Very Thin Silicon Steel Tertiary Recrystallized by Continuous Annealing Method

It is well known that very thin grain-oriented silicon steel sheet has a very low iron loss. A continuous annealing method was used to obtain a long (over 1 m) thin grain-oriented silicon steel sheet. As a result, thin grain-oriented silicon steel sheet 40 ¿m thick and 1 m long was obtained. The annealing temperature was 1423K and the sample speed was from 0.7 to 2.1 mm/s. The annealing time needed to complete the recrystallization of (110) [001] grains was only a few minutes. However, the grain size of the sample was not uniform. As a result, the magnetic properties depend on the position of the sample.