Preparation of Al-Ti-N Master Alloy Grain Refiner for Al

Abstract

An Al-Ti-N master alloy was prepared through the addition of AlN and Ti powders into pure Al melt heated in an induction furnace. This master alloy shows a higher grain refinement effect for pure Al than Al-Ti due to the formation of TiN and/or AlxTiyNz particles in the Al matrix. DTA, SEM and XRD results suggest that TiN and/or AlxTiyNz particles start to form at about 970°C during heating the Al-Ti-AlN powder mixture.

The Modification Research of Al-Ti-B Master Alloy (Progress)

“…In the aluminum industry, fine grain strengthening can improve the formability, enhance the strength, toughness and the as-cast microstructure of the product. The Al-Ti-B master alloy was widely used in the aluminum industry shared about 75% of the world's grain refiner's usage [1]. Since the aggregation and settlement of TiB 2 particles, the refinement effect because of the existence of Zr and Mn greatly reduced-poisoning effect, then appear a series substitution for Al-Ti-B master alloy such as Al-Ti-C, Al-Ti-B-Re [2].…”