepenene libakeng tse sehiloeng le libakeng tse senyehileng.
Phello ea ho ipholisa: Lihlahisoa tsa zinc corrosion li tiisa ka mokhoa o itseng liphoso tse nyane tsa ho roala, li lelefatsa bophelo ba ts'ireletso.
Lintlha tsa Ts'ebetso ea Bohlokoa
| Thepa | Dacromet | Hot-Dip Galvanizing | Zinc Electroplating | Phosphating |
| Khanyetso ea Spray ea Letsoai | ≥ 480 h (e ka fihla ho 1000+ h) | 200–500 h | 96–120 h | <72 h |
| Botenya ba ho roala | 6–10 µm | 50-100 µm | 5–15 µm | 5–15 µm |
| Hydrogen Embrittlement | Ha ho letho (ho baka ha ho hlokahale) | Ha ho letho | Kotsi e phahameng | Kotsi e tlase |
| Mamello ea Khoele | Ha e amehe (jase e tšesaane) | Hangata e ameha | Ka kakaretso ho lokile | Ka kakaretso ho lokile |
| RoHS / REACH e lumellana | Ho joalo (hexavalent-Cr-free) | Ee | E fapana | Ee |
| Tšebeliso e Tloaelehilengs | Sebopeho sa ka ntle, tora ea moea, borokho | E boima kantle | Ka tlung/ kganya | Ka hare |
Teko ea ho fafatsa letsoai ka ISO 9227. Botenya bo tloaelehileng ba Dacromet: 6–10 µm. Liphetho li ka fapana ho latela mokhoa o ikhethileng oa sebopeho le mokhoa oa ts'ebeliso.
Maemo a Sebetsang le Litlhaloso
ISO 10683: Liaparo tsa zinc flake tse sa sebelisoeng ka motlakase bakeng sa li-fasteners.
DIN EN ISO 10683: Kamohelo ea Europe ea ISO 10683.
ASTM F1136: Liaparo tse sirelletsang tsa zinki / aluminium bakeng sa li-fasteners.
VDA 235-104: Tekanyetso ea likoloi tsa Jeremane bakeng sa liaparo tsa zinc flake.
Mabapi le Fujirui Metal — Professional Fastener Manufacturer & Exporter
Fujirui Metal e etsa le ho romela li-fasteners tse nepahetseng ho feta tsa 8.8 / 10.9 / 12.9 hex bolts, DIN 933 full-thread bolts, DIN 931 partial-thread bolts, stud bolts le custom fasteners. Likhetho tsa kalafo tse holimo li kenyelletsa Dacromet, Ruspert, hot-dip galvanising, le zinc electroplating. Lihlahisoa tsohle li entsoe ho latela maemo a ISO, DIN, le ASTM ka litifikeiti tse felletseng tsa tlhahlobo ea thepa (MTC).
