Method for calculating stress of forced convection on AlN dendrites in molten steel solidification process in field of metallurgy

Abstract

The invention provides a method for calculating the stress of forced convection on AlN dendrites in the molten steel solidification process in the field of metallurgy, and relates to the field of metallurgy. The method comprises the following steps: firstly collecting steel grade components and solidification conditions; secondly calculating heat transfer and mass transfer in the solidification process, growth of interface cells in the solidification process and nucleation and growth of AlN in the solidification process, and further establishing an AlN precipitation model in Fe-C-Al-N quaternary alloy solidification; according to the continuous casting process conditions such as casting temperature, solute components and cooling rate, predicting the precipitation rule through the established AlN precipitation model, displaying the precipitation position, size, shape and size of AlN in a data imaging mode through data analysis and visual processing software, and quantifying the AlN precipitation number. According to the prediction method for the precipitation situation of the AlN inclusions in the molten steel solidification process, the theoretical guidance is provided for optimizing the solidification technology, controlling the size of the AlN inclusions in steel and improving the quality of a casting blank.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for calculating the force exerted on AlN dendrites by forced convection during the solidification process of molten steel in the metallurgical field. Background technique [0002] The iron and steel industry is an important pillar basic industry of the national economy. During the solidification process of molten steel, as the temperature decreases, the surface layer of the slab begins to nucleate and grow to form columnar crystals. With the growth of columnar crystals, the solute enrichment at the front of the solid-liquid interface is serious. AlN inclusions of different sizes have different effects on the properties of steel. For this reason, the prediction of inclusion precipitation during the solidification process of molten steel is of great significance for controlling the cracks of the slab and improving the quality of the slab. Du...

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Problems solved by technology

However, this method is cumbersome to solve, has a large amount of calculation, and has poor numerical stability. In addition, when dealing with dendrite curved edges, wall functions are needed, which increases the solution error.

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