Production method of low temperature and high magnetic induction oriented silicon steel for improving magnetic uniformity in direction of plate width

A technology of high magnetic induction orientation and production method, which is applied in the direction of coating, metal material coating process, solid-state diffusion coating, etc., can solve the problems of uneven magnetic properties of steel coils, improve the magnetic level, solve magnetic unevenness, and improve Overall magnetic effect

Active Publication Date: 2018-12-18
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Aiming at the problems existing in the prior art, the present invention provides a production method of low-temperature high-magnetic-inductive oriented silicon steel that improves the magnetic uniformity in the width direction of the plate, and improves the problem of non-uniform magnetic properties of each part of the steel coil caused by the high-temperature annealing process

Method used

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  • Production method of low temperature and high magnetic induction oriented silicon steel for improving magnetic uniformity in direction of plate width
  • Production method of low temperature and high magnetic induction oriented silicon steel for improving magnetic uniformity in direction of plate width
  • Production method of low temperature and high magnetic induction oriented silicon steel for improving magnetic uniformity in direction of plate width

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1 and comparative example 1 are all produced according to the following steps (nitriding in the decarburization annealing is carried out by different processes):

[0061] 1) The slab is obtained after smelting, vacuum and continuous casting; during the production process, the steel composition is shown in Table 1:

[0062] The chemical composition (wt%) of table 1 slab, balance is Fe

[0063] element

C

Si

mn

S

Cu

als

Cr

N

Embodiment 1 / Comparative Example 1

0.057

2.9

0.08

0.005

0.06

0.0273

0.11

0.0061

[0064] 2) Hot rolling: the heating temperature is 1150°C; the final rolling temperature is 950°C;

[0065] 3) Pickling normalization: adopt conventional two-stage normalization annealing, the temperature of the first stage of normalization is 1100°C, and the temperature of the second stage is 920°C;

[0066] 4) Cold rolling: the cold rolling aging temperature is 220°C, and the thickness ...

Embodiment 2

[0080] Embodiment 2 and comparative example 2 are all produced according to the following steps (nitriding in the decarburization annealing is carried out by different processes):

[0081] 1) The slab is obtained after smelting, vacuum and continuous casting; during the production process, the steel composition is shown in Table 3:

[0082] The chemical composition (wt%) of table 3 billet, balance is Fe

[0083]

[0084] 2) Hot rolling: the heating temperature is 1180°C; the final rolling temperature is 960°C;

[0085] 3) Pickling normalization: adopt conventional two-stage normalization annealing, the temperature of the first stage of normalization is 1100°C, and the temperature of the second stage is 900°C;

[0086] 4) Cold rolling: the cold rolling aging temperature is 214°C, and the thickness of the cold rolled finished product is 0.23mm;

[0087] 5) Continuous annealing and nitriding: according to different processes:

[0088] Example 2: a. During the decarburizatio...

Embodiment 3

[0099] Embodiment 3 and comparative example 3 are all produced according to the following steps (nitriding in the decarburization annealing is carried out by different processes):

[0100] 1) The slab is obtained after smelting, vacuum and continuous casting; during the production process, the steel composition is shown in Table 5:

[0101] The chemical composition (wt%) of table 5 billet, balance is Fe

[0102]

[0103] 2) Hot rolling: the heating temperature is 1200°C; the final rolling temperature is 970°C;

[0104] 3) Pickling normalization: adopt conventional two-stage normalization annealing, the temperature of the first stage of normalization is 1150°C, and the temperature of the second stage is 950°C;

[0105] 4) Cold rolling: the cold rolling aging temperature is 224°C, and the thickness of the cold rolled finished product is 0.20mm;

[0106] 5) Continuous annealing and nitriding: according to different processes:

[0107] Example 3: a. During the decarburizatio...

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Abstract

The invention discloses a production method of low temperature and high magnetic induction oriented silicon steel for improving magnetic uniformity in the direction of the plate width. The productionmethod produces and obtains the low temperature and high magnetic induction oriented silicon steel through seven steps of smelting, hot rolling, pickling normalization, cold rolling, continuous annealing and nitriding, high temperature annealing and stretching leveling annealing. When a steel belt passes through a reduction zone, a primary cooling zone and a nitriding zone of a conveyor belt sequentially after decarbonization and annealing are completed, the angle of small holes of injection holes of a nitriding branch pipe I, a nitriding branch pipe II and a nitriding branch pipe III are adjusted freely and correspondingly towards the steel plate; and the injection mode of nitriding branch pipes under and above the steel belt is designed symmetrically. By adjusting the structure of a nitriding tube in a nitriding annealing section, the production method realizes the differential control over the nitriding amount in the direction of the plate width and a primary grain area, and the problem of magnetic inhomogeneity in the direction of the plate width caused by the uneven temperature of the upper and lower end faces of a circular furnace in a current process is solved.

Description

technical field [0001] The invention relates to a production method of high magnetic induction oriented silicon steel, in particular to a production method of low temperature high magnetic induction oriented silicon steel which improves the magnetic uniformity in the width direction of the plate. Background technique [0002] Oriented silicon steel is an excellent soft magnetic material, which is widely used in power transmission and transformation products such as large transformers, and is used to manufacture iron cores in transformers. It is one of the indispensable raw materials for the development of the power industry. The main technical indicators of the magnetic properties of oriented silicon steel include iron loss and magnetic induction. The iron loss is directly related to the iron core loss when using transformers and other power transmission and transformation products. When the silicon steel sheet is made into the iron core, the steel coil will be divided into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/34C22C38/04C22C38/06C22C38/20C21D8/12C23C8/26
CPCC21D8/1222C21D8/1233C21D8/1255C21D8/1272C22C38/04C22C38/06C22C38/20C22C38/34C23C8/26
Inventor 骆新根郭小龙王若平高洋胡守天杨佳欣申明辉丁哲雷艳李胜金
Owner 武汉钢铁有限公司
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