Al-Cu-Mg-Ag新型耐热铝合金循环蠕变时效研究  

Study on Cyclic Creep Aging of Al-Cu-Mg-Ag New Type of Heat-resistant Aluminum Alloy

作　　者：刘彦鹏 刘晓艳 杨鸿儒 王艳琴 王路路 郑立允 申勇 LIU Yanpeng;LIU Xiaoyan;YANG Hongru;WANG Yanqin;WANG Lulu;ZHENG Liyun;SHEN Yong(College of Materials Science and Engineering,Hebei University of Engineering,Handan,Hebei 056038,China;New Casting Pipe Co.LTD,Handan,Hebei 056038,China)

机构地区：[1]河北工程大学材料科学与工程学院,河北邯郸056038 [2]新型铸管有限公司,河北邯郸056038

出　　处：《河北工程大学学报（自然科学版）》2021年第2期93-98,共6页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：河北省高等学校科学技术研究项目(ZD2018213);国家自然科学基金资助项目(51601053);河北省自然科学基金资助项目(E2017402039,E2017402139)。

摘　　要：采用矩形波加载方式,对Al-Cu-Mg-Ag新型耐热铝合金进行循环蠕变时效处理,采用力学性能测试、耐腐蚀性能测试,并结合电化学分析、透射电镜分析和金相显微分析等,研究了循环蠕变时效对Al-Cu-Mg-Ag合金的微观组织与性能的影响。试验结果表明:循环蠕变时效能够提高合金的力学性能和抗腐蚀性能。循环蠕变时效能够细化合金中晶内和晶界析出相,促进θ′相析出,减小无沉淀析出带宽度,晶粒沿着蠕变方向被拉伸。200 MPa下循环蠕变试样综合性能最佳。Al-Cu-Mg-Ag new-type heat-resisting aluminum alloy was aged by cyclic creep with a rectangle wave load.The effect of cyclic creep aging on the microstructure and properties of Al-Cu-Mg-Ag alloy was researched by mechanical performance test,corrosion resistant performance tests,and combined with electrochemical analysis,transmission electron microscopy analysis and metallographic microscopic analysis,etc..The results show that cyclic creep aging can improve the mechanical properties and corrosion resistance of the alloy.Cyclic creep aging can refine the precipitations both in the grains and on the grain boundaries,and can also promote the precipitation ofθ′phase.The width of the precipitation free zones(PFZ)is reduced and the grains are stretched along the creep direction.The sample cyclic creep aged with a load of 200 MPa has the best comprehensive performance.

关 键 词：A1-Cu-Mg-Ag 循环蠕变时效 力学性能 腐蚀性能 微观组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]