(1. 山东大学 材料液态结构及其遗传性教育部重点实验室，
济南 250061；
2. 山东费县银光镁业有限公司， 费县 273400)
摘 要: 制备了一种用于Mg-Al合金晶粒细化的Al-Ti-C中间合金。 发现该Al-Ti-C中间合金可以有效地细化镁合金的晶粒，细化后的AZ61合金的抗腐蚀性能大大提高。分析认为， Al-Ti-C中间合金中起晶粒细化作用的是Al4C3和TiC的复合相。
关键字: 镁； Mg-Al合金； 晶粒细化； Al-Ti-C中间合金
（1. Key Laboratory of Liquid Structure and Heredity of Materials,
Ministry of Education, Shandong University, Ji＇nan 250061, China;
2. Shandong Feixian Yingguang Magnesium Co Ltd,
Feixian 273400, China）
Abstract:A special Al-Ti-C master alloy was prepared to refine the grains of Mg-Al alloys. The results show that the Al-Ti-C master alloy has an effective grain refinement for Mg-Al alloy. The corrosion resistance of AZ61 increases greatly, after refined by Al-Ti-C master alloy. It is the duplex of Al4C3 and TiC that serves as the nuclei of α(Mg) during solidification.
Key words: Mg; Mg-Al alloy; grain refinement; Al-Ti-C master
