Mohammad Khanbeiki - Hi-tech department, Iran University of Industry & Mine, Tehran, P.O. Box: ۱۴۳۹۷۶۳۱۶۳, Iran
Mahdi Divandari - School of Metallurgical and Materials Engineering, Iran University of Science & Technology, Tehran, P.O. Box: ۱۶۸۴۶۱۳۱۱۴, Iran
Morteza Tamizifar - Hi-tech department, Iran University of Industry & Mine, Tehran, P.O. Box: ۱۴۳۹۷۶۳۱۶۳, Iran
Masoud Hassankhani - Hi-tech department, Iran University of Industry & Mine, Tehran, P.O. Box: ۱۴۳۹۷۶۳۱۶۳, Iran

Fading of grain refiner particles and its role in refinement level in a Twin Roll Casting (TRC) production line has been investigated. An industrial grain refiner of Al-Ti-B was applied to the aluminum melt, at different addition rates. Then, samples from different points of line were taken. Two samples just before and after the filter were taken to evaluate effect of filter on refinement. Effect of agitation in line also investigated. The grain structures obtained, show coarsening grain structure by increasing sampling point distance from addition point (before degassing unit). Increasing addition rate leads to finer grain structure. Stirring has considerable influence on grains becoming finer and filter has inverse effect on refinement.

Grain refiner, Twin roll casting, Grain structure