摘要
研究Cu-3．2Ni-0．75Si合金在不同温度时效时的组织转变规律，测量在300-650℃时效不同时间后合金的强度和导电性能；采用透射电镜观察时效合金的显微组织，分析合金时效组织的强化机制。研究结果表明：随着时效时间的延长，合金的导电性能下降，其屈服强度和抗拉强度均快速增加至峰值后缓慢下降；合金在450℃时效处理时，时效2h以前的组织以调幅分解和有序化强化为主，时效4h以后的组织以Ni2Si相强化为主，在2～4h内时效组织强度由调幅分解、有序化和Ni2Si相的复合强化效应决定，合金具有明显的时效析出强化效应。
The effect on aging transformation of Cu-3. 2Ni-0.75Si alloy at different temperatures was studied. The strength and conductivity of alloy aged at 300-650℃ for different time were measured. The microstructures of aging alloy were observed by transmission electron microscopy. The intensify mechanism of aging structure was analyzed. The results show that with the prolong of aging time, the conductivity of alloy decreases, while the yield strength and tensile strength both increase to the maximal values quickly and then decrease slowly. When aging at 450℃, the alloy microcosmic structure is priority intensified by spinodal mechanism and ordering before 2 h, by Ni2 Si phases after 4 h, and the complex strengthened effect is determined by spinodal mechanism, ordering and Ni2Si phases during 2 - 4 h. Aging has strong intensified effect on the alloy.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第3期467-471,共5页
Journal of Central South University:Science and Technology
基金
国家2003年度火炬计划项目(0332030100)
