电炉CSP流程微Ti低碳高强汽车用钢板的开发研究  

Development of Ti-microalloyed Low Carbon Steel for Automobile Frames by EAF-CSP Process

作　　者：赵征志[1] 康永林[1] 于浩[1] 毛新平[2] 陈贵江[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]广州珠江钢铁有限责任公司,广东广州510730

出　　处：《钢铁》2005年第10期72-75,共4页Iron and Steel

基　　金：国家自然科学基金资助项目(50334010)

摘　　要：利用光学显微镜、透射电子显微镜(TEM)和X射线能谱研究了微量Ti对电炉CSP流程生产低碳高强度汽车用钢板的组织性能的影响.试验结果表明:钢板显微组织细小,铁素体平均晶粒尺寸为6.0～8.0 μm.大量细小的TiN,Ti(C,N)第二相粒子在铁素体晶界、晶内沉淀析出,其粒子的平均晶粒尺寸在10～30 nm之间.这些纳米级沉淀粒子对钢的组织细化和强化起到重要作用.The influence of microalloying element Ti on microstructure and mechanical properties of high strength low carbon automobile steel plates produced by EAF-CSP process were investigated by means of optical electron microscope, JEM-2000FX electron microscope and X-ray Energy Dispersive Spectroscope （XEDS）. The experiment re- suits showed that the matrix consists of very fine ferrite grains, whose average size is 6.0-8.0 μm . A large number of fine second particles were observed in ferrite matrix. The precipitates were TiN and Ti（C,N） mainly. The average particle size was 10-30 nm. Remarkable strengthening and grain refinement can be caused by these nano-particles.

关 键 词：CSP 力学性能 显微组织 析出 强化 

分 类 号：U465[一般工业技术—材料科学与工程]