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Control method for online predication of surface crack of continuous casting sheet billet

A surface crack and control method technology, which is applied in the field of steelmaking and continuous casting, can solve problems such as product scrapping, achieve high prediction accuracy, reduce the occurrence of quality defects, and improve the quality of slabs

Inactive Publication Date: 2013-02-27
WISDRI ENG & RES INC LTD
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  • Abstract
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Problems solved by technology

[0007] If there are serious surface cracks in the continuous casting slab, the subsequent steel plate rolling will cause the product to be scrapped; when there are small surface cracks, the cracks need to be repaired before rolling the steel plate

Method used

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  • Control method for online predication of surface crack of continuous casting sheet billet
  • Control method for online predication of surface crack of continuous casting sheet billet
  • Control method for online predication of surface crack of continuous casting sheet billet

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Embodiment Construction

[0036] The following is attached figure 1 and 2 The present invention will be further described with following examples, but the present invention is not limited.

[0037] The present invention will be further described below in conjunction with the examples, but the present invention is not limited.

[0038] refer to figure 1 , in the crystallizer, 2 horizontal rows and 8 vertical rows of thermocouples are buried at even intervals below the molten steel level to form a temperature detection system (ie m=2, n=8), to confirm whether the temperature detection system is working normally, Then proceed as follows:

[0039] 1. Obtain the temperature value recorded by each row thermocouple through the temperature detection system (T 1 , T 2 ·····T 8 );

[0040] 2. Calculate the average value, absolute deviation and standard deviation of each temperature in the same row;

[0041] T ‾ = T ...

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Abstract

The invention relates to a control method for online predication of a surface crack of a continuous casting sheet billet. The online predication of the surface crack is carried out by building a temperature detection system on thermocouples on the wall surface of a crystallizer and comparatively analyzing the temperature change conditions in different positions in the heat transfer direction, so that the predication accuracy is high, the surface crack of the continuous casting sheet billet and the specific location of the surface crack are accurately predicted, and the control method is used for guiding on-site production to reduce the quality defects and improve the quality of the continuous casting sheet billet.

Description

technical field [0001] The invention relates to a control method for online prediction of continuous casting slab surface cracks, belonging to the field of steelmaking and continuous casting. Background technique [0002] In the continuous casting production process, surface defects are the main defects that affect the output of the caster and the quality of the continuous casting slab. If it is light, it must be finished; if it is serious, it will lead to breakout or scrapping of the slab, which will affect the operation rate of the casting machine and the metal yield. The traditional manual detection method has problems such as harsh working environment and low detection efficiency, which cannot meet the detection requirements. [0003] Surface defects originate from the crystallizer, and the reason for cracks is that the stress on the billet shell in the mold exceeds the tensile strength of the high-temperature billet shell. [0004] After the molten steel enters the cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/18
Inventor 幸伟马春武徐永斌徐海伦陈洪智李清忠邵远敬叶理德
Owner WISDRI ENG & RES INC LTD
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