Electrical steel and preparation method thereof

A technology of electrical steel and steel coils, applied in the field of iron and steel, can solve the problems of inability to promote low-hardness electrical steel products and high hardness, and achieve the effects of reducing iron loss, increasing magnetic induction intensity, and reducing hardness

Active Publication Date: 2021-10-01
湖南华菱涟钢特种新材料有限公司 +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing bell annealing process mainly produces semi-process annealed electrical steel, which has high hardness and cannot be applied to low-hardness electrical steel products

Method used

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  • Electrical steel and preparation method thereof
  • Electrical steel and preparation method thereof
  • Electrical steel and preparation method thereof

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Embodiment Construction

[0026] The implementation manner of the present application will be further described in detail below with reference to the drawings and embodiments. The detailed description and drawings of the following embodiments are used to illustrate the principles of the application, but not to limit the scope of the application, that is, the application is not limited to the described embodiments.

[0027] In the description of this application, it should be noted that, unless otherwise specified, the meaning of "plurality" is more than two; the terms "upper", "lower", "left", "right", "inner", " The orientation or positional relationship indicated by "outside" and so on are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a reference to this app...

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Abstract

The invention provides electrical steel and a preparation method thereof. The preparation method comprises the steps that hot rolling is conducted on a slab of the electrical steel to obtain a steel coil; the hot-rolled steel coil is subjected to acid pickling and cold rolling; the steel coil subjected to acid pickling and cold rolling is subjected to first-time cover annealing; the steel coil subjected to first-time cover annealing is flattened; the flattened steel coil is subjected to second-time cover annealing; and the steel coil obtained after second-time cover annealing is rewound, and the electrical steel is obtained. According to the preparation method of the electrical steel, two times of cover annealing are adopted, the main purpose of annealing is to eliminate work hardening generated in the acid pickling and cold rolling process, a steel plate is fully recrystallized, and the ideal iron loss and magnetic induction intensity are obtained. Compared with a one-time cover annealing process, two-time cover annealing is adopted, the iron loss can be further reduced, and the magnetic performance of the electrical steel is improved.

Description

technical field [0001] The application relates to the field of iron and steel, in particular to an electrical steel and a preparation method thereof. Background technique [0002] At present, domestic non-oriented electrical steel is produced by continuous annealing coating process production line. The products are mostly used in parts such as rotors, compressors and generators. The products have excellent performance, but the production cost is relatively high. Bell annealing is the annealing of cold-rolled strips in a bell furnace in the form of stacking without coating. Compared with the continuous annealing process, it has obvious cost advantages and environmental protection advantages. [0003] The existing bell-type annealing process mainly produces semi-process annealed electrical steel, which has high hardness and cannot be applied to low-hardness electrical steel products. Contents of the invention [0004] The purpose of this application is to provide an electri...

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Application Information

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IPC IPC(8): C21D1/26C21D6/00C21D8/12C22C33/06C22C38/02C22C38/04C22C38/06C22C38/14C22C38/60
CPCC21D1/26C21D6/005C21D6/008C22C38/02C22C38/04C22C38/004C22C38/002C22C38/06C22C38/14C22C38/60C22C33/06C21D8/1216C21D8/1244
Inventor 谢凯吴泽交李慈颖吴高亮宋伟李江李国仓田飞邓必荣李光辉陈振文
Owner 湖南华菱涟钢特种新材料有限公司
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