Isizathu sokuthi sikhethe i-aluminium yokuhlobisa kungenxa yokuthi isakhiwo sayo sizinzile, futhi inokumelana nokugqwala ekusetshenzisweni kwesikhathi eside. Kodwa-ke, amanye amaphrofayili e-aluminium azoba nokugqwala phezulu, okubangelwa ikakhulukazi ukuhlanganiswa kwempahla okungalungile ngesikhathi sokukhiqiza.
1. Enkambweni yokuphonsa, ingxenye ye-magnesium ne-silicon ayifanele, njengokuba khona kwe-silicon engaphezulu, enenani elincane le-silicon esimweni samahhala, izokwakha ama-ternary compounds ku-aluminium alloy ngesikhathi esifanayo. Lezi zigaba zokungcola okungancibiliki noma izigaba zokungcola kwamahhala ezakhiwe kungxubevange zivame ukubuthana emngceleni wokusanhlamvu, futhi zenze buthaka amandla nokuqina komngcele wokusanhlamvu ngesikhathi esifanayo, zibe isixhumanisi esibuthakathaka sokumelana nokugqwala, futhi ukugqwala kuqala kusuka lapho.
2. Enkambweni yokuncibilika, nakuba ingxenye ye-magnesium ne-silicon ingaphakathi kwendinganiso, kodwa ngezinye izikhathi ngenxa yokuxuba okungalingani nokungenele, okuholela ekusabalaliseni okungalingani kwe-silicon ekuncibilikeni, kunezindawo ezicebile nezindawo ezimpofu. Inani elincane le-silicon yamahhala ku-matrix ye-aluminium ngeke linciphise kuphela ukumelana nokugqwala kwe-alloy, kodwa futhi lizomisa usayizi wokusanhlamvu we-alloy.
3. Ukulawulwa kwemingcele ehlukahlukene yezobuchwepheshe ngesikhathi sokukhipha, njengokushisa kokushisa kwe-bar kuphezulu kakhulu, izinga lokugeleza kwe-metal extrusion, amandla okupholisa umoya ngesikhathi sokukhipha, izinga lokushisa lokuguga nokubamba isikhathi kanye nokunye ukulawula okungalungile kulula ukukhiqiza ukuhlukaniswa kwe-silicon nokuhlukaniswa, ukuze i-magnesium ne-silicon ingabi ngokuphelele i-Mg2Si, amanye ama-silicon amahhala akhona.
Ngamafuphi, uma ubuso bephrofayili ye-aluminium kulula ukugqwala ekusebenziseni, kungenxa yokuthi izinga lekhwalithi yephrofayili ye-aluminium liphansi kakhulu ekukhiqizeni, ngakho-ke kufanele sithole umkhiqizi ochwepheshe lapho sikhetha iphrofayili ye-aluminium, ngaleyo ndlela iphrofayili ye-aluminium oyikhethayo izovikeleka kakhulu.
Isikhathi sokuthumela: May-10-2022
