Effect of Pouring System on Microstructure and Properties of K4750 Alloy

doi:10.12442/j.issn.1002-185X.20220815

IMR OpenIR

	Effect of Pouring System on Microstructure and Properties of K4750 Alloy
	Zhao Pengfei 1,2; Wang Min 1; Ou Meiqiong 1; Ma Yingche 1; Liu Kui 1
通讯作者	Wang Min(minwang@imr.ac.cn)
	2023-11-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	52 期号:11 页码:3809-3817
摘要	K4750 alloy is a new cast nickel-based superallos Abstrxcellent mechanical properties at 700-750 degrees C and is expected to replace K4169 alloy. However, the tensile plasticity of K4750 alloy n temperature fluctuates, and the relationship among room temperature tensile properties, solidification microstructure, and casting3 meters is still unclear for this alloy. In this work. Kwds K4750 alloy test bars were prepared with various casting temperatures and shell cooling conditions, and tested at room temperat Juniaxial tension. Sensitivity of the alloy's room temperature tensile properties to changes in casting temperature and shell cooling 13 as evaluated, and the mechanism was elucidated by microstructure characterization Results show that the grain size of alloy drops significantly with decreasing casting temperature, and the yield strength of the alloy slightly increases while the plasticity remains stable. When the cooling rate of the shell decreases, the fracture elongation of the alloy decreases significar room temperature. This is mainly because the cooling condition of mold shell significan Addrets the precipitation characteristic Auth c carbides. When the cooling rate is low, MC carbides tend to precipitate at grain bound n coarse and strip-like shapes. A13 ides are prone to internal cracks under stress, accelerating the intergranular failure of m13 and reducing the plasticity of alloy order to optimize the tensile properties of K4750 alloy at room temperature, more attention should be paid to the cooling rate of mold shell after casting and the precipitation morphology of intergranular carbides, prohibiting the formation of coarse intergranular carbides to improve the grain boundary plasticity of the alloy.
关键词	K4750 alloy casting process mechanical property carbide grain boundary
DOI	10.12442/j.issn.1002-185X.20220815
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001127308200017
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183818
专题	中国科学院金属研究所
通讯作者	Wang Min
作者单位	1.Chinese Acad Sci, Inst Met Res, Shicchangxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao Pengfei,Wang Min,Ou Meiqiong,et al. Effect of Pouring System on Microstructure and Properties of K4750 Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2023,52(11):3809-3817.
APA	Zhao Pengfei,Wang Min,Ou Meiqiong,Ma Yingche,&Liu Kui.(2023).Effect of Pouring System on Microstructure and Properties of K4750 Alloy.RARE METAL MATERIALS AND ENGINEERING,52(11),3809-3817.
MLA	Zhao Pengfei,et al."Effect of Pouring System on Microstructure and Properties of K4750 Alloy".RARE METAL MATERIALS AND ENGINEERING 52.11(2023):3809-3817.