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Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing

A technology of high magnetic induction orientation and silicon steel belt, which is applied in the field of high magnetic induction orientation silicon steel, can solve the problems of high cost and unfavorable energy saving, and achieve the effect of improving phase strength, improving product quality level, and increasing product magnetic induction value

Inactive Publication Date: 2014-02-26
武汉钢铁有限公司
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Problems solved by technology

[0011] EP0950119B1 adopts a two-stage normalization method in which the steel strip is heated to 1000-1150°C and then water-cooled at 800-950°C. In this method, the heating temperature of the steel billet for hot rolling reaches 1270-1310°C, which is not conducive to energy saving and high cost

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  • Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing
  • Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing
  • Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing

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Embodiment Construction

[0028] The present invention is described in detail below:

[0029] Test conditions: the test of each embodiment of the present invention adopts the casting slab composition of the existing steel type, and the values ​​of each embodiment are in the composition and weight percentage: 2.5~3.5% Si; 0.030~0.090%C; 0.015~0.040 % AIsol; ≤0.010%N; 0.020~0.10%Cu; 0.020~0.150%Sn, 0.030~0.15%Mn, ≤0.035%S, the total amount of Cr, Ni, Mo does not exceed 0.25%, the rest is Fe and unavoidable Arbitrarily selected within the range of impurities. The thickness of the slab does not exceed 250mm.

[0030] Table 1 is the main process parameter list of each embodiment of the present invention and comparative example;

[0031] Table 2 is a list of performance testing situations of each embodiment of the present invention and comparative examples.

[0032] Each embodiment of the present invention is produced according to the following steps:

[0033] Its steps:

[0034] 1) After smelting and s...

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Abstract

A method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing comprises the following steps: heating a casting blank to 1100-1250DEG C; carrying out hot rolling of the casting blank to the thickness of the casting blank 5-14.3 times higher than the thickness of a finished silicon strip; reeling; carrying out three-stage normalizing annealing; once carrying out cold rolling in a 130-250DEG C ageing rolling manner to the thickness of the finished silicon strip; carrying out decarburizing annealing in a wet N2+H2 atmosphere; carrying out nitriding annealing; and carrying out high temperature annealing. The method which adopts a three-stage normalizing technology improves the phase strength of Gauss crystal grains in hot rolled plates, so the magnetic induction values of the oriented silicon strips are improved, and the quality level of the oriented silicon strips is improved. The third-stage temperature is low, so the temperature uniformity and the cooling stress of steel plates before quenching the hot rolled plates are well controlled, the cold rolling brittleness after the normalizing annealing of the hot rolled plates is improved, the cold rolling can be completed without water-bath heating, and the production efficiency is increased.

Description

technical field [0001] The invention relates to a production method of high magnetic induction oriented silicon steel using a cold rolling method including normalizing annealing of hot-rolled sheets, especially refers to the ability to improve the Goss texture strength of low-temperature high magnetic induction oriented silicon steel hot-rolled sheets in the process of normalizing annealing , so as to improve a production method of magnetic induction value. The method provides a billet heating temperature lower than 1250 DEG C, which is controlled by a three-stage normalizing annealing process, thereby controlling the magnetic induction intensity value and cold rolling processing performance of the final product. It can stably produce high magnetic induction oriented silicon steel sheets on an industrial scale, with good productivity and high magnetic induction value of finished products. Background technique [0002] The transformer core is generally composed of oriented s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12C23F17/00
Inventor 毛炯辉王若平许光郭小龙张文辉傅连春曹阳骆忠汉林勇钟光明朱业超
Owner 武汉钢铁有限公司
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