摘要
采用梯度热处理工艺制备了具有梯度组织结构的FGH96合金亚尺寸盘坯,对盘坯存在的残留枝晶区组织进行了研究。结果表明,残留枝晶区实质上是一种γ’相未完全再结晶的组织区,其呈区域性不均匀的分布于盘芯部位。残留枝晶区的形成与粉末颗粒冷凝组织的遗传性及未充分变形再结晶密切相关,通过采用合适的热加工和固溶热处理工艺可以消除这种组织不均匀性。
The subscale FGH96 alloy disk with the gradient microstructure was prepared using gradient heat treatment. Microstructure characterization of residual dendrite zones was investigated. The results show that, the residual dendrite zone of FGH96 alloy disk is an incomplete recrystallization zone where γ’ phases exhibit the uneven distribution in disk core. The formation of residual dendrite zone is closely related to the solidification heredity of powder particles and incomplete deformation recrystallization, the inhomogeneity in residual dendrite zone can be eliminated by the suitable hot working and solution heat treatment.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2018年第6期403-408,共6页
Powder Metallurgy Technology
关键词
梯度组织
粉末高温合金
残留枝晶区
再结晶
γ’相
gradient microstructure
powder metallurgy superalloy
residual dendrite zone
recrystallization
γ’ phases
