双级时效工艺对QAl9-4铝青铜力学性能的影响  

Effect of two-stage aging process on mechanical properties of QAl9-4 aluminum bronze alloy

作　　者：宗林 赵鸿金[1] 胡玉军[1,2] 张兵 徐星星[1] ZONG Lin;ZHAO Hongjin;HU Yujun;ZHANG Bing;XU Xingxing(Faculty of Material Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;School of Aeronautical Engineering,Jiangxi Teachers College,Yingtan 335000,Jiangxi,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000 [2]江西师范高等专科学校航空工程学院,江西鹰潭335000

出　　处：《有色金属科学与工程》2024年第3期392-399,431,共9页Nonferrous Metals Science and Engineering

基　　金：江西省教育厅科学技术研究项目(GJJ181176);江西理工大学研究生创新专项资金项目(XY2021-S050)。

摘　　要：采用正交实验研究双级时效工艺对QAl9-4铝青铜组织与性能的影响。发现不同工艺参数对合金性能影响强度不同,影响顺序由大到小为二级时效温度>一级时效温度>一级时效时间>二级时效时间。对正交实验结果进行方差分析得到最优双级时效工艺为(150℃/2h)+(500℃/2.5h),并以此工艺对合金进行处理。与单级时效处理相比,双级时效处理后的合金抗压强度、极限压缩率、硬度分别提升了14.79%、25.59%和5.28%。最后对不同时效工艺处理的合金进行显微结构表征,发现性能差异来源于双级时效处理后的合金含有更多弥散分布的强化相和更少的γ2相,因此对QAl9-4铝青铜进行双级时效处理可以获得比单级时效处理更优异的性能。In this paper,the effects of the aging process on the microstructure and mechanical properties of QAl9-4 aluminum bronze alloy were investigated with orthogonal test.The results show that different process parameters have different effects on alloy properties,with the order of influence degree being second-order aging temperature>first-order aging temperature>first-order aging time>second-order aging time.The variance analysis of orthogonal test results showed that the optimal two-stage aging process was(150℃/2 h)+(500℃/2.5 h),and the alloy was treated by this process.Compared with the single-stage aging treatment,the compressive strength,ultimate compression ratio,and hardness of the alloy treated by the optimized two-stage aging process are increased by 14.79%,25.59%,and 5.28%,respectively.Finally,the microstructure characterization was performed on alloys treated under different aging processes.The results reveal that the differences in properties are attributed to the alloys after two-stage aging treatment containing more dispersed enhanced phases and fewerγ2 phases.Therefore,QAl9-4 aluminum bronze alloy can obtain better performance by two-stage aging treatment than that of single-stage aging treatment.

关 键 词：铝青铜 抗压强度 双级时效 正交实验 

分 类 号：TG166.2[金属学及工艺—热处理]