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Production method of high-efficiency electrical steel

A production method and technology for electrical steel, applied in the field of electrical steel production, can solve the problems of insignificant magnetic induction effect of performance improvement, and achieve the effects of reducing iron loss, improving magnetic induction performance, and improving stamping efficiency

Pending Publication Date: 2020-11-27
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of improving the magnetic induction on the performance of medium and low grade products is not obvious

Method used

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  • Production method of high-efficiency electrical steel
  • Production method of high-efficiency electrical steel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The chemical composition of high-efficiency electrical steel is: C: 0.002%, Si: 0.80%, Mn: 0.22%, P: 0.011%, S: 0.003%, Als: 0.22%, N: 0.0013%, the rest are iron and inevitable impurity elements.

[0018] The production method of high-efficiency electrical steel includes the following steps:

[0019] 1) Smelting and continuous casting: adopt converter smelting, RH vacuum refining treatment, control the composition of molten steel according to the above requirements, and cast into 230mm thick slab;

[0020] 2) The hot-rolled slab is rolled at a temperature of 1130°C, rough-rolled to a thickness of 38mm, and then rolled in a finishing mill. The finishing rolling temperature is 980℃, the final rolling temperature is 880℃, and the coiling temperature is 720℃;

[0021] 3) Cold-rolled to 0.16mm after pickling;

[0022] 4) Continuous annealing at 870°C × 1min (continuous annealing at 870°C, 1 minute in the furnace) after cold rolling.

[0023] Among them, after the continu...

Embodiment 2

[0029] The chemical composition of high-efficiency electrical steel is: C: 0.002%, Si: 0.60%, Mn: 0.25%, P: 0.013%, S: 0.004%, Als: 0.25%, N: 0.0014%, the rest are iron and inevitable impurity elements.

[0030] The production method of high-efficiency electrical steel includes the following steps:

[0031] 1) Smelting and continuous casting: adopt converter smelting, RH vacuum refining treatment, control the composition of molten steel according to the above requirements, and cast into 230mm thick slab;

[0032] 2) The hot-rolled slab is rolled at a temperature of 1130°C, rough-rolled to a thickness of 38mm, and then rolled in a finishing mill. The finishing rolling temperature is 990℃, the final rolling temperature is 870℃, and the coiling temperature is 730℃;

[0033] 3) Cold-rolled to 0.21mm after pickling;

[0034] 4) Continuous annealing at 850℃×1min after cold rolling.

[0035] Among them, after the continuous annealing of the cold-rolled steel strip, the surface of...

Embodiment 3

[0040] The chemical composition of high-efficiency electrical steel is: C: 0.002%, Si: 0.80%, Mn: 0.22%, P: 0.011%, S: 0.003%, Als: 0.22%, N: 0.0013%, the rest are iron and inevitable impurity elements.

[0041] The production method of high-efficiency electrical steel includes the following steps:

[0042] 1) Smelting and continuous casting: adopt converter smelting, RH vacuum refining treatment, control the composition of molten steel according to the above requirements, and cast into 230mm thick slab;

[0043] 2) The hot-rolled slab is rolled at a temperature of 1130°C, rough-rolled to a thickness of 38mm, and then rolled in a finishing mill. The finishing rolling temperature is 980℃, the final rolling temperature is 880℃, and the coiling temperature is 720℃;

[0044] 3) Cold-rolled to 0.11mm after pickling;

[0045] 4) Continuous annealing at 850℃×1min after cold rolling.

[0046] Among them, after the continuous annealing of the cold-rolled steel strip, the surface of...

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Abstract

The invention relates to a production method of high-efficiency electrical steel. The production adopts a multi-layer composite method. After molten steel is smelted to target compositions, the moltensteel is casted into billets by continuous casting. A hot-rolled slab is discharged from a furnace at a temperature of 1030-1200 DEG C, and enters a finishing mill group to be rolled until a thickness is 1.5-3.0 mm and is coiled. A final rolling temperature is controlled at 820-900 DEG C. After being acid-pickled, cold rolling is carried out until a thickness is 0.1-0.4 mm. A finished product isformed by compounding three layers of steel strips. A self-bonding coating is adopted by the annealing intermediate layer of the finished product. A semi-organic coating is adopted by the outer layer.After annealing, the three layers of steel strips are compounded into a coil, and then heated to 100-300 DEG C, and heat preservation and solidification are carried out. The method has the advantagesthat in the case of reducing the amount of alloy added, the iron loss is greatly reduced, and the magnetic induction performance is improved.

Description

technical field [0001] The invention belongs to the field of electrical steel production, in particular to a production method of high-efficiency electrical steel. Background technique [0002] High magnetic induction and low iron loss are the two directions of the development of non-oriented silicon steel. Usually, increasing the magnetic induction will increase the iron loss. At the same time, the processes to improve the performance of both are: 1. Alloying of components: suitable for high grades Products and other means are used to the extreme to further improve the electromagnetic performance. The method is to add trace elements such as tin and antimony in steelmaking to improve the texture of the product, thereby improving the performance of the finished product. This method can only improve the performance to a small extent, but cannot significantly improve the performance of the finished product; 2. Increase the alloy content: This method increases the resistivity o...

Claims

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Application Information

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IPC IPC(8): C21D8/12C22C38/02C22C38/04C22C38/06
CPCC21D8/1222C21D8/1233C21D8/1244C22C38/004C22C38/02C22C38/04C22C38/06
Inventor 张智义姜福健高振宇陈春梅苏春霞李亚东
Owner ANGANG STEEL CO LTD
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