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Continuous casting sheet billet internal crack online prediction method

A technique for internal cracks, prediction methods, applied in the field of steelmaking and continuous casting

Active Publication Date: 2014-07-16
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on domestic research on online prediction of internal cracks in continuous casting slabs

Method used

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  • Continuous casting sheet billet internal crack online prediction method
  • Continuous casting sheet billet internal crack online prediction method
  • Continuous casting sheet billet internal crack online prediction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1: Cast Q235 steel with a cross-section of 1600×200mm on a slab continuous caster with a radius of 10m, and predict the internal cracks of the slab online. The whole process is as follows image 3 As shown, the parameter input flow chart in the whole process is as follows figure 2 Shown.

[0079] 1. Model data initialization process:

[0080] First confirm the steel grade Q235, enter the steel grade physical parameters; secondly, read the process parameters and heat flow parameters.

[0081] 2. Real-time dynamic tracking:

[0082] Divide the slab from the meniscus of the mold to the end of the control zone into several slices, dynamically track the life and position information of each slice at different times, and dynamically track the "life" and position information of each slice at different times With the real-time changes of the drawing speed, the temperature of the tundish, and the water volume of each cooling zone, the boundary conditions of the solidification h...

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Abstract

The invention relates to a continuous casting sheet billet internal crack online prediction method which is characterized in that a casting billet is divided into a plurality of slices from a crystallizer meniscus to the tail end of a control area, a slice heat tracking model of two-dimensional solidification heat transfer of each slice is built based on ignoring heat transfer along the withdrawal direction, the casting billet solidification process is dynamically tracked through the slice heat tracking models, all slices are connected together to dynamically describe temperature field distribution of the whole strand, bulging strain generated by the casting billet is computed online in real time through a bulging strain model according to temperature field distribution or solidification parameters of the casting billet, a critical strain value of the casting billet is set and serves as a standard for generating an internal crack, and the casting billet generates the internal crack when the bulging strain exceeds the critical strain value of the casting billet. The internal crack of the sheet billet can be predicted online in real time, so that a lot of detection cost is saved.

Description

Technical field [0001] The invention relates to an online prediction method for internal cracks of a continuous casting slab, belonging to the field of steelmaking and continuous casting. Background technique [0002] As the country vigorously promotes the development of a circular economy, metallurgical enterprises are increasingly demanding energy conservation and consumption reduction. Continuous casting billet hot delivery and hot charging and continuous casting billet continuous rolling technology have obvious characteristics such as low energy consumption, low investment, high yield rate, and short production cycle, so they have become the most active research areas in the field of continuous casting. In the past, the quality of the cast slab produced by the continuous casting machine was mainly evaluated by the quality of the cast slab in the cold state. During the production process, the degree and distribution of the internal cracks of the continuous casting slab need to...

Claims

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Application Information

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IPC IPC(8): B22D11/16B22D11/18
Inventor 幸伟范小刚马春武徐永斌徐海伦陈洪智邵远敬叶理德袁德玉
Owner WISDRI ENG & RES INC LTD