Mechanisms of reactive element Y on the purification of K4169 superalloy during vacuum induction melting

Qing-ling Li; Hua-rui Zhang; Ming Gao; Jin-peng Li; Tong-xiao Tao; Hu Zhang

doi:10.1007/s12613-018-1617-4

Volume 25 Issue 6

Jun. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(6): 696-703

Qing-ling Li, Hua-rui Zhang, Ming Gao, Jin-peng Li, Tong-xiao Tao, and Hu Zhang, Mechanisms of reactive element Y on the purification of K4169 superalloy during vacuum induction melting, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 696-703. https://doi.org/10.1007/s12613-018-1617-4

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Qing-ling Li, Hua-rui Zhang, Ming Gao, Jin-peng Li, Tong-xiao Tao, and Hu Zhang, Mechanisms of reactive element Y on the purification of K4169 superalloy during vacuum induction melting, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 696-703. https://doi.org/10.1007/s12613-018-1617-4

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Research Article

Mechanisms of reactive element Y on the purification of K4169 superalloy during vacuum induction melting

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Corresponding authors:
Hua-rui Zhang E-mail: huarui@buaa.edu.cn

Hu Zhang E-mail: zhanghu@buaa.edu.cn
Received: 15 October 2017; Revised: 31 January 2018; Accepted: 12 February 2017

Abstract

Abstract

The effects of rare earth element Y on the purification of K4169 superalloy during vacuum induction melting were investigated at different superheating temperatures. The corresponding interaction mechanisms were also clarified. Results showed that the addition of Y remarkably promoted the purification effect on the K4169 melt. The contents of O and S in the K4169 as-cast alloy ingots after purification were 3–4 and 8–10 ppm, respectively. The degrees of deoxidation and desulfurization increased to 50% and 57%, respectively, upon the addition of 0.1wt% Y. The yttrium-rich phase that precipitated at the grain boundary blocked the diffusion of C and the accumulation of S, thereby contributing to the purification of the alloy.
- K4169 superalloy;
- deoxidation;
- desulfurization;
- yttrium;
- vacuum induction melting;
- mechanism

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