Manufacturing method of high tension and non-oriented electrical steels and the electrical steels there of

摘要

The present invention relates to a high tensile non-oriented electrical steel sheet and a method for manufacturing the same, C: 0.004wt% or less, Si: 1.3 ~ 3.5wt%, Mn: 0.5 ~ 1.8wt%, P: 0.02 ~ 0.1wt%, Ti: 0.05 A slab reheating step of reheating a steel slab containing ˜0.2 wt%, Nb: 0.005 to 0.01 wt%, the remainder consisting of Fe and other unavoidable impurities, a step of hot rolling the reheated steel sheet, and a hot rolled steel sheet Winding up; Cold rolling the wound steel sheet; and injecting the cold rolled steel sheet into an annealing facility in which a soaking zone is maintained at 800 ° C. or lower. According to the present invention, a small amount of precipitation reinforcing elements such as Ti and Nb are added to the electrical steel sheet components, and the hot-rolled and cold-rolled annealing conditions are optimized so that the TiC and NbC precipitates are formed within a range of 0.1 µm. A high tension non-oriented electrical steel sheet for electric vehicles can be provided.