Dacromet Flat Washers: Ib Daim Ntawv Qhia Tag Nrho 

1. Taw qhia

Flat washers yog cov khoom tseem ceeb hauv cov tshuab fastening. Cov nyias nyias, tiaj tus discs nrog lub hauv paus qhov faib cov khoom ntawm lub ntsia liaj qhov rooj lossis ntsia hlau, tiv thaiv cov chaw sib koom los ntawm kev puas tsuaj, thiab txhim kho kev ntseeg tau ntawm kev sib txuas. Nyob rau hauv ib puag ncig corrosive-xws li cov uas raug dej noo, txoj kev ntsev, tshuaj, los yog siab kub-txheej txheem untreated los yog zinc-plated steel washers feem ntau corrode ntxov ntxov, ua rau txo clamping quab yuam, sib koom ua hauj lwm tsis ua hauj lwm, los yog cov nqi kho mob.

Txhawm rau daws qhov teeb meem no, kev kho saum npoo av tau tsim kho. Ntawm qhov zoo tshaj plaws yog Dacromet txheej, zinc-aluminium flake system tau siv dav rau cov tshuab ntxhua khaub ncaws rau tsheb, kev tsim kho, marine, thiab kev lag luam. Kab lus no qhia txog Dacromet flat washers, piav qhia txog cov txheej txheem txheej txheem, cov khoom tseem ceeb, cov qauv, qhov zoo, kev siv, thiab kev sib piv nrog lwm txoj kev ua tiav.

2. Dacromet Txheej yog dab tsi?

Dacromet (DACROMET®) yog ib qho uas tsis yog-electrolytic, dej-raws li inorganic txheej uas muaj zinc thiab txhuas flakes dispersed nyob rau hauv ib tug chromate binder. Keeb kwm tsim nyob rau hauv 1970s los tawm tsam txoj kev- ntsev corrosion ntawm tsheb, nws yog siv los ntawm dip-spin, tshuaj tsuag, los yog dip-drain txoj kev tom qab alkaline degreasing thiab mechanical tu (tsis muaj acid pickling). Cov txheej yog tom qab ntawd kho ntawm kwv yees li 300 ° C, ua rau nyias (feem ntau 5-15 μm), cov xim hlau nyiaj-grey zaj duab xis uas ua rau cov hlau substrate.

Nws tiv thaiv mechanism ua haujlwm nyob rau hauv peb txoj kev ntxiv:

1. Barrier tiv thaiv - overlapping zinc thiab aluminium flakes tsim lub cev ntom ntom tiv thaiv kev ya raws, oxygen, thiab cov kab mob corrosive.
2. Cathodic (sacrificial) tiv thaiv - zinc corrodes nyiam dua, tiv thaiv cov hlau hauv qab txawm tias lub txheej puas me ntsis.
3. Passivation - chromium tebchaw tsim cov oxide zaj duab xis ruaj khov uas ua rau qeeb ntxiv corrosion thiab pab kaw qhov chaw me me.

3. Cov khoom tseem ceeb ntawm Dacromet Flat Washers

3.1 Superior Corrosion Resistance

Hauv kev sim tshuaj ntsev nruab nrab (ASTM B117 / ISO 9227), Dacromet txheej feem ntau ua tiav 500-1,000+ teev yam tsis muaj xeb liab - feem ntau 5-10 npaug ntev dua li cov pa zinc electroplating ntawm cov tuab zoo sib xws. Cov txheej txheej hnyav dua (Qib B lossis cov tuab tuab) tuaj yeem dhau 1,000 teev, txhawb kev pabcuam lub neej ntawm 5-15 xyoo lossis ntau dua hauv qhov hnyav sab nraum zoov lossis hauv qab ib puag ncig.

