| 摘要 |
A sintering type flux for a submerged arc welding is provided to prevent a welding defect by controlling a chemical composition, viscosity and/or granularity for the sintering type flux. A sintering type flux for a submerged arc welding comprises a flux, which includes SiO2 of 12.0 to 20.0wt%, Al2O3 of 18.0 to 27.0wt%, ZrO2 of 6.0 to 12.0wt%, CaO of 6.0 to 12.0 wt%, CaF2 of 7.0 to 16 wt%, MnO of 20.0 to 29.0wt%, a composition including one selected from the group consisting of Na2O, K2O and Li2O of 1.5 to 4.5wt% and Fe remnant/impurities. Particles whose size is 1.00mm or above accounts for 5.0wt% of the flux or less. Particles having a size from 1.00mm to 0.50mm accounts for 20.0 to 50.0wt% of the flux. Particles having a size of 0.50mm or 0.20mm accounts for 40.0 to 75.0wt% of the flux. Particles whose size is 0.20mm or less account for 5.0wt% of the flux or less.
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