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
Cite this article as:
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
Research Article

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

+ Author Affiliations
  • Corresponding authors:

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

    Hu Zhang    E-mail: zhanghu@buaa.edu.cn

  • Received: 15 October 2017Revised: 31 January 2018Accepted: 12 February 2017
  • 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.
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