FeCuNbSiB纳米晶合金软磁性能的热处理工艺调控研究  

Heat-Treatment Optimizing Study on Soft Magnetic Properties of FeCuNbSiB Nanocrystalline Alloys

作　　者：董帮少[1,3] 周少雄[1,2] 支起铮 邢彦兴[2] 杨富尧 乔光尧 韩钰 DONG Bangshao;ZHOU Shaoxiong;ZHI Qizheng;XING Yanxing;YANG Fuyao;QIAO Guangyao;HAN Yu(Advanced Technology&Materials Co.,Ltd.,Beijing 100081,China;Jiangsu JITRI Advanced Energy&Materials Research Institute Co.,Ltd.,Changzhou 213032,China;School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China;Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102209,China)

机构地区：[1]安泰科技股份有限公司,北京100081 [2]江苏集萃安泰创明先进能源材料研究院有限公司,江苏常州213032 [3]东北大学材料与冶金学院,辽宁沈阳110004 [4]全球能源互联网研究院有限公司,北京102209

出　　处：《中国电力》2022年第2期200-208,共9页Electric Power

基　　金：国家重点研发计划资助项目(2017YFB0903903);国家自然科学基金资助项目(51971093)。

摘　　要：为满足大容量高频变压器对大尺寸纳米晶铁芯低损耗需求,探索了50 mm高纳米晶铁芯的热处理工艺,研究了2种典型纳米晶合金Fe_(73.5)Cu_(1)Nb_(3)Si_(15.5)B_(7)和Fe_(73.5)Cu_(1)Nb_(3)Si_(13.5)B_(9)(简称B_(7)和B_(9))的热处理温度(330~600℃)对铁芯静态和动态磁性能的影响规律。结果表明:B_(7)和B_(9)合金在420℃退火已开始纳米晶化,要远早于通常认为的500℃。2种合金分别在550、580℃退火具有最低的铁芯损耗;而分别在500、550℃退火具有最优的静态磁性能,即最高的磁导率和最低的矫顽力。经施加横向磁场退火后,B_(7)合金的损耗进一步降低,Pcm(0.5T/20k)达到7.3W/kg,为目前报道的最低铁芯损耗。根据系列数据建立了铁芯损耗分形公式为Pcm=0.5f^(1.42)Bm^(2.27),预测的准确性得到了实验结果的验证。This job was focused on the annealing technique of large-size nanocrystalline core with height of 50 mm,to meet the low core loss requirement of large-size nanocrystalline core used in large-capacity high-frequency transformer.Two typical nanocrystalline alloys,Fe_(73.5)Cu_(1)Nb_(3)Si_(15.5)B_(7) and Fe_(73.5)Cu_(1)Nb_(3)Si_(13.5)B_(9) ribbons(hereinafter referred to as B_(7) and B_(9))with the width of 50 mm,were selected to investigate the influence of annealing temperatures(330~600℃)on their soft magnetic properties and core losses.The experimental results were demonstrated that B_(7) and B_(9) alloys probably started to crystallize as early as annealed at 420℃,which is much lower temperature than the widely-held at 500℃.The two alloys were obtained the lowest core losses by being annealed at 550℃and 580℃,respectively.However,they showed the highest permeability and the lowest coercivity when annealed at 500℃and 550℃,respectively.The core losses of B_(7) alloy was continued to reduce through by transversal field annealing,and the lowest value of Pcm(0.5T/20k)was 7.3W/kg,which is the lowest as far as we know.According to the measured data,the core losses of nanocrystalline magnetic core can be described by 2σ in fractional method,and has been confirmed by experimental results.

关 键 词：纳米晶合金 损耗 退火温度 大容量高频变压器 分形 

分 类 号：TM433[电气工程—电器] TM271.2[一般工业技术—材料科学与工程]