Mg-Al-C中间合金对AZ91镁合金组织和性能的影响  

Effect of Mg-AI-C master alloy on the microstructure and mechanical properties of AZ91 Magnesium alloy

作　　者：黎业生[1] 付群强[1] 董定乾[1] 李洪[1] 

机构地区：[1]江西理工大学材化学院,江西赣州341000

出　　处：《材料热处理学报》2007年第B08期25-28,共4页Transactions of Materials and Heat Treatment

基　　金：江西省教育厅科技攻关项目(2004赣财教第18号);江西省科技厅科技计划项目(赣财教字[2006]188号)

摘　　要：通过真空烧结制备出Mg-Al-C中间合金,发现该合金可以有效地细化Mg-Al系AZ91合金的晶粒,细化后的AZ91合金力学性能显著提高,粗大且易于聚集成团的Mg_(17)Al_(12)相得以消除;分析认为其细化机制是在镁合金熔体中形成了大量的结晶形核质点Al_4C_3或Al-C-O化合物。A special Mg-Al-C master alloy was prepared by vacuum sintering to refine the grains of Mg-Al alloys. The results show that the Mg-Al-C master alloy has a remarkable refining effect on the grain size of AZ91 alloy. The mechanical properties of AZ91 alloy enhanced greatly after the addition of Mg-Al-C master alloy, coarse and easy-assembling Mg17Al12 phase disappeared. The refinement mechanism attributes to be the formation of large amount of nucleus of AhC3 or Al-C-O compounds in the solution of magnesium alloy.

关 键 词：镁合金 晶粒细化剂 Mg—Al-C中间合金 细化机理 

分 类 号：TG146[一般工业技术—材料科学与工程] TG232[金属学及工艺—金属材料]