Non-oriented electrician steel thin strip and production method thereof

A technology of grain-oriented electrical steel and production method, which is applied in the directions of manufacturing tools, heat treatment baths, heat treatment equipment, etc., can solve the problems of reduced efficiency, restricted heating speed, and difficulty in improving heating speed, and achieves improved magnetic properties, fast heating speed, and fast heating. Effects of heating and oxidation

Inactive Publication Date: 2018-11-06
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, due to the Curie point (ferromagnetic disappearance temperature) of electrical steel, when induction heating is used to increase the heating temperature of the steel strip, the efficiency of induction heating above the Curie point temperature is greatly reduced, and the heating speed is restricted.
However, the heating rate of other methods is difficult to increase, and a new high-speed heating method is required.
However, using electromagnetic heating method, how to avoid surface oxidation caused by oxygen and nitrogen in the atmosphere is a difficult problem

Method used

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  • Non-oriented electrician steel thin strip and production method thereof
  • Non-oriented electrician steel thin strip and production method thereof
  • Non-oriented electrician steel thin strip and production method thereof

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Embodiment Construction

[0029] The specific embodiment of the present invention will be described in further detail by describing the embodiments below with reference to the accompanying drawings, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and contribute to its implementation.

[0030] After smelting, continuous casting, hot rolling, and then pickling and cold rolling to the finished thickness and width of the electrical steel strip, annealing is required to obtain the required properties.

[0031] The invention discloses a non-oriented electrical steel strip, which contains chemical components and weight percentages: C0.0020-0.0030%, Si 3.0-3.20%, Mn 0.15-0.25%, S 0.0006-0.0010%, Al 1 -1.5%, N0.0015-0.0025%, Sn 0.008-0.012%; the rest is Fe and unavoidable impurities.

[0032]The raw materials involved in the present invention can be obtained through converter smelting a...

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Abstract

The invention discloses a non-oriented electrician steel thin strip and a production method thereof. The non-oriented electrician steel thin strip is prepared from the following chemical components inpercentage by weight: 0.0020 to 0.0030% of C (carbon), 3.0 to 3.20% of Si (silicon), 0.15 to 0.25% of Mn (manganese), 0.0006 to 0.0010% of S (sulfur), 1 to 1.5% of Al (aluminum), 0.0015 to 0.0025% ofN (nitrogen), 0.008 to 0.012% of Sn (selenium), and the balance of Fe (iron) and unavoidable impurities. The production method comprises the following steps of normalizing and pickling, and cold-rolling into 0.27mm and 0.20mm products, so as to obtain rolled hard coils.

Description

technical field [0001] The invention belongs to the technical field of heat treatment for the production of non-oriented electrical steel, and in particular relates to a non-oriented electrical steel thin strip and a production method thereof. Background technique [0002] Modern cold-rolled electrical steel production requires annealing. The current annealing is completed by a continuous annealing furnace, and the general annealing is directly heated by gas combustion, and then heated by a completely isolated radiant tube. The protective gas (nitrogen-hydrogen mixed gas) used in the continuous annealing furnace of cold-rolled electrical steel prevents (reduces) the occurrence of surface oxidation, internal oxidation and internal nitriding under high temperature conditions, and improves the performance of cold-rolled electrical steel. The protective gas maintains a positive pressure to prevent the gas outside the furnace from entering the furnace. [0003] The heating rate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/12C21D1/46
CPCC22C38/02C21D1/46C21D8/1272C22C38/001C22C38/004C22C38/008C22C38/04C22C38/06
Inventor 裴英豪杜军夏雪兰王立涛沈新玉丰慧张振海刘青松
Owner MAANSHAN IRON & STEEL CO LTD
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