Continuous casting crack risk prediction method and application thereof

A technology of risk prediction and continuous casting slabs, applied in geometric CAD, design optimization/simulation, etc., can solve problems that cannot be raised, achieve convenient guidance, intuitive results, and improve porosity
CN110929355AActive Publication Date: 2020-03-27NORTHEASTERN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEASTERN UNIV
Publication Date
2020-03-27

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Abstract

The invention discloses a continuous casting crack risk prediction method and an application thereof, and belongs to the technical field of continuous casting. According to the continuous casting crack risk prediction method, as intermediate cracks are generated in the continuous casting process and surface crack propagation is mainly caused by tensile strain or tensile stress, the tensile strainis taken as a basis for judging middle crack initiation and surface crack propagation, and a crack risk prediction model is established on the basis of a critical crack criterion of high-temperature tensile measurement and a full-flow heat / force coupling model of continuous casting from the meniscus of a crystallizer to the end of an air cooling area. A crack risk prediction model is adopted to analyze the crack risk of the casting blank in the whole continuous casting process and draw a crack risk cloud chart, so that a process strategy is provided for field production to control crack defects, and the quality of the casting blank is improved.
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Description

technical field

[0001] The invention relates to the technical field of continuous casting, in particular to a method for predicting crack risks of continuous casting slabs and its application. Background technique

[0002] Cracks are one of the main quality problems of continuous casting slabs, and cracks account for about 50% of all kinds of defects. The root causes of crack formation are the phase transformation of the slab during continuous casting, the precipitation behavior of carbonitrides at the grain boundaries, and the performance differences between different microstructures. There is a zero plasticity temperature (ZDT) in the high temperature zone, and the material near the ZDT temperature is between the solid phase and the liquid phase, with poor fluidity and low plasticity, and cracks are easily generated in this temperature range; in the low temperature zone of the austenite phase, due to Dynamic recovery and dynamic recrystallization are difficult to occur, a...

Claims

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