摘要
采用DIL78全自动金属膨胀仪进行C-Si-Mn系TRIP钢的Q&P超快热处理模拟,利用光学显微镜(OM)、透射电子显微镜(TEM)、电子背散射衍射(EBSD)等实验手段对试样的组织进行观察和分析。实验结果表明:冷速对残余奥氏体含量的变化影响显著,随着冷速的增大,残余奥氏体的含量逐渐减少。经超快速冷却处理的Q&P钢中残余奥氏体主要呈条状和薄膜状两种形态,且不连续地分布在板条马氏体之间。
A thermal simulation of heat treatment process for C-Si-Mn TRIP steel is performed with quenching dilatometer DIL78.By means of optical microscopy(OM),transmission electron microscopy(YEM),and electron back scatter diffraction(EBSD),the microstructure of experimental samples are investigated.The experimental results show that the content of retained austenite is greatly affected by cooling rate and decreased gradually with increasing of the cooling rate.After treatment with ultra-fast cooling process,retained austenite in Q&P steel exist discontinuously between the lath martensites with the main morphologies of lath type and thin film type.
作者
张影
Zhang Ying(Shenyang Promoting Center of Industrial Transformation Upgrading,Shenyang,Liaoning,110083,China)
出处
《辽宁科技学院学报》
2019年第4期1-2,13,共3页
Journal of Liaoning Institute of Science and Technology
