【作者】 李腾； 郭朝晖； 李卫；

【Author】 Li Teng Guo Zhaohui Li Wei (Central Iron & Steel Research Institute,Beijing, 100081)

【机构】 钢铁研究总院功能材料所；

【摘要】 首先对Pt—Co合金的相结构和相转变以及内禀磁性能作了介绍,合金在高温固溶后形成无序的面心立方相,时效后形成具有永磁性能的四方相。时效后合金所具有的较高的磁晶各向异性是产生高矫顽力的原因。合金的热处理制度主要分为两步:在1000—1100℃进行固溶并分别在680℃和600℃进行时效。在可加工永磁中,Pt-Co合金的磁性能较高,对性能起决定作用的是680℃时效,随时效时间的延长,合金的Br、Hc和(BH)max呈现不同的变化趋势。总体来讲,该合金是一种在特定场合有特殊应用的永磁材料。更多还原

【Abstract】 phase structure, phase transformation and intrinsic magnetic properties of Pt-Co alloys were introduced,Pt-Co alloys form a face-centered cubic phase after solution treated at high temperature,and form an ordered tetragonal phase after annealing. High coercivity is achieved after annealing because of the high magnetocrystalline anisotropy in the alloys. The heat treatment technique of the alloy could mainly be divided into two steps,solution at 1000 - 1100℃ and annealing at 680℃ and 600℃. Pt-Co alloys have relatively higher magnetic performance than other ductile permanent magnets, annealing at 680℃ is crucial to the properties. Br, Hc and ( BH) max vary in different ways along with annealing time. In general, Pt-Co alloys are magnetic materials which have special applications in special circumstances.更多还原