Non-oriented electrical steel good in weldability and magnetism and production method

A technology of oriented electrical steel and weldability, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of magnetic deterioration of non-oriented electrical steel, reduce magnetic deterioration, improve weldability, Effect of reducing welding porosity

Active Publication Date: 2017-05-31
武汉钢铁有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The product produced by this method has a thicker oxide layer, which seriously deteriorates the magnetic properties of non-oriented electrical steel, and is only suitable for the production of ordinary blue strips.

Method used

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  • Non-oriented electrical steel good in weldability and magnetism and production method
  • Non-oriented electrical steel good in weldability and magnetism and production method

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Embodiment Construction

[0025] The present invention is described in detail below:

[0026] Table 1 is the list of chemical components of each embodiment of the present invention;

[0027] Table 2 is a list of main process parameters and performance conditions of each implementation case of the present invention.

[0028] Each implementation case of the present invention all produces according to the following steps:

[0029] 1) After steelmaking, hot rolling, pickling and cold rolling to the thickness of the finished product;

[0030] 2) Carry out bluing treatment after finished product annealing: directly carry out bluing treatment after continuous annealing, and the atmosphere for controlling bluing is N 2 and water vapor H 2 The mixed gas of O has a dew point of 20-75°C, a bluing temperature of 450-700°C, a plate-through speed of 50-100m / min, and the ratio of the furnace temperature to the plate-through speed is required to be 5.0-10;

[0031] 3) Carry out sampling, coiling, packaging and ins...

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Abstract

Non-oriented electrical steel good in weldability and magnetism is composed of, by weight, 0-0.0030% of C, 0.8%-1.7% of Si, 0.2%-0.8% of Mn, 0-0.0050% of S, 0.01%-0.15% of P, 0-0.030% of Al, 0-0.0050% of N, 0-0.05% of Sn and/or Sb. A production method comprises the steps that steel making, hot rolling, pickling and cold rolling are conducted, and then the thickness of a finished product is achieved; after the finished product is subjected to annealing, bluing treatment is conducted; and sampling, reeling, packaging and inspection are conducted. According to the non-oriented electrical steel good in weldability and magnetism and the production method, the weldability of the product is improved while interlamination resistance is kept, weld porosity, broken welding and other defects are decreased; through control over the atmosphere, temperature and dew point of oxidation and bluing, unit speed and bluing temperature of a non-oriented electrical steel sheet, the interlamination resistance is improved, meanwhile, magnetism deterioration caused by surface oxidation can be reduced to the smallest extent, and the magnetism of the finished product is ensured, specifically, a 0.50 mm sheet B50 is larger than or equal to 1.75 T, and P1.5/50 is smaller than or equal to 5.0 W/kg.

Description

technical field [0001] The invention relates to a non-oriented electrical steel and a production method, in particular to a non-oriented electrical steel with excellent weldability and magnetic properties and a production method. Background technique [0002] The performance of non-oriented electrical equipment is not only reflected in various magnetic indicators (iron loss, magnetic induction, magnetic permeability, etc.), but its processing performance (punching, welding) also greatly affects the applicability of the product. The magnetic properties affect the performance of the motor, and the processing performance affects the stability and production efficiency of the motor manufacturing. The stator cores of most motors are made by pressing or riveting silicon steel sheets, but some stator cores are also made by welding. Since the surface of non-oriented silicon steel in the whole process is coated with coatings, some of the coatings are semi-organic coatings or organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/60C21D8/12C23C8/14
CPCC21D8/1255C22C38/004C22C38/008C22C38/02C22C38/04C22C38/06C22C38/60C23C8/14
Inventor 郑泽林黎世德冯大军李准骆忠汉
Owner 武汉钢铁有限公司
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