Non-oriented electrical steel and production method thereof

A technology of oriented electrical steel and mass percentage, which is applied in the field of steel material production, can solve problems such as loss, difficulty in improving magnetic induction and iron loss performance, and achieve the effect of reducing iron loss

Active Publication Date: 2014-06-25
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All the above methods are aimed at improving the iron loss or magnetic induction performance alone. When one performance is improved, the othe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] For the non-oriented electrical steel provided in the embodiment of the present invention, the chemical composition percentage (%) of the continuous casting slab is as shown in the experimental group in Table 1,

[0032] Table 1 Main chemical composition of continuous casting slabs (%)

[0033] test group

[0034]

[0035] The method for producing the above-mentioned non-oriented electrical steel provided in the embodiment of the present invention specifically includes the following steps:

[0036] (1) Send the continuous casting slabs of the experimental group into the heating furnace for heating, and the heating temperature is 1150°C;

[0037] (2) Hot rolling, the finishing rolling temperature of hot rolling is 1020°C, and the finishing rolling temperature is 870°C;

[0038] (3) coiling, the coiling temperature is 710°C, and then a hot-rolled sheet is obtained, wherein the thickness of the hot-rolled sheet is 2.3mm;

[0039] (4) Pickling, pick...

Embodiment 2

[0048] The difference between this embodiment and Embodiment 1 is that the method for producing the non-oriented electrical steel provided in this embodiment specifically includes the following steps:

[0049] (1) Send the continuous casting slabs of the experimental group into the heating furnace for heating, and the heating temperature is 1120°C;

[0050] (2) Hot rolling, the finishing rolling temperature of hot rolling is 1010°C, and the finishing rolling temperature is 890°C;

[0051] (3) coiling, the coiling temperature is 690°C, and then a hot-rolled sheet is obtained, wherein the thickness of the hot-rolled sheet is 2.5mm;

[0052] (4) Pickling, pickling with a sulfuric acid solution with a concentration of 4%, the temperature of the pickling is 90°C, and the pickling time is 300s to clean the surface oxide scale of the hot-rolled plate;

[0053] (5) Cold rolling, cold rolling the hot-rolled plate after pickling, and rolling the steel plate to a thickness of 0.48mm;

...

Embodiment 3

[0057] The difference between this embodiment and Embodiment 1 is that the method for producing the non-oriented electrical steel provided in this embodiment specifically includes the following steps:

[0058] (1) Send the continuous casting slabs of the experimental group into the heating furnace for heating, and the heating temperature is 1080°C;

[0059] (2) Hot rolling, the finishing rolling temperature of hot rolling is 1000°C, and the finishing rolling temperature is 880°C;

[0060] (3) coiling, the coiling temperature is 720°C, and then a hot-rolled sheet is obtained, wherein the thickness of the hot-rolled sheet is 2.2mm;

[0061] (4) Pickling, pickling with a sulfuric acid solution with a concentration of 4%, the temperature of the pickling is 80°C, and the pickling time is 500s to clean the surface oxide scale of the hot-rolled plate;

[0062] (5) Cold rolling, cold rolling the hot-rolled plate after pickling, and rolling the steel plate to a thickness of 0.50mm;

...

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Abstract

The invention discloses non-oriented electrical steel. The non-oriented electrical steel comprises the following chemical components in percent by weight: not greater than 0.005% of C, 0.1%-1.0% of Si, 0.30%-1.2% of Mn, 0.2%-0.4% of Al, 0.02%-0.1% of P, not greater than 0.01% of S, not greater than 0.008% of N, not greater than 0.015% of O, not greater than 0.002% of B, 0.04%-0.12% of Sn, not greater than 0.003% of Sb, not greater than 0.003% of Nb, not greater than 0.003% of Ti, 0.005%-0.016% of Ce, and the balance of Fe and other trace elements. The invention further discloses a method of producing the non-oriented electrical steel. According to the invention, Ce and Sn elements are compounded and added in components of the conventional non-oriented electrical steel with Si less than 1%, so that respective effect of the two elements is brought into play, and therefore, contradiction between magnetic induction improving and iron loss lowering is effectively solved; hot rolled plate normalizing treatment is not carried out under the same (Si+Al) content through processes such as continuous casting, hot rolling, acid pickling, cold rolling back, and the like, so that iron loss is lowered by 0.4w/kg-0.8w/kg, and magnetic induction is improved by 0.01T-0.02T at the same time.

Description

technical field [0001] The invention relates to the technical field of steel material production, in particular to a non-oriented electrical steel and a production method thereof. Background technique [0002] Electrical steel is a silicon-iron soft magnetic alloy with very low carbon content, and it is an indispensable and important material in electric power, electronics and military industries. According to statistics, the total output of electrical steel in the world in 2000 was 6.714 million tons, and by 2005 it had exceeded 8 million tons. At present, the consumption in the domestic market has far exceeded 3 million tons. Among them, non-oriented silicon steel is the iron core material of the motor and generator rotor working in the rotating magnetic field, which requires good magnetic properties and process performance. In recent years, with the development of high-speed and miniaturized motors, higher requirements have been put forward for the performance requireme...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C33/04C21D8/02C21D8/12
Inventor 姚志强刘杰王全礼李飞王崇学耿立
Owner SHOUGANG CORPORATION
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