Fe73Si15Nb3B8Cu1铁芯薄带的热处理工艺研究  

Heat Treatment Process of Fe73Si15Nb3B8Cu1 Core Ribbons

作　　者：杜帅龙 孙继兵[1] 张硕东 王舒[1] 董志鑫 张磊 Du Shuailong;Sun Jibing;Zhang Shuodong;Wang Shu;Dong Zhixin;Zhang Lei(Key Laboratory for New Type of Functional Materials in Hebei Province,Hebei University of Technology,Tianjin 300130,China;Tianjin Sun Hope New Energy Technology Co.,Ltd,Tianjin 300401,China)

机构地区：[1]河北工业大学河北省新型功能材料重点实验室,天津300130 [2]天津中晟泰新能源科技有限公司,天津300401

出　　处：《稀有金属材料与工程》2019年第10期3352-3358,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51671078,51271072);河北省自然科学基金(E2019202035)

摘　　要：对用Finemet型Fe73Si15Nb3B8Cu1快淬薄带制备的铁芯增加预退火处理,再在540℃进行晶化退火处理得到退火铁芯,研究了预处理温度对铁芯薄带的微观结构、力学性能、热力学性能及软磁性能的影响。结果表明,随着预退火温度的提高,预退火的薄带及再经晶化退火的薄带的韧性均逐渐降低,预退火后非晶薄带的第1晶化温度变化不大,而第2晶化峰值温度向高温方向偏移,预退火扩大了非晶薄带晶化退火的温度范围,有利于获得性能更加稳定的非晶纳米晶薄带;增加预退火处理的薄带的晶粒分布比直接晶化退火薄带的更均匀,其中在450℃预退火的薄带经晶化退火后,晶粒尺寸在8~15 nm之间。增加预退火处理的铁芯样品,其振幅磁导率和比总损耗较直接退火的均有明显改善,其中经450℃预退火的铁芯具有最大的振幅磁导率(μa=8.6×10^4,f=10kHz)和最小的交流比总损耗(P0.5/10k=8.73W/kg),分别较直接退火的铁芯升高了16.0%,下降了17.0%。Finemet-type Fe73Si15Nb3B8Cu1 ribbon cores were prepared through adding pre-annealing treatment before crystallization annealing at 540 ℃,and the effect of pre-annealing temperature on the microstructure,mechanical properties,thermodynamic property and soft magnetic properties of iron core ribbons were studied.Results show that with an increase of the pre-annealing temperature,the toughness of the pre-annealed and the final crystallization annealed ribbons gradually decreases;and the second crystallization peak temperature shifts toward the higher temperature,although the difference among the first crystallization temperatures of the amorphous ribbons by pre-annealing treatment at different temperatures is not obvious.Namely,the pre-annealing expands the crystallization annealing temperature range for the amorphous ribbon,which is beneficial to more stable and high performance amorphous nanocrystalline ribbons.The grain size of the additional pre-annealed ribbons is more uniform than that of the direct crystallization annealed ribbons,which is in the range of 8~15 nm for the ribbons by additional pre-annealing at 450 ℃.The amplitude permeability and total loss density of iron cores with pre-annealing treatment have been significantly improved compared with those of directly annealed samples,particularly,the core pre-annealed at 450 ℃ has the largest amplitude magnetic permeability(μa=8.6×10^4,f=10 kHz) and the smallest AC total loss density(P0.5/10 k=8.73 W/kg),which are increased by 16.0% and decreased by 17.0%,respectively.

关 键 词：非晶纳米晶薄带 熔体快淬 热处理 微观结构 磁性能 

分 类 号：TG132.271[一般工业技术—材料科学与工程]