摘要
采用感应熔炼制备了铜基合金Cu 2 0Mg 1 5Ag(质量百分数 ,下同 ) ,并通过滚压和热处理进一步使合金的成分均一化。样品分别在 4 5 0℃和 5 0 0℃下进行不同时间的时效处理 ,然后测定其维氏硬度随时效时间的变化规律。扫描电镜显微分析揭示了合金显微组织结构的演变 ,且表明 ,时效处理后第二相Cu2 Mg沉淀颗粒非常细小 ,并很好地分散于铜基体中。沉淀硬化实现了铜基合金的高效强化 ,最佳的时效条件为 4 5 0℃× 96h。
Cu-based alloy Cu-2.0wt%Mg-1.5wt%Ag was prepared by inductive melting,and its homogeneity was further improved through a combination of rolling and heat treatment.The samples were aged at 450℃ and 500℃ for different time respectively to determine the variation of Vickers hardness with aging time.SEM analysis revealed the evolution of the alloys' microstructures,and demonstrated that the second phase Cu_2Mg is precipitated and well dispersed in the Cu matrix,and its particle size is very tiny.So,the highly efficient strengthening of the Cu-based alloy is attained by precipitation hardening.The optimun aging condition is about 450℃×96h.
出处
《金属热处理》
CAS
CSCD
北大核心
2003年第11期25-28,共4页
Heat Treatment of Metals
关键词
铜基合金
沉淀硬化
时效处理
显微组织
高强度
Cu-based alloy
precipitation hardening
aging treatment
microstructure
high strength
