Kusungunula katundu wa malata mkuwa

Zoyipa zowononga kwambiri mumkuwandi aluminium, silicon ndi magnesium.Zomwe zili pamwambazi zikadutsa 0.005%, zotsatira za SiO2, MgO ndi Al2O3 oxide inclusions zidzasokoneza kusungunuka ndi kuchepetsa ntchito ya mbali zina za alloy.

Mukasungunula malata amkuwa, popeza nsonga yowira ya zinki ndi yocheperako ndipo imakhala yolumikizana kwambiri ndi okosijeni, kusungunulako kumayenera kusungunuka ndikuyikidwa mu ng'anjo kuti isungunuke.Chuangrui malata amkuwa amatha kuwonjezera deoxidation, zomwe zimathandiza kwambiri kupewa Kuopsa kopanga SnO2.Zinc ndi phosphorous mu sungunuka zimakhala ndi ndondomeko yowonongeka ya deoxidation, ndipo zotsatira za 2ZnO·P2O5 zimakhala zosavuta kupatukana ndi kusungunuka, ndipo ndizopindulitsa kupititsa patsogolo kusungunuka kwa madzi.

Kugwiritsa ntchito chowotcha chowuma, kapenanso kutenthetsa motowo musanasungunuke, kumatha kuchepetsa kapena kupeŵa kutulutsa mpweya ndi kusungunuka.Kuchuluka koyenera kwazitsulo zatsopano ndi zinyalala zomwe zimapangidwira zimathandiziranso kusungunuka kokhazikika.Kuchuluka kwa zinyalala zamachitidwe sikuyenera kupitilira 20% mpaka 30%.Kusungunula komwe kumakhala koipitsidwa pang'ono ndi zonyansa kumatha kupangidwa ndi okosijeni mwa kuwomba mpweya kapena powonjezera oxidant (monga copper oxide CuO).Zinyalala zomwe zaipitsidwa kwambiri ndi zinthu zina zosadetsedwa zimatha kuyengedwa ndi zosungunulira kapena mpweya wa inert, kuphatikizapo kusungunulanso, kuti ukhale wabwino.

Njira zoyenera zodyetsera ndi kusungunula, kuphatikizapo kusungunula ndi ng'anjo yachitsulo-yozungulira mphamvu yachitsulo yokhala ndi kusungunuka kwamphamvu, ndizopindulitsa kuchepetsa ndi kupewa tsankho.Kuonjezera kuchuluka kwa nickel kusungunuka kumathandizira kufulumizitsa kulimbitsa ndi kusungunuka kwa crystallization kusungunuka, ndipo kumakhala ndi zotsatira zina zochepetsera ndi kupewa tsankho.Zowonjezera zofanana, zirconium ndi lithiamu zingathenso kusankhidwa.Njira yosakanikirana yosungunulira padera yosungunula nsonga yamkuwa ya aloyi ndiyeno jekeseni wotsogolera kusungunula mumkuwa wosungunula pa 1150-1180 ° C akhoza kutengedwa.Nthawi zambiri, kusungunula mkuwa wokhala ndi phosphorous nthawi zambiri kumakutidwa ndi zinthu zokhala ndi mpweya monga makala kapena petroleum coke popanda zosungunulira.Chophimba chomwe chimagwiritsidwa ntchito posungunula malata amkuwa okhala ndi zinki chiyeneranso kukhala ndi zinthu zokhala ndi mpweya monga makala.Pakuponyera kosalekeza, ndikofunikira kuwongolera kutentha kwapang'onopang'ono pa 100-150 ° C pamwamba pa alloy liquidus.