被覆溶接棒の偏心が溶着に及ぼす影響

抄録

By means of eccentrically covered electrode of ilmenite type and cellulose type coating which has a definite outer diameter and various eccentricities relating to the core wire of a given diameter, the fusion penetration phenomena of stringer bead made on base metal plate in the flat position welding and fire cracker welding were investigated. Furthermore up-slope welding in the flat position were investigated under variously inclined base plate.
The results obtained are summarized as follows:
(1) Flat position welding; a) The shape of penetration becomes Central Penetration Type when the coating thickness is thinner at front side of the electrode travelling and comparatively low arc voltage in the flat position.
(2) Fire cracker welding; a) When the thicker coating thickness are facing to the base plate, the arc is blown up so that the sound weld can't be made easily. When to some extent the arc is directed to the base plate the appearance of weld bead becomes smoother.
(3) Up-slope welding; a) The most favourable inclination of the base plate for practical use occurs at θ = γ, θ being the angle of arc jet, γ the inclination angle of base plate. b) The base plate of large inclination may be successfully welded with electrode of large eccentricity, even when a satisfactory welding can't be achieved by electrode of small eccentricity.