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Levelling method of non-oriented electrical steel

A kind of oriented electrical steel, flattening technology, applied in the direction of manufacturing tools, metal processing equipment, metal rolling, etc., can solve the problem of electromagnetic performance decline, achieve the effect of improving quality, ensuring electromagnetic performance, and ensuring plate shape and surface quality

Inactive Publication Date: 2009-02-04
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the electromagnetic performance of the non-oriented electrical steel is reduced when the existing flattening process and method are applied to the existing ordinary horizontal continuous annealing production line, the technical problem to be solved by the present invention is to provide a method that can ensure the electromagnetic performance of the product. Non-oriented electrical steel smoothing method

Method used

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  • Levelling method of non-oriented electrical steel

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Effect test

Embodiment 1

[0026] After the non-oriented electrical steel is annealed and cooled to room temperature in an ordinary horizontal continuous annealing furnace, it enters a tempering machine for leveling. Adopt the leveling method of the present invention, control the leveling elongation below 0.1%, and produce 50PW800L brand non-oriented electrical steel. The production process parameters and product electromagnetic properties before and after the implementation of the present invention are shown in Table 2.

[0027] Table 2 50PW800L grade non-oriented electrical steel smoothing process parameters and comparison of electromagnetic properties

[0028]

[0029] As can be seen from Table 2, after adopting the leveling method of the present invention, the electromagnetic properties of 50PW800L grade non-oriented electrical steel are significantly improved, and the iron loss P 15 From 6.2W / Kg when applying the existing leveling method to 5.6W / Kg, the magnetic induction is from B 50 Fr...

Embodiment 2

[0031] The non-oriented electrical steel is continuously annealed in an ordinary horizontal continuous annealing furnace and cooled to room temperature, and then enters a tempering machine for leveling. Adopt the leveling method of the present invention, control the leveling elongation below 0.1%, and produce 50PW1000L brand non-oriented electrical steel. The production process parameters and product electromagnetic properties before and after the implementation of the present invention are shown in Table 3.

[0032] Table 3 50PW1000L grade non-oriented electrical steel smoothing process parameters and comparison of electromagnetic properties

[0033]

[0034] As can be seen from Table 3, after adopting the leveling method of the present invention, the electromagnetic properties of 50PW1000L grade non-oriented electrical steel are significantly improved, and the iron loss P 15 From 7.4W / Kg when applying the existing leveling method to 6.8W / Kg, the magnetic induction ...

Embodiment 3

[0036] After the non-oriented electrical steel is annealed and cooled to room temperature in an ordinary horizontal continuous annealing furnace, it enters a tempering machine for leveling. Adopt the leveling method of the present invention, control the leveling elongation below 0.1%, and produce 50PW1000L brand non-oriented electrical steel. The production process parameters and product electromagnetic properties before and after the implementation of the present invention are shown in Table 4.

[0037] Table 4 50PW1000L grade non-oriented electrical steel smoothing process parameters and comparison of electromagnetic properties

[0038]

[0039] As can be seen from Table 4, after adopting the leveling method of the present invention, the electromagnetic properties of 50PW1000L grade non-oriented electrical steel are significantly improved, and the iron loss P 15 From 7.4W / Kg when applying the existing leveling method to 6.4W / Kg, the magnetic induction is from B 50...

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Abstract

The invention discloses a non-oriented electrical steel leveling method capable of guaranteeing the magnetic property of products in the field of steel rolling. In order to guarantee the magnetic property of non-oriented electrical steel, the leveling elongation percentage is less than 0.1 percent, the unit width rolling force is from 80kN / m to 200kN / m, and the leveling tensile stress is from 10MPa to 30MPa. According to the characteristics of the non-oriented electrical steel that the transverse thickness difference is equal to 10 microns and the leveling elongation percentage is less than 0.1 percent, and in order to guarantee the uniform transverse distribution of rolling forces and improve produt surface quality, the non-oriented electrical steel is rolled by a working roller and a supporting roll which are in a shape of special function curve which is composed of a cosine function and an evenorder power function in a leveling machine. The invention does not increase the equipment improvemng investment and the production cost, is simple and easy to implement, and is especially suitable for the production of the non-oriented electrical steel on the common horizontal continuous anneal production lines.

Description

technical field [0001] The invention relates to a production method of non-oriented electrical steel, in particular to a method for smoothing non-oriented electrical steel. Background technique [0002] Non-oriented electrical steel, in addition to the main requirements for its electromagnetic properties, also usually has requirements for its plate shape and surface quality, so as to ensure the lamination coefficient of non-oriented electrical steel, so non-oriented electrical steel is usually used in special non-oriented electrical steel Steel continuous annealing coating line production. The special non-oriented electrical steel continuous annealing coating production line adopts equipment and processes such as carbon sleeve furnace rolls and thermal tension leveling, which can completely guarantee the shape and surface quality of non-oriented electrical steel products, and does not require non-oriented electrical steel products after annealing. The electrical steel is fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12B21B37/56B21B37/58B21B37/48B21B27/02B21B29/00
Inventor 李俊洪李军樊华冯楷荣熊旭梁英王飞龙林霞邓澄
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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