| 摘要 |
PURPOSE:To provide a titled flux which flows less in inclined position welding and has good pock mark resistance by forming the flux of coarse grains having the specific compsn. contg. SiO2, MnO, MgO and F and contains substantially no TiO2. CONSTITUTION:This fused flux for submerged arc welding contains, by wt%, the following compsn. in which the content of particles having >=1,410mu particle size is adjusted to <=30wt% and the content of particles having <=297mu particle size is adjusted to <=20wt%: The compsn. is incorporated therein with 38- 47% SiO2, 26-35% MnO, 14-20% MgO and 2.4-4.5% F with 0.6-0.9 MnO/ SiO2 ratio and 4-7% MgO/F ratio and is incorporated therein with substantially no TiO2. |
