Li-Dacromet Flange Bolts: Kenyelletso e Felletseng ea Li-Fasteners tse Thibelang Ts'ebetso e Phahameng ea Corrosion

2026-09-14

1. Selelekela

Boenjiniere ba morao-rao le tlhahiso, ho tšepahala ha manonyeletso a bolt e bohlokoa bakeng sa botšepehi ba sebopeho, polokeho le ts'ebetso ea nako e telele. Hangata li-fasteners tsa setso li na le ho bola, haholo-holo libakeng tse thata tse kenyelletsang mongobo, letsoai, lik'hemik'hale kapa mocheso o phahameng. Li-bolts tsa Dacromet flange li rarolla mathata ana ka ho kopanya lesela le khethehileng la zinc-aluminium flake le melemo ea mochini oa moralo oa hlooho ea flange.

Dacromet flange bolt ke sekontiri se phahameng sa ts'ebetso se kopanyang sekontiri se entsoeng ka li-washer ka tlas'a hlooho se nang le seaparo se se nang electrolytic sa zinc-flake se tsejoang e le Dacromet (kapa zinc flake coating systems tse nkiloeng ho eona). Motsoako ona o fana ka khanyetso e ikhethang ea kutu, matla a tsitsitseng a clamping, le tokoloho ho tsoa ho hydrogen embrittlement-e etsa hore e tšoanelehe haholo bakeng sa lits'ebetso tse matla haholo makaleng a likoloi, kaho, a leoatle, matla le indasteri.

2. Dacromet Coating ke Eng?

Dacromet ke mokhoa oa ho roala li-flake oa li-zinc-aluminium tse thehiloeng metsing, tse qapiloeng ka bo-1970. E na le li-zinc le li-flakes tsa aluminium tse fanyehiloeng ka har'a sehokelo sa chromate (kapa se se nang chromium). Ho roala ho sebelisoa ka mekhoa ea dip-spin, spray, kapa qoeliso ebe e phekoloa ka mocheso o phahameng (ka tloaelo ho pota 300 ° C), ho etsa filimi e sireletsang e tšesaane, e teteaneng, e nang le mekhahlelo e mengata.

Litšobotsi tsa bohlokoa tsa coating li kenyelletsa:

Botenya ba filimi: Ka tloaelo 4-12 μm (hangata 6-8 μm), e bolokang mamello e nepahetseng ea khoele.

Tšitiso + tšireletso ea sehlabelo: Li-flakes tsa tšepe tse pota-potiloeng li theha mokoallo oa 'mele ha zinki e fana ka tšireletso ea galvanic (sehlabelo).

Ha ho na hydrogen embrittlement: Ts'ebetso e seng ea electrolytic e qoba ho khetha acid le electrolysis, ho felisa kotsi ea ho robeha ho liehang ho bakoang ke haedrojene ka litšepe tse matla haholo.

Ho hanyetsa mocheso: E tsitsitse ho fihlela ho hoo e ka bang 300°C mocheso o tsoelang pele oa tšebeletso.

Ponahalo: Qetello ea tšepe ea silevera-grey matte.

Hlokomela hore "Dacromet" ke lebitso la khoebo; mekhoa e tšoanang ea zinc-flake (e kang Geomet, e se nang chromium) e sebelisoa haholo kajeno ho finyella melao ea morao-rao ea tikoloho (RoHS, REACH, ELV).

3. Flange Bolts ke Eng?

Bolt ea flange (eo hape e bitsoang "flanged hex head bolt" kapa foreime bolt) e na le letlapa le pota-potileng ka tlas'a hlooho ea hexagonal e sebetsang joalo ka washer e hahelletsoeng kahare. Moralo ona o aba moroalo oa clamping holim'a sebaka se seholoanyane, o fokotsa kotsi ea ho kenella ka har'a thepa e kopantsoeng, e ntlafatsa ho hanyetsa ho thothomela ha thothomelo, 'me hangata e felisa tlhoko ea washer e arohaneng.

Mefuta e tloaelehileng e kenyelletsa:

Hex flange bolts (e tloaelehileng haholo)

Liboutu tsa serrated tsa flange (tse nang le mantsoe a ka tlase ho hlooho bakeng sa ho thibela ho potoloha)

Socket head kapa mefuta e meng e ikhethang ea flange

Ha li kopantsoe le ho roala ha Dacromet, liboutu tsena li fana ka ts'ebetso e phahameng ea mochini le ts'ebetso e ikhethang ea tikoloho.

4. Ha ho bapisoa le Liaparo tse Tloaelehileng

Tafole e latelang e akaretsa liphapang tse tloaelehileng tsa ts'ebetso:

Thepa	Dacromet	Electro-Zinc	Hot-Dip Galv.	Stainless
Setlolo sa letsoai (lihora)	1,000–1,500+	100–300	500–1,000+	Ea tlhaho
Botenya ba ho roala	4–12 μm	5–15 μm	40–100+ μm	N/A
H Kotsi ea Embrittlement	Ha ho letho	Holimo (bakeng sa ≥10.9)	Tlase–Mahareng	Ha ho letho
Boemo ba tšebeletso ea Max.	~300°C	~100–120°C	~200°C	Phahameng
Thread Fit Impact	Nyenyane	Tlase	Bohlokoa	Ha ho letho

Tlhokomeliso: Ts'ebetso ea 'nete e fapana ho ea ka boemo ba ho roala, botenya, topcoat, le maemo a tikoloho. Lisebelisoa tsa zinc-flake tse se nang Chromium (mohlala, Geomet) li fana ka tšireletso e tšoanang ea kutu ha e ntse e kopana le maemo a thata a tikoloho.

