Sn对AZ80合金电磁半连续铸造坯料凝固质量的影响  

Effect of Sn on Solidification Quality of AZ80 Billets Cast by Electromagnetic Semi-Continuous Casting

作　　者：赵大志 马登民 贾永辉 乐启炽 ZHAO Da-zhi;MA Deng-min;JIA Yong-hui;LE Qi-chi(School of Materials Science and Engineering,Northeastern University,Shenyang 110819,Liaoning,China;Shanxi Yinguang Huasheng Magnesium Co.,Ltd.,Wenxi 043800,Shanxi,China;Key Lab of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学材料科学与工程学院,辽宁沈阳110819 [2]山西银光华盛镁业股份有限公司,山西闻喜043800 [3]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819

出　　处：《铸造》2020年第10期1034-1038,共5页Foundry

基　　金：国家自然基金面上项目(51974082)。

摘　　要：采用电磁半连续铸造工艺,利用探伤技术结合坯料的组织分析,研究了Sn对AZ80合金坯料凝固质量的影响,探讨了合金组织的演变及对凝固质量的改善。结果表明:随着Sn含量的增加,合金组织逐渐细化,缩孔形成趋势降低,金属间化合物及夹杂物偏聚程度减小,且分布趋于均匀。结合熔体精炼中适当提高净化温度和延长净化时间并采用陶瓷过滤装置,可有效降低熔体中夹杂物的残留量,改善合金坯料的凝固质量。The billets of AZ80 alloy containing Sn were cast by electromagnetic semi-continuous casting. The effect of Sn content on the solidification quality of the AZ80 billets was studied by means of chemical composition analysis, X-ray analysis, scanning electron microscope observation, etc. The macrostructure evolution of the alloy and the improvement of the solidification quality were analyzed. The results show that the addition of Sn element to AZ80 alloy, can refine the grain structure of the alloy, decrease the tendency to shrinkage formation, and the segregation degree of intermetallic compounds and inclusions in the alloys. Hence, their distribution is nearly uniform. Moreover, the residual inclusions in the melt could be effectively reduced by increasing the refining temperature and time and by using the ceramic filtration system.

关 键 词：微合金化 凝固质量 夹杂物 半连续铸造 

分 类 号：TG292[金属学及工艺—铸造]