Preparation method of oriented high silicon electrical steel

A high-silicon electrical steel and orientation technology, applied in the field of metallurgy, can solve problems such as low efficiency and high energy consumption, and achieve the effects of increasing strength, reducing plastic toughness, and avoiding low efficiency of heating furnaces

Active Publication Date: 2014-04-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, whether it is MnS, AlN or other grain-oriented high-silicon steel schemes based on second-phase particles as inhibitors, they must face the conflict between the fine control of the inhibitor behavior and the fine control of the forming process, which increases the magnetic resistance of the steel

Method used

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  • Preparation method of oriented high silicon electrical steel
  • Preparation method of oriented high silicon electrical steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] It is smelted according to the set composition and cast into a slab at 1400~1600°C, and its composition contains C 0.05%, Si 4.0%, Mn 1.0%, Als 0.20%, N 0.01%, S 0.02%, P 0.10% by weight percentage, The balance is Fe;

[0033] Heat the billet to 1000°C for soaking treatment, holding time for 5 minutes; then perform hot rolling, the starting temperature is 900°C, the final rolling temperature is 750°C, and the hot rolling reduction rate is 50%, to obtain a hot-rolled steel plate;

[0034] The hot-rolled steel plate is pickled to remove the surface oxide layer, and then the rolling method with intermediate annealing is adopted. The first rolling temperature is room temperature, and the reduction rate is 95%. The second rolling temperature is room temperature, and the reduction rate is 95%. The rate is 50%; the hot-rolled steel plate is processed to 0.10 mm to obtain a thin steel plate; intermediate annealing is carried out between the first and second rolling, the anneali...

Embodiment 2

[0038] It is smelted according to the set composition and cast into a slab at 1400~1600°C. The composition contains C 0.06%, Si 6.55%, Mn 0.01%, Als 0.006%, N 0.008%, S 0.06%, P 0.008% by weight, The balance is Fe;

[0039] Heating the cast slab to 1200°C for soaking treatment, holding time for 600 minutes; then hot rolling, the starting temperature is 1180°C, the final rolling temperature is 1000°C, the hot rolling reduction rate is 90%, and the hot rolled steel plate is obtained;

[0040] The hot-rolled steel plate is pickled to remove the surface oxide layer, and then three rolling methods including intermediate annealing are adopted. The first two rolling temperatures are 400°C and 200°C, and the reduction rates are 40% and 95%, respectively. The rolling temperature is 150°C, the reduction rate is 50%, and the hot-rolled steel plate is processed to 0.10mm to obtain a thin steel plate; intermediate annealing is performed between two adjacent rollings, the annealing temperat...

Embodiment 3

[0044] It is smelted according to the set composition and cast into a slab at 1400~1600°C. The composition contains 0.30% C, 7.0% Si, 0.05% Mn, 0.05% Als, 0.001% N, 0.006% S, and 0.006% P by weight. The balance is Fe;

[0045] Heating the billet to 1100°C for soaking, holding time for 300 minutes; then hot rolling, the starting temperature is 1000°C, the final rolling temperature is 800°C, the hot rolling reduction rate is 95%, and the hot rolled steel plate is obtained;

[0046] The hot-rolled steel plate is pickled to remove the surface oxide layer, and then the double rolling method with intermediate annealing is adopted. The first rolling temperature is 300°C, the reduction rate is 40%, and the second rolling temperature is 300°C. , the reduction rate is 92%; the hot-rolled steel plate is processed to 0.20 mm to obtain a thin steel plate; intermediate annealing is carried out between the first and second rolling, the annealing temperature is 900 ° C, and the time is 4 minu...

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Abstract

The invention discloses a preparation method of oriented high silicon electrical steel, and belongs to the technical field of metallurgy. The method comprises the following steps: (1) smelting and casting to form a casting blank according to the set ingredients, wherein the blank comprises the following ingredients in percentage by weight: 0.05-0.30% of C, 4.0-7.0% of Si, 0.01-1.0% of Mn, 0-0.02% of Als, 0-0.50% of Sn, 0-0.50% of Sb, 0-0.50% of Cu, 0-0.10% of Mo and 0-0.50% of Ni; (2) carrying out soaking on a plate blank, and then carrying out hot rolling, so as to obtain a hot-rolled steel plate, wherein the reduction rate is 50-99%; (3) machining the hot-rolled steel plate into 0.10-0.50mm by adopting a rolling method containing intermediate annealing for twice or more, so as to obtain a thin steel plate; and (4) decarburizing and annealing the thin steel plate, and carrying out secondary recrystallization annealing. By adopting the preparation method disclosed by the invention, complete secondary recrystallization can be achieved under the condition of not using kinds of second-phase particles such as AlN, MnS and Cu2S as inhibitors, so as to obtain the oriented high silicon electrical steel. Thus, the heating temperature of the plate blank is reduced, and the production flow is simplified.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method of oriented high-silicon electrical steel. Background technique [0002] Electrical steel is the main core material of power electronic equipment. As the silicon content increases, the magnetic permeability of electrical steel increases, and the electrical conductivity and magnetostriction coefficient decrease. Therefore, high-silicon electrical steel with a silicon content of 4.0~7.0% by weight Compared with ordinary electrical steel (Si<3.5%), it has the advantages of low iron loss and low noise; however, limited by the intrinsic hard and brittle nature of high-silicon electrical steel, only Japan's JFE Steel Company has achieved mass production by chemical vapor deposition (Japan Publication numbers are patents JP63227717A, JP63069915A). In recent years, centering on non-oriented high-silicon electrical steel, Northeastern University and...

Claims

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Application Information

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IPC IPC(8): C22C38/60C22C38/06C22C38/08C22C38/12C22C38/16C21D8/12
CPCC22C38/60C21D8/1255C21D8/1272C22C38/06C22C38/08C22C38/12C22C38/16
Inventor 沙玉辉左良柳金龙姚勇创张芳
Owner NORTHEASTERN UNIV
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