Research on the control of inclusions in the vacuum induction melting process of GH4169

LI Jing; ZHOU Yang; JIANG Shichuan

doi:10.7513/j.issn.1004-7638.2025.01.021

Volume 46 Issue 1

Feb. 2025

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LI Jing, ZHOU Yang, JIANG Shichuan. Research on the control of inclusions in the vacuum induction melting process of GH4169[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(1): 152-157. doi: 10.7513/j.issn.1004-7638.2025.01.021

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LI Jing, ZHOU Yang, JIANG Shichuan. Research on the control of inclusions in the vacuum induction melting process of GH4169[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(1): 152-157. doi: 10.7513/j.issn.1004-7638.2025.01.021

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Research on the control of inclusions in the vacuum induction melting process of GH4169

doi: 10.7513/j.issn.1004-7638.2025.01.021

LI Jing^{1, 2
,},
ZHOU Yang^{1, 2},
JIANG Shichuan^{1, 2}

1.
Chengdu Insititute of Advanced Metallic Material Technolgy and Industry Co.,Ltd., Chengdu 610000, Sichuan, China
2.
State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, Liaoning, China

Received Date: 2024-01-08
Publish Date: 2025-02-27

Abstract

Abstract

Inclusions in superalloys are the main factors affecting the metallurgical quality and performance of the alloys. The control methods of inclusions in the vacuum induction melting process of GH4169 had been investigated from two aspects: melting process and raw material. Firstly, three batches of GH4169 were melted in a 12-ton vacuum induction furnace with highly consistent charging but different refining temperature at 1530, 1560℃, and 1590℃. The results showed that as the refining temperature increased, the erosion-reduction reaction between the alloy melt and the MgO crucible became more intense, introducing non-metallic inclusions such as Al₂O₃ and MgAl₂O₄ into the alloy melt. The number density of non-metallic inclusions at the A-end of the induction ingot increased progressively, which were 83.716, 171.180/mm², and 204.927/mm², respectively. Therefore, low-temperature refining should be chosen to reduce inclusion content by more than 50%, with refining temperature at around 1525~1535℃, refining vacuum degree ≤ 1.0 Pa, and duration of 1.5~2.5 h. Secondly, low-temperature refining was selected to reduce the impact of refining process on inclusions, and the impact of raw material purity on inclusions was compared. The results showed that using higher purity raw materials such as Cr, Nb and Ti for melting can reduce inclusion content in the induction ingot by more than 30%.
- superalloys,
- vacuum induction melting,
- ASPEX,
- inclusion,
- purity

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References(13)

References

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