ZL205A合金大型铸件带状偏析组织对力学性能的影响  

Influence of Zonal Segregation on Mechanical Properties of Large ZL205A Alloy Castings

作　　者：李玉胜[1] 翟虎[2] 王涛[2] 马志毅[2] 冯志军[2] 曲选辉[1] 

机构地区：[1]北京科技大学,北京100083 [2]沈阳铸造研究所,辽宁沈阳110022

出　　处：《铸造》2008年第3期219-222,共4页Foundry

摘　　要：介绍了ZL205A合金大型铸件中的一种宏观带状偏析缺陷的形貌,分析了带状偏析最严重区域的组织对力学性能的影响,观察了试棒断口形貌,并分析了断口处偏析组织的化学成分。研究发现,ZL205A合金带状偏析组织使该区域力学性能降低,造成力学性能低的原因是带状偏析组织中Cu量偏高且聚集在晶界位置,形成了晶间脆性相。The macroscopic appearance of zonal segregation in large ZL205A castings was observed, and then the influence of zonal segregation on the mechanical properties and the composition in segregation zone were analyzed, It was found that the reason for zonal segregation making the mechanical properties drop was that the Cu content in segregation zone was higher than that in matrix and the higher cu aggregated at the grain boundary, forming brittle Dhases.

关 键 词：ZL205A铸件 偏析 力学性能 

分 类 号：TG136.1[一般工业技术—材料科学与工程]