Simulation method for predicting solidification process of vacuum consumable melting cast ingot

Abstract

The invention discloses a simulation method for predicting the solidification process of a vacuum consumable melting cast ingot, and relates to the technical field of vacuum consumable arc melting. The simulation method comprises the following steps: establishing a mathematical model related to an electromagnetic field and a flow field, carrying out mesh generation on a geometric model, adopting an Eulerian-Eulerian method, setting three phases: molten metal, equiaxed dendrites and columnar crystals, and obtaining related material attributes; setting relevant boundary conditions and relevant dynamic grid parameters, and simulating flowing and solidification of molten metal in the vacuum consumable arc melting process and distribution of an electromagnetic field and a solidification structure. According to the method, the rising process of the molten pool and the solidification process of the cast ingot in the vacuum self-consuming arc melting process are simulated, the flowing form of the molten metal in the solidification process is obtained, the capacity of predicting macrosegregation of the cast ingot is achieved, and the method plays an important guiding role in optimizing the vacuum self-consuming arc melting process to obtain the cast ingot with uniform components; and the method is of great significance to actual production.

Description

technical field [0001] The invention relates to the technical field of vacuum consumable arc smelting, in particular to a simulation method for predicting the solidification process of vacuum consumable smelting ingots. Background technique [0002] Vacuum consumable arc melting is mainly used to prepare active metal ingots such as titanium and zirconium, which are used in the production of parts in aerospace, military and other industrial fields. The process of vacuum consumable arc smelting is: the consumable electrode melts under the action of DC arc to form metal droplets and falls into the water-cooled copper crucible, the liquid level of the molten pool in the crucible rises continuously, and the molten metal in the molten pool gradually Solidification eventually forms an ingot. In the remelting process, segregation will occur due to uneven distribution of solute, which will affect the processing performance and service performance of parts or components produced from...

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Problems solved by technology

[0003] At present, scholars at home and abroad mainly use numerical simulation methods to predict the macro-segregation of ingots, and have achieved certain results, but there are still the following problems: no systematic research on vacuum consumable arc melting, lack of prediction of vacuum consumable arc melting The simulation method of ingot macrosegregation does not study the influence of electromagnetic field on macrosegregation

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