合金成分对Al-Zn-Mg-Cu合金凝固结晶相的影响  

Effect of Alloy Composition on Solidified Crystalline Phase of Al-Zn-Mg-Cu Alloy

作　　者：刘园 崔岩[1] 蒋大鸣[2] LIU Yuan;CUI Yan;JIANG Daming(Department of Materials Science and Engineering,Northern University of Technology,Beijing 100144,China;School of Materials Science and Engineering,Harbin University of Technology,Harbin 150001,China)

机构地区：[1]北方工业大学材料科学与工程系,北京100144 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《热加工工艺》2021年第19期57-60,共4页Hot Working Technology

摘　　要：采用Jmat-Pro热力学相图计算软件对Al-Zn-Mg-Cu系铝合金的凝固过程及其结晶相形成规律进行了模拟。结果表明,Al-7.0Zn-2.3Mg-1.8Cu合金非平衡凝固过程中先后形成了Al_(3)Zr、α(Al)、Al3Fe、Mg_(2)Si、MgZn_(2)和Al_(7)Cu_(2)Fe相。不同合金中的η(MgZn_(2))、T(Al Zn Mg Cu)和S(Al_(2)Cu Mg)相的结晶温度区间分别为473.5~476℃、465~482℃和475~479℃。η(MgZn_(2))、T(AlZnMgCu)相的形成依赖于Zn/Mg比,且随着Cu含量的增加而减少。S(Al_(2)CuMg)相的生成量随Zn、Mg含量的增加而减少,随Cu含量的增加而增加。The solidification process and crystallization phase formation of Al-Zn-Mg-Cu series aluminum alloy were simulated by Jmat-Pro thermodynamic phase diagram software.The results show that Al_(3)Zr,α(Al),Al_(3)Fe,Mg_(2)Si,Mg Zn2and Al_(7)Cu_(2)Fe phases are formed successively in the process of non-equilibrium solidification of Al-7.0Zn-2.3Mg-1.8Cu alloy.The crystallization temperatures ofη(MgZn_(2)),T(Al Zn Mg Cu) and S(Al_(2)Cu Mg) phases are 473.5-476℃,465-482℃and 475-479℃,respectively.The formation ofη(Mg Zn_(2)) and T (Al Zn Mg Cu) phases depends on Zn/Mg ratio and decreases with the increase of Cu content.The amount of S(Al_(2)Cu Mg) phase decreases with the increase of Zn and Mg content,and increases with the increase of Cu content.

关 键 词：AL-ZN-MG-CU合金 非平衡凝固 结晶相 

分 类 号：TG244.3[金属学及工艺—铸造] TG166.3