【摘要】 采用单辊快速凝固技术制备了Mg94.6Zn4.8Y0.6合金薄带,研究了薄带的组织及性能特征。结果表明:Mg94.6Zn4.8Y0.6镁合金快速凝固薄带组织由过饱和的单相-αMg固溶体组成,沿厚度方向分为两个晶区:近辊面粗大等轴晶区和自由面细小等轴晶区。Mg94.6Zn4.8Y0.6合金快速凝固薄带的显微硬度为85.95HV,在250℃左右保温2 h的显微硬度最高,超过该温度(250~300℃)显微硬度显著下降。更多还原

【Abstract】 The ribbons of rapidly solidification（RS） Mg_94.6Zn_4.8Y_0.6 alloy were obtained by a single roller apparatus whose microstructures and properties were investigated.The results show that different microstructures are observed through the thickness section of RS ribbons of Mg_94.6Zn_4.8Y_0.6 alloy,which are coarse equiaxed grain region closed to the copper roll side and fine equiaxed grain region in the free surface layer.The XRD analysis results indicate that the microstructure of the RS ribbons is composed of the single phase α-Mg supersaturated solid solution.The microhardness of RS ribbons of Mg_94.6Zn_4.8Y_0.6 alloy is（HV85.95）.After the ribbons annealed,the maximum microhardness was gained at 250 ℃ and microhardness obviously decreased in the range of 250～300 ℃.更多还原