A new method of fine grained casting for nickle-base superalloys
详细信息 查看全文
- 作者：Liu ; Lin ; Zhang ; Rong ; Wang ; Liuding ; Pang ; Shuxian ; Zhen ; Baolin
- 关键词：Superalloy ; Grain refinement ; Solidification
- 刊名：Journal of Materials Processing Technology
- 出版年：1998
- 出版时间：May 1, 1998
- 年：1998
- 卷：77
- 期：1-3
- 页码：300-304
- 全文大小：468 K
文摘
The grain structures and microscopic features of a nickle-base Inconel 738LC were examined under various melting and casting conditions. Results show that the gain size of the γ matrix is reduced significantly by a treatment of lowing melt superheat temperature (LMST). By the addition of a trace intermetallic compound A1xNiy to the melt together with LMST treatment, a remarkable refinement could be obtained. The grain size over the whole section of castings could be refined to 0.5–0.8 mm, i.e. to ASTM grain size M11–12. In addition, the size of primary MC carbides in the alloy is reduced. The secondary dendrite arm spacing and phase constitution of the alloy are less sensitive to the additions.