罩退含磷高强IF钢边部色差缺陷成因及对策  

Causes and countermeasures of color shading at the edge of batch annealed high strength P containing IF steel strip

作　　者：刘景佳 李光辉[1] 李雷 张丽琴 LIU Jing-j ia;LI Guang-hui;LI Lei;ZHANG Li-qin(Hunan Valin Lianyuan Iron ＆ Steel Co.,Ltd.,Loudi 417009,China)

机构地区：[1]湖南华菱涟源钢铁有限公司

出　　处：《轧钢》2018年第4期81-83,86,共4页Steel Rolling

摘　　要：针对涟钢罩式炉生产390MPa级含磷高强IF钢冷轧卷时出现边部色差缺陷的问题,应用SEM、EDS等检测手段对缺陷产生原因进行了分析。结果表明：退火过程中钢卷边部Mn元素富集氧化是造成色差缺陷的主要原因。通过优化成分及退火工艺解决了钢卷活性元素富集氧化的问题,使色差缺陷从根本上得到了有效控制。Aimed at the problem of color shading at the edge of the batch annealed high strength P bearing IF steel with 390 MPa produced by Lianyuan Steel,the cause was analyzed by SEM and EDS test.The results showed that the main cause of this color shading was Mn enrichment and oxidization at the edge of coil during batch annealing.This color defect was effectively avoided by chemical composition optimization and annealing process adjustment.

关 键 词：含磷高强IF钢 边部色差 罩式炉退火 富集氧化 化学成分 

分 类 号：TG335[金属学及工艺—金属压力加工]