HEX HEAD BOLTS-Selelekela se Felletseng sa Tekheniki Li-Fasteners tse Matla a Phahameng bakeng sa Likopo tse Batlang

2026-08-31

1. Selelekela

Kereiti ea 10.9 Dacromet hexagon head bolts e emela sehlopha sa premium sa li-fasteners tse matla haholo tse sebelisoang haholo likoloing, kaho, matla a moea, mechini e boima, le lits'ebetsong tsa meaho. Liboutu tsena li kopanya litšobotsi tse tharo tsa bohlokoa: ts'ebetso e phahameng ea mochini oa thepa ea 10.9, geometry e feto-fetohang le e ka tšeptjoang ea moralo oa hlooho ea hexagonal, le ts'ireletso e ikhethang ea kutu e fanoeng ke seaparo sa Dacromet (zinc-flake).

2. Sehlopha sa Thepa 10.9 - Matla a Mechini

Sehlopha sa thepa 10.9 se hlalosoa ho ISO 898-1 (Mechanical thepa ea fasteners e entsoeng ka carbon steel le alloy steel - Karolo ea 1: Bolts, screws le studs). Lebitso "10.9" le bonts'a matla a matla a 1000 MPa le karolelano ea chai-to-tensile e ka bang 0.9. Li-fasteners tsena hangata li etsoa ka litšepe tsa alloy tse tingoeng le tse halefileng (mohlala, 35CrMo, 42CrMo, kapa litšepe tsa boron) 'me li loketse lits'ebetso tsa sebopeho se matla le tse matla.

Thepa ea Bohlokoa ea Mechini (ISO 898-1)

Thepa	Lebitso	Bonyane	Yuniti
Matla a tsitsitseng Rm	1000	1040	MPa
Bopaki ba khatello ea maikutlo / chai ea matla Rp0.2	900	940	MPa
Ho imeloa kelellong tlas'a mojaro oa bopaki Sp	830	—	MPa
Elongation ka mor'a ho robeha A	—	9	%
Vickers hardness HV	—	320 - 380	HV
Rockwell hardness HRC	—	32-39	HRC

Ha ho bapisoa le sehlopha sa thepa ea 8.8, Kereiti ea 10.9 e fana ka matla a phahameng a 25-30% a matla le bokhoni bo phahameng haholo ba ho thiba li-clamp. Sena se etsa hore e be khetho e ratoang bakeng sa manonyeletso a bohlokoa ka har'a enjine, chassis, tšepe ea sebopeho, le lisebelisoa tse boima moo ho hlokahalang ho fokotsa boima ba 'mele le ts'ebetso e phahameng.

3. Hexa Bolts — Moralo le Maemo

Liboutu tsa hlooho tsa hexagon (tseo hangata li bitsoang liboutu tsa hex) ke tsona tse sebelisoang ka ho fetesisa tse sebetsang ka ntle. Hlooho e mahlakoreng a tšeletseng e fana ka phetisetso e babatsehang ea torque e nang le li-wrenches tse tloaelehileng tse bulehileng kapa tsa socket 'me e lumella ho fihlella ho tloha mahlakoreng a mangata. Litekanyetso tse peli tsa mantlha tsa machaba li laola metric hex bolts:

ISO 4014 / DIN 931 - E hlophisitsoe ka mokhoa o itseng (shank tlas'a hlooho)
ISO 4017 / DIN 933 - E hlophisitsoe ka botlalo

Liboutu tse nang le khoele e sa fellang (ISO 4014) li ratoa ha sefofane se kuta se lokela ho sebetsa holim'a shank e sa baloang bakeng sa ho kuta e phahameng, kapa ha bolelele bo nepahetseng ba ho koala bo hlokahala. Liboutu tse nang le likhoele tse felletseng li khethiloe bakeng sa ho feto-fetoha ha maemo 'me ha bolelele bo felletseng bo ka kopanya nut kapa lesoba le tlatsitsoeng.

Litekanyo tse Tloaelehileng (Boholo bo Khethiloeng, ISO 4014 / DIN 931)

Boholo ba Lebitso	Sekhahla (mm)	Across Flats s (mm)	Head Height k (mm)	Thread Length b ≤125 mm	Boholo ba Wrench
M8	1.25	13	5.3	22	13
M10	1.5	16/17	6.4	26	16/17
M12	1.75	18/19	7.5	30	18/19
M16	2.0	24	10.0	38	24
M20	2.5	30	12.5	46	30
M24	3.0	36	15.0	54	36

Tlhokomeliso: Bophahamo ba lifolete bo ka fapana hanyane lipakeng tsa letoto la ISO le DIN bakeng sa boholo bo itseng (mohlala, M10 le M12). Kamehla netefatsa maemo a sebetsang bakeng sa kopo. Likarolo tsa sehlahisoa A le B li hlalosa ho mamellana ha dimensional; Mophato oa A o tiile 'me hangata o sebelisoa bakeng sa li-diameter tse nyane.

