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研究了机械合金化诱发AgCu20Ni2过饱和合金粉末的形成及粉末冶金方法制备AgCu20Ni2合金的过程,对获得的AgCu20Ni2合金的组织和物理性能关系进行了分析,探讨了制备工艺和冷压变形对合金综合性能的影响。结果表明:采用高能球磨30 h,可获得纳米晶的过饱和合金粉末;合金粉末制备的AgCu20Ni2合金由富Ag的基体α相和均匀分布的析出β相构成,析出相界面结构能有效阻碍基体中位错的运动,强化效果明显。合金断口的SEM、EDS分析表明,AgCu20Ni2合金的断裂类型为韧性断裂。
The formation of AgCu20Ni2 supersaturated alloy powders induced by mechanical alloying and the preparation of AgCu20Ni2 alloy by powder metallurgy were studied. The relationship between microstructure and physical properties of AgCu20Ni2 alloy was analyzed. The effects of preparation process and cold deformation on the properties of alloy, Impact. The results show that the nanocrystalline supersaturated alloy powders can be obtained by high energy ball milling for 30 h. The AgCu20Ni2 alloy prepared by the alloy powders consists of the α phase rich in Ag and the β phase precipitated uniformly distributed. The precipitated phase interface structure can effectively hinder the matrix Dislocation of the movement, the strengthening effect is obvious. SEM and EDS analysis of alloy fracture show that the fracture type of AgCu20Ni2 alloy is ductile fracture.