Continuous casting method of special welded broom casting with excellent internal quality

摘要

The present invention relates to a continuous casting method of a bloom used for special welding wires such as CO ₂ welding, MIG welding, and MAG welding. In providing.;The present invention for achieving the above object by weight, C: 0.026-0.074%, Si: 0.7-0.9%, Mn: 1.4-1.6%, P: 0.020% or less, S: 0.020% or less, Ti: 1.6-2.1 %, Ni: 0.007% or less, and the balance, the special weld rod molten steel made of Fe and other unavoidable impurity elements, the tundish superheat is maintained to maintain the temperature range of 20-25 ℃, the molten steel The amount of water used during the second cooling of the cast slab, injected into the mold, is in the range of 0.16-0.18 l / kg, and the reduction of the pressed slab in the slab is in the range of 2-2.5 mm, while the total continuous casting speed The technical gist of the continuous casting method for the special welded broom slabs having an excellent internal quality in the range of 0.65-0.75 m / min.