How to distinguish between hot rolling and cold rolling of silicon steel sheet?

How to distinguish between hot rolling and cold rolling of silicon steel sheet

The main differences are as follows: (1) The magnetic saturation point of cold-rolled silicon steel sheet is high, and the magnetic flux density begins to saturate at 1.9T (19000Gs); The saturation point of hot-rolled silicon steel sheet is about 1.6 T(16000Gs).
(2) In the case of the same magnetic flux density and frequency, the unit loss of cold-rolled silicon steel sheet is lower than that of hot-rolled silicon steel sheet.
(3) There are two kinds of cold-rolled silicon steel sheets with and without orientation. The orientation cold rolled silicon steel sheet has obvious directivity, that is, the magnetic properties along the rolling direction are good, the saturation flux density is high, and the unit loss and unit excitation capacity are small. At present, cold-rolled oriented silicon steel sheets are used on transformers. Hot-rolled silicon steel sheet is not oriented.

(4) When the silicon steel sheet is processed by cutting or stamping, the effect on the performance of the cold-rolled silicon steel sheet is particularly obvious, and the effect on the hot-rolled silicon steel sheet is small, so when the cold-rolled silicon steel sheet is used in the small-capacity transformer, annealing measures can be taken, and the no-load loss can generally be reduced by about 8% after annealing.