多级淬火工艺对7050铝合金组织及性能影响  

Effect of Multistage Quenching on Microstructure and Properties of 7050 Al Alloy

作　　者：尚长沛[1] 朱成俊[1] 

机构地区：[1]河南工业职业技术学院,河南南阳473000

出　　处：《热加工工艺》2015年第22期154-156,共3页Hot Working Technology

基　　金：河南工业职业技术学院院长基金资助项目(GYYJ20140021)

摘　　要：利用金相显微观察、X射线衍射物相分析以及力学性能试验,分别研究了不同级淬火工艺条件对铸态7050铝合金的显微组织、第二相以及力学性能的影响规律。结果表明:经不同级淬火工艺处理7050铝合金的显微组织及力学性能有明显的不同。未淬火的铝合基体晶粒粗大,晶界处出现的细小晶粒及第二相组织较少,力学性能较低。淬火处理后,晶界处出现明显的细小晶粒以及较多的第二相组织;同时,随淬火次数的增多,晶界处析出的第二相组织及细小晶粒数量明显增多,且力学性能逐渐提高;当对7050铝合金采用三级淬火工艺时,晶界处析出的第二相组织及细小晶粒数量最多,且该工艺条件下力学性能最高。Effects of multistage quenching process on microstructure, the second phase and mechanical properties of 7050 A1 alloy were studied and analysised by means of metallographic microscope, XRD phase analysis and mechanical properties test respectively. Experimental results show that the microstructure and mechanical properties are significantly different under the different conditions of quenching process. In unadopted quenching process, the Al alloy matrix grain is oversize, the number of the fine grain and the second phase is fewer, and the mechanical performance is poor, In adopted quenching process, the number of the fine grain and the second phase is more. Meanwhile, with the number of frequency quenching increasing, the quantity of the fine grain and the second phase increases obviously, and the mechanical properties increase gradually. In the when takes triple quenching process, the number of the second phase organization and fine grain is most, and the mechanical properties is best.

关 键 词：7050铝合金 多级淬火 显微组织 力学性能 

分 类 号：TG156.3[金属学及工艺—热处理]