方坯连铸机铸坯内部缺陷优化改进措施  

Optimization and improvement measures of internal defects in billet of billet caster

作　　者：田银鸽 韩小强[1] 李永锋[1] Tian yinge;Han Xiaoqiang;Li Yongfeng(Jinxi Iron and Steel Group Co.,Ltd.,Tangshan 064300,China)

机构地区：[1]河北津西钢铁集团股份有限公司,河北唐山064300

出　　处：《冶金标准化与质量》2023年第2期33-35,共3页Metallurgical Standardization & Quality

摘　　要：通过对铸坯低倍试样和生产数据详细分析,发现铸坯低倍试样非精炼裂纹比率高于精炼的裂纹比率,同时连铸的结晶器和二冷水的进水温度、二冷水的冷却强度对铸坯内部裂纹也存在很大的影响。根据铸坯内部裂纹产生的机理,制定相应的措施,稳定生产和优化工艺参数,促使铸坯内部裂纹3级以上缺陷降为零。Through the detailed analysis of the low-magnification sample and production data,it is found that the nonrefining crack ratio of the low-magnification sample is higher than the refining crack ratio,at the same time,the influent temperature of mold and secondary cooling water and the cooling intensity of secondary cooling water have great influence on the internal cracks of billet.According to the mechanism of internal cracks in slab,corresponding measures are made to stabilize production and optimize process parameters so as to reduce the internal cracks above 3 grades to zero.

关 键 词：低倍试样 内部裂纹 精炼 冷却强度 

分 类 号：TG115.21[金属学及工艺—物理冶金]