Online forecasting method for internal crack defect of casting blank

Abstract

An online forecasting method for an internal crack defect of a casting blank belongs to the field of metal casting and comprises a network composed of a computer of L3, a computer of L2 and a computer of L1 and data transmission among the computers, wherein on the basis of the existing computer of L2 or the same control level, a model computer is arranged to obtain the internal stress strain information of the casting blank by real-time online analog computation of cooling and solidifying process of the casting blank, and then forecasts the internal crack defect of the casting blank in real time according to the variation tendency of the strain; then the quality information of the casting blank in the production process is timely transmitted to the cutting computer of L1 which is used for optimizing and controlling the cutting process of the casting blank with the defect; the quality control accuracy of a product and the product percent of pass are increased, the percent of pass and the commercial grade of the product are increased, and the whole economic benefit of an enterprise is further increased. Therefore, the online forecasting method for the internal crack defect of the casting blank can be widely applied to optimizing / control field of the cutting process of the casting blank during the production of slab continuous casting.

Description

technical field [0001] The invention belongs to the field of metal casting, and in particular relates to an online prediction / control method for the internal quality defect of casting slab in the continuous casting production process. Background technique [0002] In the continuous casting process, the cast slab will be deformed by various external forces. When the slab passes through the bending section, it will be subjected to the bending stress; when the slab passes through the correction section, it will be subjected to the correction stress. ;Under the action of the static pressure of the molten steel, the slab will appear bulging deformation. Under the action of these external forces, the continuous casting slab will produce a certain strain, and if the accumulated strain exceeds the critical strain, internal cracks (referred to as internal cracks) will appear. [0003] Internal cracking is a common defect in the quality of casting slabs. Once formed, it will have a g...

AI Technical Summary

Problems solved by technology

Severe slab internal cracking may lead to strip delamination or even strip breakage during hot rolling

[0004] Usually, once the internal defects of the slab are formed, they always exist, and it is difficult to eliminate them in the subsequent processing

However, although strain is closely related to slab cracking defects, strain itself is difficult to detect

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