电子束表面熔凝处理钛镀镍合金的组织与溶质浓度分布  

Microstructure and Solute Concentration Distribution of Solidified Layer in Electron Beam Surface Solidification Treating Ni-Plated Ti Alloy

作　　者：胡传顺[1] 陈晓风[2] 孙长义[2] 

机构地区：[1]抚顺石油学院,辽宁抚顺113001 [2]中国科学院金属研究所,辽宁沈阳110015

出　　处：《金属热处理》2000年第3期11-12,40,共3页Heat Treatment of Metals

基　　金：国家自然科学基金!(595710 4 8)

摘　　要：采用高能量密度电子束进行了钛镀镍合金表面熔凝处理的研究。借助于光学显微镜、扫描电镜和EDS能谱分析等方法研究了熔凝层显微组织和溶质浓度分布。结果表明 :钛镀镍表面合金层经电子束表面熔凝处理后 ,熔凝层组织发生了明显的变化 ,大部分凝固组织为细小的等轴晶 ,而沿基体进行的非均质形核造成的联生长大倾向不明显。因熔凝层冷却速度较快 ,熔凝层溶质原子过饱和度增大 ,但熔凝层的溶质浓度分布趋于均匀化。WT5”BZ][ST5”BZ]High energy density electron beam is employed in surface rapid solidification on Ni plated Ti alloy.The microstructure and solute concentration distribution of solidified layers is studied by means of optical microscope,SEM and EDS analysis methods.The result shows that microstructure in solidified layer changes much when treated by electron beam surface solidification,large part of crystalline microstructure becomes finer equiaxed grain.The tendency that columnar grain grows along substrate is confined.Because of fast cooling rate,the solute atom saturation concentration increases.However the solute chemical composition concentration distributions in solidified layer incline to be uniform.[HT5”H]

关 键 词：电子束表面熔凝 钛镀镍合金 溶质浓度分布 组织 

分 类 号：TG174.445[金属学及工艺—金属表面处理]