| 梯度组织FGH96合金残留枝晶区的组织特征研究 |
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| 引用本文： | 田高峰,陈阳,汪煜.梯度组织FGH96合金残留枝晶区的组织特征研究[J].粉末冶金技术,2018,36(6):403-408. |
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| 作者姓名： | 田高峰 陈阳 汪煜 |
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| 作者单位： | 北京航空材料研究院先进高温结构材料重点实验室，北京 100095 |
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| 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。
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| 关 键 词： | 梯度组织 粉末高温合金 残留枝晶区 再结晶 γ′相 |
| 收稿时间： | 2018-05-13 |
Research on microstructure characterization in residual dendrite zones of FGH96 alloy with gradient microstructure |
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| Affiliation: | Science and Technology on Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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| Abstract: | 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. |
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