Cr-contained non-oriented electrical steel and production method thereof

Abstract

The invention relates to Cr-contained non-oriented electrical steel and a production method thereof, solving the problems that the better the magnetic performance, and the lower the yield ratio; and the poorer the process performance of a punching sheet, the more serious the edge magnetic deteriorating effect and the like existing in the inherent magnetic performance and process performance. The Cr-contained non-oriented electrical steel comprises the following chemical components in percentage by weight: 0.001-0.015 percent of C, 0.2-0.8 percent of Mn, 0.1-0.8 percent of Cr, 0.1-1.4 percent of Al, 0.1-0.9 percent of Si, not more than 0.08 percent of P, not more than 0.015 percent of S, not more than 0.008 percent of N and the balance of Fe and inevitable impurities, meanwhile, the requirement that the summation of Si and Al is 0.2-2.0 percent is met. The production method comprises the following steps of: smelting the clean steel by the process and continuously casting into billets; heating the billets; roughly rolling; finish rolling: controlling the accumulated rolling reduction rate of front four paths to 80-95 percent; coiling; naturally cooling to room temperature; acid washing, cold rolling, decarburizing, evenly heating; and cooling, coating and finishing according to the conventional process. The invention has the advantages of excellent inherent magnetic performance,high yield ratio and excellent process performance of punching sheet.

Description

technical field [0001] The invention relates to a non-oriented electrical steel and a production method thereof, in particular to Cr-containing non-oriented electrical steel and a production method thereof. Its steel electrical steel soft magnetic material manufacturing field is mainly for the manufacture of various types of motor cores, EI transformer cores and various power supply core materials in the electric power and electronics industries. Background technique [0002] With the development of industrial automation technology, the manufacture of iron cores for various power electronic devices requires not only excellent intrinsic performance, but also high-speed and automatic punching and stacking, which requires non-oriented silicon steel core materials to have excellent magnetic properties. And good punching process performance. The performance of the punching process is directly related to the yield ratio of the material. The higher the yield ratio, the smaller the...

AI Technical Summary

Problems solved by technology

In the finished product annealing process, there is no focus on the grasp of the development timing of the static recrystallization process and the recrystallization grain growth process and the control of favorable texture components

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