预制锭无熔剂重熔对ZM6镁合金组织与性能的影响  

Effects of Remelting without Fusion Agent on Microstructure and Properties of Prefabricated Ingots of ZM6 Magnesium Alloy

作　　者：董含武 叶小舟 罗素琴 詹俊 Dong Hanwu;Ye Xiaozhou;Luo Suqin;Zhan Jun(Chongqing Key Laboratory of Advance Formation Technology of Metallic Powder Materials,Chongqing Acad-emy of Science and Technology,Chongqing 401123;School of Aeronautics,Chongqing Jiaotong University,Chongqing 400074;National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400044)

机构地区：[1]重庆市科学技术研究院金属粉体材料先进成型技术重庆市重点实验室,重庆401123 [2]重庆交通大学航空学院,重庆400074 [3]重庆大学国家镁合金材料工程技术研究中心,重庆400044

出　　处：《特种铸造及有色合金》2024年第5期641-646,共6页Special Casting & Nonferrous Alloys

基　　金：重庆市科技局资助项目(cstc2021jcyj-msxmX1215);重庆市渝北区科技局资助项目(2022-R-21)。

摘　　要：研究了ZM6镁合金锭无熔剂的重熔,重点研究了气体精炼时间、熔体过热保温温度和时间对重熔后合金的微观组织与力学性能的影响,并考察了合金的组织遗传性。结果表明,重熔后,Nd元素有较明显的烧损;熔炼工艺参数对合金强度产生影响由大到小依次为:过热保温温度、气体精炼、保温时间,最优化条件分别为760℃、3 min、40 min;影响合金伸长率由大到小依次为:过热保温温度、保温时间、气体精炼时间,最优化条件分别为760℃、60 min、3 min;800℃保温可以弱化合金的遗传性,此温度下的优化保温时间为60 min。Microstructure and mechanical properties of prefabricated ingots were analyzed.Effects of the time of gas refining,the temperature and holding time of overheating insulation were analyzed.The results indicate that the Nd content is burned after remelting.The affecting sequence of parameters on strength of the alloy ingot is over-heating holding temperature,degassing time and holding time,of which optimized values are 760℃,3 min and 40 min,and affecting sequence on the elongation are over-heating holding temperature,holding time and degassing time,of which optimized values are 760℃,60 min and 3 min.The heredity of the alloy can be weakened holding at 800℃,and the optimized holding time is 60 min.

关 键 词：ZM6镁合金 预制锭 重熔 微观结构 力学性能 

分 类 号：TG292[金属学及工艺—铸造] TG146.22[一般工业技术—材料科学与工程]