第36卷第11期 北京科技大学学报 Vol.36 No.11 2014年11月 Journal of University of Science and Technology Beijing Now.2014 Fe-Cu-Nb-Si-B快淬带的组织、磁性及微区力学 性能 包小倩四，张真，高学绪 北京科技大学新金属材料国家重点实验室，北京100083 ☒通信作者，E-mail:bxql18@usth.cdu.cm 摘要采用单辊熔体快淬法制备宽6~8mm、厚30~40μm的Fe3Cu.6Nb2.6Sig.sB,合金薄带.其直流磁性能为：饱和磁感 应强度B.=1.06T,剩磁B,=0.39T,矫顽力H。=3.53A/m,最大磁导率4m=2.43mH/m;交流磁性能为：铁损Pasn= 22.2Wkg,Pa2mu=864W/kg,对应的有效磁导率u.分别为833和1225.场发射高分辨扫描电镜观察发现，不同工艺参数 制备的快淬带因晶化程度不同，对应的断口形貌特点也不同，非晶相和纳米晶复合的合金带断口可见镜面区和雾状区、周期 性褶皱、河流状花样等，而晶化接近完全的合金带呈沿晶断裂.纳米力学探针研究表明，非晶相和纳米晶复合的合金带的微区 硬度和弹性模量低于晶化接近完全的合金带.基于Luborsky法，利用自行设计的装置测量断裂应变，对材料的韧性进行半定 量分析. 关键词软磁材料：铁合金：力学性能：磁性能：显微组织：非晶相：纳米晶 分类号TG132.2·71 Microstructure,magnetic and micromechanical properties of Fe-Cu-Nb-Si-B melt-spun ribbons BAO Xiao-qian,ZHANF Zhen,GAO Xue-xu State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:bxql18@ustb.edu.cn ABSTRACT Fe7s.CuasNbSiss B melt-spun ribbons of 6-8 mm in width and 30-40 um in thickness were produced by using a single roller melt spinning technique machine.The melt-spun ribbons have the direct current (DC)magnetic properties of saturation flux B.=1.06T,remanence B.=0.39T,coercivity H=3.53 A*mand maximum permeability=2.43 mHmand the alterna- ting current magnetic properties of core loss Ps=22.2 W.kg,P=864W.kgand corresponding efficient magnetic permeabilityu=833 and 1225.Field emission high resolution scanning electron microscopy results indicate that the melt-spun ribbons prepared at different technical parameters show different crystallization degrees and fracture morphology characteristics.The fracture surface morphology of the amorphous-nanocrystallized ribbons is composed of a mirror zone,a mist zone,a hackle zone,and a river- pattern zone,while the crystallized ribbons exhibit intergranular embrittlement.The microhardness and elastic modulus of the amor- phous-nanocrystallized ribbons measured with a nano-indenter probe are lower than those of the crystallized ribbons.The fracture tough- ness of the melt-spun ribbons was semi-quantitatively determined by using a self-designed gauge based on the Luborsky method. KEY WORDS soft magnetic materials;iron alloys:mechanical properties:magnetic properties;microstructure:amorphous phases; nanocrystals 1988年Yoshizawa等m首次报道了Fea.,Cu,- 成功应用.它同时具有高磁导率、高饱和磁感、高居 Nb,SiaB,纳米晶软磁合金及其在共模扼流圈中的里温度及低的高频损耗，是变压器铁芯中硅钢的理 收稿日期：201308一10 DOI:10.13374/j.issn1001-053x.2014.11.013:http://jourals.ustb.edu.cn第 36 卷 第 11 期 2014 年 11 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 36 No． 11 Nov． 2014 Fe--Cu--Nb--Si--B 快 淬 带 的 组 织、磁性及微区力学 性能 包小倩，张 真，高学绪 北京科技大学新金属材料国家重点实验室，北京 100083  通信作者，E-mail: bxq118@ ustb． edu． cn 摘 要 采用单辊熔体快淬法制备宽 6 ～ 8 mm、厚 30 ～ 40 μm 的 Fe78. 3 Cu0. 6Nb2. 6 Si9. 5 B9合金薄带． 其直流磁性能为: 饱和磁感 应强度 Bs = 1. 06 T，剩磁 Br = 0. 39 T，矫顽力 Hc = 3. 53 A/m，最大磁导率 μm = 2. 43 mH/m; 交流磁性能为: 铁损P0. 5 T/1 kHz = 22. 2 W/ kg，P0. 2 T/100 kHz = 864 W/ kg，对应的有效磁导率 μe分别为 833 和 1225． 场发射高分辨扫描电镜观察发现，不同工艺参数 制备的快淬带因晶化程度不同，对应的断口形貌特点也不同，非晶相和纳米晶复合的合金带断口可见镜面区和雾状区、周期 性褶皱、河流状花样等，而晶化接近完全的合金带呈沿晶断裂． 纳米力学探针研究表明，非晶相和纳米晶复合的合金带的微区 硬度和弹性模量低于晶化接近完全的合金带． 基于 Luborsky 法，利用自行设计的装置测量断裂应变，对材料的韧性进行半定 量分析． 关键词 软磁材料; 铁合金; 力学性能; 磁性能; 显微组织; 非晶相; 纳米晶 分类号 TG 132. 2 + 71 Microstructure，magnetic and micromechanical properties of Fe--Cu--Nb--Si--B melt-spun ribbons BAO Xiao-qian ，ZHANF Zhen，GAO Xue-xu State Key Laboratory for Advanced Metals and Materials，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: bxq118@ ustb． edu． cn ABSTＲACT Fe78. 3Cu0. 6Nb2. 6 Si9. 5B9 melt-spun ribbons of 6 － 8 mm in width and 30 － 40 μm in thickness were produced by using a single roller melt spinning technique machine． The melt-spun ribbons have the direct current ( DC) magnetic properties of saturation flux Bs = 1. 06 T，remanence Br = 0. 39 T，coercivity Hc = 3. 53 A·m － 1 and maximum permeability μm = 2. 43 mH·m － 1 and the alterna￾ting current magnetic properties of core loss P0. 5 T/1 kHz = 22. 2 W·kg － 1，P0. 2 T/100 kHz = 864 W·kg － 1 and corresponding efficient magnetic permeability μe = 833 and 1225． Field emission high resolution scanning electron microscopy results indicate that the melt-spun ribbons prepared at different technical parameters show different crystallization degrees and fracture morphology characteristics． The fracture surface morphology of the amorphous-nanocrystallized ribbons is composed of a mirror zone，a mist zone，a hackle zone，and a river￾pattern zone，while the crystallized ribbons exhibit intergranular embrittlement． The microhardness and elastic modulus of the amor￾phous-nanocrystallized ribbons measured with a nano-indenter probe are lower than those of the crystallized ribbons． The fracture tough￾ness of the melt-spun ribbons was semi-quantitatively determined by using a self-designed gauge based on the Luborsky method． KEY WOＲDS soft magnetic materials; iron alloys; mechanical properties; magnetic properties; microstructure; amorphous phases; nanocrystals 收稿日期: 2013--08--10 DOI: 10． 13374 /j． issn1001--053x． 2014． 11． 013; http: / /journals． ustb． edu． cn 1988 年 Yoshizawa 等［1］首次报道了 Fe73. 5 Cu1- Nb3 Si13. 5B9纳米晶软磁合金及其在共模扼流圈中的 成功应用． 它同时具有高磁导率、高饱和磁感、高居 里温度及低的高频损耗，是变压器铁芯中硅钢的理