Low-iron-loss non-oriented silicon steel suitable for winding type machining and production method of low-iron-loss non-oriented silicon steel

A technology of oriented silicon steel and production method, which is applied in the field of rolling steel production, can solve problems such as difficult to meet the use requirements of electrical steel, unfavorable winding processing, poor magnetic properties, etc., achieve excellent elongation, low manufacturing cost, and ensure the effect of electromagnetic properties

Active Publication Date: 2022-02-18
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing non-oriented silicon steel, which has high iron loss, relatively poor magnetic properties, and low elongation, so that it is difficult to meet the use requirements of electrical steel, and it is not conducive to winding processing. It provides a Low iron loss non-oriented silicon steel suitable for winding processing and its production method

Method used

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  • Low-iron-loss non-oriented silicon steel suitable for winding type machining and production method of low-iron-loss non-oriented silicon steel
  • Low-iron-loss non-oriented silicon steel suitable for winding type machining and production method of low-iron-loss non-oriented silicon steel
  • Low-iron-loss non-oriented silicon steel suitable for winding type machining and production method of low-iron-loss non-oriented silicon steel

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Embodiment 1

[0055] A low iron loss non-oriented silicon steel suitable for winding processing in this embodiment, the weight percentage range of its components is as follows: figure 1 A list of chemical composition values.

[0056] The test steel with the above content is subjected to molten iron pretreatment, converter smelting, and vacuum treatment, and then continuously casts into a 230mm slab. During the treatment, the ladle top slag is used to reduce the FeO content to less than 5% to ensure that the CaO / Al in the slag 2 o 3 The ratio is controlled at 1.6.

[0057] Enter the furnace at a temperature of 500°C, heat at 1120°C for 230 minutes, and hot-roll it into a hot-rolled coil with a thickness of 2.5mm; after normalizing at 930°C, cold-roll it to a thickness of 0.35mm to roll a hard coil; 2 and 70%N 2 In the mixed gas, and the oxygen content in the furnace is controlled at 16ppm. After annealing at 930°C×45s, the temperature is lowered in the high temperature section for 30s. In...

Embodiment 2

[0059] A low iron loss non-oriented silicon steel suitable for winding processing in this embodiment, the weight percentage range of its components is as follows: figure 1 A list of chemical composition values.

[0060] The test steel with the above content is subjected to molten iron pretreatment, converter smelting, and vacuum treatment, and then continuously casts into a 230mm slab. During the treatment, the ladle top slag is used to reduce the FeO content to less than 5% to ensure that the CaO / Al in the slag 2 o 3 The ratio is controlled at 1.7.

[0061] Enter the furnace at a temperature of 550°C, heat at 1120°C for 210 minutes, and hot-roll it into a hot-rolled coil with a thickness of 2.5mm; after normalizing at 930°C, cold-roll it to a thickness of 0.35mm to roll a hard coil; 2 and 70%N 2 In the mixed gas, and the oxygen content in the furnace is controlled at 16ppm. After annealing at 930°C×45s, the temperature is lowered in the high temperature section for 35s. In...

Embodiment 3

[0063] A low iron loss non-oriented silicon steel suitable for winding processing in this embodiment, the weight percentage range of its components is as follows: figure 1 A list of chemical composition values.

[0064] The test steel with the above content is subjected to molten iron pretreatment, converter smelting, and vacuum treatment, and then continuously casts into a 230mm slab. During the treatment, the ladle top slag is used to reduce the FeO content to less than 5% to ensure that the CaO / Al in the slag 2 o 3 The ratio is controlled at 1.5.

[0065] Enter the furnace at a temperature of 600°C, heat at 1120°C for 230 minutes, and hot-roll it into a hot-rolled coil with a thickness of 2.5mm; after normalizing at 930°C, cold-roll it to a thickness of 0.35mm to roll a hard coil; 2 and 70%N 2 In the mixed gas, and the oxygen content in the furnace is controlled at 16ppm, after annealing at 930°C×45s, the temperature is lowered in the high temperature section for 30s. In...

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Abstract

The invention discloses low-iron-loss non-oriented silicon steel suitable for winding type machining and a production method of the low-iron-loss non-oriented silicon steel, and belongs to the technical field of silicon steel production. The non-oriented silicon steel comprises the following elements in percentage by mass: 1.5 to 2.5 percent of Si, 0.15 to 1.0 percent of Mn, 0.5 to 1.5 percent of Als and the balance of Fe and inevitable impurities. The production process comprises the steps of molten iron pretreatment, converter smelting, vacuum treatment and continuous casting. Heating and hot rolling; normalizing treatment; cold rolling and annealing; preserving heat and cooling; and coating with an insulating layer. The non-oriented silicon steel with excellent electromagnetic performance and elongation can be produced by optimizing the components and proportion of the non-oriented silicon steel in combination with process operation, so that the winding type processing and use requirements of the electrical steel can be effectively met, and the manufacturing process is short in flow and relatively low in cost.

Description

technical field [0001] The invention belongs to the technical field of steel rolling production, and more specifically relates to a low iron loss non-oriented silicon steel suitable for winding processing and a production method thereof. Background technique [0002] The traditional production method of the motor stator core is a single piece stamped and then welded or riveted into multiple pieces. Because the pieces are not related to each other, there are more or less differences in the material itself or artificially in each material. At the same time Due to the influence of pressure during welding or riveting, problems such as gaps and cracks will occur, which will affect the performance of the motor. In addition, the corners and middle circles are wasted during punching, and the utilization rate of materials is low. The winding stator core processing method only needs to go through the processes of uncoiling, leveling, stamping, winding, welding, and trimming, and the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/12C22C33/04
CPCC22C38/02C22C38/04C22C38/06C22C33/04C21D8/1222C21D8/1233C21D8/1244C21D8/1283
Inventor 夏雪兰裴英豪施立发祁旋胡柯陈明侠占云高徐文祥
Owner MAANSHAN IRON & STEEL CO LTD
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