Hot rolling method of cold-rolling low-carbon non-oriented electrical steel

冷轧低碳低硅无取向电工钢的热轧方法

Abstract

本发明涉及一种冷轧无取向电工钢的制造方法,尤其是涉及一种冷轧低碳低硅无取向电工钢的热轧方法,包括精轧及精轧之后的卷取,板坯在精轧阶段经过至少两个道次的轧制,所述板坯的奥氏体、铁素体两相区温度范围的上限低于945℃,下限高于925℃;所述板坯在精轧阶段的其中两个相邻道次之间经过强制冷却,板坯在前一道次的轧制温度高于945℃,在后一道次的轧制温度低于925℃。本发明的热轧方法使得普通精轧机组能够适用于冷轧低碳低硅无取向电工钢生产,简化了控制方法、降低了生产成本,有利于冷轧低碳低硅无取向电工钢的生产、推广。
The invention relates to a manufacture method of cold-rolling non-oriented electrical steel, in particular to a hot rolling method of cold-rolling low-carbon non-oriented electrical steel, comprisinga finishing step and a coiling step after the finishing step. At least two passes of rolling are carried out on a plate blank in the finishing step; two phase regions of the austenite and the ferriteof a plate blank have a temperature range with an upper limit lower than 945 DEG C and a lower limit higher than 925 DEG C; and the plate blank is forcefully cooled between two adjacent passes in thefinishing step and has a rolling temperature higher than 945 DEG C in the prior pass and a rolling temperature lower than 925 DEG C in the later pass. The hot rolling method enables a common finishingmill group to be suitable for the production of the cold-rolling low-carbon non-oriented electrical steel, simplifies the control method, decreases the production cost and is beneficial to the production and the popularization of the cold-rolling low-carbon non-oriented electrical steel.

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