真空条件下Nd对AZ31变形镁合金的影响  

Influence of Vacuum Melting on AZ31 Magnesium Alloy

作　　者：李明照[1] 张俊远[1] 王晓敏[1] 王社斌[1] 许并社[1] 

机构地区：[1]太原理工大学,山西太原030024

出　　处：《稀有金属材料与工程》2007年第9期1689-1692,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金重大研究计划(90306014);国家自然科学基金(20271037;20471041);国家自然科学基金国际合作项目(50311140138)

摘　　要：研究真空条件下,在重熔AZ31镁合金的过程中添加Mg-Nd中间合金,分析真空熔炼合金中夹杂物的成分及Nd的吸收率,观察其微观组织,对析出相进行分析,与不含Nd的AZ31进行比较,并着重讨论了提高其力学性能的途径。结果表明:真空熔炼降低了夹杂物含量,使合金显现出本身的特性;添加Mg-Nd中间合金后生成新相Al2Nd和Mg12Nd细化了晶粒,使合金的力学性能得到较大改善。In the process of vacuum melting AZ31 magnesium alloy, Nb powder and Mg-Nd intermediate alloy were added, respectively. The composition of inclusion and absorptivity of Nd in magnesium alloy were measured. The microstructure was observed, the precipitating phases were identified, and the approaches of increasing the mechanical properties of magnesium alloy were dicussed. The results show that amount of inclusion was decreased under vacuum condition. The absorptivity of Nd upon adding Mg-Nd intermediate alloy was higher than that upon adding Nd powder, simultaneously, new phases NdAl2 and Mg12Nd were formed, which fined grains and improved the mechanical properties of the alloy.

关 键 词：真空熔炼 镁合金 夹杂物 ND 力学性能 

分 类 号：TF822[冶金工程—有色金属冶金]