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Non-oriented electrical steel used for stereoscopic transformer with rolled iron core and production method thereof

A technology of grain-oriented electrical steel and three-dimensional wound iron core, applied in the field of steelmaking, can solve problems such as the adverse effects of the promotion of three-dimensional wound iron core transformers, and achieve the effects of reducing iron loss, improving recrystallization texture, and improving magnetic induction

Active Publication Date: 2014-11-12
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrical steel is the main raw material of transformers. At present, three-dimensional wound core transformers are mainly produced with 0.23mm, 0.27mm, and 0.30mm oriented electrical steels. The grades include 090-120. The price of oriented electrical steels is generally 7000 higher than that of non-oriented electrical steels. -8000 yuan / ton, so it caused huge pressure on the transformer factory, and also caused adverse effects on the promotion of three-dimensional wound core transformers

Method used

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  • Non-oriented electrical steel used for stereoscopic transformer with rolled iron core and production method thereof

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Embodiment 1

[0045] Use molten iron with a titanium content of 0.15%, and the temperature of the molten iron is 1320°C for desulfurization treatment. The S of the molten iron is 0.0030%, and 1 ton of low-sulfur scrap steel is added. The composition of the end point of the converter is 0.04% for C, 0.0040% for S, and 0.023% for P. , O activity 500ppm, tapping temperature 1650 ℃. RH refining adopts decarburization mode. First, low-carbon ferrosilicon is used to adjust silicon, then aluminum particles are used to adjust aluminum, and finally micro-carbon ferromanganese is adjusted to manganese. The end temperature of RH refining is 1580 ° C, and the entire refining cycle is 45 minutes. The continuous casting adopts full-protection casting, uses carbon-free silicon steel heat preservation agent, uses automatic control of mold liquid level, and uses special mold slag for silicon steel; adopts electromagnetic stirring, the target casting speed is 1.10m / min, and the secondary cooling water adopts ...

Embodiment 2

[0049] Use molten iron with a titanium content of 0.14%, the temperature of the molten iron is 1340°C, and carry out desulfurization treatment. The S of the molten iron is 0.0024%, and 1.2 tons of low-sulfur scrap steel is added. The composition of the end point of the converter is 0.045% for C, 0.0042% for S, and 0.025% for P. , O activity 550ppm, tapping temperature 1630 ℃. RH refining adopts decarburization mode. First, low-carbon ferrosilicon is used to adjust silicon, then aluminum particles are used to adjust aluminum, and finally micro-carbon ferromanganese is adjusted to manganese. The end temperature of RH refining is 1570 ° C, and the entire refining cycle is 40 minutes. The continuous casting adopts full-protection casting, uses carbon-free silicon steel heat preservation agent, uses automatic control of mold liquid level, and uses special mold slag for silicon steel; adopts electromagnetic stirring, the target casting speed is 1.0m / min, and the secondary cooling wat...

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Abstract

The invention provides non-oriented electrical steel used for a stereoscopic transformer with a rolled iron core. The non-oriented electrical steel comprises, by weight, 0.001-0.003% of carbon, 0.6-1.5% of silicon, 0.3-1.0% of aluminum, 0.2-0.8% of manganese, less than or equal to 0.1% of phosphorus, less than or equal to 0.003% of sulfur, less than or equal to 0.003% of nitrogen, less than or equal to 0.003% of titanium, less than or equal to 0.003% of niobium, less than or equal to 0.003% of vanadium, and balance iron and unavoidable impurities. The invention further provides a production method of the non-oriented electrical steel used for the stereoscopic transformer with the rolled iron core. The production method includes the production steps of converter smelting, RH refining, continuous casting, hot rolling, normalizing, acid tandem rolling, continuous annealing, coating, high-temperature batch-type furnace annealing and the like. The non-oriented electrical steel used for the stereoscopic transformer with the rolled iron core has the advantages of being high in magnetic induction and low in iron loss.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a non-oriented electrical steel for a three-dimensional wound core transformer and a production method thereof. Background technique [0002] With the needs of national energy conservation and emission reduction, reducing the loss of transformers and improving the efficiency of power supply and distribution systems are issues of concern to all countries in the world. The three-dimensional wound core transformer has the characteristics of light weight, small volume, small no-load loss and low noise. Electrical steel is the main raw material of transformers. At present, three-dimensional wound core transformers are mainly produced with 0.23mm, 0.27mm, and 0.30mm oriented electrical steels. The grades include 090-120. The price of oriented electrical steels is generally 7000 higher than that of non-oriented electrical steels. -8000 yuan / ton, thus causing huge pressure on transf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/12C22C38/14C21D8/12
Inventor 匡元辉余威陈凌峰胡志远罗文彬张保磊王付兴侍爱臣
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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