Melemo ea Hexagon Head Design

Bokhoni ba phetisetso ea torque e phahameng ka lisebelisoa tse tloaelehileng
Ho fihlella hantle libakeng tse koaletsoeng ho tloha likhutlong tse tšeletseng tse ka khonehang
Ho hlahisa chelete e ngata le ho fumaneha hohle
E lumellana le mefuta e mengata ea linate, li-washer le lisebelisoa tsa ho notlela

HEX HEAD BOLTS--A Comprehensive Technical

4. Ho roala ha Dacromet - Tšireletso e tsoetseng pele ea Corrosion

Dacromet ke theknoloji ea ho roala zinki-flake (e qapiloeng ke Metal Coatings International). E na le li-zinc le li-flakes tsa aluminium tse fanyehiloeng ka har'a binder ea inorganic, e sebelisoang ka mekhoa ea dip-spin kapa ea ho fafatsa 'me e phekoloa ka mocheso o ka bang 300-340 °C. Filimi e hlahisoang e tšesaane, e teteaneng, ea silevera-grey e fana ka tšireletso ea mefuta e mengata ea ts'ireletso ntle le kotsi ea hydrogen embrittlement - monyetla oa bohlokoa bakeng sa li-fasteners tse matla tse kang Kereiti ea 10.9 le 12.9.

Litšobotsi tsa Bohlokoa tsa Ts'ebetso

Paramethara	Boleng bo Tlwaelehileng / Tshebetso
Botenya ba ho roala	5 – 15 μm (Kereiti A ≈ 5 μm; Sehlopha sa B ≈ 8 μm)
Sefafatsi sa letsoai se sa nke lehlakore (ASTM B117)	Lihora tse 500 - 1000+ ho ea ho mafome a khubelu (ho itšetlehile ka sehlopha)
Ho hanyetsa mocheso	Ho fihlela ho 300 °C e tsoelang pele (ho roala ho lula ho sireletsa)
Kotsi ea hydrogen embrittlement	Ha ho na (mokhoa o seng oa electrolytic, ha ho na acid pickling)
Coefficient of friction	0.12 - 0.18 (e nang le mefuta e fapaneng ea lubricant joalo ka Dacromet 500)
Ponahalo	Metallic silevera-grey; sekoaelo se ts'oanang esita le likhoeleng

Ha ho bapisoa le Liaparo tse Tloaelehileng tsa Melaetsa e meng

Sebopeho	Electro Zinc	Hot-Dip Galvanizing	Dacromet
Botenya	5–15 μm	40-85 μm	5–15 μm
Sefafatsi sa letsoai (rust e khubelu)	72–240 h	400–800 h	500–1000+ h
H₂ kotsi ea ho ebrittlement	Phahameng	Hlahisa	Ha ho letho
Tšusumetso ea khoele	Tlase	E phahameng (hangata e hloka ho feta)	Nyenyane
E loketse bakeng sa 10.9+	Moedi	Ho hlokahala tlhokomeliso	E kgabane

Hobane ts'ebetso ea Dacromet ha e kenyelle tlhahiso ea electrochemical hydrogen mme ha e na ho khetha acid e matla, ke eona e ratoang (mme hangata e tlamang) bakeng sa Kereiti ea 10.9 le li-fasteners tse phahameng ho latela lintlha tsa likoloi le tsa sebopeho.

5. Melemo e Kopantsoeng & Lisebelisoa tse Tloaelehileng

Ha matla a Kereiti ea 10.9, geometry ea hlooho ea hexagonal, le ho roala ha Dacromet li kopantsoe, fastener e hlahisoang e fana ka tekanyo e ikhethang ea ts'ebetso ea mochini, boiketlo ba kopano, le ho tšoarella ha nako e telele libakeng tse senyang.

Melemo ea Mathomo

1.Bophahamo bo phahameng ba clamp load - bo nolofalletsa meralo e bobebe ea manonyeletso le ho ts'epaha ha holimo tlas'a thothomelo le meroalo e matla.

2.Superior corrosion resistance - ts'ebetso ea spray-spray ea letsoai e feta hole e tloaelehileng ea zinc plating ha e ntse e boloka ho nepahala ha khoele.

3.Hydrogen-embrittlement mahala - tšobotsi ea bohlokoa ea tšireletso bakeng sa li-fasteners tsa tšepe tse matla haholo.

4.Ho ferekana ho laoloang - mefuta e fapaneng ea Dacromet e lubricated e fana ka likamano tse ka tsejoang esale pele tsa torque-tension, ho ntlafatsa kopano ea kopano.

5.Thermal botsitso - e lula e sireletsa mochesong o phahameng o kopanang le likarolo tsa enjene le lisebelisoa tsa indasteri.

Maemo a Tloaelehileng a Kopo

Likoloi: chassis, suspension, engine mounts, powertrain components
Matla a moea: li-flange tsa tora, meaho ea nacelle, liankora tsa motheo
Kaho e matla le meaho: marokho a tšepe, litora tsa phetiso, seporo
Mechini ea temo le ea kaho e sebetsang kantle
Thepa ea metsing le ea maoatle (ka khetho e nepahetseng ea sehlopha)

6. Qetello

Liboutu tsa hlooho tsa Grade 10.9 tsa Dacromet li fana ka motsoako o ka tšeptjoang oa matla a phahameng a tsitsipano, geometry e sebetsang ea ho kenya, le ts'ireletso ea nako e telele ea kutu. Ka ho kopana le litlhoko tse matla tsa mochini tsa ISO 898-1 Sehlopha sa 10.9, se lumellanang le litekanyetso tse theiloeng joalo ka ISO 4014, le ho sebelisa coating e se nang hydrogen-embrittlement-free zinc-flake, li-fasteners tsena li fa baenjiniere tharollo e netefalitsoeng bakeng sa manonyeletso a bohlokoa a pepesehileng khatellong ea mochini le maemo a mabifi.

E fetileng E latelang.

Litaba tsa morao-rao