The Refining Evaluation Of AlTiC & AlTiB Grain Refiners On Wrought Aluminum Alloys

Adding grain refiner is the most simplest and effective refining method. Three kinds of wrought aluminum alloys were fabricated by casting method. Then the alloys were refined by AlTiC and imported AlTiB master alloy refiners and its mechanical properties were researched. The effects of grain size and mechanical properties of three wrought aluminum alloys to different refining parameters such as different additions, holding time etc have been studied in this article.During the different addition experiment, grain size and mechanical properties of three kinds of alloys were analyzed and discussed by macrostructure observation and microstructure analysis. The result showed that 3003 aluminum alloy had the best effect after adding AlTiB and AlTiC grain refiner with 0.0075%Ti;6063 aluminum alloy had the best effect after adding AlTiB and AlTiC grain refiner with 0.015%Ti;8011 aluminum alloy had the best effect after adding imported AlTiB grain refiner with 0.015%Ti or adding AlTiC grain refiner with 0.02%Ti. When the grain size of the three kinds of alloys were the smallest size, however, the mechanical properties were best.During the fading experiment, 3003, 6063 and 8011 aluminum alloy which were added imported AlTiB refiner reached the best refining effect when the holding time were 20, 10 and 20 minutes. While added AlTiC refiner, it reached the best refining effect when the holding time was 20, 10 and 40 minutes. With the holding time continuing, the refining effects were bad.