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A kind of production method of medium frequency magnetic shielding silicon steel

A production method and magnetic shielding technology, which are applied in the field of metal materials, can solve the problems of brittleness, limited production efficiency, and high production cost of high-silicon hot-rolled hot-rolled slabs during heating, oxidation, and cold-rolling, so as to improve processing performance, reduce belt breakage, and avoid edge cracked effect

Active Publication Date: 2020-03-31
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the serious heating oxidation of high silicon steel hot-rolled slabs and the brittleness of cold rolling have not been solved and cannot be mass-produced
[0004] In 1993, Japan Steel Tube Co., Ltd. adopted the chemical vapor deposition rapid siliconization method to produce high-silicon steel, which can produce steel coils with a maximum width of 400mm. However, limited by production efficiency, it is difficult to supply in batches.
and higher production costs

Method used

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  • A kind of production method of medium frequency magnetic shielding silicon steel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The weight percent of the chemical composition of steel in Example 1 of the present invention is: C: 0.003%, Si: 6.0%, Als: 0.15%, Mn: 0.25%, P: 0.02%, S: 0.003%, N: 0.0020%, and the rest are Iron and unavoidable impurity elements. The detection results of Example 1 of the present invention are shown in Table 1.

[0024] Embodiment 1 of the present invention is a production method of intermediate frequency magnetically shielded silicon steel, including smelting-continuous casting-hot rolling-pickling-cold rolling-annealing-coating-performance inspection-packaging,

[0025] 1. The silicon content of molten steel is smelted to 3.0%, and other components are smelted to target components.

[0026] 2. Continuous casting is used to cast molten steel into billets, and the superheat of molten steel is 55°C. A feeding device 1 is arranged in the continuous casting crystallizer 5. One end of the feeding device 1 is open and the opening is downward. The inside of the feeding dev...

Embodiment 2

[0033] The weight percent of the chemical composition of steel in the embodiment of the present invention is: C: 0.003%, Si: 6.5%, Als: 0.05%, Mn: 0.30%, P: 0.01%, S: 0.003%, N: 0.0020%, and the rest is iron and unavoidable impurity elements.

[0034] The detection results of Example 2 of the present invention are shown in Table 2.

[0035] Embodiment 2 of the present invention is the production method of intermediate frequency magnetically shielded silicon steel, including smelting-continuous casting-hot rolling-pickling-cold rolling-annealing-coating-performance inspection-packaging,

[0036] 1. The silicon content of molten steel is smelted to 3.3%, and other components are smelted to target components.

[0037] 2. Continuous casting is used to cast molten steel into billets, and the superheat of molten steel is 25°C. A feeding device 1 is added in the continuous casting crystallizer 5. The inside of the feeding device 1 is a cavity 4. One end of the feeding device 1 is o...

Embodiment 3

[0044] The weight percent of the chemical composition of steel in the embodiment of the present invention is: C: 0.003%, Si: 5.7%, Als: 0.22%, Mn: 0.45%, P: 0.015%, S: 0.0035%, N: 0.0020%, and the rest is iron and unavoidable impurity elements.

[0045] The detection results of Example 3 of the present invention are shown in Table 3.

[0046] Embodiment 3 of the present invention is a production method of intermediate frequency magnetically shielded silicon steel, including smelting-continuous casting-hot rolling-pickling-cold rolling-annealing-coating-performance inspection-packaging,

[0047]1. The silicon content of molten steel is smelted to 3.1%, and other components are smelted to target components.

[0048] 2. Continuous casting is used to cast molten steel into billets, and the superheat of molten steel is 40°C. A feeding device 1 is added inside the continuous casting crystallizer 5, the inside of the feeding device 1 is a cavity 4, one end of the feeding device 1 i...

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Abstract

The invention provides a production method for intermediate-frequency magnetic shielding silicon steel. The production method comprises the steps of smelting, continuous casting, hot rolling, pickling, cold rolling, annealing, coating, performance testing and packaging; as for smelting, molten steel is smelted until the silicon content is 2.0%-3.5%, and other element ingredients are smelted to target ingredients; as for continuous casting, the molten steel superheat degree is 20-60 DEG C, a charging device is arranged in a continuous casting crystallizer, steel particles are added into the molten steel in the charging device, the added steel particles need to be heated to 400 DEG C or above, the mass percentage content of steel particle silicon is 0.5%-2.0% higher than the mass percentagecontent of target ingredient silicon, other element ingredients are the same as the target element ingredients, and the particle size of steel particles is 1.0-5.0 mm; the steel particles exist in a casting blank in a molten state or semi-solid state; and as for annealing, the annealing temperature is 600-1000 DEG C, and the temperature holding time is 10-400 min. The production method adopts lowsilicon electric steel to protect hot rolling heating oxidation of high silicon electric steel, and the yield is improved.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a production method of electrical steel. Background technique [0002] Silicon steel loss mainly includes eddy current loss and hysteresis loss. The resistivity of steel increases with the increase of silicon content, and the eddy current generated decreases, thereby reducing the eddy current loss. The hysteresis loss is mainly related to the grain size and orientation of the steel, which is caused by the magnetostriction of the magnetic domain magnetization process. In 1928, Schultz found that when the silicon content was 6.5%, the magnetostriction was approximately zero. So the iron loss is lower. High-silicon steel has good magnetic properties. The strength and hardness of steel increase with the increase of silicon content, but when the silicon content exceeds 4.5%, the strength and hardness decrease rapidly with the increase of silicon content, and the elongation is almost z...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04B22D11/103C21D8/12C22C38/02C22C38/04
CPCB22D11/103C21D8/12C22C33/04C22C38/02C22C38/04
Inventor 张智义李亚东高振宇陈春梅胡洪旭张仁波刘文鹏李文权
Owner ANGANG STEEL CO LTD
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