Prediction method for dendritic crystal growth in static molten steel based on parallel computing

Abstract

The invention relates to the technical field of metallurgy continuous casting, and provides a prediction method for dendritic crystal growth in static molten steel based on parallel computing. The method comprises the following steps: collecting physical property parameters of to-be-studied steel and proportion data of each component; calculating a control equation of a phase field and a solute field according to the collected physical property parameter data and a phase field method model: writing multi-thread program codes based on parallel calculation, distributing a phase field variable and a concentration calculation process of an i-th node to an i-th thread, and setting a boundary condition and a control condition; enabling the n threads to execute the multi-thread program codes based on parallel computing at the same time, and enabling the i-th thread to output the phase field variable and concentration of the i-th node to an (n + 1)-th thread; and enabling the (n + 1)-th threadto convert the phase field variables and concentrations of the n nodes into an image form to obtain the growth process of dendrites in the static molten steel. According to the method, the growth process of the dendritic crystal in the static molten steel can be reproduced, and the dendritic crystal growth prediction accuracy and calculation efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of metallurgical continuous casting, in particular to a method for predicting dendrite growth in static molten steel based on parallel computing. Background technique [0002] The continuous casting production process of steel is a process in which the molten steel is gradually solidified and formed under the action of cooling. When the molten steel flows through the crystallizer and cooled in the cooling zone, the molten steel solidifies from a liquid phase to a solid phase. The starting point of solidification is the crystal nucleus. After the crystal nucleus in molten steel is formed, it first grows in a spherical shape, but this spherical growth will soon become unstable, and eventually several preferential growth directions will be formed along the dominant growth direction. The crystal grains are composed of Spherical growth transforms into dendritic growth, which eventually grows into dendrites. Duri...

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Problems solved by technology

The existing method of predicting dendrite growth in static molten steel uses serial calculations for the divided calculation domains, and executes one instruction at a time. The calculation process becomes time-consuming and inefficient, which is a waste of computing resources.

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