摘要
采用OM、失重法和电化学等手段研究了稀土Sm（1.0%~2.0%）对含Y镁合金组织和耐腐蚀性的影响。结果表明,随Sm含量增加,合金中网状粗大的析出相组织枝晶断裂,逐渐转变为细小、弥散的颗粒状均匀分布,体积分数下降;当合金含Sm量在2.0%时,合金的网状相大部分消失,颗粒析出相增多,并产生粗化、偏聚现象。在50 g/L的NaCl溶液中,耐腐蚀性随Sm含量的增加先上升后下降,其中当Sm含量为1.5%时,该合金的耐蚀速率达到最低。同时探讨出合金在含Sm量为1.5%时,耐腐蚀性最好的可能原因,是α相中的Al分布均匀和稀土析出相弥散均匀分布。
Adopting OM,mass loss and electrochemical means,the effects of rare earth Sm（1.0%-2.0%） on the corrosion resistance of Y-containing magnesium alloy were researched.The results show that with the increase of the content of Sm,the precipitates microstructure in alloy mesh coarse fractures in dendrite,gradually transforms into small,uniform dispersion of particulate volume fraction decreases.However,when the amount of the alloy contains 2.0% Sm alloy,most of the mesh disappears,the particles precipitated phase increase,and generate coarsening,segregation phenomenon.In addition,in the 50 g/NaCl solution L,the corrosion resistance increases and then decreases with the content of Sm increasing.When Sm content is 1.5%,the corrosion resistant rate of the alloys is lowest.At the same time,the possible reason for the best corrosion resistance alloys with 1.5%Sm content is：Al evenly distributing in α phase and rare earth precipitating dispersely evenly.
出处
《热加工工艺》
CSCD
北大核心
2015年第6期77-80,共4页
Hot Working Technology
关键词
镁合金
SM
显微组织
耐腐蚀性
Mg alloy
Sm
microstructure
corrosion resistance
作者简介
杨晓禹（1989-），男，山东海阳人，硕士，主要研究方向为镁合金表面理技术：电话：15235181792；E-mail：yangxiaoyuguoying@foxmail．com
