抽拉速率对DD6单晶高温合金凝固组织的影响

Effect of Withdrawing Rate on Solidification Microstructure of Single Crystal Superalloy DD6

研究了不同的抽拉速率对第二代单晶高温合金DD6凝固组织的影响。结果表明,随抽拉速率的增加,DD6合金凝固界面由粗枝状组织向细枝状组织演变,枝晶干和枝晶间的γ′相尺寸减小,且枝晶间γ′相的形状越来越趋向于规则的立方体形状,γγ-′共晶含量增加,粗大的初生γ′相减少。

The effect of withdrawing alloy DD6 was investigated. The re phology of liquid-solid interface of size of the γ′ phase particles decrea fraction of γ-γ′ eutectic increases an tectic decreases ngle crystal super ing rate, the mor fine de cubic, ipitates ndrite, the the volume in γ-γ eutectic decreases.