Formation Mechanism and Control of Triangular Area Crack of Continuous Casting Slab

The type and formation of the triangular area cracks of the continuous casting slab were analyzed though macro examination and scanning the cracks by SEM.The measures to reduce the triangular area cracks were put forward including steel content,secondary cooling water,drive pressure,soft reduction and support segments.Results show that the sulfur content of steel and support segment was the main influencing factors of the triangular area cracks.After adopting the improvement measures,the rate and level of the triangular area cracks are obviously descended.