摘要
Titanium is an excellent grain refiner for aluminium and aluminium alloys, and the addition is normal-ly made by melt inoculation with aluminium-titanium master alloys typically containing 2.5% and 5%titaniurn. The paper describes a process for the production of Al-2.5% Ti and Al-5% Ti master alloys by di-rect alloying of the metals, and presents the results obtained from the heats taken under different processconditions. Alloying efficiencies as high as 96%, computed on the basis of titanium recovery. have been ob-tained in the case of 2.5% Ti master alloy as against 900/0 for the 5% Ti master alloy, al operation temperatures of 1050℃ and 1200℃ respectively. The lower efficiency in the case of higher titanium master alloy isattributed to incomplete dissolution of titanium and the significant oxidation losses occurring at the highertemperature of operation.
Titanium is an excellent grain refiner for aluminium and aluminium alloys, and the addition is normal-ly made by melt inoculation with aluminium-titanium master alloys typically containing 2.5% and 5%titaniurn. The paper describes a process for the production of Al-2.5% Ti and Al-5% Ti master alloys by di-rect alloying of the metals, and presents the results obtained from the heats taken under different processconditions. Alloying efficiencies as high as 96%, computed on the basis of titanium recovery. have been ob-tained in the case of 2.5% Ti master alloy as against 900/0 for the 5% Ti master alloy, al operation temperatures of 1050℃ and 1200℃ respectively. The lower efficiency in the case of higher titanium master alloy isattributed to incomplete dissolution of titanium and the significant oxidation losses occurring at the highertemperature of operation.
