JOURNAL OF THE JAPAN WELDING SOCIETY
Online ISSN : 1883-7204
Print ISSN : 0021-4787
ISSN-L : 0021-4787
Considerations About the Forming of the Pear-Shaped Bead
Yukio MoriIsao Masumoto
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1979 Volume 48 Issue 12 Pages 1041-1047

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Abstract

There is often a crack at the center of the welding bead which was welded at a high deposition rate or with a deep penetration method, that is, submerged arc welding or CO2 arc welding method etc..
When the groove angle is small or welding conditions are inadequate, cracks are found in the first bead of I, V and K etc. shaped grooves. It has been well known that this crack has a close connection with the so called "pear-shaped bead."
In this report, the relations among the welding conditions, groove angles and the shape of bead were studied. The values of the factors of bead shape were decided by the welding conditions and groove angles.
The values of P/W and Wm/W became the larger, the pear shaped bead more formed, where P: depth of bead, W: width of bead surface and Wm: max. width in bead.

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