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A production method of thin-gauge low-temperature high-magnetic-induction grain-oriented silicon steel strip

A technology of high magnetic induction orientation and production method, applied in the field of oriented silicon steel production, can solve the problems of easy fluctuation and poor performance stability.

Active Publication Date: 2021-01-12
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a thin-gauge low-temperature high-magnetic-induction grain-oriented silicon steel strip production method for the production of thin-gauge high-magnetic-induction grain-oriented silicon steel by the low-temperature route, which mainly solves the problem of poor performance stability and fluctuations of low-temperature thin-gauge high-magnetism grain-oriented silicon steel. At the same time, this method can also improve the magnetic properties of thin-gauge high-magnetic-inductive grain-oriented silicon steel as a whole, and improve the performance uniformity in the width direction of the plate.

Method used

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  • A production method of thin-gauge low-temperature high-magnetic-induction grain-oriented silicon steel strip
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  • A production method of thin-gauge low-temperature high-magnetic-induction grain-oriented silicon steel strip

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Embodiment 1

[0048] This embodiment provides a method for producing thin-gauge, low-temperature, high-magnetic-induction grain-oriented silicon steel strip, the steps of which include:

[0049] (1) Steelmaking and continuous casting to produce slabs, the superheat of molten steel is 20°C, and the equiaxed crystal ratio is controlled by electromagnetic stirring in the secondary cooling area to 20%; the equiaxed crystal ratio refers to the percentage of equiaxed crystals in all crystals ;

[0050] The cast slab composition is: C: 0.07%; Si: 3.01%; Mn: 0.10%; S: 0.010%; Als: 0.0230%; N: 0.0090%; Sn: 0.05%; Cu: 0.3%; the rest is Fe and unavoidable impurity elements;

[0051] (2) Heating the cast slab at a heating temperature of 1200°C, followed by rough rolling and finish rolling, the edge heater is used at the entrance of finish rolling, the final rolling temperature is 900°C, and the thickness of the hot-rolled plate is 1.5-3.5mm;

[0052] (3) Adopt two-stage normalization, dry nitrogen at...

Embodiment 2-12

[0073] Embodiments 2-12 respectively provide a thin-gauge low-temperature high-magnetic induction grain-oriented silicon steel strip production method, the steps of which are basically the same as in Embodiment 1, the difference is that the chemical components of the slab are different in Si, Als, and N content, and the hot-rolled Final rolling temperature, decarburization annealing soaking temperature, nitriding temperature. All the other processing conditions and operation are consistent with embodiment 1. The main process conditions of Example 2-12 are shown in Table 1, and the magnetic properties, edge line crystals and plate shape of the high magnetic induction grain-oriented silicon steel obtained in Example 2-12 are shown in Table 2.

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Abstract

The invention provides a method for producing a thin-gauge low-temperature high-magnetic induction oriented silicon steel strip. The method comprises the following processing steps of: heating an oriented silicon steel continuous-casting plate billet, carrying out hot rolling, normalizing, carrying out cold rolling, carrying out decarburization treatment, nitriding, conventionally applying an isolating agent, carrying out high temperature annealing, carrying out flat tensile annealing, and applying an insulating layer. The soaking temperature of the decarburization and annealing and the nitriding process are adjusted according to the raw material composition and the degree of change of the hot rolling finishing temperature, and thus, the fluctuation influence of the composition and the hotrolling temperature fluctuation on the performance is reduced; on the other hand, the method realizes the matching of the primary grain size after the decarburization and the annealing and an AlN inhibitor, the nitriding temperature is adjusted to improve the uniformity of the nitriding in the thickness direction and the thermal stability of the nitride, so that the protection of the inhibitor isrealized, and the optimization of the performance of the thin-gauge oriented silicon steel is realized; meanwhile, due to the improvement of the stability of the inhibitor, when the high temperatureannealing is carried out, the secondary recrystallization in the width and length directions of the whole roll is relatively uniform, and the performance is relatively uniform thereupon.

Description

technical field [0001] The invention belongs to the technical field of oriented silicon steel production, and in particular relates to a production method of a thin-gauge, low-temperature, high-magnetic-inductive oriented silicon steel strip. Background technique [0002] High magnetic induction grain-oriented silicon steel is an important electrical soft magnetic material, mainly used in the manufacture of large-scale power transformers and high-efficiency energy-saving transformers. The strong support for energy saving and safe operation in the national power transmission and transformation field of oriented strip steel with excellent performance. There are two types of traditional high magnetic induction grain oriented silicon steel: high temperature process and low temperature process. The low temperature high magnetic induction oriented silicon steel process is one of the main processes for the production of high magnetic induction oriented silicon steel at present. It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12C22C38/04C22C38/06C22C38/20C22C38/34
CPCC21D8/1222C21D8/1244C21D8/1255C21D8/1283C22C38/001C22C38/008C22C38/04C22C38/06C22C38/20C22C38/34
Inventor 赵鹏飞黎先浩于海彬王守金游学昌王现辉赵松山庞炜光
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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