影响电磁约束定向生长样件表面质量的因素分析  

Some Factors Affecting the Surface Quality in Electromagnetic Confinement Process

作　　者：沈军[1] 蔡英文[1] 李建国[1] 傅恒志[1] 

机构地区：[1]西北工业大学

出　　处：《材料工程》1997年第3期16-19,共4页Journal of Materials Engineering

摘　　要：用相机拍摄记录了 Al- 2 % Cu合金在不同工艺条件下进行电磁约束定向凝固时 ,液柱头表面被氧化以及氧化皮形成皱褶的过程 ,并对此进行了分析。发现增大抽拉速度 ,减小液柱头最大厚度与最小厚度的比值 ,以及抑止电磁搅拌都能减小氧化和氧化皱褶的形成 ,最终改善表面质量。The oxidation and formation of oxide fold of Al- 2 % Cu alloy were recorded with a camera in electromagnetic confinement process under different conditions.By analysing those photographs,it was found that increasing the drawing speed,reducing the ratio of maximum thickness of liquid meniscus to its minimum thickness,and eliminating the electromagnetic stir all reduced the oxidation and formation of oxide fold,and therefore a good surface quality.

关 键 词：电磁约束 定向凝固 氧化皱褶 金属 

分 类 号：TG111.4[金属学及工艺—物理冶金]