电子束表面超快速熔凝冷却速率对形成非晶层的影响  

Effect of the Cooling Rate During Electron Beam Surface Rapid Solidification Treatment on the Formation of Amorphous Layer

作　　者：胡传顺[1] 陈晓风[1] 孙长义[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《石油化工高等学校学报》1997年第4期52-54,58,共4页Journal of Petrochemical Universities

基　　金：国家自然科学基金

摘　　要：为探索制备大面积表面非晶层的新途径，采用电子束表面超快速熔凝处理的方法，通过显微硬度、金相组枳和Ｘ射线衍射及透射电镜分析，研究了电子束表面超快速熔凝冷却速率对形成非晶层的影响。结果表明，电子束与基体的交互作用时间愈短，加热和冷却速率愈大。随冷却速率增大凝固组织细化，熔凝层显微硬度增大。当冷却速率为３．３４×１０７℃／ｓ时，即可获得可检测的非晶层。为一般结构材料的表面直接转变为非晶层开辟了新途径。In order to find a new way to prepare large area surface amorphous layers, electron beam super-rapid solidification treatment is employed. By means of micro-hardness, metallography, X-ray diffraction as well as TEM, the effect of cooling rate on amorphous layer during electron beam rapid solidification treatment is studied. The results show that the shorter the interaction times between electron beam and matrix, the larger the heating and cooling rate. With the increase of cooling rate, fine solidified structures are obtained. When cooling rate is 3.34×107℃/s, for the first time the amorphous layer in Ti alloy is obtained. This research established a new way by which the surface of conventional crystalline structure materials can be directly transform into amorphous layers.

关 键 词：电子束 表面熔凝 非晶层 非晶态合金 热处理 

分 类 号：TG166.799[金属学及工艺—热处理]