Iindaba

Isizathu sokuba sikhethe i-aluminium yokuhlobisa kukuba isakhiwo sayo sizinzile, kwaye sinokuchasana nokugqwala ekusebenziseni ixesha elide. Nangona kunjalo, ezinye iiprofayili ze-aluminium ziya kuba ne-corrosion phezu komhlaba, eyona nto ibangelwa ukuhlanganiswa kwezinto ezingalunganga ngexesha lokuvelisa.

1. Kwinkqubo yokuphosa, umlinganiselo we-magnesium kunye ne-silicon ayifanelekanga, njengobukho be-silicon ye-surplus, ene-silicon encinci kwi-free state, iya kwenza i-ternary compounds kwi-aluminium alloy ngexesha elifanayo. . Ezi zigaba zokungahlambuluki ezinganyibilikiyo okanye izigaba zokungahlambuluki zamahhala ezenziwe kwi-alloy zivame ukuqokelela kumda wengqolowa, kwaye zenze buthathaka amandla kunye nokuqina komda wengqolowa ngaxeshanye, zibe likhonkco elibuthathaka lokuxhathisa ukubola, kwaye ukubola kuqala kuqala ukusuka apho.

2. Kwinkqubo ye-smelting, nangona umlinganiselo we-magnesium kunye ne-silicon ungaphakathi komgangatho, kodwa ngamanye amaxesha ngenxa yokuxuba okungafaniyo kunye nokungonelanga, okubangelwa ukusabalalisa okungafaniyo kwe-silicon kwi-melt, kukho iindawo ezicebileyo kunye neendawo ezihlwempuzekileyo. Inani elincinci le-silicon yamahhala kwi-matrix ye-aluminium ayiyi kunciphisa kuphela ukuxhathisa kwe-corrosion ye-alloy, kodwa kunye nobukhulu beenkozo ze-alloy.

3. Ukulawulwa kweeparamitha ezahlukeneyo zetekhnoloji ngexesha le-extrusion, ezifana ne-bar preheating temperatures iphezulu kakhulu, i-metal extrusion flow rate, amandla okupholisa umoya ngexesha le-extrusion, iqondo lokushisa lokuguga kunye nokubamba ixesha kunye nolunye ulawulo olungafanelekanga kulula ukuvelisa ukuhlukana kwe-silicon kunye ne-silicon. Ukwahlukana, ukuze i-magnesium kunye ne-silicon ingabi yi-Mg2Si ngokupheleleyo, enye i-silicon yamahhala ikhona.
Ngamafutshane, ukuba umphezulu weprofayili ye-aluminium kulula ukuyisebenzisa, kungenxa yokuba umgangatho womgangatho weprofayili ye-aluminium uphantsi kakhulu kwimveliso, ngoko ke kufuneka sifumane umenzi oqeqeshiweyo xa ukhetha iprofayili ye-aluminium, ngoko ke iprofayili ye-aluminiyam. ukukhetha kuya kukhuseleka ngakumbi.