连铸板坯三角区裂纹成因分析及改进措施  

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

作　　者：修立策[1] 

机构地区：[1]济南钢铁集团总公司第三炼钢厂,山东济南250101

出　　处：《中国冶金》2007年第5期57-60,共4页China Metallurgy

摘　　要：通过对铸坯的低倍检验和三角区裂纹部位的电镜扫描,分析了连铸板坯三角区裂纹的类型和成因;提出了从钢水成分、二冷配水、驱动压力、轻压下、支撑段等方面的改进措施。其结果表明,钢中硫和铸坯的支撑段是影响三角区裂纹的主要因素。具体措施的实施,使三角区裂纹的发生率和级别大幅度下降。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.

关 键 词：连铸板坯 三角区裂纹 支撑段 硫 低倍检验 

分 类 号：TF777.1[冶金工程—钢铁冶金]