A united refinement technology for commercial pure Al by Al–10Ti and Al–Ti–C master alloys

Because flake-like TiAl 3 particles in Al–Ti–C master alloys prepared in a melt reaction method dissolve slowly when they are added into Al melt at 720 °C, Ti atoms cannot be released rapidly to play the assistant role of grain refinement, leading to a poor refinement efficiency of Al–Ti–C master alloys. A united refinement technology by Al–10Ti and Al–Ti–C master alloys was put forward in this paper. The rational combination of fine blocky TiAl 3 particles in Al–10Ti and TiC particles in Al–Ti–C can improve the nucleation rate of α-Al. It not only improves the grain refinement efficiency of Al–Ti–C master alloys, but also reduces the consumption.