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Manufacturing process of ultra-thin oriented silicon steel strip

A technology of oriented silicon steel and manufacturing process, which is applied in the field of preparation of silicon steel thin strips, can solve problems such as poor texture orientation, large cold rolling deformation, and difficult product rate, so as to reduce equipment load, facilitate cold rolling deformation, and reduce The effect of production costs

Active Publication Date: 2015-08-12
SUZHOU JUCI FUNCTIONAL MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The invention provides a manufacturing process for ultra-thin oriented silicon steel strips, which uses ordinary oriented silicon steel as the steel strip raw material, and prepares 0.02 mm thick ultra-thin oriented silicon steel thin strips through a secondary cold rolling process to solve the above-mentioned deformation caused by cold rolling. The problem of low yield due to difficulty in rolling due to too large size, and the problem of poor magnetic properties due to poor orientation of favorable texture after rolling

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  • Manufacturing process of ultra-thin oriented silicon steel strip

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Embodiment 1

[0033] A manufacturing process of an ultra-thin oriented silicon steel strip described in this embodiment comprises the following steps:

[0034] (1) The first cold rolling: use 0.3mm thick ordinary oriented silicon steel as the raw material of the steel strip, and the cutting width is 200mm. At room temperature, the first cold rolling is carried out, and the rolling deformation rate is 88%. 3 to 7 passes, and the cooling liquid known in the art is used in the cold rolling process;

[0035] (2) Intermediate annealing: Continuous intermediate annealing is carried out under a hydrogen protective atmosphere, the annealing temperature is 750°C, and the annealing speed is 2 m / min to form a recrystallized structure;

[0036] (3) The second cold rolling: at room temperature, under 40% deformation rate, carry out the second cold rolling, the cold rolling pass is 3 to 7 passes, and the final rolling thickness is 0.02mm;

[0037] (4) Recrystallization annealing: Under the hydrogen-nitr...

Embodiment 2

[0041] A manufacturing process of an ultra-thin oriented silicon steel strip described in this embodiment comprises the following steps:

[0042] (1) The first cold rolling: use 0.2mm thick ordinary oriented silicon steel as the raw material of the steel strip, and the cutting width is 200mm. At room temperature, the first cold rolling is carried out, and the rolling deformation rate is 50%. 3 to 7 passes, and the cooling liquid known in the art is used in the cold rolling process;

[0043] (2) Intermediate annealing: Continuous intermediate annealing is carried out under a hydrogen protective atmosphere, the annealing temperature is 1150°C, and the annealing speed is 20 m / min to form a recrystallized structure;

[0044] (3) The second cold rolling: at room temperature, under 80% deformation rate, carry out the second cold rolling, the cold rolling pass is 3~7 passes, and the final rolling thickness is 0.02mm;

[0045] (4) Recrystallization annealing: Under hydrogen-nitrogen ...

Embodiment 3

[0049] A manufacturing process of an ultra-thin oriented silicon steel strip described in this embodiment comprises the following steps:

[0050] (1) The first cold rolling: using 0.25mm thick ordinary oriented silicon steel as the steel strip raw material, the cutting width is 200mm, at room temperature, the first cold rolling is carried out, the rolling deformation rate is 80%, the cold rolling pass 3 to 7 passes, and the cooling liquid known in the art is used in the cold rolling process;

[0051] (2) Intermediate annealing: Under the hydrogen-nitrogen protective atmosphere, continuous intermediate annealing is carried out, the annealing temperature is 950°C, and the annealing speed is 11 m / min to form a recrystallized structure;

[0052] (3) The second cold rolling: at room temperature, under 60% deformation rate, carry out the second cold rolling, the cold rolling pass is 3-7 passes, and the final rolling thickness is 0.02mm;

[0053] (4) Recrystallization annealing: Und...

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Abstract

The invention discloses a manufacturing processing of an ultra-thin oriented silicon steel strip. The manufacturing process comprises the following steps: (1) first cold rolling: at room temperature, cold rolling a steel strip raw material for the first time; (2) intermediate annealing: in a reducing atmosphere, carrying out intermediate annealing at 750-1150 DEG C; (3) second cold rolling: at room temperature, cold rolling for the second time; wherein the final rolling thickness if 0.02mm; (4) recrystallization annealing: in a reducing atmosphere, carrying out recrystallization annealing at the temperature of 750-1150 DEG C; and (5) coating: continuously applying insulating coatings to obtain the ultra-thin oriented silicon steel strip. The manufacturing processing of the ultra-thin oriented silicon steel strip has the advantages of low production difficulty, low equipment load and high production efficiency and can be put into batch production easily; and meanwhile, the ultra-thin oriented silicon steel strip has excellent magnetic property and can be put into practical application favorably.

Description

technical field [0001] The invention relates to the preparation of silicon steel thin strips, in particular to a manufacturing process of ultra-thin oriented silicon steel thin strips. Background technique [0002] Oriented silicon steel has a Goss orientation texture in which the grains tend to be aligned in the direction of easy magnetization, and a soft magnetic material with coarse secondary recrystallized grains. Oriented silicon steel has the characteristics of high magnetic induction and low iron loss. Its manufacturing process is complicated. It is a high-end product in the steel industry. It is mainly used to make various transformer cores and stator cores of large generators. One of the most important functional materials for development. [0003] The thickness of ordinary grain-oriented silicon steel is generally greater than 0.2mm, and it is mainly used to make transformer cores that work at 50Hz power frequency. The thickness of oriented silicon steel strip is...

Claims

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Application Information

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IPC IPC(8): C21D8/12
Inventor 桂福生
Owner SUZHOU JUCI FUNCTIONAL MATERIAL CO LTD
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