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Welding pool microstructure evolution simulation method based on cellular automaton method

A technology of welding molten pool and cellular automation, which is applied in the fields of instrumentation, calculation, and electrical digital data processing, etc., can solve the problems of large amount of calculation and low calculation efficiency of microstructure evolution, and achieve improved welding quality, low cost and long research cycle. short effect

Active Publication Date: 2019-11-22
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for simulating the evolution of the microstructure of the weld pool based on the cellular automata method, which solves the problems of large amount of calculation and low calculation efficiency of the microstructure evolution existing in the prior art

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  • Welding pool microstructure evolution simulation method based on cellular automaton method
  • Welding pool microstructure evolution simulation method based on cellular automaton method
  • Welding pool microstructure evolution simulation method based on cellular automaton method

Examples

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Effect test

Embodiment 1

[0085] A simulation method based on the cellular automata method for the microstructure evolution of the weld pool, such as figure 1 As shown, the specific steps are as follows:

[0086] 1. A method for simulating the evolution of weld pool microstructure based on cellular automata, characterized in that, it is specifically implemented according to the following steps:

[0087] Step 1, simplifying the welding pool solidification condition of the cellular automata method;

[0088] Step 2. Based on the heat transfer theory, construct a transient macroscopic temperature field model during the welding process;

[0089] Step 3. Based on the principle of interpolation, transform the macroscopic welding temperature field into a macroscopic and microcosmic coupling model of the microscopic temperature field required for microstructure evolution;

[0090] Step 4. On the premise of obtaining the microscopic temperature field, construct a nucleation and growth model of dendrites under ...

Embodiment 2

[0152] A simulation method based on the cellular automata method for the microstructure evolution of the weld pool, such as figure 1 As shown, the specific steps are as follows:

[0153] Step 1, simplifying the welding pool solidification condition of the cellular automata method;

[0154] Step 2. Based on the heat transfer theory, construct a transient macroscopic temperature field model during the welding process;

[0155] Step 3. Based on the principle of interpolation, transform the macroscopic welding temperature field into a macroscopic and microcosmic coupling model of the microscopic temperature field required for microstructure evolution;

[0156] Step 4. On the premise of obtaining the microscopic temperature field, construct a nucleation and growth model of dendrites under transient conditions based on grain nucleation and growth;

[0157] Step 5. Calculation and visualization of its results.

[0158] 2. a kind of welding pool microstructure evolution simulation ...

Embodiment 3

[0218] A simulation method based on the cellular automata method for the microstructure evolution of the weld pool, such as figure 1 As shown, the specific steps are as follows:

[0219] 1. A method for simulating the microstructure evolution of the weld pool based on the cellular automata method, specifically implemented according to the following steps:

[0220] Step 1, simplifying the welding pool solidification condition of the cellular automata method;

[0221] Step 2. Based on the heat transfer theory, construct a transient macroscopic temperature field model during the welding process;

[0222] Step 3. Based on the principle of interpolation, transform the macroscopic welding temperature field into a macroscopic and microcosmic coupling model of the microscopic temperature field required for microstructure evolution;

[0223] Step 4. On the premise of obtaining the microscopic temperature field, construct a nucleation and growth model of dendrites under transient cond...

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Abstract

The invention discloses a welding pool microstructure evolution simulation method based on a cellular automaton method. The method comprises the following specific steps: simplifying the solid condition of a welding pool, then establishing a dendritic crystal nucleation and growth model, finally writing a computer program, inputting alloy thermophysical parameters and various welding process parameters, and calculating to obtain a simulation result. According to the invention, the change of a welding temperature field under a transient condition and the growth morphology and solute concentration distribution of dendrites in the solidification process of a molten pool can be simulated, thereby playing a guiding role in practical engineering application.

Description

technical field [0001] The invention belongs to the field of numerical simulation of microstructure evolution during metal solidification, and in particular relates to a method for simulating microstructure evolution of a welding pool based on a cellular automata method. Background technique [0002] As a widely used processing method, welding is distinguished from other processing methods by its distinctive features, the most notable feature of which is the various complex physical and chemical changes that occur under the action of the highly dynamic transient temperature field of welding. Changes determine the type of solidification structure, grain size, etc., and ultimately have a decisive impact on the quality of processing. [0003] In the field of microstructure research, the traditional method is to achieve a quantitative and qualitative understanding of the complex welding process through a large number of experiments, which is often time-consuming and laborious, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张敏黄超郭宇飞张文辉董玉凡李继红
Owner XIAN UNIV OF TECH
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