| 摘要 |
PURPOSE:To stabilize an arc and to reduce spatters, by compounding fine particulate Fe-Mn, Fe-Si in a coating flux of a low hydrogen covered electrode thereby changing the droplet transfer in arc welding to spray transfer. CONSTITUTION:A flux of the compsn. consisting essentially of 1-25% SiO2, 0.5-20% TiO2, 12-60% carbonate such as CaCO3, MgCO3 or the like and 1- 25% fluoride such as CaF2, and contg. 1 or 2 kinds of 1-18% atomized Fe- Mn and 3-23% atomized Fe-Si of which >=55% has <=60 mesh grain sizes and <=45% iron powder is used as a coating material for a low hydrogen covered electrode. The electrode has good arc stability in the welding operation, produces less spatters per length of the electrode and forms excellent welding beads. |
