科研之友
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摘要
Recrystallization inhomogeneity is a typical problem in twin-roll cast Al-Mn alloys. A compound field is applied during twin-roll casting of 3003 aluminum sheet to investigate its effects on the final recrystallization structure of the cold rolled and annealed sheet. Dendrite arms in the as-cast sheet are refined and become uniform after applying the field. The arm size range decreases from 5 to 15 mu m to 5-8 mu m. Two-step homogenization results in more nucleation particles and finer recrystallization structure than single-step routine does in both sheets. More nucleation particles are formed and evenly distributed in the field sheet under the same homogenization routine as a result of more uniformly distributed elements and grain size in the as-cast sheet. The recrystallization inhomogeneity is abated and eliminated by the compound field. Recrystallization grain size in the field sheet after 600 degrees Cx15h + 500 degrees Cx15h annealing is reduced to 30 urn x 60 urn and distributes evenly along sheet thickness.
- 出版日期2018-1
- 单位宁夏师范学院; 东北大学
