固溶时效处理对Cu-Al合金机械性能的影响研究  

Effect of solution aging treatment on mechanical properties of Cu-Al alloy

作　　者：王圣斌 周少东 WANG Shengbin;ZHOU Shaodong(School of Intelligent Manufacturing,Anhui Wenda University of Information Engineering,Hefei 231201, China;Ningbo Green Power Hydrogen Technology Research Institute Co., Ltd. Ningbo 315000, China)

机构地区：[1]安徽文达信息工程学院智能制造学院,合肥231201 [2]宁波绿动氢能科技研究院有限公司,浙江宁波315000

出　　处：《功能材料》2022年第4期4117-4120,4161,共5页Journal of Functional Materials

基　　金：国家自然科学地区基金项目(51868075);2020年度安徽高校自然科学研究项目(KJ2020A0816);安徽文达信息工程学院2020年度校级质量工程项目(2020xkc09)。

摘　　要：以Cu-Al-Ni-Fe-Mn为研究对象,在固定固溶处理温度为900℃、固溶时间为1 h的条件下,通过改变时效处理温度,研究了不同时效处理温度对Cu-Al合金性能的影响。采用洛氏硬度计、SEM、电子万能试验机等对铜铝合金的洛氏硬度、微观形貌和力学性能等进行了分析。结果表明,随着时效处理温度的升高,Cu-Al合金的硬度、抗拉强度和断裂延伸率均先升高后降低,当时效处理温度为550℃时,Cu-Al合金的硬度达到了最大值45.2 HRC,抗拉强度和断裂延伸率分别达到最大值895.8 MPa和2.38%,时效处理效果最佳。形貌分析可知,随着时效处理温度升高到550℃,Cu-Al合金的硬质相和第二相粒子增多,沉淀强化的效果增强,且断口形貌的韧窝加深,位错滑移的难度增加,从而使Cu-Al合金的力学性能得到了显著改善。综合可知,Cu-Al合金的最佳时效处理温度为550℃。Taking Cu-Al-Ni-Fe-Mn as the research object,the effects of different aging treatment temperatures on the properties of Cu-Al alloy were studied by changing the aging treatment temperature under the conditions of fixed solution treatment temperature of 900℃and solution time of 1 h.The Rockwell hardness,micro morphology and mechanical properties of copper aluminum alloy were analyzed by Rockwell hardness tester,SEM and electronic universal testing machine.The results showed that with the increased of aging treatment temperature,the hardness,tensile strength and fracture elongation of Cu-Al alloy first increased and then decreased.When the aging treatment temperature was 550℃,the hardness of Cu-Al alloy reached the maximum 45.2 HRC,the tensile strength and fracture elongation reached the maximum 895.8 MPa and 2.38%respectively.The morphology analysis showed that with the increased of aging treatment temperature to 550℃,the hard phase and second phase particles of Cu-Al alloy increased,the effect of precipitation strengthening increased,the dimple of fracture morphology deepened,and the difficulty of dislocation slip increased,so that the mechanical properties of Cu-Al alloy havd been significantly improved.It can be seen that the optimum aging treatment temperature of Cu-Al alloy is 550℃.

关 键 词：CU-AL合金 固溶处理 时效处理 硬度 力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—金属材料]