| 摘要 |
PURPOSE:To obtain a titled flux where the flux consumption rate is low and the peeling property of the slag and the stability of the arc are high, by containing a specific composition of SiO2, TiO2, Al2O3, ZrO2, CaF2 and MgO, and blending Fe and etc. as required. CONSTITUTION:A flux for submerged arc welding which contains 15-37wt% SiO2, 25-44wt% TiO2, 5-28wt% Al2O3, <=21wt% ZrO2, <=10wt% CaF2, and <=12wt% MgO and has <=0.5 ratio of ZrO2/TiO2 is obtained by the sintering method, and consists of <=65% rough particles of >=20 meshes and <=35% fine particles of <=48 meshes in respect to particles. Further, <=10% BaO is blended in the flux to suppress the generation of pockmarks. Physical properties of a weld metal are improved and the flux consumption rate is reduced by blending <=40% iron powder and/or <=8% metallic powder other than iron powder. |
