Study on as-cast microstructure and homogenization of wrought superalloy GH4065A

Shui Lang

doi:10.7513/j.issn.1004-7638.2021.04.022

Volume 42 Issue 4

Aug. 2021

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Shui Lang. Study on as-cast microstructure and homogenization of wrought superalloy GH4065A[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 131-137. doi: 10.7513/j.issn.1004-7638.2021.04.022

Citation:

Shui Lang. Study on as-cast microstructure and homogenization of wrought superalloy GH4065A[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 131-137. doi: 10.7513/j.issn.1004-7638.2021.04.022

Shui Lang. Study on as-cast microstructure and homogenization of wrought superalloy GH4065A[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 131-137. doi: 10.7513/j.issn.1004-7638.2021.04.022

Citation:

Shui Lang. Study on as-cast microstructure and homogenization of wrought superalloy GH4065A[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 131-137. doi: 10.7513/j.issn.1004-7638.2021.04.022

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Study on as-cast microstructure and homogenization of wrought superalloy GH4065A

doi: 10.7513/j.issn.1004-7638.2021.04.022

Shui Lang^{1, 2
,}

1.
Chengdu Institute of Advanced Metallic Material Technology and Industry Co., Ltd., Chengdu610300, Sichuan, China
2.
State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009，Liaoning, China

Received Date: 2021-06-21
Publish Date: 2021-08-10

Abstract

Abstract

The as-cast microstructure of the samples from multiple locations of an ESR ingot of superalloy GH4065A had been characterised by SEM and DSC, and then evolution of microstructure and residual segregation index of the samples treated under a variety of designed homogenization schemes had been investigated. The results show that γ-γ’ eutectic phase, borides and TiN are the major precipitated phases in the as-cast microstructure of GH4065A. Ti, Nb, Mo and W are the major segregated elements. After homogenization at 1 160 ℃ for 10 h, the precipitated phases mostly dissolves and residual segregation index of Ti, Nb, Mo reduces down to about 0.2, and index of W down to 0.4, which demonstrates homogenization at 1 160 ℃ for 10 h is reasonable treatment condition. Due to the large scale of ingots in industrial production, it is acceptable to immerse the ingot in the furnace of 1 160 ℃ for 20 h to achieve homogenization.
- wrought superalloy,
- homogenization,
- microstructure,
- segregation characteristics

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References(14)

References

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