Production method of non-oriented electrical steel hot rolled plate

Abstract

The invention relates to the field of steel making, in particular to a production method of a non-oriented electrical steel hot rolled plate. According to the production method of the non-oriented electrical steel hot rolled plate, molten steel is cast into a plate blank first, the plate blank is heated in a heating furnace, and then the heated plate blank is subject to roughing to obtain an intermediate blank, and the intermediate blank is subject to finishing rolling to obtain the hot rolled plate, wherein the thickness of the plate blank is 160-240mm, the plate blank is heated to 1120-1250DEG C in the heating furnace, the temperature of the plate blank in the roughing process is 1080-1230 DEG C, and the thickness of the intermediate blank is 36-40mm. By means of the production method of the non-oriented electrical steel hot rolled plate, the production of the non-oriented electrical steel hot rolled plate can be realized by adopting a common steel hot rolled plate production line,a special electrical steel hot rolled plate production line can be omitted, the production cost of the non-oriented electrical steel hot rolled plate is obviously reduced, and the production method has great popularization and application prospects.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a production method of a non-oriented electrical steel hot-rolled plate. Background technique [0002] Non-oriented electrical steel includes two categories: low-carbon and low-silicon non-oriented electrical steel with a silicon content of less than 0.5% and non-oriented electrical steel with a silicon content of 0.5%-6.5%. Core components. At present, the hot-rolled sheet production of non-oriented electrical steel is usually produced by a special hot-rolled sheet production line for electrical steel, but the cost of building a special hot-rolled sheet production line for non-oriented electrical steel is high, and the production cost is also high. Therefore, a domestic Some factories choose to produce non-oriented electrical steel hot-rolled sheets through the production lines of ordinary steel such as low-carbon aluminum-killed steel and high-strength structural steel, which can sig...

AI Technical Summary

Problems solved by technology

At present, the hot-rolled sheet production of non-oriented electrical steel is usually produced by a special hot-rolled sheet production line for electrical steel, but the cost of building a special hot-rolled sheet production line for non-oriented electrical steel is high, and the production cost is also high. Therefore, a domestic Some factories choose to produce non-oriented electrical steel hot-rolled sheets through the production lines of ordinary steel such as low-carbon aluminum-killed steel and high-strength structural steel, which can significantly reduce the production cost of non-oriented electrical steel hot-rolled sheets. When the non-oriented electrical steel sheet is hot-rolled, it is found that there will be a large number of different degrees of slab collapse after being heated in the heating furnace or when the hot-rolled sheet is tapped. The slab collapse refers to the head of the slab. The part is down, the tail of the slab is down, or the head, middle and tail of the slab are down, showing an "S" shape or a snake shape, especially the non-oriented electrical steel with a silicon content of 0.8-2.0%. The collapse of the slab and slab seriously affects the shape, thickness accuracy and performance of the non-oriented electrical steel hot-rolled sheet, and also causes difficulty in tapping and reduces production efficiency