Dacromet Flat Washers: A Comprehensive Overview 

1. Nhanganyaya

Flat washers akakosha zvikamu muma mechanical fastening systems. Aya madhisiki akatetepa, akatsetseka ane buri repakati anogovera mutoro webhaudhi kana sikuruu, anodzivirira akabatanidza nzvimbo kubva mukukuvadzwa, uye anovandudza kuvimbika kwekubatanidza. Munzvimbo dzinoita ngura—zvakadai sedziya dzinosangana nehunyoro, munyu wemumugwagwa, makemikari, kana tembiricha dzakakwirira—mawacha esimbi asina kucheneswa kana kuti ane zinc-plated anowanzoita ngura nguva isati yakwana, zvichiita kuti kuderedzwa kwesimba rekusunga, kukundikana kwemajoini, kana kugadzirisa kunodhura.

Kugadzirisa dambudziko iri, kurapwa kwepamusoro kwepamusoro kwakagadzirwa. Pakati pezvinonyanya kushanda ndeye Dacromet kupfeka, zinc-aluminium flake system inoshandiswa zvakanyanya kune flat washers yemotokari, kuvaka, marine, uye kushandiswa kwemaindasitiri. Ichi chinyorwa chinosuma Dacromet flat washers, ichitsanangura tekinoroji yekupfekedza, kiyi zvivakwa, zviyero, zvakanakira, maapplication, uye kuenzanisa nemamwe anopedzisa.

2. Chii chinonzi Dacromet Coating?

Dacromet (DACROMET®) isiri-electrolytic, mvura-based inorganic coating inoumbwa ne zinc uye aluminium flakes yakaparadzirwa muchromate binder. Yakatangwa mu1970s kurwisa ngura yemumugwagwa-munyu pamotokari, inoshandiswa nedhip-spin, spray, kana dip-drain nzira mushure mekudzikisa alkaline uye kuchenesa mechanical (hapana asidi pickling inoshandiswa). Iyo yekupfekedza inobva yaporeswa paanenge 300 ° C, ichibudisa mutete (kazhinji 5-15 μm), yunifomu yesimbi yesirivha-grey film inonamatira zvakasimba kune substrate yesimbi.

Iyo nzira yekudzivirira inoshanda nenzira nhatu dzinoenderana:

1. Barrier protection - kudhumhana zinc uye aluminium flakes inoumba chidziviriro chakaomarara kurwisa unyoro, okisijeni, uye zvinokuvadza.
2. Cathodic (chibayiro) kudzivirira - zinc corrodes zvakasarudzwa, kudzivirira simbi yepasi kunyange kana iyo yakavharwa yakanganisa zvishoma.
3. Passivation -Makomisheni echromium anogadzira akagadzika mafirimu eoxide anononoka kuwedzera kukora uye anobatsira kuvhara zvikanganiso zvidiki.

3. Zvinhu Zvinokosha zveDacromet Flat Washers

3.1 Superior Corrosion Resistance

Mukuedzwa kwemunyu-spray (ASTM B117 / ISO 9227), majasi eDacromet anowanzo kuwana maawa 500-1,000+ pasina ngura yakatsvuka-kazhinji 5-10 nguva yakareba kupfuura yakajairwa zinc electroplating yeukobvu hwakafanana. Huremu hwekupfekedza huremu hwepamusoro (Giredhi B kana misiyano yehukobvu hwepamusoro) inogona kudarika maawa 1,000, inotsigira hupenyu hwesevhisi yemakore 5–15 kana kupfuura munzvimbo dzakaoma dzekunze kana dzepasi.

3.2 High Temperature Resistance

Iyo yekuputira inochengetedza kuvimbika kwayo uye inodzivirira zvinhu zvinosvika pa300 ° C (572 ° F). Izvi zvinoita kuti Dacromet flat washers inokodzera zvikamu zviri padyo neinjini, exhaust masisitimu, mabhureki magungano, uye zvimwe zvinopisa zvinopisa uko zvakajairwa zinc plating yaizopfava, kupepeta, kana kurasikirwa nekuora.

3.3 Hapana Hydrogen Embrittlement

Nekuda kwekuti maitiro acho haasi e-electrolytic uye anodzivirira kunhonga asidhi, Dacromet inounza hapana njodzi yehydrogen embrittlement. Uyu ndiwo mukana wakajeka wewasher ane simba guru (kuoma giredhi 200 HV, 300 HV uye pamusoro) uye kushandiswa pamwe chete nemabhaudhi akasimba (Giredhi 10.9 nepamusoro), uko kutsemuka kwehydrogen-induced kunetsa zvakanyanya nemaitiro echinyakare electroplated kupera.

3.4 Mutete, Uniform Firimu uye Mamwe Mabhenefiti

Iine yakajairwa yakaoma-firimu ukobvu hwe5-12 μm chete, iyo yekupfekedza haichinji zvakanyanya hukuru hwakakomba kana tambo clearances, kuchengetedza chaiyo yakakodzera uye clamping kuita. Zvimwe zvikomborero zvinosanganisira kunamatira kwakasimba kune substrate, kunaka kwekupenda, kudzorwa coefficient ye friction (kunyanya kana topcoat ine lubricated yakaiswa), uye bimetallic inoenderana nearuminiyamu zvikamu.

