Microstructures and Mechanical Properties of Nb-Ti Bearing Hot-rolled TRIP Steels  

作　　者：Yu CHEN Guoyi TANG Haoyang TIAN Feipeng LI Yu ZHANG Lihui WANG Zhaojun DENG Dexing LUO 

机构地区：[1]Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China [2]Technology Center of Wuhan Iron and Steel Corp., Wuhan 430080, China [3]Processing Research Institute of Dongfeng Motor Corp., Shiyan 442001, China

出　　处：《Journal of Materials Science & Technology》2006年第6期759-762,共4页材料科学技术（英文版）

摘　　要：Nb-Tihot-rolled TRIP-assisted steel with high plasticity and appropriate volume percentage of retained austenite based on fine ferrite grain have been developed in the experiment. The test results showed that niobium tend to exist in solution state in matrix with less precipitation, and niobium-titanium could be precipitated in form of （Nb, Ti）C or （Nb, Ti） （C, N）, which play an important role in increasing yield strength （from 495 MPa to 610 MPa）. Besides, the retained austenite had a positive effect on improving the plasticity by transformation into martensite during tensile deformation.Nb-Tihot-rolled TRIP-assisted steel with high plasticity and appropriate volume percentage of retained austenite based on fine ferrite grain have been developed in the experiment. The test results showed that niobium tend to exist in solution state in matrix with less precipitation, and niobium-titanium could be precipitated in form of （Nb, Ti）C or （Nb, Ti） （C, N）, which play an important role in increasing yield strength （from 495 MPa to 610 MPa）. Besides, the retained austenite had a positive effect on improving the plasticity by transformation into martensite during tensile deformation.

关 键 词：NB-TI HOT-ROLLING TRIP-assisted steel 

分 类 号：TG142.7[一般工业技术—材料科学与工程]