Heat-resistant magnetic domain refined-type oriented silicon steel and manufacturing method thereof

A technology of magnetic domain refinement and oriented silicon steel, which is used in the manufacture of inductors/transformers/magnets, manufacturing tools, magnetic objects, etc., which can solve the problem of the reduction of the lamination coefficient of silicon steel sheets, the difficulty in obtaining oriented silicon steel sheets, and the conduction between transformer sheets, etc. question

Active Publication Date: 2019-10-11
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat-resistant scoring technology realized by electrochemical means has complex procedures, a certain degree of chemical pollution, and poor controllability of the shape and depth of the grooves formed, making it difficult to obtain grain-oriented silicon steel sheets with stable and uniform magnetic properties.
The heat-resistant scoring technology achieved by mechanical pressure has extremely high requirements on the toothed rollers of the mechanical device, and the high hardness of the magnesium silicate bottom layer on the surface of the oriented silicon steel will cause the toothed rollers to wear quickly, resulting in high cost for mass scoring
Grooves are formed by multiple laser scans, which require high repeat positioning accuracy and face difficulties in assembly line production
Grooves or remelting zones are formed by laser thermal melting, and crater-shaped protrusions and spatters are likely to be generated on and around the edge of the grooves, resulting in a decrease in the lamination coefficient of the silicon steel sheets, and the transformer made has sheets during service. Risk of conduction between

Method used

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  • Heat-resistant magnetic domain refined-type oriented silicon steel and manufacturing method thereof
  • Heat-resistant magnetic domain refined-type oriented silicon steel and manufacturing method thereof
  • Heat-resistant magnetic domain refined-type oriented silicon steel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-22 and comparative example 1-10

[0063] Table 1 lists the characteristic parameters of the grooves of the heat-resistant magnetic domain refinement grain-oriented silicon steel of Examples 1-22 and Comparative Examples 1-10.

[0064] Table 1.

[0065]

[0066]

[0067] in,

[0068] The heat-resistant magnetic domain refinement type grain-oriented silicon steel of Examples 1-22 and Comparative Examples 1-10 was prepared by the following steps:

[0069] (1) The oriented silicon steel is subjected to ironmaking, steelmaking, continuous casting, hot rolling, and then cold rolling to a final thickness of 0.23mm;

[0070] (2) After the decarburization annealing process at 850 ° C, the surface oxide layer is formed, and the MgO release agent is coated on the surface, and rolled into a steel coil;

[0071] (3) Keeping it under the condition of high temperature annealing at 1200°C for 20 hours, then coating the surface with an insulating coating and performing final annealing to form a oriented silicon steel...

Embodiment 23-37 and comparative example 11-15

[0089] Table 4 lists the characteristic parameters of the grooves of the heat-resistant magnetic domain refining grain-oriented silicon steel of Examples 23-37 and Comparative Examples 11-15.

[0090] Table 4.

[0091]

[0092]

[0093] in,

[0094] The heat-resistant magnetic domain refinement type grain-oriented silicon steel of Examples 23-37 and Comparative Examples 11-15 was prepared by the following steps:

[0095] (1) The oriented silicon steel is subjected to ironmaking, steelmaking and hot rolling processes, and then cold rolled to 0.26mm;

[0096] (2) Implement laser scoring on both sides of the cold-rolled sheet (the specific process parameters of the laser scoring are listed in Table 5);

[0097] (3) Decarburizing and annealing the scored cold-rolled sheet at 850°C to form a surface oxide layer, coat the surface with MgO release agent, and roll it into a steel coil;

[0098] (4) Keep it under the condition of high temperature annealing at 1200° C. for 20...

Embodiment 38-54 and comparative example 16-21

[0108] Table 7 lists the characteristic parameters of the grooves of the heat-resistant magnetic domain refinement grain-oriented silicon steel of Examples 38-54 and Comparative Examples 16-21.

[0109] Table 7.

[0110]

[0111] in,

[0112] The heat-resistant magnetic domain refinement grain-oriented silicon steels of Examples 38-54 and Comparative Examples 16-21 were prepared by the following steps:

[0113] (1) Go through iron-making, steel-making, and hot-rolling processes for oriented silicon steel, and then go through a cold rolling process to 0.226mm;

[0114] (2) After decarburization annealing, apply MgO release agent on the surface of the steel plate and dry it, and then roll it into a steel coil;

[0115] (3) Maintaining for 20 hours under high-temperature annealing conditions at 1200° C., cleaning off the unreacted residual MgO on the surface, and obtaining a cold-rolled sheet;

[0116] (4) Implement laser scoring on one side of the cold-rolled sheet, and ...

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Abstract

The invention discloses a heat-resistant magnetic domain refined-type oriented silicon steel. A plurality of parallel grooves formed in a nicking mode are formed in a single-face surface or a double-face surface of the heat-resistant magnetic domain refined-type oriented silicon steel, wherein each groove extends in the width direction of the heat-resistant magnetic domain refined-type oriented silicon steel, and the parallel grooves are evenly distributed in the rolling direction of the heat-resistant magnetic domain refined-type oriented silicon steel. Each groove extending in the width direction of the heat-resistant magnetic domain refined-type oriented silicon steel is formed by splicing a plurality of sub-grooves extending in the width direction of the heat-resistant magnetic domainrefined-type oriented silicon steel. The invention further discloses a manufacturing method of the heat-resistant magnetic domain refined-type oriented silicon steel. The method comprises the steps: forming the grooves in the single-face surface or the double-face surface of the heat-resistant magnetic domain refined-type oriented silicon steel in a laser nicking mode, and dividing a laser beam ofthe laser nicking into a plurality of sub-beams by an optical splitter, wherein the sub-beams form the sub-grooves spliced into the same groove.

Description

technical field [0001] The invention relates to a grain-oriented silicon steel and a manufacturing method thereof, in particular to a magnetic domain refinement type grain-oriented silicon steel and a manufacturing method thereof. Background technique [0002] A transformer is a basic component in a power transmission system. Its core is usually made of oriented silicon steel laminated or wound. The core loss is usually referred to as iron loss for short. Due to the increasingly prominent global energy and environmental problems, the demand for energy saving and consumption reduction is increasing worldwide. Reducing the iron loss of oriented silicon steel is of great significance to the national economy and social environmental protection. [0003] Refining the magnetic domain, that is, reducing the width of the magnetic domain, can effectively reduce the abnormal eddy current loss, and is an important method to reduce the loss of oriented silicon steel. In the prior art, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/245B23K26/067H01F41/02
CPCH01F27/245B23K26/364B23K26/0673H01F41/0233B23K26/067H01F41/02C21D8/1294C21D2261/00H01F1/14775C21D9/46H01F1/16C21D8/12C21D10/005C22C38/02B23K26/0622B23K2103/04B23K2101/38B23K26/0626B23K26/0665C21D6/008C21D8/1222C21D8/1255H01F1/147
Inventor 储双杰赵自鹏杨勇杰马长松吴美洪吉亚明马爱华谢伟勇刘海郭建国
Owner BAOSHAN IRON & STEEL CO LTD
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