4. Mitemo, Zvishandiso, uye Zvinotsanangurwa

Dacromet flat washers akagadzirwa kuti aenderane anozivikanwa pasi rose dimensional zviyero, zvinosanganisira DIN 125, ISO 7089, DIN 9021, uye ANSI/ASME B18.22.1. Zvishandiso zvekutanga zvakanyanya kabhoni simbi inopihwa mukuoma mamakisi se100 HV, 140 HV, 200 HV, kana 300 HV; Stainless-simbi shanduro dziripowo kune nyanzvi zvinodiwa. Saizi dzinowanzosiyana kubva kudiki metric madhayamita (M1.6 / Φ1.7 mm) kusvika kuhukuru hukuru (M160 / Φ165 mm uye kupfuura), inofukidza ese akajairwa uye makuru-okunze-diameter (fender) washers. Magiredhi ekupfekedza anowanzo Giredhi A (ringaita 24 g/m²) kana Giredhi B (rinoda kusvika 36 g/m²), rinogaro pihwa nemajasi epamusoro epamusoro ayo anowedzera kunatsiridza lubricity kana kuita ngura. Vatengesi vane mukurumbira vanopa munyu-spray bvunzo mishumo, zviyero zveukobvu, uye zvitupa zvezvinhu.

5. Zvakanakira pamusoro peConventional Coatings

• Hupenyu hwesevhisi hwakawedzerwa -Inoshamisa kuchengetedzwa kwecorrosion zvakanyanya kunoderedza nguva dzekugadzirisa uye kutsiva mutengo.
• Yakachengeteka kune yakakwirira-simba fasteners - kusavapo zvachose kwehydrogen embrittlement njodzi.
• Dimensional precision - iyo firimu yakaonda inochengetedza kushivirira uye kwakaringana tambo yekubatanidzwa.
• Thermal kugadzikana - kushanda kwakavimbika munzvimbo dzakakwirira-tembiricha.
• Favorable lifecycle cost - kunyangwe mutengo wekutanga weyuniti wakakwira pane basic zinc plating, hupenyu hurefu hwesevhisi uye nguva yakaderedzwa kazhinji inoburitsa mutengo wakaderera wevaridzi.

6. Typical Applications

Motokari: Chassis, kumiswa, underbody, exhaust, uye injini-mukamuri zvisungo zvakafumurwa kumugwagwa munyu uye hunyoro. MaOEM mazhinji uye Tier-1 vatengesi vanonyatsoda zinc-flake coatings seDacromet yeakakosha washers uye fasteners.

Kuvaka & Infrastructure: Zvivako zvesimbi zvinongedzo, mabhiriji, tunnels, offshore mapuratifomu, scaffolding, fencing, uye yekunze yekuvaka hardware iyo inofanirwa kumira kwenguva refu yekubuda kunze.

Mamwe masekete: Midziyo yemugungwa neyemahombekombe, michina yekurima neyekuvaka, njanji uye masisitimu ekufambisa, shongwe dzemhepo-simba uye nacelles, zvinhu zvichena nemidziyo, uye magungano eindasitiri anoshanda munzvimbo dzinoora kana kuti dzine mwando wakanyanya.

7. Kuenzanisa neAlternative Coatings

Zinc electroplating haidhuri uye inowanikwa zvakanyanya, asi inopa kushomeka kwemunyu-spray kuramba (kazhinji maawa 72-200) uye inotakura njodzi yehydrogen-embrittlement pazvikamu zvine simba guru.

Kupisa-dip galvanizing inopa yakanakisa dziviriro yekuora uye maitiro ekubaira, asi iyo yakakora yakakora inogona kukanganisa shinda yeshinda uye nedimensional kurongeka, zvichiita kuti isanyanya kukodzera kune chaiyo kana mawachi madiki.

Mamwe zinc-flake masisitimu (semuenzaniso Geomet®) unza mashandiro mukirasi yakafanana neDacromet. Sarudzo yekupedzisira inowanzoenderana neiyo OEM yakatarwa, inowanikwa topcoat sarudzo, uye dunhu rekupa cheni. Pakazere, Dacromet inopa huyero hunoshanda hwehutete hwefirimu ukobvu, yakakwira corrosion kuramba, kugadzikana kwemafuta, uye rusununguko kubva kune hydrogen embrittlement.

8. Mhedziso

Dacromet flat washers inosanganisa mamechanic mabhenefiti eyakajairwa flat washers-mutoro kugovera uye kuchengetedzwa kwepamusoro-ine yepamusoro zinc-aluminium flake coating iyo inopa yakasarudzika corrosion resistance, high-temperature performance, uye kuchengetedzwa kwepamusoro-simba maapplication. Firimu ravo rakatetepa, rakafanana, dzinza remotokari rakaratidzwa, uye hupenyu hurefu hwebasa hunovaita sarudzo inosarudzika muzvikamu zvemotokari, zvekuvaka, zvemugungwa, uye zvakafara maindasitiri.

Kana uchitsanangura mawachi aya, kutariswa kunofanirwa kupihwa kune inodiwa giredhi rekuomarara, dimensional chiyero (DIN, ISO, kana ANSI), uremu hwekuputira kana giredhi, uye chero chinodiwa chetopcoat akaiswa mafuta. Kudyidzana nevagadziri vanogona kupa munyu-spray bvunzo data uye zvitupa zvezvinhu zvinobatsira kuve nechokwadi chekuita kwakavimbika mubasa. Mumashandisirwo apo ngura, kupisa, kana simba rakakwirira zvinhu zvakakosha, Dacromet-yakavharwa flat washers inoramba iri mhinduro yakasimbiswa uye inodhura.

- Kupera kweChinyorwa -