Method for accurately controlling primary recrystallization size of oriented silicon steel

A technology of oriented silicon steel and recrystallization, which is applied in the direction of heat treatment process control, manufacturing tools, heat treatment equipment, etc., and can solve the problem that the control accuracy cannot meet the requirements.

Active Publication Date: 2020-07-17
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0005] Aiming at the defect that the primary recrystallization control accuracy of oriented silicon steel cannot meet the requirements, the present invention proposes a method for accurately controlling the primary recrystallization size of oriented silicon steel, through online real-time detection of the primary recrystallization grain size, to complete the decarburization annealing effect Evaluation; through model control, real-time feedback control of annealing temperature is realized, stable and ideal primary recrystallization is obtained, and finally excellent grain-oriented silicon steel finished products are stably obtained

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  • Method for accurately controlling primary recrystallization size of oriented silicon steel
  • Method for accurately controlling primary recrystallization size of oriented silicon steel
  • Method for accurately controlling primary recrystallization size of oriented silicon steel

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Embodiment Construction

[0035] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Combined process figure 1 , a method for accurately controlling the primary recrystallization size of grain-oriented silicon steel, comprising the following steps:

[0037] S1, select steel coils for processing oriented silicon steel, and cold-roll them;

[0038] S2. After the steel coil is cold-rolled, the initial recrystallization annealing temperature setting model I is established according to the relationship between the initial recrystallization annealing temperature setting and the target grain size of the oriented silicon steel, and the annealing temperature target setting value is calculated;

[0039] The primary recrystallization annealing temperature setting model I is

[0040]

[0041] b1, b2, b3, b4: constants, which need to be fitted to the differences of different steel types;

[0042] Primary rec...

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Abstract

The invention discloses a method for accurately controlling the primary recrystallization grain size of oriented silicon steel. Dynamic adjustment of decarburization annealing process is guided in real time by online detection of the primary recrystallization grain size, so that ideal and stable primary recrystallization grains are obtained stably, conditions are created for perfect high-temperature annealing secondary recrystallization, andthe oriented silicon steel with good performance is obtained stably. According to the method, on-line evaluation on the effect of decarburization annealingprocess is achieved by online rapid detection of the primary recrystallization grain size, so that the dynamic process adjustment scheme is guided; on the basis of grain size detection, on-line real-time adjustment of decarburization annealing temperature is achieved by a grain size adjustment model; by adjustment of the process online and in real time, the primary recrystallization structure with ideal grain size can be stably obtained, and favorable conditions are created for secondary recrystallization of the oriented silicon steel.

Description

technical field [0001] The present invention relates to the technical field of production and processing of oriented silicon steel, and more specifically refers to a method for accurately controlling the primary recrystallization size of oriented silicon steel. Through online detection of the primary recrystallization grain size, real-time guidance and dynamic adjustment of the decarburization annealing process are achieved to achieve ideal, Stable primary recrystallized grains. Background technique [0002] A large number of production practices of grain-oriented silicon steel in low temperature process have shown that in order to obtain stable electromagnetic properties of the finished product, that is, to obtain the ideal secondary recrystallization structure stably, the core is to control the primary recrystallization annealing. [0003] Patents JP02671077B2 and JP9178706A detect the iron loss W of primary recrystallized strip steel on-line 13 / 50 , W 10 / 50 , W 8 / 50 , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D11/00C21D8/12
CPCC21D11/00C21D8/1233C21D8/1272
Inventor 黄望芽李国保杨勇杰凌晨
Owner BAOSHAN IRON & STEEL CO LTD
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