Effect of cobalt on solidification microstructure and segregation of K4169 superalloy

	Effect of cobalt on solidification microstructure and segregation of K4169 superalloy
	Li, Ya-Min; Liu, Hong-Jun; Liu, Jie; An, Bei; Hao, Yuan
	2010-08-01
发表期刊	Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology
ISSN	10001646
卷号	32 期号:4 页码:385-389
摘要	In order to investigate the effect of cobalt on the solidification process of K4169 superalloy, a manual electric arc furnace was used for preparing the superalloy with different cobalt content from 0.5% to 0.8%. The solidification microstructure and segregation were observed by SEM, EDS and EPMA. The results of SEM observation show that cobalt significantly promotes the formation of Laves phase and reduces the interdendritic segregation area. With increasing the Co content from 0.5% to 0.8%, the morphology of Laves phase changes from small block shape to mesh structure, and the amount of Laves phase increases considerably. The EDS and EPMA analyses show that cobalt can lower the solubility of Nb in the matrix. At the same time, cobalt can decrease the solubility of Fe and Cr in Laves phase, while increase the solubility of Nb, Mo and Ti in Laves phase. Therefore, it can be thought that cobalt promotes the precipitation of Laves phase. The analysis shows that the excessive increase of the Co content has little effect in improving the solidification microstructure of the K4169 alloy.
关键词	Cobalt Electric arcs Electric furnaces Microstructure Morphology Niobium Segregation (metallography) Solidification Solubility Superalloys Cobalt content Electric arc furnace Interdendritic segregation Laves-phase Mesh structures SEM observation Solidification microstructures Solidification process
收录类别	EI
语种	中文
出版者	Shenyang University of Technology
EI入藏号	20104213309282
EI主题词	Cobalt alloys
EI分类号	531 Metallurgy and Metallography - 531.2 Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 701.1 Electricity: Basic Concepts and Phenomena - 801.4 Physical Chemistry - 802.3 Chemical Operations - 951 Materials Science
来源库	Compendex
分类代码	531 Metallurgy and Metallography - 531.2 Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 701.1 Electricity: Basic Concepts and Phenomena - 801.4 Physical Chemistry - 802.3 Chemical Operations - 951 Materials Science
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/111499
专题	材料科学与工程学院国际教育学院
作者单位	Key Laboratory of Non-Ferrous Metal Alloys and Processing of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Li, Ya-Min,Liu, Hong-Jun,Liu, Jie,et al. Effect of cobalt on solidification microstructure and segregation of K4169 superalloy[J]. Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology,2010,32(4):385-389.
APA	Li, Ya-Min,Liu, Hong-Jun,Liu, Jie,An, Bei,&Hao, Yuan.(2010).Effect of cobalt on solidification microstructure and segregation of K4169 superalloy.Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology,32(4),385-389.
MLA	Li, Ya-Min,et al."Effect of cobalt on solidification microstructure and segregation of K4169 superalloy".Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology 32.4(2010):385-389.