In the microstructure of AlTi master alloy can be distinguished two different types of particles: TiB2 particles (usually of 1-2 microns) that do not dissolve in liquid aluminium and TiAl3 particles (bigger than Tib2, usually of 30-50 microns) that can be easily dissolved in liquid aluminium. Both types of particles play an essential role in the refining of the grain.
Decades of research on the applications of aluminium grain refiners show that AlTiB alloy is the most widely used in foundries around the world.
In order to complement its offer, in 2018 Alumetal joined the group of grain refiner manufacturers – AlTiB master alloy. The quality of the offered product fulfil the highest standards.
The main application of AlTiB master alloy is refining of metal grains by enhancing the formation of a large number of crystallization nuclei and increasing the homogeneity of Al alloys and products. It results in:
- better mechanical properties and machinability
- increased resistance to fatigue
- enhanced casting production process, lower risk of shrinkage and porosity
- better heat treatment, reduction of hot cracking (AlCu, AlMg alloys)
The grain refiner is produced in the following forms:
- coiled rod from 180 kg to 450 kg and diameter of 9.5 mm +/- 1%
- cut rod, rod 500-1000 mm long
- semi-continuous casting (conti bars) of 0,5-3 kg and dimensions: 185 - 1110 mm ± 1% long, cross-section area about 1000 mm2
