高密度脉冲电流对Fe-B共晶合金熔体过冷度的影响  

Effects of High-density Electric Current Pulse on the Undercooling of Fe-B Eutectic Alloy Melting

作　　者：马腾 郝维新[1] 孙晓思 张俊婷[1] 耿桂宏 MA Teng;HAO Weixin;SUN Xiaosi;ZHANG Junting;GENG Guihong(School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;School of Applied Science, Taiyuan University of Sci~nc~ and Technology, Taiyuan 030024, China;School of Materials Science and Engineering, North Minzu Uniwrsity, Yinehuan 750000, China)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024 [2]太原科技大学应用科学学院,山西太原030024

出　　处：《铸造技术》2018年第6期1157-1160,共4页Foundry Technology

基　　金：国家自然科学基金资助项目(51561001;51574171;51641406);山西省自然科学基金项目(201601D011012;2015011002)

摘　　要：采用熔融玻璃净化加循环过热相结合的深过冷技术及高密度脉冲电流作用于金属熔体的方法,研究了Fe-B共晶合金深过冷条件下及脉冲电流作用下的凝固组织。通过DSC方法分析了高密度脉冲电流对Fe-B共晶合金熔体过冷度的影响。结果表明,高密度脉冲电流作用下的凝固组织与深过冷条件下的凝固组织形貌类似,且两种实验条件下获得的过冷度基本相同,证明了脉冲电流可以对金属熔体实现深过冷。The solidification microstructure of Fe-B eutectic alloy under high undercooling and high-density electric current pulse （ECP） was investigated with the technique of molten glass slag purification combined with cyclical superheating and the ECP treatment. The effects of high-density ECP on the undercooling of Fe-B eutectic alloy melt were analyzed by the DSC method. The results show that the solidification microstructure of Fe-B eutectic alloy under ECP is similar to that obtained by the high undercooling technique. The undercooling obtain under two experimental conditions are basically the same, proving that the high undercooling of the metallic melting could be realized by the ECP.

关 键 词：高密度脉冲电流 深过冷凝固技术 凝固组织 过冷度 

分 类 号：TG244[金属学及工艺—铸造] TG113