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Production method of high magnetic induction grain-oriented silicon steel strip

A technology of high magnetic induction orientation and production method, applied in the direction of coating, furnace type, furnace, etc., can solve the problem that high magnetic induction oriented silicon steel products cannot be obtained, and achieve high quality, precise control of production process, and improved quality. Effect

Inactive Publication Date: 2010-07-14
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only obtain general grain-oriented silicon steel sheets (CGO) with low magnetic properties, and cannot obtain grain-oriented silicon steel products with high magnetic induction.

Method used

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  • Production method of high magnetic induction grain-oriented silicon steel strip
  • Production method of high magnetic induction grain-oriented silicon steel strip

Examples

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Effect test

Embodiment and comparative example 1

[0028] A production method for rolling a 210mm thick continuous casting slab into a high magnetic induction oriented silicon steel strip comprises the following steps:

[0029] 1) In the molten steel continuous casting process, cast a continuous casting slab with a thickness of 210 mm, and control its chemical composition in terms of weight percentage: C: 0.058, Si: 3.15, Al sol : 0.030, N: 0.008, Cu: 0.080, Sn: 0.053, Mn: 0.100, S: 0.010, Cr: 0.020, P: 0.010, Ti: 0.002, and the rest are Fe and inevitable inclusions.

[0030] 2) The obtained continuous casting slab is heated to 1180° C. for hot rolling, and rolled into a hot-rolled steel strip with a thickness of 2.2 mm. The coiling temperature of the hot-rolled steel strip is controlled at 550° C.

[0031] 3) Two-stage annealing and normalization processes are used to process the obtained hot-rolled steel strip. The heating temperature of the first stage annealing and normalization process is 1120 ° C, and the holding time is...

Embodiment and comparative example 2

[0042] The production method of rolling a 230mm thick continuous casting slab into a high magnetic induction oriented silicon steel strip comprises the following steps:

[0043] 1) In the molten steel continuous casting process, cast a continuous casting slab with a thickness of 230 mm, and control its chemical composition in terms of weight percentage: C: 0.060, Si: 3.19, Al sol : 0.032, N: 0.005, Cu: 0.050, Sn: 0.100, Mn: 0.070, S: 0.003, Cr: 0.100, P: 0.020, Ti: 0.002, and the rest are Fe and inevitable inclusions.

[0044] 2) The obtained continuous casting slab is heated to 1150° C. for hot rolling, and rolled into a hot-rolled steel strip with a thickness of 2.2 mm. The coiling temperature of the hot-rolled steel strip is controlled at 550° C.

[0045] 3) Two-stage annealing and normalization processes are used to process the obtained hot-rolled steel strip. The heating temperature of the first stage annealing and normalization process is 1100 ° C, and the holding time i...

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Abstract

The invention discloses a production method of a high magnetic induction grain-oriented silicon steel strip, comprising the following processes of: controlling chemical compositions in a continuous casting, heating the continuous casting to 1100-1200 DEG C and then hot rolling into a hot rolled steel strip the thickness of which is 2.0-2.5mm, carrying out two-stage normalizing annealing, single cold rolling into a cold rolled steel strip the thickness of which is 0.23-0.30mm, continuously decarbonizing, continuously nitriding, and carrying out secondary recrystallization annealing, normalizing cooling and the like, wherein in the process of continuously decarbonizing, N in the cold roller steel strip is controlled at 0.018-0.031 percent by weight; in the process of secondary recrystallization annealing, the escape amount of N in the cold rolled steel strip is controlled within the range of 3-27 percent of the total weight of the cold rolled steel strip when the temperature is 950-1050 DEG C, and finally, the high magnetic induction grain-oriented silicon steel strip is produced. The method has moderate heat treatment temperature on a plate blank, easy control on processes and high quality of obtained products, thereby meeting the needs of high magnetic induction grain-oriented silicon steel used for transformer cores.

Description

technical field [0001] The invention relates to the manufacturing technology of oriented silicon steel, in particular to a production method of high magnetic induction oriented silicon steel strip mainly used in transformer iron cores. Background technique [0002] The transformer core is mainly composed of oriented silicon steel laminations. The laminations are cut along the rolling direction of the oriented silicon steel strip and form a ring circuit. The working form of the transformer itself is that the primary coil current induces magnetic flux in the iron core, and the magnetic flux generates current in the secondary coil, thereby realizing the conversion function of electricity-magnetism-electricity. Among the magnetic parameters, the magnetic flux density is represented by B, and the unit is T; the iron loss under the condition of a given frequency and magnetic flux density is represented by P, and the unit is W / Kg. Oriented silicon steel sheets are usually divided ...

Claims

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Application Information

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IPC IPC(8): C22C38/34C21D8/02C21D9/52B21B37/16C23C8/26C21D1/68C21D1/26
Inventor 王若平毛炯辉方泽民曹阳张先贵骆忠汉黎世德刘良田钟光明鲁军曾武张文辉许光蔡延礴许慧英黄斌
Owner 武汉钢铁有限公司
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