分步纵磁热处理对Fe_(3.85)Co_(66.18)Si_(14.5)Ni_(0.97)B_(14.5)钴基非晶合金结构和性能的调控  

Modulation of structure and properties of Fe_(3.85)Co_(66.18)Si_(14.5)Ni_(0.97)B_(14.5) cobalt-based amorphous alloy by stepwise longitudinal magnetic heat treatment

作　　者：耿俊昭 刘天成 李立军[2] 潘贇[2] 张伟 Geng Junzhao;Liu Tiancheng;Li Lijun;Pan Yun;Zhang Wei(China Iron&Steel Research Institute Group Beijing,Beijing 100081,China;Advanced Technology&Materials Co.,Ltd.,Beijing 100081,China)

机构地区：[1]中国钢研科技集团有限公司,北京100081 [2]安泰科技股份有限公司,北京100081

出　　处：《金属热处理》2022年第12期126-131,共6页Heat Treatment of Metals

基　　金：国家重点研发计划(2021YFB3800505)。

摘　　要：为了制备低磁导率、高矩形比、低矫顽力的钴基非晶合金,对Fe_(3.85)Co_(66.18)Si_(14.5)Ni_(0.97)B_(14.5)非晶合金带材采用施加不同热处理工艺,且对其结构和性能进行测试分析的方式进行调控。结果表明,分步纵磁热处理之后的磁芯弛豫焓降低,致密度和有序度增加;在晶化温度之下进行退火的合金都保持非晶态;分步纵向磁场热处理可显著提升磁芯的磁学性能,且当普通热处理温度为480℃时,性能最佳,矫顽力0.17 A/m、矩形比96.81%、1 kHz的有效磁导率为5675.05,且此时的磁畴呈规则的板条状,取向与外磁场呈12.8°的夹角。基于Bertitto模型对其进行损耗分离,发现满足公式Pv=11.05×f×B^(0.9814)_(m)+0.7495×f^(2)×B^(2)_(m)。In order to prepare cobalt-based amorphous alloys with low permeability and high rectangular ratio and low coercivity,Fe_(3.85)Co_(66.18)Si_(14.5)Ni_(0.97)B_(14.5) amorphous alloy strips were subjected to different heat treatments and then their microstructure and properties were tested and analyzed.The results show that the relaxation enthalpy of the cores decreases after stepwise longitudinal magnetic heat treatment,while the densities and orderliness increase,and the alloys annealed below the crystallization temperature remain amorphous.The stepwise longitudinal magnetic heat treatment significantly improves the magnetic properties of the cores,and the best properties are achieved when the traditional heat treatment temperature is 480℃,with a coercivity of 0.17 A/m,a rectangular ratio of 96.81%,and an effective magnetic permeability of 5675.05 at 1 kHz.At this time the magnetic domains are in the form of regular slats and oriented at an angle of 12.8°to the external magnetic field.Based on Bertitto model,the loss separation is found to satisfy the equation:Pv=11.05×f×B^(0.9814)_(m)+0.7495×f^(2)×B^(2)_(m)

关 键 词：分步纵磁热处理 钴基非晶合金 磁畴 磁学性能 损耗分离 

分 类 号：TG156.2[金属学及工艺—热处理]