Production method for intermediate-frequency magnetic shielding silicon steel

A production method and magnetic shielding technology, applied in the field of metal materials, can solve the problems of limited production efficiency, high production cost, and brittleness of high silicon steel hot-rolled slab heating, oxidation and cold-rolling, so as to avoid edge cracking, reduce belt breakage, improve The effect of processability

Active Publication Date: 2018-07-13
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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  • Production method for intermediate-frequency magnetic shielding silicon steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The weight percentage of the chemical composition of the 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 inevitable impurity elements. The detection results of Example 1 of the present invention are shown in Table 1.

[0024] The production method of intermediate frequency magnetic shielding silicon steel in Example 1 of the present invention includes smelting-continuous casting-hot rolling-pickling-cold rolling-annealing-coating-performance inspection-packaging,

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

[0026] 2. The molten steel is cast into billets by continuous casting, with a superheat of 55℃. A feeding device 1 is provided in the continuous casting mold 5, one end of the feeding device 1 is open and the opening is downward, and the interior of the feeding device 1 is a cavity 4, and the f...

Embodiment 2

[0033] The weight percentage of the chemical composition of the 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] The production method of intermediate frequency magnetic shielding silicon steel in Example 2 of the present invention includes smelting-continuous casting-hot rolling-pickling-cold rolling-annealing-coating-performance inspection-packaging,

[0036] 1. Smelt molten steel with a silicon content of 3.3%, and smelt other components to the target composition.

[0037] 2. The molten steel is cast into billets by continuous casting, with a superheat of 25℃. A feeding device 1 is added to the continuous casting mold 5, and the interior of the feeding device 1 is a cavity 4, one end of the feeding device 1 is open and the opening is downward, the ...

Embodiment 3

[0044] The weight percentage of the chemical composition of the 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] The method for producing intermediate frequency magnetic shielding silicon steel in Example 3 of the present invention includes smelting-continuous casting-hot rolling-pickling-cold rolling-annealing-coating-performance inspection-packaging,

[0047] 1. Smelt molten steel with a silicon content of 3.1%, and smelt other components to the target composition.

[0048] 2. Using continuous casting method to cast molten steel into billets, the superheat of molten steel is 40℃. A feeding device 1 is added to the continuous casting mold 5, the interior of the feeding device 1 is a cavity 4, one end of the feeding device 1 is open and the opening ...

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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, and particularly relates 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, the eddy current generated decreases, and the eddy current loss decreases. The hysteresis loss is mainly related to the grain size and orientation of the steel, and is caused by the magnetostriction of the magnetic domain magnetization process. In 1928, Schultz discovered that when the silicon content is 6.5%, the magnetostriction is approximately zero. So the iron loss is lower. High silicon steel has good magnetic properties. The strength and hardness of the steel increase with the increase of the 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 Applications(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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