磁性材料及器件第54卷第3期2023年5月•30•热处理对双合金工艺制备的(Nd,Tb)-Fe-B烧结磁体矫顽力的影响屈凯,高岩,于海洋,付建龙,刘国征(包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014010)摘要:为了在降低重稀土用量的情况下进一步提高磁体矫顽力,应用双合金工艺将主合金粉与辅合金粉按7.5:2.5比例混合制备出双合金Nd-Fe-B烧结磁体。探究了回火工艺对稀土双合金磁体矫顽力的影响,并通过扫描电镜表征了热处理对合金微观结构和组分分布的影响。结果发现,在特定的烧结温度和回火下,合金主相能分布更加均匀,且在其周围的含重稀土相趋于形成薄的壳层结构。该实验方案在保证磁能积基本不降低的前提下通过特定的烧结和时效等热处理工艺有效提高了磁体矫顽力。通过优化热处理方式,最后得到矫顽力为18.57kOe、磁能积为48.53MGOe的高性能磁体。关键词:Nd-Fe-B烧结磁体;双合金;热处理;矫顽力;磁能积中图分类号:TM27文献标识码:A文章编号:1001-3830(2023)03-0030-05DOI:10.19594/j.cnki.09.19701.2023.03.005著录格式:屈凯,高岩,于海洋,等.热处理对双合金工艺制备的(Nd,Tb)-Fe-B烧结磁体矫顽力的影响[J].磁性材料及器件,2023,54(3):30-34.//QUKai,GAOYan,YUHai-yang,etal.EffectofheattreatmentoncoercivityofNd-Fe-Bsinteredmagnetspreparedbydualalloyprocess[J].JournalofMagneticMaterialsandDevices,2023,54(3):30-34.EffectofheattreatmentoncoercivityofNd-Fe-BsinteredmagnetspreparedbydualalloyprocessQUKai,GAOYan,YUHai-yang,FUJian-long,LIUGuo-zhengBaotuResearchInstituteofRareEarth,StateKeyLaboratoryforResearchandComprehensiveUtilizationofRareEarthResourcesinBayanEbo,Baotou014010,ChinaAbstract:Inordertoimprovethecoercivityofthemagnetwhilereducingtheamountofheavyrareearths,theNd-Fe-Bbi-alloysinteredmagnetwaspreparedbymixingthemainalloypowderandtheauxiliaryalloypowderinaratioof7.5:2.5byusingthedoublealloyprocess.Theinfluenceoftemperingprocessonthecoercivityofrareearthdoublealloymagnetswasexplored,andtheeffectofheattreatmentonthemicrostructureandcomponentdistributionofthealloywascharacterizedbySEM.Theresultsshowthatthedistributionofthemainphaseenergyismoreuniformandtheheavyrareearthphasesaroundthealloytendtoformathinshellstructure...