液态反应法制备TiC_p增强铸造Fe-Cr-Ni基复合材料  

CAST Fe-Cr-Ni MATRIX COMPOSITE REINFORCED BY TiC_p SYNTHESIZED WITH LIQUID STATE IN SITU PROCESS

作　　者：惠希东[1] 王执福[2] 杨院生[1] 吴欣强[1] 陈熙琛[3] 

机构地区：[1]中国科学院金属研究所,沈阳110015 [2]山东工业大学,济南250061 [3]中国科学院物理研究所,北京100080

出　　处：《金属学报》1998年第10期1115-1120,共6页Acta Metallurgica Sinica

摘　　要：研究了利用液态反应法制备的TiC颗粒（TiCo）增强铸造Fe-Cr-Ni基复合材料的显微结构和力学性能．该复合材料主要由γ基体和均匀分布的尺寸为1-5μm的球状或多面体状TiCp组成γ／TiCp界面洁净，两相靠近界面的区域内均存在高密度位错（Ti十C）加入量（质量分数）为3％-6％时复合材料的常温和高温拉伸性能比基体合金明显提高，其拉伸断口在800℃时仍能保持韧性断裂特征.The microstructure and mechanical properties of cast Fe-Cr-Ni matrix composite reinforced by TiCp synthesized with liquid state in site process have beed studied. Thecomposite is composed of γ-matrix and spherical or nodular TiC phase which is dispersed inmatrix uniformly with sizes of 1 -5μm. The interface between γ and TiC phase is net andclean. Dislocation with high density edests in matrix and TiC phase close to the interface. Thetensile property of the composites with the addition of 3% - 6% (Ti+C) is improved obviouslycomparing with that of the matrix alloy at ambient and high temperatures. The fracture surfaceof the composite with the addition of 6% (Ti+C) is of ductile feature at high temperature.

关 键 词：液态反应法 铸造 Fe-Cr-Ni基 复合材料 碳化钛 

分 类 号：TB333[一般工业技术—材料科学与工程]