3.2 Kev kub siab ua haujlwm siab

Cov txheej txheem khaws nws txoj kev ncaj ncees thiab kev tiv thaiv txog li 300 ° C (572 ° F). Qhov no ua rau Dacromet tiaj tus ntxhua khaub ncaws haum rau cov khoom nyob ze ntawm lub cav, lub tshuab tso pa, kev sib tsoo braking, thiab lwm qhov chaw cua sov uas zoo tib yam zinc plating yuav soften, tev, los yog poob corrosion kuj.

3.3 Tsis muaj Hydrogen Embrittlement

Vim tias cov txheej txheem tsis yog electrolytic thiab zam cov kua qaub pickling, Dacromet qhia tsis muaj kev pheej hmoo ntawm hydrogen embrittlement. Qhov no yog qhov kev txiav txim siab zoo rau cov tshuab ntxhua khaub ncaws muaj zog (qib hardness 200 HV, 300 HV thiab siab dua) thiab siv ua ke nrog high-tensile bolts (Qib 10.9 thiab siab dua), qhov twg hydrogen-induced cracking yog ib qho kev txhawj xeeb loj nrog cov tsoos electroplated tiav.

3.4 Nyias, Uniform Zaj duab xis thiab cov txiaj ntsig ntxiv

Nrog rau ib txwm qhuav-zaj duab xis tuab ntawm tsuas yog 5-12 μm, txheej txheej tsis cuam tshuam qhov loj me lossis xov clearances, khaws cia kom haum thiab clamping kev ua tau zoo. Cov txiaj ntsig ntxiv muaj xws li muaj zog adhesion rau substrate, zoo paintability, tswj coefficient ntawm kev sib txhuam (tshwj xeeb tshaj yog thaum lub lubricated topcoat yog siv), thiab bimetallic compatibility nrog txhuas Cheebtsam.

4. Cov qauv, cov khoom siv, thiab cov lus qhia tshwj xeeb

Dacromet flat washers yog tsim los rau cov qauv dav dav thoob ntiaj teb, suav nrog DIN 125, ISO 7089, DIN 9021, thiab ANSI / ASME B18.22.1. Cov ntaub ntawv hauv paus feem ntau yog cov pa roj carbon steel nkag hauv cov qib hardness xws li 100 HV, 140 HV, 200 HV, lossis 300 HV; stainless-steel versions kuj muaj rau cov kev cai tshwj xeeb. Qhov ntau thiab tsawg feem ntau yog los ntawm me me metric diameters (M1.6 / Φ1.7 mm) mus rau qhov loj (M160 / Φ165 mm thiab tshaj), npog ob qho tib si txheem thiab loj-sab nraud-inch (fender) washers. Cov qib txheej feem ntau yog Qib A (kwv yees li 24 g / m²) lossis Qib B (kwv yees li 36 g / m²), feem ntau muab nrog cov txheej txheem sab saum toj uas txhim kho lubricity lossis corrosion. Cov neeg muag khoom muaj koob npe muab cov ntawv qhia tshuaj ntsev-txhaj tshuaj, ntsuas tuab, thiab daim ntawv pov thawj khoom siv.

5. Qhov zoo tshaj li Cov Txheej Txheem Txheej Txheem

• Ntxiv kev pab cuam lub neej - Kev tiv thaiv corrosion ntev heev txo qis txij nkawm thiab hloov cov nqi.
• Safe rau high-strength fasteners - ua tiav tsis muaj hydrogen embrittlement txaus ntshai.
• Dimensional precision - cov yeeb yaj kiab nyias khaws cia ua siab ntev thiab kev sib txuas kom zoo.
• Thermal stability - txhim khu kev qha kev ua tau zoo hauv qhov chaw siab-kub.
• Txaus nyiam lifecycle nqi - Txawm hais tias tus nqi pib pib yog siab dua cov zinc plating, lub neej ntev kev pab cuam thiab txo qis qis feem ntau ua rau tus nqi qis dua ntawm cov tswv cuab.

