关键词: 6.5 %Si钢, 双辊薄带连铸, 温轧温度, 织构, 磁感 

Abstract: High silicon steel has excellent soft magnetic properties and is an ideal material for  iron cores of medium and high frequency electric motors. 6.5 %Si steel sheet with a thickness of 0.30 mm was prepared by double roll continuous casting-hot rolling-warm rolling-annealing process. The effects of different warm rolling processes on the texture and final magnetic properties of 6.5 %Si sheet rolling and annealing were studied by X-ray diffractometer and magnetic measurement. The results showed that the lower the warm rolling temperature is, the more favorable the formation of {001}〈0vw〉 texture is in the core of the sheet. The samples rolled at 600 ℃ and 500 ℃ contain mainly γ texture after annealing, while the samples rolled at 400 ℃ contain both γ texture and η texture with higher strength after annealing, and the corresponding magnetic induction value is high. At the same annealing temperature, {001}〈0vw〉 texture does not form in the two step rolling process, and η texture does not form in the sample after annealing, and the magnetic induction of the sample is lower than that of the one step rolled sample. Therefore, low temperature rolling is conducive to forming favorable η texture and improving magnetic induction of samples during annealing.

Key words: 6.5 %Si steel, double roll thin strip continuous casting, warm rolling temperature, texture, magnetic induction