Yog vim li cas vim li cas peb xaiv siv aluminium profiles rau kev kho kom zoo nkauj yog vim lawv cov qauv ruaj khov thiab lawv muaj kev tiv thaiv corrosion ntau dua thaum siv mus ntev. Txawm li cas los xij, kev xeb tuaj yeem tshwm sim ntawm qee qhov txhuas profile, feem ntau yog vim qhov tsis raug ntawm cov khoom siv tsim khoom siv thaum ua thiab tsim cov txhuas profiles.
1. Qhov sib ntxiv ntawm magnesium thiab silicon sib txawv thaum lub sij hawm casting txheej txheem, xws li muaj ib co ntau silicon, uas tsim ternary tebchaw nyob rau hauv txhuas alloys ntxiv rau ib tug me me ntawm silicon nyob rau hauv lub dawb lub xeev. Cov insoluble los yog dawb impurity theem tsim nyob rau hauv alloys feem ntau aggregate nyob rau hauv grain ciam teb, tsis muaj zog lawv lub zog thiab toughness, ua lub weakest txuas nyob rau hauv corrosion kuj, qhov twg corrosion thawj tshwm sim.
2. Thaum lub sij hawm melting txheej txheem, txawm hais tias qhov sib ntxiv ntawm magnesium thiab silicon nyob rau hauv qhov ntau teev los ntawm tus qauv, qee zaum vim tsis sib npaug thiab tsis txaus stirring, kev faib ntawm silicon nyob rau hauv lub yaj yog tsis sib npaug, nrog rau hauv cheeb tsam enriched thiab depleted cheeb tsam. Nws yog ncaj qha cuam tshuam hauv cov khoom siv aluminium profile. Thaum muaj me me ntawm cov dawb silicon nyob rau hauv aluminium matrix, nws tsis tsuas yog txo cov corrosion kuj ntawm cov hlau, tab sis kuj coarsens lub grain loj ntawm cov alloy.
3. Kev tswj tsis raug ntawm ntau yam txheej txheem tsis zoo thaum extrusion, xws li ntau dhau preheating kub ntawm billet, hlau extrusion txaus tus nqi, cua txias zog thaum extrusion, laus kub, thiab rwb thaiv tsev lub sij hawm, yuav yooj yim ua rau silicon segregation thiab dissociation, ua rau magnesium. thiab silicon tsis siab dhau los ua Mg2Si theem, thaum qee qhov dawb silicon muaj.
Nyob rau hauv luv luv, yog hais tias aluminium profiles yog feem ntau nto corrosion thaum siv, nws tseem yog vim tsis zoo cov qauv ntawm txhuas profiles thaum lub sij hawm ntau lawm. Yog li ntawd, thaum xaiv aluminium profiles, peb yuav tsum mus rau lub tuam txhab muaj koob npe los xyuas kom meej tias xws li txhuas profiles muaj kev ruaj ntseg dua
