Abstract
A greater part of arc atmosphere is formed by covering materials of electrodes, and it gives noticeable influences upon the properties of deposited metal.
The authors studied the components of arc atmosphere and their effects upon the deposited metal by means of specially designed equipments, using a number of electrodes covered with different cellulose percentages. As the standard type electrode, illuminate type coated electrodes were used, their cellulose contents being 0, 4, 8, 13, 20 and 25 percents by weight.
The results of analysis reveal that the arc atomosphere as generated in closed vessed is composed of CO, CO2, H2, O2 and H2O. Quantitative ratio between these components markedly varies with the increase of cellulose percentage, and, in spite of excess oxygen, it approaches to the equilibrium constant of water gas reaction.
Increase of cellulose percentage also results in more siliceous as well ass glassy and porous slags, while C, Mn, Si and S in deposited metal were found to be little affected by the cellulose coating.
