热处理对Fe−6.5%Si磁粉芯性能的影响  

Influence of heat treatment on performance of Fe-6.5%Si magnetic powder core

作　　者：邱玥 贺弋海 王义富 林少川 孔辉 王锐 QIU Yue;HE Yihai;WANG Yifu;LIN Shaochuan;KONG Hui;WANG Rui(School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243002,China;Ma’anshan Shenma Mchinery Manufacturing Co.,Ltd.,Ma’anshan 243021,China)

机构地区：[1]安徽工业大学冶金工程学院,马鞍山243002 [2]马鞍山市申马机械制造股份有限公司,马鞍山243021

出　　处：《粉末冶金技术》2024年第2期177-183,共7页Powder Metallurgy Technology

基　　金：国家自然科学基金资助项目(51904002);2020年安徽省特支计划(T000609)。

摘　　要：对Fe-6.5%Si粉末(质量分数)进行不同温度的热处理实验,经压制后得到Fe-6.5%Si磁粉芯,并对磁粉芯进行不同温度的热处理,探究热处理工艺对Fe-6.5%Si磁粉芯磁导率和损耗等磁性能的影响。结果发现:粉末热处理可以大幅度消除气雾化制粉过程中合金粉末受高压气体冲击造成的缺陷,并减少粉末中的C、O含量;随着热处理温度的升高,粉末的矫顽力先增后减,饱和磁化强度逐渐降低。通过对压制成型磁粉芯进行热处理也能够改善磁粉芯的磁性能,不同温度热处理后损耗均维持在600~700 mW∙cm^(-3)之间,最低值为625 mW∙cm^(-3)。综合分析,用经900℃热处理粉末制成的磁粉芯在800℃进行后续热处理,磁粉芯磁导率、损耗等性能综合较优。Fe-6.5%Si(mass fraction)powders were subjected to the heat treatment experiments at the different temperatures combined with the heat treatment of the magnetic powder cores.The effect of heat treatment on the magnetic properties of Fe-6.5%Si magnetic powder cores,such as permeability and loss,was investigated.In the results,the powder heat treatment can greatly eliminate the defects caused by the impact of high pressure gas on the alloy powders during the gas atomization powder production and reduce the carbon and oxygen content in the powders.With the increase of heat treatment temperature,the coercive force of the powders first increases and then decreases,and the saturation magnetization gradually decreases.The magnetic properties of the prepared Fe-6.5%Si magnetic powder cores can also be improved by heat treatment.After the heat treatment at different temperatures,the loss is maintained between 600 and 700 mW∙cm^(-3),and the lowest value is 625 mW∙cm^(-3).Compared with other comparison samples,the magnetic powder cores made of the Fe-6.5%Si powders heat-treated at 900℃have the better magnetic conductivity and loss after the subsequent heat t reatment at 800℃.

关 键 词：磁粉芯 铁硅合金 热处理 磁性能 

分 类 号：TF124[冶金工程—粉末冶金] TG271.2[冶金工程—冶金物理化学]