Effect of Al-5Ti-1B on Structures and Properties of Casting 702A Aluminum Alloy

The grain size of the aluminum alloy has a significant influence on the mechanical properties of the alloy.In this paper,the Al-5Ti-1B alloy refiner with stability performance was used to refine 702A aluminum alloy,and the effects of different contents of refiner on casting 702A aluminum alloy microstructure and mechanical properties was studied.The results show that with 0.15% Al-5Ti-1B,α dendrite and eutectic Si phase was refined simultaneously;as the refining agent content increases,the tensile strength increased and the comprehensive mechanical properties were improved.