Semi-processed non-oriented electrical steel production method through endless rolling

Abstract

The invention relates to a semi-processed non-oriented electrical steel production method through endless rolling. The method comprises the production steps that (1) smelting is conducted; (2) continuous casting and hot rolling are conducted, wherein the pouring drawing rate is 4.0-7.0 m / min, the thickness of a casting blank is 91-110 mm, the induction heating temperature is 950-1150 DEG C, heat preservation lasts for 30-60 s, the finish rolling temperature is 850-950 DEG C, and the winding temperature is higher than or equal to 750 DEG C; (3) pickling and critical reduction are conducted; and(4) decarburization stress relief annealing and bluing treatment are conducted. According to the method, in the endless rolling process, at the high drawing speed, the casting blank is directly rolled into a sheet without being heated by a soaking pit furnace, through high-temperature winding, critical reduction, stress relief annealing and bluing treatment, primary cold cooling and intermediateannealing are omitted, no coasting layer is needed, and environmental pollution is avoided; and the method has the advantages of being short in procedure, environmentally friendly, low in carbon and efficient.

Description

technical field [0001] The invention belongs to the technical field of iron and steel, and relates to a method for producing semi-process non-oriented electrical steel by endless rolling. Background technique [0002] Non-oriented electrical steel is the key material for making various types of motor cores. In order to improve the performance of electrical steel and reduce production costs, people continue to optimize and improve the production method of electrical steel. [0003] Patent CN101306434A discloses a low-carbon, low-silicon, aluminum-free semi-process method for producing non-oriented electrical steel. The patent requires hot-rolled raw material components to meet C≤0.005%, Si0.1-1.0%, Mn≤0.35%, P≤0.08 %, S ≤ 0.01%, N ≤ 0.008%, O ≤ 0.015%, does not contain Al (testing requirements Al ≤ 0.005%), and the rest is Fe and unavoidable impurities. First cold rolling, intermediate annealing, second critical deformation cold rolling, and stress relief annealing to obtai...

AI Technical Summary

Problems solved by technology

This patent uses conventional smelting, continuous casting, and hot rolling processes to produce hot-rolled plates, and performs high-temperature normalization and cold-rolling with temperature. The process is long and inefficient. The additional normalization and cold-rolling heating processes are costly.

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