Production method of high magnetic induction oriented silicon steel

A technology of high magnetic induction orientation and production method, which is applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., can solve problems such as difficulty in nitriding, achieve fine and uniform initial grain size, reduce FeO content, improve The effect of processability
CN101845582BActive Publication Date: 2011-09-21BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2011-09-21

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Abstract

The invention relates to a production method of high magnetic induction oriented silicon steel, comprising the steps of smelting, continuous casting, hot rolling, normalization, decarbonization and annealing, MgO coating, high-temperature annealing and insulation coating, wherein the normalization comprises the steps that: normalization is carried out on a hot rolling plate, nitridation is finished synchronously, the temperature of normalization and nitridation is 1050-1150 DEG C, the atmosphere is 5-35% NH3 (volume percentage), and the balance of gas is N2; after the normalization and nitridation, the N content nitrided into the hot rolling plate is 60-250ppm; and normalization cooling is carried out, the initial temperature of fast cooling is 700-950 DEG C, and the fast cooling speed with the temperature of being reduced to 550 DEG C is 15-40 DEG C / s. The production method solves the problem of difficult nitridation in the decarbonization procedure when a low-temperature plate blank heating technology is used for producing the high magnetic induction oriented silicon steel, carries out synchronous nitridation on the hot rolling plate in the normalization procedure, and leads the following procedure of decarbonization and annealing techniques to be simplified and easily controlled, thus not only being capable of obtaining a high magnetic induction oriented silicon steel product with excellent performance and simultaneously leading the production cost to be reduced.
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Description

technical field

[0001] The invention relates to a production method of high magnetic induction oriented silicon steel products, a low-cost production method of high magnetic induction oriented silicon steel, which is characterized in that the hot-rolled coils obtained by low-temperature slab heating (1100-1250 °C) technology are processed by Simultaneous nitriding is carried out in the normalization process, so that the decarburization annealing process in the subsequent process can be simplified and easy to control. While obtaining high magnetic induction oriented silicon steel products with excellent magnetic properties, the production cost is also greatly reduced. Background technique

[0002] The production method of traditional high magnetic induction grain-oriented silicon steel is as follows:

[0003] Use a converter (or electric furnace) to make steel, carry out secondary refining and alloying, and continuously cast into a slab. Its basic chemical composition is Si ...

Claims

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