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Liu Haiyun
Li Zhuoxin
Shi Yaowu
College of Material Science
and Engineering,
Beijing University of Technology,
Beijing 100022, China |
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EXPERIMENTAL
STUDY ON METAL
TRANSFER OF
CELLULOSE ELECTRODE IN
VERTICAL
DOWN WELDING*
Abstract: A high-speed photographic method is mainly used to analyze metal transfer of a cellulose covered electrode in the vertical down welding. The experimental results show that fine droplets spraying transfer and globular transfer are the dominant transfer characteristic. The large droplet spatter, especially the upwards spatter, is a particular phenomenon. It is found that the combination action of gas blow force, surface tension, gravitational force and electromagnetic force lead to globular transfer. Gravitational force and electromagnetic force, which hasten big droplet spatter, should not be neglected.
Key words:
Metal transfer Cellulose electrode Globular transfer Vertical-down welding |