6. Cov ntawv thov ib txwm

Automotive: Chassis, ncua kev kawm ntawv, hauv qab lub cev, tso pa, thiab lub cav-compartment fasteners raug rau txoj kev ntsev thiab dej noo. Ntau tus OEMs thiab Tier-1 cov neeg muab khoom tshwj xeeb xav tau zinc-flake txheej xws li Dacromet rau cov ntxhua khaub ncaws tseem ceeb thiab cov fasteners.

Kev Tsim Kho & Infrastructure: Kev sib txuas steel hlau, txuas hniav, tunnels, offshore platforms, scaffolding, fencing, thiab sab nraum zoov architectural hardware uas yuav tsum tau tiv thaiv sab nraum lub sij hawm ntev.

Lwm cov sectors: Cov khoom siv hauv hiav txwv thiab ntug dej hiav txwv, kev ua liaj ua teb thiab kev tsim kho tshuab, kev tsheb ciav hlau thiab kev thauj mus los, cua-zog yees thiab nacelles, cov khoom siv dawb thiab cov khoom siv, thiab kev lag luam kev sib koom ua ke ua haujlwm hauv corrosive lossis high-humidity ib puag ncig.

7. Sib piv nrog lwm txheej txheej

Zinc electroplating yog pheej yig thiab dav, tab sis nws muaj kev txwv ntsev-txhaj tshuaj tiv thaiv (feem ntau 72-200 teev) thiab muaj kev pheej hmoo hydrogen-embrittlement ntawm qhov chaw muaj zog.

Kub-dip galvanizing muab kev tiv thaiv corrosion zoo heev thiab kev coj tus cwj pwm tsis zoo, tab sis cov txheej tuab tuab tuaj yeem cuam tshuam nrog cov xov haum thiab qhov tseeb qhov tseeb, ua rau nws tsis tsim nyog rau kev txiav txim me me lossis cov ntxhua khaub ncaws me me.

Lwm cov txheej txheem zinc-flake (piv txwv li Geomet®) xa cov kev ua tau zoo hauv tib chav kawm xws li Dacromet. Qhov kev xaiv zaum kawg feem ntau nyob ntawm qhov tshwj xeeb OEM specifications, muaj kev xaiv topcoat, thiab cov khoom siv hauv cheeb tsam. Zuag qhia tag nrho, Dacromet muaj qhov zoo sib npaug ntawm nyias zaj duab xis tuab, siab corrosion kuj, thermal stability, thiab kev ywj pheej los ntawm hydrogen embrittlement.

8. Cov lus xaus

Dacromet tiaj tus ntxhua khaub ncaws sib xyaw ua ke cov txiaj ntsig zoo ntawm cov pa ntxhua khaub ncaws-load faib thiab kev tiv thaiv saum npoo-nrog cov zinc-txheej txhuas flake txheej uas ua rau muaj kev tiv thaiv corrosion zoo heev, kev ua haujlwm kub, thiab kev nyab xeeb rau kev siv zog siab. Lawv nyias, nyias zaj duab xis, pov thawj automotive pedigree, thiab ntev kev pab cuam lub neej ua rau lawv ib tug nyiam xaiv nyob rau hauv lub tsheb, kev tsim kho, marine, thiab dav kev lag luam sectors.

Thaum qhia txog cov tshuab ntxhua khaub ncaws no, yuav tsum tau saib xyuas cov qib hardness uas yuav tsum tau muaj, qhov ntsuas qhov ntev (DIN, ISO, lossis ANSI), txheej hnyav lossis qib, thiab txhua qhov xav tau rau lubricated topcoats. Kev koom tes nrog cov tuam txhab lag luam uas tuaj yeem muab cov ntaub ntawv ntsuas tshuaj ntsev thiab cov ntaub ntawv pov thawj pab kom ntseeg tau tias kev ua tau zoo hauv kev pabcuam. Hauv cov ntawv thov uas corrosion, cua sov, lossis lub zog siab yog qhov tseem ceeb, Dacromet-coated tiaj tus ntxhua khaub ncaws tseem yog qhov pov thawj thiab siv tau zoo.

— Xaus ntawm Tshooj —