Patent ID: 9496078
Filing Date: 2016-11-15
CPC Classification: C21D,C22C,H01F

Claim Text:
1. A manufacturing method of a hot-rolled silicon steel comprising a heating procedure, a rough rolling procedure, and a finishing rolling procedure on a silicon steel slab, where said heating procedure is conducted in a heating furnace comprising a preheating section, a heating section and a soaking section, wherein, the preheating section satisfies the following formula (1), wherein, V t: Total heating time of the slab in the heating furnace, and t=180˜240 min, T the soaking section satisfies the following formula (2-1) or (2-2), −10° C.≦T 10° C.≦T wherein, T the temperature rise of the heating section satisfies the following formula (3): wherein said preheating section refers to a section from an entering point at which the slab enters into the furnace to a point that is 1/6˜1/3 of the furnace length away from said entering point, said soaking section refers to a section from an exit point at which the slab is taken out of the furnace to a point that is 1/6˜1/3 of the furnace length away from said exit point, and said heating section refers to a section that is between the preheating section and the soaking section.