(1. 中南大学 材料科学与工程学院，长沙 410083；
2. 中南大学 有色金属材料科学与工程教育部重点实验室，长沙 410083)
摘 要: 采用正交试验法，结合金相、X射线衍射、扫描电镜、能谱和力学性能等分析测试手段，对一种自主研发的Cu-Al-Fe-Ni变形铝青铜的固溶和时效强化工艺进行研究。结果表明：固溶时效工艺参数对合金抗拉强度、伸长率和硬度的作用主次顺序为时效温度、固溶温度、时效时间、固溶时间，其中温度对合金力学性的影响趋势单一，但时间的影响较复杂。经优化获得的最佳固溶时效工艺为：先在880 ℃下固溶3 h、水淬，再在 480 ℃下时效1 h、空冷。合金的抗拉强度达810 MPa，伸长率达9%，硬度达255 HB，其综合力学性能比挤压态合金的有较大幅度的提高；软硬相的面积比及其显微硬度对合金的力学性能有较大的影响。
关键字: 变形铝青铜；固溶；时效；正交设计；力学性能
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education,
Central South University, Changsha 410083, China）
Abstract:The solution and aging treatments of a novel Cu-Al-Fe-Ni wrought aluminum bronze were investigated by orthogonal experiments. The methods of analysis and test include OM, XRD, SEM, EDS and mechanical tests. The results show that the acting order of parameters of solution and aging on the mechanical properties is as follows: aging temperature, solution temperature, aging time, and solution time. The influence of solution temperature and aging temperature on the mechanical properties is single, while the influence with the solution time and aging time is more complex. By optimization, the best solution and aging processes are confirmed as: solution treated at 880 ℃ for 3 h and then aged at 480 ℃ for 1 h. The comprehensive mechanical properties of the alloy treated under the optimized processes are greatly improved (σb=810 MPa, δ=9%, 255 HB). The area ratio of soft phases to hard phases and their microhardnesses have great influences on the mechanical properties.
Key words: wrought aluminum bronze; solution; aging; orthogonal design; mechanical properties
