过流冷却后Fe-0.77C-1.40B合金微观组织研究  

Research on Microstructure and Properties of Fe-0.77C-1.40B Alloy with Inclined Plate Cooling

作　　者：李飞 蔡云秀[2] 黎振华[3,4] 赵国荣 何正员 LI Fei1, CAI Yunxiu2, LI Zhenhua3,4, ZHAO Guorong1, HE Zhengyuan3,4(1. City College, Kunming University of Science and Technology, Kunming 650093, China; 2. Yunnan Vocational College of Mechanical and Electrical Technology, Kunming 650000, China; 3. School of Materials Science and Engineering, Kunming University of Science and Technology, Ktmming 650093, China; 4. National-Local Engineering Laboratory for Technology of Metallic Advanced Solidification Forming and Equipment, Kunming 650093, Chin)

机构地区：[1]昆明理工大学城市学院,云南昆明650093 [2]云南机电职业技术学院,云南昆明650000 [3]昆明理工大学材料科学与工程学院,云南昆明650093 [4]金属先进凝固成形及装备技术国家地方联合工程实验室,云南昆明650093

出　　处：《铸造技术》2018年第4期751-754,759,共5页Foundry Technology

基　　金：国家自然科学基金资助项目(50701020)

摘　　要：借助OM、XRD、SEM试验,研究了Fe-0.77C-1.40B合金的铸态微观组织以及不同倾斜板长度过流冷却后Fe-0.77C-1.40B合金微观组织的变化规律。结果表明,Fe-0.77C-1.40B合金的凝固组织主要由α-Fe、P和共晶硼碳化物(Fe_(23)(C,B)_6)组成,共晶硼碳化物呈菊花状分布;过流冷却后Fe-0.77C-1.40B合金微观组织先共晶相在倾斜板中流动时细化、球化,倾斜板长度为600~800 mm时,Fe-0.77C-1.40B合金初生奥氏体颗粒在一定的面积上颗粒数最多,平均横截面直径最小,形状因子最大,初生奥氏体晶粒球化、细化程度最好。The microstructure evolution of as-cast Fe-0.77C-1.40B alloy with inclined plate cooling were studied with OM,XRD and SEM.The results show that the solidification microstructure of Fe-0.77C-1.40B alloy is mainly composed ofα-Fe,Fe3C and eutectic boron carbide（Fe3（C,B）,Fe23（C,B）6）.The eutectic boron carbide present chrysanthemum-like distribution.The Fe-0.77C-1.40B alloy primary austenite grain size,the average cross-sectional diameter is the smallest from 600 to 800 mm,and shape factor is the largest.The primary austenite grain spherification and refinement degree is the best.

关 键 词：Fe-C-B合金 微观组织 过流冷却 

分 类 号：TG113[金属学及工艺—物理冶金]