アーク溶接時に発生するスパッタに関する研究（第１報） 溶接母材表面に付着したスパッタの除去力測定

Abstract

This study deals with shielded metal arc welding and CO2 gas shielded arc welding, measuring the force to remove the adhering spatter on the surface of base metal by using different filler metals and by changing the conditions of the surface of base metal. Rolled steel for general structure (SS400) was used as base metal.A high titanium oxide type electrode and a low hydrogen type electrode were used for shielded metal arc welding, a solid wire and a flux-cored wire were used as filler metal for CO2 gas shielded arc welding respectively. In order to examine the relationship between the condition of the surface of base metal and the force to remove spatters, the base metal that the surface was ground by the electric grinder was used for experiments, the one was not ground by an electric grinder, and the another was coated with an anti-spatter compound.Whichever filler metal was used, the spatter adhered to the surface of base metal was located within 100 millimeters from the weld line. In those cases, the force to remove the adhering spatter can be measured mostly below 98 N. The spatter needed more than 98 N to remove was located especially within 20 millimeters from the weld line.No matter when the scale was on base metal or not, the difference of the force to remove the spatter was small. When we used the base metal coated with anti-spatter compound, in some cases we found the spatter on the base metal, and in other cases we didn't. When we found the spatter it was located within 40 millimeters from the weld line and the force to be removed can be measured below 20 N.