Development of λ-fiber recrystallization texture and magnetic property in Fe-6.5 wt% Si thin sheet produced by strip casting and warm rolling method

摘要

An 6.5 wt%Si-0.3 wt%Al non-oriented electrical steel as-cast sheet with strong columnar grains was produced by twin-roll strip casting process, and subsequently treated with hot rolling, warm rolling and annealing. It was shown that the warm rolled sheet was characterized by strong α-fiber ( ＜ 110 ＞ ‖RD), quite weak γ-fiber ( ＜ 111 ＞ ‖ND) texture and inhomogeneous deformed microstruc-ture. After annealing, desirable λ-fiber ( ＜001 ＞ ‖ND) mainly including {001} ＜ 140 ＞ ～{001}＜010＞ components dominated the recrystallization texture while the y-fiber had all but disappeared, thus the annealed sheet showed a very high magnetic induction. It was indicated that the development of λ-fiber recrystallization texture could be attributed to the preferred nucleation and grain growth under the applied processes. The present study provides a new efficient way to optimize the recrystallization texture and improve the magnetic induction of high-silicon non-oriented electrical steel sheet.