Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting

doi:10.1016/j.vacuum.2020.109521

CORC > 金属研究所 > 中国科学院金属研究所

	Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting
	Qian, Kun 1,2; Chen, Bo 1,2; Zhang, Long 2; Du, Zhanhui 2; Liu, Kui 1,2
刊名	VACUUM
	2020-09-01
卷号	179 页码:11
关键词	Kinetics IN718 alloy Nitrogen removal Reaction order
ISSN号	0042-207X
DOI	10.1016/j.vacuum.2020.109521
通讯作者	Chen, Bo(bchen@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn)
英文摘要	The kinetics of nitrogen removal from the molten IN718 alloy has been investigated by the sampling method under reduced pressure. The effects of initial nitrogen concentrations, alloying elements (carbon, titanium, and aluminum), and the intensity of inductive stirring on the nitrogen removal are discussed in the temperature range from 1773 to 1923 K. Experimental results indicate that the nitrogen removal is a 1.5th-order reaction at different initial nitrogen concentrations and temperatures, and the nitrogen removal reaction is controlled by a mixed interfacial and diffusion process. Moreover, the nitrogen removal reaction can be accelerated when the [C]+[O] = CO(g) reaction exists in the melt, and the kinetics changes gradually from a 1.5th-order reaction to a second-order reaction with increasing temperature from 1773 to 1873 K. The nitrogen removal is a second-order reaction in low-speed stirring. Meanwhile, the rate constant of nitrogen removal under the condition of where the mass transfer resistance in the gas phase is negligible, is evaluated. The rate constant of the nitrogen removal increases with increasing temperature. It is also found that titanium decreases the rate constant of nitrogen removal, and aluminum and carbon significantly increase the rate constant of nitrogen removal.
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000557782200045
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140156]
专题	金属研究所_中国科学院金属研究所
通讯作者	Chen, Bo; Liu, Kui
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Qian, Kun,Chen, Bo,Zhang, Long,et al. Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting[J]. VACUUM,2020,179:11.
APA	Qian, Kun,Chen, Bo,Zhang, Long,Du, Zhanhui,&Liu, Kui.(2020).Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting.VACUUM,179,11.
MLA	Qian, Kun,et al."Kinetics study of nitrogen removal from liquid IN718 alloy during vacuum induction melting".VACUUM 179(2020):11.