On the Carbon Dioxide-Sekiguchi's Filler Wire-Arc Welding Process (Report 12)

Experiments and Consideration on Elvation of Dew Point of Supplied Gas

Abstract

Carbon dio ide and oxygen, each of which is compressed and charged into two separate cylinder added intentionally enough free water (1 litre), were prepared. Dew points of flowing gases from these cylinders were continuously measured by a photoelectric tube type dew-pointmeter. It was recognized that the relations between dew point of flowing gas and pressure of residual gas in each cylinder are the same as the cases of carbon dioxide out of the specification of JIS and an ordinary oxygen reported previously. And these relations are discussed. The results of calculation about these relations agreed with the results of measurement of actual gases.
From the results of the calculation, it was deduced that a elevation of temperature of a cylinder, an increment of pressure of flowing gas considerably and a drop of temperature of flowing gas slightly elevate a dew point of flowing gas.
Hydrogen content of weld deposited by the carbon dioxide-Sekiguchi's filler wire-arc welding, i. e., CO₂-O₂ arc welding using carbon dioxide and oxygen in two separate cylinders with free water increases as the pressure in the cylinder decreases and temperature of supplied gas increases.