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Production method of low iron loss high magnetic sensing cold milling orientation less electrical steel plate

A technology of grain-oriented electrical steel sheet and production method, applied in the direction of manufacturing tools, other manufacturing equipment/tools, etc., can solve the problems of low equipment utilization rate, low nitrogen heat transfer efficiency, long annealing time, etc.

Inactive Publication Date: 2007-07-18
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second method increases the alloy cost of the steel
The non-oxidizing atmosphere referred to in the present invention refers to nitrogen or nitrogen-hydrogen mixed gas, but under the conditions of bell furnace treatment, in order to obtain uniform magnetism in the strip length direction, the temperature difference between the edge and the middle of the steel coil should be small, so the annealing time must be long, since there are N 2 However, the nitriding of the strip surface is still unavoidable, and the heat transfer efficiency of nitrogen is low, the annealing time is long, and the utilization rate of equipment is low

Method used

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  • Production method of low iron loss high magnetic sensing cold milling orientation less electrical steel plate
  • Production method of low iron loss high magnetic sensing cold milling orientation less electrical steel plate
  • Production method of low iron loss high magnetic sensing cold milling orientation less electrical steel plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Converter, RH vacuum treatment and continuous casting to obtain the continuous casting slab with the composition shown in Table 1, and hot rolled into 2.4mm thick hot rolled plate. The normalization treatment was carried out according to the process shown in Table 2, and thereafter pickled and cold-rolled to form a 0.50 mm thick cold-rolled sheet. The magnetic detection results are shown in Table 2.

[0040] Table 1 wt%

[0041] furnace number

C

mn

P

Si

S

N

Al

sn

Sb

1

0.0023

0.50

0.20

0.10

0.0030

0.0015

0.50

2

0.0015

0.10

0.018

3.50

0.0045

0.0015

1.50

3

0.010

0.30

0.015

1.45

0.0080

0.0025

0.25

4

0.0050

1.50

0.02

0.50

0.0020

0.0030

0.001

5

0.0030

0.35...

Embodiment 2

[0045] After the component 1 in Table 1 in the embodiment is treated according to the normalization process shown in Table 2, softening annealing at 750 ° C × 30s is performed after the first cold rolling, and then 2% reduction rate is smoothed to 0.5mm, and the magnetic properties are measured The samples were annealed at 750°C×1h, and the magnetic properties were measured. The results of the magnetic properties are shown in Table 3.

[0046] Example 2:

[0047] After the component 1 in Table 1 in the embodiment is treated according to the normalization process shown in Table 2, softening annealing at 750 ° C × 30s is performed after the first cold rolling, and then 2% reduction rate is smoothed to 0.5mm, and the magnetic properties are measured The samples were annealed at 750°C×1h, and the magnetic properties were measured. The results of the magnetic properties are shown in Table 3.

[0048] table 3

[0049]

[0050] As can be seen from Table 2 and Table 3, the...

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Abstract

The present invention relates to a method for producing low-iron-loss high-magnetic-induction cold-rolled non-oriented electrical steel strip by using cap cover furnace annealing treatment. Said method includes the following steps: (a), raw material preparation: including (by wt%) C, its content is loss than or equal to 0.010%; Si, its content is 0.1-3.50%; Al, its content is less than or equal to 1.5%; Man, its content is 0.10%-1.50%; P, is content is less than or equal to 0.20%; S, its content is less than or equal to 0.008%; N, its content is less than or equal to 0.0030%, and the rest is iron and inevitable impurity; (b), smelting, continuous casting and hot-rolling; (c), normalizing treatment, making hot-rolled sheet undergo the process of normalizing treatment, under the condition of cap cover furnace making full hydrogen annealing, annealing temperature is 700 deg.C-900deg.C; (d), cold-rolling to obtain cold-rolled sheet; and (e), annealing treatment, making cold-rolled sheet undergo the process of annealing treatment so as to obtain the invented product.

Description

technical field [0001] The invention relates to a cold-rolled non-oriented electrical steel sheet, in particular to a production method of a cold-rolled non-oriented electrical steel sheet with excellent magnetic properties. Background technique [0002] Cold-rolled non-oriented electrical steel with high magnetic induction and low iron loss is a hot spot in the development of non-oriented electrical steel in recent years. It is developed to meet the requirements of high efficiency and miniaturization for various types of motors and electronic transformer cores in recent years. The loss of the motor mainly includes two parts, one is the iron loss, that is, the core loss, and the other is the copper loss, that is, the loss caused by the wire resistance. For cold-rolled non-oriented electrical steel, iron loss is mainly composed of hysteresis loss and eddy current loss. In general, in order to reduce the eddy current loss, measures such as increasing the content of Si, Al and...

Claims

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Application Information

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IPC IPC(8): B23P23/04C22C38/06C21D7/00
Inventor 王波陈晓樊泉于志钢马爱华谢世殊
Owner BAOSHAN IRON & STEEL CO LTD
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