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Numerical simulation method for crystal growth of Inconel 625 alloy during multi-layer multi-channel laser cladding

A laser cladding, multi-layer and multi-channel technology, used in CAD numerical modeling, instrumentation, informatics, etc.

Active Publication Date: 2020-07-03
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the simulation of grain growth in the laser cladding process of Inconel 625 alloy is mainly single-pass cladding simulation, and there are few studies on multi-layer and multi-pass simulation. Therefore, a multi-layer and multi-pass laser cladding of Inconel 625 alloy The numerical simulation method of crystal growth is particularly important in the process

Method used

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  • Numerical simulation method for crystal growth of Inconel 625 alloy during multi-layer multi-channel laser cladding
  • Numerical simulation method for crystal growth of Inconel 625 alloy during multi-layer multi-channel laser cladding
  • Numerical simulation method for crystal growth of Inconel 625 alloy during multi-layer multi-channel laser cladding

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Embodiment 1

[0083] The present invention relates to a crystal growth numerical simulation method in the process of multi-layer and multi-pass laser cladding of Inconel 625 alloy, such as figure 1 As shown, the specific steps are as follows:

[0084] Step 1: Define the shape of the first molten pool in the first layer;

[0085] Step 2: Establish dendrite nucleation and growth models in the first molten pool of the first layer;

[0086] Step 3: Establish the solute distribution and diffusion model in the first melt pool of the first layer;

[0087] Step 4: Define the shape of the second molten pool in the first layer;

[0088] Step 5: Establish dendrite nucleation and growth models in the second molten pool of the first layer;

[0089] Step 6: Establish the solute distribution and diffusion model in the second melt pool of the first layer;

[0090] Step 7: Define the shape of the first molten pool in the second layer;

[0091] Step 8: Establish a dendrite nucleation and growth model in...

Embodiment 2

[0149] The present invention relates to a crystal growth numerical simulation method in the process of multi-layer and multi-pass laser cladding of Inconel 625 alloy, such as figure 1 As shown, the specific steps are as follows:

[0150] Step 1: Define the shape of the first molten pool in the first layer;

[0151] Step 2: Establish dendrite nucleation and growth models in the first molten pool of the first layer;

[0152] Step 3: Establish the solute distribution and diffusion model in the first melt pool of the first layer;

[0153] Step 4: Define the shape of the second molten pool in the first layer;

[0154] Step 5: Establish dendrite nucleation and growth models in the second molten pool of the first layer;

[0155] Step 6: Establish the solute distribution and diffusion model in the second melt pool of the first layer;

[0156] Step 7: Define the shape of the first molten pool in the second layer;

[0157] Step 8: Establish a dendrite nucleation and growth model in...

Embodiment 3

[0215] According to the crystal growth numerical simulation method in a kind of Inconel 625 alloy multi-layer multi-pass laser cladding process of the present invention, the simulation result of dendrite growth in the first laser cladding layer of the second layer of Inconel 625 alloy can be calculated, such as Figure 8 shown.

[0216] Figure 8 is the growth morphology of dendrites in the first cladding layer of the second layer when the solidification time is 0.74s, 0.85s, and 0.95s respectively. It can be seen from the figure that the crystal grains in the molten pool are coarse columnar crystals, which is caused by the overheating of the liquid metal due to the fact that the heat in the molten pool is not conducive to dissipation.

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Abstract

The invention discloses a numerical simulation method for crystal growth of Inconel 625 alloy during multi-layer multi-channel laser cladding. The method comprises the following specific steps: defining the shape of a first molten pool of a first layer, and establishing a dendrite nucleation and growth model; establishing a solute distribution and diffusion model; sequentially establishing crystalgrowth models for a second molten pool of the first layer, a first molten pool of a second layer and a second molten pool of the second layer; and finally, writing a computer program, inputting thermophysical parameters of the Inconel 625 alloy and various laser cladding process parameters, importing the computer program into simulation calculation software, and performing calculation to obtain asimulation result. Compared with experimental research, the model disclosed in the invention is more time-saving, labor-saving and resource-saving, can simulate dendrite growth conditions under different laser cladding process parameters, and provides reference for selection of an actual laser cladding process.

Description

technical field [0001] The invention belongs to the technical field of numerical simulation of laser cladding of metal materials, and relates to a numerical simulation method of crystal growth in the multilayer and multi-pass laser cladding process of Inconel 625 alloy. Background technique [0002] Inconel 625 alloy powder has good wettability, high temperature self-lubrication and moderate price, so it is very suitable as a laser cladding material. Laser cladding Inconel 625 alloy on the surface of the substrate can not only effectively improve the surface properties of the substrate material, but also has small thermal deformation and is easy to automate production. The laser cladding process is a high-temperature, dynamic, and complex metallurgical process. It is difficult to observe and study the entire solidification process of laser cladding in real time by using traditional experimental methods. It plays a decisive role in the final mechanical properties of the clad...

Claims

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Application Information

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IPC IPC(8): G16C60/00G06F30/20G06F111/10
CPCG16C60/00Y02P10/25
Inventor 张敏郭宇飞黄超郭钊张立胜王刚
Owner XIAN UNIV OF TECH
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