Selection of cold-rolled billet thickness of electrical steel plate and its total pressure down rate

The market demand for electrical steel width is mainly 1200 mm and 1000mm, Tonggang cold rolling plate company cold rolling mill is a 1710 mm rolling mill, can roll wide gauge plate, so choose to develop 1200mm wide gauge steel plate. The main magnetic performance requirements of non-oriented silicon steel are low iron loss and high magnetic inductance. Iron loss and magnetic induction belong to tissue sensitive magnetism, and in addition to chemical composition, they are also related to internal tissue structure, steel plate thickness, surface finish, applied stress, etc. The use of one-shot cold rolling method can increase output and reduce costs. The use of the primary cold rolling method requires a large pressure rate (≥75%) to ensure that the {110}<001 > texture components are further increased and the magnetic properties are improved. According to the requirements of the overall compression rate of electrical steel, the thickness of the hot-rolled raw material is 2.3 mm, and the total compression rate of cold-rolled is 78%. This not only ensures the depression rate requirement (>75%), but also facilitates the control of the shape of the hot-rolled plate [3].