摘要：Plasma arc welding (PAW) is an important technique in the manufacturing industry. To improve the welding efficiency, the special keyhole mode has attracted considerable attention because it has the potential to achieve full penetration without a groove. However, rigorous process conditions are required to maintain a stable keyhole mode. For better and more widespread application in industry, a multiphase and multi-physical model is established to reveal the complicated electro-magneto-Thermo-hydro-mechanical phenomena and gas-liquid-solid interactions in the keyhole PAW process. Arc backward reflection and deviation of the heating center occur because of the relative movement in the system, and molten liquid metal is pushed backward and upward to form a salient metal layer at the rear. The maximum height reaches 1.45 mm. Outflow phenomenon occurs through the open keyhole, and the outflow temperature and velocity are approximately 6000 K and 60 m/s by the calculation, respectively. The predicted weld pool and keyhole basically coincide with measured results. This study provides a comprehensive understanding of the multiphase and multi-physical interactions in the PAW process, which may help improve the associated techniques. ? 2022 Elsevier Ltd. All rights reserved.

ISSN号：2214-157X

卷、期、页：卷41,

发表日期：2023-01-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：EI（工程索引）

发表期刊名称：Case Studies in Thermal Engineering

参与作者：武传松

通讯作者：云泽,苏辰,周祥

第一作者：李岩

论文类型：期刊论文

论文概要：李岩,云泽,苏辰,周祥,武传松，Multiphase and multi-physical simulation of open keyhole plasma arc welding，Case Studies in Thermal Engineering，2023，卷41,

论文题目：Multiphase and multi-physical simulation of open keyhole plasma arc welding