CAJ | 학술논문

　　以羰基铁粉和羰基镍粉为原料粉末，采用金属注射成形(MIM)工艺制备 Fe-50%Ni 软磁合金，分别采用炉冷、空冷、油冷和液氮冷等4种冷却方式对该合金进行热处理，借助 TEM 分析和居里温度测量等检测技术系统研究冷却方式对其磁性能的影响，并对不同热处理方式导致试样磁性能差异的根本原因进行分析。结果表明：热处理冷却方式对注射成形 Fe-50%Ni 软磁合金的密度、杂质含量和晶粒尺寸影响都不大，但对磁性能的影响非常明显，随冷却速率加快，该合金的矫顽力先增大后减小。液氮冷却的试样磁性能最好，其饱和磁感应强度为1.45 T，矫顽力为7 A/m，最大磁导率为72.47 mH/m，初始磁导率为10.12 mH/m。油冷和液氮冷却试样中存在亚稳 FeNi有序相，导致合金的磁性能大幅提高。
　　이탄기철분화탄기얼분위원료분말，채용금속주사성형(MIM)공예제비 Fe-50%Ni 연자합금，분별채용로랭、공랭、유랭화액담랭등4충냉각방식대해합금진행열처리，차조 TEM 분석화거리온도측량등검측기술계통연구냉각방식대기자성능적영향，병대불동열처리방식도치시양자성능차이적근본원인진행분석。결과표명：열처리냉각방식대주사성형 Fe-50%Ni 연자합금적밀도、잡질함량화정립척촌영향도불대，단대자성능적영향비상명현，수냉각속솔가쾌，해합금적교완력선증대후감소。액담냉각적시양자성능최호，기포화자감응강도위1.45 T，교완력위7 A/m，최대자도솔위72.47 mH/m，초시자도솔위10.12 mH/m。유랭화액담냉각시양중존재아은 FeNi유서상，도치합금적자성능대폭제고。
Fe-50%Ni soft magnetic alloy was prepared through MIM (metal injection molding) technique using carbonyl iron powder and carbonyl nickel powder as raw materials. The effect of heat treatment condition on the magnetic properties of MIM Fe-50%Ni soft magnetic alloy was systematicly investigated. The experiment results show that the heat treatment cooling rate has little effect on density, impurity content and grain size, while with the cooling rate increases, the coercive force first decreases and then increases. Liquid nitrogen cooled samples have the best magnetic properties, such as saturation induction of 1.45T, coercive force of 7A/m, maximum magnetic permeability of 72.47 mH/m and initial magnetic permeability of 10.12 mH/m. Transmission electron microscopy observation and curie temperature detection suggest that there exist the second phase metastable FeNi ordered phase which can improve the magnetic properties of oil and liquid nitrogen cooled samples.