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| Research and practice on corner scarring defect of continuous casting slabs |
| XU Li-ping1，WANG Hong-feng2 |
（1. China Iron and Steel research institute group， Beijing 100081，China
2. Baosteel Meishan Iron and SteelCo.， Ltd.， Nanjing 210039， Jiangsu， China） |
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Abstract In this paper， the formation procedure and mechanism of scarring defects at the corners of slabs produced by Baosteel Meishan Steelmaking plant were systematically investigated. It preliminarily found that the scarring defects formed at the mold meniscus through analysis to macroscopic morphology with field tracking. And it was ascribed to the overflow of solidification furrow at the corner of shell caused by the rupture， overflow and condensation of the primary shell of the meniscus. According to the analysis， the following measures are suggested to diminish the defects： the sinterability of mold powder should be reduced. While the deviation of crystallizer vibration as well as the cooling homogeneity should also be strictly controlled. Thus， the quality of the mold copper plate and the functional accuracy of the equipment related to the forces of the primary shell in the mold must be guaranteed. The corner scarring defects of slabs then will be diminished
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Received: 04 September 2018
Published: 28 February 2019
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2019, Vol. 38 
