摘要
采用不同的抽拉工艺制备DD6单晶合金,分析了DD6单晶合金的显微组织,研究了不同抽拉工艺对DD6合金组织的影响。结果表明,随着抽拉速率的降低,DD6合金一次枝晶间距增加,枝晶干和枝晶间γ′相尺寸变大,共晶组织呈粗化趋势,γ-γ′共晶组织含量减少,合金中主要元素偏析程度减轻。
The effect of withdrawing rate on microstructure of single crystal superalloy DD6 was investigated.The results show that,with the decreasing of withdrawing rate,the primary dendrite arm spacing increases,the size of γ′ phase in the dendrite core and in the interdendrite increases slightly,the volume fraction of γ-γ′eutetic decreases,and the segregation of main elements decreases.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2010年第11期8-10,16,共4页
Journal of Materials Engineering
关键词
单晶高温合金
抽拉速率
组织
single crystal superalloy
withdrawing rate
microstructure
