Low-noise feature oriented silicon steel and manufacturing method thereof

A technology of oriented silicon steel and a manufacturing method, applied in the field of electrical steel and its manufacturing, can solve the problem of not reducing the magnetostriction of the steel plate, and achieve the effect of reducing the magnetostrictive performance, reducing the overall noise level and the overall noise level.

Active Publication Date: 2016-01-06
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical solution disclosed in this US patent achieves the purpose of reducing iron loss through mirror surface and large coating tension, but this technical solution does not reduce the magnetostriction of the steel plate

Method used

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  • Low-noise feature oriented silicon steel and manufacturing method thereof
  • Low-noise feature oriented silicon steel and manufacturing method thereof
  • Low-noise feature oriented silicon steel and manufacturing method thereof

Examples

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Embodiment A1-A6 and comparative example B1-B2

[0050] Obtain embodiment and comparative example by the manufacturing method of low-noise characteristic grain-oriented silicon steel of the present invention, it comprises steps:

[0051] 1) smelting and casting into slabs, during the smelting process, controlling the proportioning of each chemical element in the silicon steel substrates of the examples and comparative examples;

[0052] 2) Heating: heating to 1200-1280°C, holding the temperature for 1-4 hours, and hot-rolling into strip steel;

[0053] 3) Normalization: firstly heat to 1100-1200°C, then cool down to 900-1000°C at a cooling rate of 1°C / s-10°C / s; then cool at a cooling rate of 10°C / s-70°C / s to room temperature;

[0054] 4) Cold rolling: adopt primary cold rolling or secondary cold rolling with an intermediate annealing step, and the finished product thickness H after cold rolling is 0.27-0.35mm;

[0055] 5) Decarburization annealing: perform a recrystallization annealing at a temperature of 800-900°C, and th...

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Abstract

The invention discloses low-noise feature oriented silicon steel which comprises a silicon steel base plate and an insulating coating, wherein the silicon steel base plate is coated with the insulating costing. In addition, the tension range of the insulating coating ranges from 6 MPa to 8 MPa. The content of Cu in the silicon steel base plate satisfies the inequation that 0.1%<=Cu<=0.5%, the content of S in the silicon steel base plate satisfies the inequation that 0.01%<=S<=0.05%, and the atomic ratio of Cu/S satisfies the inequation that 5<=Cu/S<=10. The invention further discloses a manufacturing method for the low-noise feature oriented silicon steel. The method sequentially includes the steps of firstly, smelting and casting to form a plate blank, secondly, heating, thirdly, normalization, fourthly, cold rolling, fifthly, decarbonization annealing, sixthly, finished product annealing, and seventhly, thermal drawing annealing, wherein the surface of the silicon steel base plate is coated with the insulating costing, and the coating quantity is adjusted so that the tension range of the insulating coating can range from 6 MPa to 8 MPa. The low-noise feature oriented silicon steel is small in magnetostriction, vibration generated by an iron core made of the silicon steel is small, and therefore the overall noise level of a transformer is reduced.

Description

technical field [0001] The invention relates to a steel material and a manufacturing method thereof, in particular to an electrical steel and a manufacturing method thereof. Background technique [0002] During excitation, the process of dimensional change of oriented silicon steel finished plate with magnetization is called magnetostriction, which is one of the main sources of transformer noise. As people's demand for energy increases and they become more sensitive to noise, users have stricter requirements on the performance of transformers, especially the noise performance of transformers. At present, transformer manufacturers, steel manufacturers, universities and research institutions all over the world have invested a lot of energy and financial resources to carry out research on the correlation between the noise performance of transformers and different influencing factors. [0003] The mechanism of magnetostriction is the change and rotation of the number of 90° mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C21D8/12
Inventor 吴美洪李国保杨勇杰赵自鹏吉亚明孙焕德沈侃毅凌晨黄杰
Owner BAOSHAN IRON & STEEL CO LTD
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