冷轧双相钢中残余奥氏体稳定性的研究  

Study on the stability of retained austenite in cold rolled dual-phase steel

作　　者：王卫卫[1] 刘浏[1] 李光瀛[1] WANG Wei-wei;LIU Liu;LI Guang-ying(Metallurgical Technology Institute,Central Iron&Steel Research Institute,Beijing 100081,China)

机构地区：[1]钢铁研究总院冶金工艺研究所,北京100081

出　　处：《轧钢》2019年第2期31-34,42,共5页Steel Rolling

基　　金：国家重点研发计划资助项目(2017YFB0304000)

摘　　要：研究了不同退火温度和变形条件对DP780钢残余奥氏体含量、尺寸、稳定性的影响。结果表明,通过优化连续退火工艺参数,可以获得5%～7%稳定的残余奥氏体。随着变形量的增加,90%的残余奥氏体发生了TRIP效应,不仅提高了DP780钢的强塑性,也改善了其成形性能。The effects of different annealing temperature and deformation conditions on the content,size and stability of retained austenite of DP780 steel were studied.The results show that 5%—7%retained austenite can be obtained by optimizing the parameters of continuous annealing process.With the increase of deformation,the TRIP effect has occurred in 90%retained austenite,which not only improves the strength and plasticity,but also improves formability.

关 键 词：DP780钢 连续退火 变形条件 残余奥氏体 稳定性 TRIP效应 

分 类 号：TG335.12[金属学及工艺—金属压力加工] TG142.1[一般工业技术—材料科学与工程]