Yuav ua li cas yog kev kho kom zoo li qub ntawm aloyoy kub - dip galvanized ntawv (GA) tiav?

Yuav ua li cas yog "kev pab cuam aloying" ntawm aloyed kub - dip galvanized ntawv (GA) tiav?
GA ntxiv "alloying rauv" kauj ruam tom qab GI galvanizing. Tshwj xeeb:
Qhov kub - dip galvanized ntawv (nrog lub tshuab cua ntshiab zoo nkauj, qhov twg yog qhov ntsuas kub
Qhov ntsuas kub yog tswj tau rau 10 {{{- 30 vib nas this, ua ib qho zn-fe txheej ntawm zn₁₃fe thiab znfe₂).
Lub zinc txheej tau txias sai sai (txhawm rau tiv thaiv cov txheej alloy los ntawm kev ua tuab thiab hloov pauv mus rau ib qho kev sib tw, ua rau tsis muaj zinc ntshiab.
Kev tswj tseem ceeb ntawm cov ntsiab lus: kev kub heev ua rau cov tuab tuab tuab alloy txheej (brittleness); Tsawg dhau qhov kub tsawg ua rau tsis tiav kev ua tiav (ib qho zoo zinc txheej tseem nyob).
Yuav ua li cas ceev faj thaum txiav galvanized ntawv? Yuav tsum zam cov teeb meem twg?
Thaum txiav (shearing lossis sawing), them sai sai rau peb lub ntsiab lus kom tsis txhob muaj teeb meem zoo:
Cov kev xaiv cuab tam: Siv siab - Cov cuab yeej ceev steel lossis carbide cov cuab yeej los tiv thaiv cov txheej zinc los ntawm kev ua "ripped" vim yog cov cuab yeej blunt "vim yog cov cuab yeej blunt.
Kev Hloov Kho: Qhov sib txawv ntawm lub sab saud thiab qis dua ntawm cov shear yuav tsum phim cov ntawv tuab (feem ntau yog 5% -10% ntawm cov ntawv tuab). Ntau qhov sib txawv tuaj yeem ua rau muaj kev cuam tshuam yooj yim rau cov npoo, thaum lub sij hawm me me dhau lawm tuaj yeem puas cov txheej zinc.
Kev tiv thaiv xeb: Tom qab txiav, cov npoo, yuav tsis tiv thaiv los ntawm zinc txheej, yuav tsum tau tam sim ntawd coated nrog anti {}} Cov xim pleev xim kom tsis txhob xeb ("txiav corrosion").
Yuav yog galvanized ntawv yuav khoov? Dab tsi yog cov yuam sij tseem ceeb rau khoov? Dabtsi yog khoov yog ua tau, tab sis ob lub ntsiab lus tseem ceeb yuav tsum tau tswj los tiv thaiv zinc fluminaking:
Dab tsi yog khoov radius (r): qhov no hais txog sab hauv Arc vojvoog ntawm khoov. Nws yuav tsum yog 1-2 zaug daim ntawv tuab (piv txwv li, rau 2 hli tuab galvanized daim ntawv, kev khoov hluav ncab yuav tsum yog 2mm lossis ntau dua). Lub vojvoog me me tuaj yeem ua rau cov txheej zinc kom ncab kom ncab thiab tawg.
Dabtsi yog khoov kev taw qhia: khoov hauv cov kev taw qhia ntawm daim ntawv dov yuav ua rau muaj ntau dua elongation thiab tsawg tawg ntawm zinc txheej. Dabtsi yog khoov tawm tsam cov kev taw qhia yob yuav tsum muaj lub vojvoog loj.
NCO TSEG: Ga zinc co coings muaj qis dua qis dua, yog li kev xaws hluav taws xob yuav tsum yog 10%-20% loj dua GI.
Yuav cov ntawv galvanized tau pleev xim lossis coated? Dab tsi ua ntej - kev kho mob yog qhov yuav tsum tau? Nws tuaj yeem pleev xim (piv txwv li, khoom siv hauv tsev) lossis coated (piv txwv li, archecture zoo nkauj Panels). Pretreatment yog qhov tseem ceeb (los xyuas kom ntseeg tau adhesion):
Degreasing: Siv cov kuab tshuaj lossis alkaline huv los tshem tawm cov roj deg (xeb {{}}} Cov roj pov thawj thaum lub sij hawm tsim khoom);
Rust tshem tawm: Yog tias muaj me ntsis oxidized me ntsis rau saum npoo, tshem lawv nrog cov khau khiab zoo lossis tshuaj phosphote kev kho mob;
Passivation: yog tias cov thawj txheej passivation yog puas, rov ua dua cov kev daws teeb meem (los txhim kho txheej txheej adhesion);
Kom qhuav: kom cov nplaim yog dawb noo thiab impurities ua ntej tha xim lossis txheej.
Lub hauv paus ntsiab lus: Pretreatment tshem tawm cov paug los saum npoo av, tsim kom muaj qhov chaw "uas tso cai rau cov txheej toinc thiab tiv thaiv kom nruj.
Dab tsi yog lub hom phiaj ntawm kev ntxiv "txhuas" hauv galvanized ntawv ntau lawm? Aluminium yog feem ntau ntxiv rau kub - dip galvanizing chav dej ntawm ib qho siab ntawm 0.15% -0.25%. Nws ua haujlwm ob lub luag haujlwm tseem ceeb:
Tiv thaiv cov hlau ntau dhau - cov txheej txheem ntawm cov txheej txheem ntawm cov dej khov, yog li kev tiv thaiv cov txheej txheem ntawm cov dej khov,
Txhim kho qhov ci ci thiab kev sib tw ntawm zinc txheej: aluminium ua kom haum zinc muaju, ua rau muaj cov khaub noom zinc ntau ntxiv thiab cov khoom sib txawv.
Note: Excessive aluminum content (>0.3%) tuaj yeem txo cov fluacity ntawm cov da dej zinc thiab nce kev pheej hmoo ntawm cov av xau.