A kind of preparation method of oriented high silicon electrical steel

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

Active Publication Date: 2016-01-20
NORTHEASTERN UNIV LIAONING
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  • 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 plate. Unfavorable inhibitors such as S and N form elements, these elements must be removed by high-temperature purification annealing process, and high-temperature purification annealing is usually carried out in pure hydrogen at 1200 ° C for a long time, which consumes a lot of energy and has low efficiency

Method used

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  • A kind of preparation method of oriented high silicon electrical steel
  • A kind of preparation method of oriented high silicon electrical steel

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Experimental program
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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 C0.05%, Si4.0%, Mn1.0%, Als0.20%, N0.01%, S0.02 by weight percentage %, P0.10%, 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 annealing tem...

Embodiment 2

[0038] It is smelted according to the set composition and cast into a billet at 1400~1600°C, and its composition contains C0.06%, Si6.55%, Mn0.01%, Als0.006%, N0.008%, S0.06 by weight percentage %, P0.008%, 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 anneali...

Embodiment 3

[0044] It is smelted according to the set composition and cast into a billet at 1400~1600°C, and its composition contains C0.30%, Si7.0%, Mn0.05%, Als0.05%, N0.001%, S0.006 by weight percentage %, P0.006%, 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...

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Abstract

A method for preparing oriented high-silicon electrical steel, which belongs to the field of metallurgy technology, is carried out by the following steps: (1) smelting and casting a slab according to a set composition, and the composition contains C? 0.05~0.30%, Si? 4.0~7.0%, Mn? 0.01~1.0%, Als? 0~0.20%, Sn? 0~0.50%, Sb? 0~0.50%, Cu? 0~0.50%, Mo? 0~0.10%, Ni? 0~0.50%; (2) The slab is heat-treated, and then hot-rolled, the reduction ratio is 50-99%, and the hot-rolled steel plate is obtained; (3) Two or more rolling methods including intermediate annealing are adopted, Process the hot-rolled steel plate to 0.10-0.50mm to obtain a thin steel plate; (4) Decarburization annealing and secondary recrystallization annealing are performed on the thin steel plate. The invention does not use AlN, MnS, Cu2S and other second phase particles as inhibitors to achieve perfect secondary recrystallization, thereby obtaining oriented high-silicon electrical steel sheets, reducing the heating temperature of slabs, and simplifying the production process.

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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Patent Type & Authority Patents(China)
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 LIAONING
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