5. Libaka tse kholo tsa Kopo

Li-bolts tsa Dacromet flange li sebelisoa haholo likarolong tsa chassis, lisebelisoa tsa ho emisa, lisebelisoa tsa enjene, likopano tsa brake, mekhoa ea ho qeta matla le mehaho ea 'mele. Li mamella letsoai la litsela, ho palama libaesekele tse futhumetseng, ho sisinyeha le mocheso o phahameng oa under-hood ha li ntse li fana ka li-clamp load tse tšepahalang.

Ho marokho, litora tsa phetisetso, meaho ea tšepe, le lits'ebeletso tse lebopong la leoatle, liboutu tsena li fana ka tšireletso ea nako e telele khahlano le kutu ea sepakapaka le ho fokotsa makhetlo a tlhokomelo.

Metheo ea turbine ea moea e kantle ho naha, lisebelisoa tsa ho holisa letsatsi, kaho ea likepe, le lisebelisoa tsa boema-kepe li rua molemo ho tsoa ho khanyetso e phahameng ea ho fafatsa letsoai le bokhoni ba ho apesa li-geometri tse rarahaneng ka mokhoa o ts'oanang.

Lisebelisoa tse pepeselitsoeng menontsha, lik'hemik'hale, mongobo le ho senyeha - joalo ka mechini ea temo, lipompo, li-valve le lisebelisoa tsa ts'ebetso - hangata li hlakisa li-fasteners tse koahetsoeng ke Dacromet bakeng sa bophelo bo bolelele ba ts'ebeletso.

6. Mephato e Tloaelehileng, Maemo, le Tataiso ea Khetho

Lihlopha tsa thepa: Li-bolts tsa Dacromet flange li fumaneha lihlopheng tsa thepa 4.8, 8.8, 10.9, le 12.9 (metric), hammoho le Kereiti ea 5 le Kereiti ea 8 (imperial). Limaraka tse matla haholo (10.9 / 12.9) li rua molemo ka ho khetheha ka ho ba sieo ha kotsi ea hydrogen embrittlement.

Dimensional standards: Litšupiso tse tloaelehileng li kenyelletsa maemo a ISO metric flange bolt, DIN, GB (Chinese), le ASME/ANSI bakeng sa li-inch series.

Litlhaloso tsa Coating: Hangata ts'ebetso e hlalosoa ke boima ba 'mele bo fokolang (mohlala, Kereiti A ≈ 24 g/m², Kereiti ea B ≈ 36 g/m²) le litlhoko tsa ho fafatsa letsoai. Li-topcoats li ka eketsoa bakeng sa lubricity e ntlafalitsoeng, 'mala, kapa tšireletso e eketsehileng ea litšitiso.

Litlhahiso tsa ho khetha: Bapisa mokhoa oa ho roala le sehlopha sa ho senyeha ha tikoloho (mohlala, C3-C5 ho latela ISO 12944). Bakeng sa manonyeletso a matla a phahameng, netefatsa lintlha tsa torque-tension ka seaparo se khethehileng le topcoat. Khetha lisebelisoa tse se nang chromium ha ho hlokahala hore ho tsamaellane le tikoloho.

7. Ho Hloma le ho Nahana ka Sebetsa

Tšoara ka hloko: Le hoja ho roala ho na le ho khomarela hantle, qoba tšenyo e matla ea mochine nakong ea ho sebetsana le ho kenya.

Taolo ea torque: Sebelisa li-coefficients tsa likhohlano tse fanoeng ke morekisi oa ho roala. Sistimi ea "lubricated Dacromet" e hlahisa meroalo e tsitsitseng ea li-clamp ho feta liphahlo tse sa tlotsoang tsa zinki.

Tšebelisano: Dacromet ka kakaretso e lumellana le lisebelisoa tse ngata tsa gasket le ho tiisa 'me e ka penta ho feta tekano ha ho hlokahala.

Tlhahlobo: Tlhahlobo ea pono bakeng sa tsoelo-pele ea ho koahela le tlhahlobo ea ho khomarela (moo ho boletsoeng) e lokela ho ba karolo ea taolo ea boleng.

8. Qetello

Li-bolts tsa Dacromet flange li emela tharollo e tiileng e ntseng e hola, e sebetsang hantle e lekanyang ka katleho ts'ireletso e hlahelletseng ea kutu, ho ts'epahala ha mochini le ho nepahala ha maemo. Ka ho felisa likotsi tsa ho koaheloa ha haedrojene ha ba ntse ba fana ka ts'ebetso ea setlolo sa letsoai se phahametseng haholo ho feta tse tloaelehileng tsa zinc plating, e se e le khetho e ratoang bakeng sa lits'ebetso tse batloang hohle makaleng a makoloi, a matla, a kaho le a indasteri.

Ha melaoana ea tikoloho e ntse e tsoela pele ho tsamaisa ho amoheloa ha sisteme ea zinc-flake e se nang chromium, theknoloji e ntse e tsoela pele ho fetoha ha e ntse e boloka melemo ea eona ea mantlha. Ha ho hlakisoa li-fasteners bakeng sa tikoloho e senyang kapa e phahameng ea mocheso-haholo-holo moo ho hlokahalang litekanyetso tse matla haholo-Dacromet (kapa e lekanang le zinc-flake) li-flange bolts tse koahetsoeng li lokela ho nkoa ka matla e le tharollo e pakoang le e theko e tlaase bophelong ba tšebeletso ea kopano.

Baenjineri le bareki ba khothaletsoa ho ikopanya le barekisi ba li-coating bakeng sa lintlha tse qaqileng tsa lintlha tsa tekheniki, li-coefficients tsa likhohlano le litlaleho tsa tlhahlobo ea letsoai-spray mabapi le sistimi e khethiloeng le litlhoko tsa ts'ebeliso.

Ha ke na. E latelang.

Litaba tsa morao-rao