在氩气保护下用单辊熔体快淬法制备了不同Cu含量的Sm(Co0.74CuxFe0.1Zr0.04)8(x(Cu)=0,x(Cu)=0.1%,x(Cu)=0.12%,x(Cu)=0.16%)快淬带.将快淬带进行不同温度(400、500、600、700℃)回火处理.用振动样品磁强计、差热分析仪和X-射线衍射仪分别测定了样品的磁性、相变行为和相结构.研究表明,x(Cu)=0.12%的Sm(CoCuFeZr)8合金矫顽力最高,X-射线结构分析显示其对应的主要相为Cu7Tb型1:7相结构.X(Cu)=0.12%样品的快淬态与500℃回火态的衍射峰比较,其快淬态衍射峰稍有宽化,表明500℃回火后晶粒稍有长大.高温M-T磁性分析和差热分析DTA分析显示在380℃和801℃有磁相变,380℃有1:5相亚温分解，801℃是1:7相的居里点.分析表明500℃回火后矫顽力的提高是由于Cu向晶界的偏聚造成钉扎作用增强引起的.
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