摘要
采用3种不同的工艺(直接在450℃下进行时效处理;80%冷轧,然后在450℃下进行时效处理;600℃/8 h高温预时效+80%冷轧+780℃/2 min+450℃/16 h终时效)对固溶处理后的Cu-2.0Ni-0.34Si-Mg合金进行形变热处理,研究形变热处理工艺对该合金的组织与硬度及电导率的影响。结果表明:采用第3种工艺对合金进行形变热处理,由于其中的短时高温预处理可以获得溶质原子充分固溶的过饱和固溶体,因此终时效后的合金具有最佳的综合性能,显微硬度为180 HV,相对电导率为49.8%IACS,伸长率为13%。合金的平均晶粒尺寸约为20μm,主要析出强化相为δ-Ni2Si。
Three deformation heat treatment conditions including 450℃ aging treatment, 80% cold rolling＋450℃ aging treatment, 600℃/8 h aging treatment＋80% cold rolling＋780℃/2 min solution treatment ＋450℃/16 h aging treatment for Cu-2.0Ni-0.34Si-Mg alloy were studied. The effect of heat treatment on microstructure, micro-hardness and electrical conductivity of Cu-2.0Ni-0.34Si-Mg alloy was explored. The results show that with the solution treatment （780℃/2 min） of the third condition, the solute atoms dissolve into the matrix and the copper alloy becomes supersaturated solid solution again because of short time and high temperature pre-treatment, which determines that this condition is preferable with micro-hardness of 180 HV, electrical conductivity of 49.8% and elongation of 13%, respectively. The average grain size is about 20μm, and the main strengthening phase isδ-Ni2Si.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2014年第6期928-934,共7页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金资助项目(51271203)
中南大学贵重仪器设备开放共享基金资助项目(CSUZC2013017)
