中厚板边裂缺陷的分析与研究  

Analysis on Surface Edge Crack Defect of Medium and Heavy Plate

作　　者：刘志勇[1] 王丽云[1] 秦坤[1] 臧淼[1] 尹绍江[1] 

机构地区：[1]河北钢铁集团唐钢公司

出　　处：《宽厚板》2013年第3期38-40,共3页Wide and Heavy Plate

摘　　要：针对热轧中厚板出现的边裂缺陷,研究了其形成原因和控制方法。结果表明,钢中[A1]、[N]控制不当,生成的[A1N]析出造成晶界脆性,连铸机二冷水冷却不均,结晶器振动偏摆量过大是边裂产生的主要原因。通过控制钢中[A1]、[N]的含量、合理降低连铸机二冷水量和优化结晶器参数等措施,减少了边裂缺陷的发生。For the edge crack defect formed during hot roiling of medium and heavy plate, the article studies the formation causes and appropriate control methods of the defect. The results show that improper control of[ A1 ] and[ N] in the steel and precipitation of [ A1N] are the major causes of grain boundary brittleness, while uneven secondary cooling and excessive mould oscillation deflection are the major causes of edge crack. By taking measures of controlling the content of[ A1 ] and[ N], reducing the secondary water flow of the caster and optimizing mould parameters, edge crack defects have been reduced.

关 键 词：边裂[A1N]析出 结晶器 

分 类 号：TG335.5[金属学及工艺—金属压力加工]