Design and optimization of a rapid coaxial gas mixing device for welding shielding gases

被引：0
|
作者：
Li F. [1 ]
Cheng S. [1 ]
Wu S. [1 ]
Cheng F. [1 ,2 ]
机构：
[1] School of Material Science and Engineering, Tianjin University, Tianjin
[2] Tianjin Key Laboratory of Advanced Joining Technology, Tianjin
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2023年 / 44卷 / 08期
关键词：
ANSYS FLUENT software; austenitic stainless steel; binary shielding gas; coaxial gas mixing device; ferrite content; material transport model; standard k-ε turbulence model; welding method with variable N[!sub]2[!/sub] content;
D O I：
10.11990/jheu.202106075
中图分类号：
学科分类号：
摘要：
A coaxial gas mixing device is designed to mix binary shielding gas rapidly and uniformly. The standard k-ε turbulence model, material transport model of ANSYS FLUENT, and variable N2 content welding method are used to study the influence of the structural size of the coaxial gas mixing device on the gas mixing effect and its control effect on the ferrite content of the weld. Research results show that reducing the diameter of air ducts shortens mixing time and improves the uniformity of the gas mixture. The stability of the gas mixture improves with the increase in the length of the coaxial air supply pipe. The content and size of ferrite in the deposited austenitic stainless steel are controlled by using the designed coaxial gas mixing device. This study provides an idea for binary welding shielding gas mixtures, especially for the regulation of stainless steel deposited metal ferrite. © 2023 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1418 / 1425
页数：7
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