|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Shape Casting: 6th International Symposium
||Effects of Casting Conditions on End Product Defects in Direct Chill Casted Hot Rolling Ingots
||Arda Yorulmaz, Caglar Yuksel, Eray Erzi, Derya Dispinar
|On-Site Speaker (Planned)
Direct chill casting is a reliable casting process for almost any wrought aluminum alloy for subsequent deformation via hot rolling to supply industries such as aerospace, automotive, construction, packaging and maritime. While some defects occur during casting, like hot tearing, some others like surface defect causing blisters, appear after hot rolling process or annealing after final cold rolling steps. It was found tha some of these defects are caused by melt impurities formed from entrained folded aluminum oxides or bifilms. A study in a hot rolling casting facility was carried out with different melt cleaning practices, launder and molten metal transferring designs. Bifilm index was used for determining melt cleanliness measurement. It was found that porous plug gas diffusors are more effective than lance type degassers and a design towards less turbulent molten metal flow from furnace to mould cavity are necessary for reducing defects caused by bifilms.
||Planned: A print-only volume