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Numerical simulation method for metal droplet formation in vacuum arc remelting process

A vacuum consumable arc and numerical simulation technology, applied in CAD numerical modeling, complex mathematical operations, design optimization/simulation, etc., can solve the problems of little production guidance, no research on arc plasma area, and no improvement proposed , to achieve the effect of saving experimental cost

Pending Publication Date: 2022-02-08
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the research methods at home and abroad have the following problems: (1) There is no systematic research on the temperature field and electromagnetic field in the arc plasma region; (2) The process parameters such as current and voltage, the droplet formation rate, and the temperature field of the molten pool have not been established. There is no suggestion for improvement, and it has little effect on actual production guidance

Method used

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  • Numerical simulation method for metal droplet formation in vacuum arc remelting process
  • Numerical simulation method for metal droplet formation in vacuum arc remelting process
  • Numerical simulation method for metal droplet formation in vacuum arc remelting process

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Embodiment Construction

[0065] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0066] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

[0067] as the picture shows, figure 1 Shows the formation and dripping process of metal droplets, figure 2 It is the process in ...

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Abstract

The invention discloses a numerical simulation method for metal droplet formation in a vacuum arc remelting process, and can realize numerical simulation of an electromagnetic field and a temperature field of an arc plasma zone in a vacuum arc remelting (VAR) process, and a droplet formation process, and explore a relationship between a melting voltage and a metal droplet formation rate. The method comprises the following steps: (1) establishing a correlation mathematical model for calculating an electromagnetic field and fluid dynamics; (2) performing mesh generation on the geometric model; (3) inputting related material attributes; (4) setting related boundary conditions; (5) setting a calculation method and initializing calculation conditions; (6) starting iterative computation, and tracking the flowing of a metal liquid phase in a whole computational domain; (7) calculating current density, magnetic induction intensity, Lorentz force, Joule's heat, and the like; (8) calculating required mass, momentum, energy transmission, and the like; (9) judging a convergence condition, entering a next time step if the convergence condition is met, and otherwise entering a next cycle if the convergence condition is not met, in order to obtain a simulation result in the end.

Description

technical field [0001] The invention relates to the technical field of metal forming, in particular to a numerical simulation method for the formation of metal droplets in a vacuum consumable arc melting process. Background technique [0002] Vacuum consumable arc melting (VAR) is currently the main method for producing titanium alloy ingots. The macro-segregation produced during the melting process cannot be removed during machining, which has an important impact on the quality of production components. It needs to be processed during the melting process. Control defects such as macro-segregation. During the smelting process, the heat transfer in the arc plasma zone, the electromagnetic field, and the droplet dripping of the consumable electrode have an important influence on the smelting process. The energy in the arc zone is related to the droplet speed of the metal droplet and the superheat of the molten pool. Through Affect the molten pool morphology and solidification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/11G06F111/10
CPCG06F30/20G06F17/11G06F2111/10
Inventor 韩静静李军李金富
Owner SHANGHAI JIAO TONG UNIV
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