An electromagnetic feeding control method for large-section slab continuous casting

Abstract

The invention relates to an electromagnetic feeding control method in the continuous casting process of a large-section slab. A continuous casting machine is provided with a terminal electromagnetic stirring device at the end, and an electromagnetic heating device is installed upstream of the terminal electromagnetic stirring device; the electromagnetic heating device is located in the corresponding electromagnetic heating area. An alternating magnetic field with a frequency of 350-2500 Hz is formed internally, and the Joule heat generated by the alternating magnetic field in the penetration depth of the slab surface increases the fluidity of the molten metal in the slab at the end of solidification; the end electromagnetic stirring device is used in the corresponding electromagnetic stirring. An alternating magnetic field is applied in the area, and the electromagnetic force generated by the alternating magnetic field drives the molten metal in the slab to flow and feed. The present invention can effectively increase the fluidity of the molten metal in the slab, refine the grain structure, and promote the metal replenishment at the end of solidification. shrinkage, thereby improving the quality of large-section slabs.

Description

technical field [0001] The invention relates to the technical field of continuous casting, in particular to an electromagnetic feeding control method for large-section slab continuous casting. Background technique [0002] Continuous steel casting technology (referred to as continuous casting) is one of the iconic breakthrough technologies in the steel industry, which has had a profound impact on the metallurgical field. Compared with die casting, continuous casting has the advantages of high production efficiency, low energy consumption, good quality stability and high comprehensive metal yield. In the early 21st century, with the increasing demand for large-section billets in industries such as wind power, construction machinery, and rail transit, the quality control technology for large-section billets has been greatly developed. [0003] Large-section billets include round billets, rectangular billets, slabs, special-shaped billets, etc., and are suitable for vertical, ...

AI Technical Summary

Problems solved by technology

For the production of medium and high alloy steels, the solidification process of the slab is more difficult to control, and the solidification and shrinkage of the liquid metal in the central area of ​​the slab is difficult to be supplemented, resulting in defects such as central shrinkage porosity, cracks and segregation

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