本钢780MPa级冷轧DP钢组织性能研究  

Research on Microstructure and Property of 780MPa Cold Rolled DP Steel of Benxi Iron & Steel Co.

作　　者：霍刚[1] 韩会全[2] 刘彦春[2] 王国栋[2] 

机构地区：[1]本钢浦项冷轧薄板有限责任公司,辽宁本溪117021 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《轧钢》2008年第2期20-22,共3页Steel Rolling

摘　　要：介绍了本钢浦项连续退火机组试制780MPa级DP钢的工艺流程,并测试了试验钢的组织及性能。结果表明:通过连续退火工艺,试验钢获得了铁素体+马氏体的双相细晶组织;Ti通过细晶强化和沉淀强化,提高了试验钢的强度;试验钢拉伸曲线出现明显屈服现象与Ti的碳氮化物和快冷冷却速度不足有关。The process of 780MPa cold rolled DP steel, piloted in continuous annealing line of Benxi Iron Steel Co. ,was introduced. The microstructure and property of tested steels were measured. The results showed that microstructure was composed of ferrite and martensite with fine grain. Ti contributed to strength through refining grain and precipitation strengthening mechanism. Discontinuous yield appearance during tensile testing was correlated with Ti（C,N） and carbide precipitation due to lower rapid cooling rate.

关 键 词：冷轧 DP钢 连续退火 组织性能 

分 类 号：TG335.12[金属学及工艺—金属压力加工]