Predicting of bead undercut defects in high-speed gas metal arc welding (GMAW)

被引：6

作者：

Xu W.-J. ^{[1
]}

Wu C.-S. ^{[1
]}

Zou D.-G. ^{[1
]}

机构：

[1] Institute for Materials Joining, Shandong University

来源：

Frontiers of Materials Science in China | 2008年 / 2卷 / 4期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

Bead undercut; High-speed GMAW; Weld pool geometry and dimension;

D O I：

10.1007/s11706-008-0065-x

中图分类号：

学科分类号：

摘要：

In the gas metal arc welding (GMAW) process, when the welding speed reaches a certain threshold, there will be an onset of weld bead undercut defects which limit the further increase of the welding speed. Establishing a mathematical model for high-speedGMAWto predict the tendency of bead undercuts is of great significance to prevent such defects. Under the action of various forces, the transferred metal from filler wire to the weld pool, and the geometry and dimension of the pool itself decide if the bead undercut occurs or not. The previous model simplified the pool shape too much. In this paper, based on the actual weld pool geometry and dimension calculated from a numerical model, a hydrostatic model for liquid metal surface is used to study the onset of bead undercut defects in the high-speed welding process and the effects of different welding parameters on the bead undercut tendency. © Higher Education Press and Springer-Verlag GmbH 2008.

引用

页码：402 / 408

页数：6

共 12 条

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