Effect of cooling mode on microstructure and properties of solution treated Inconel X-750 alloy

doi:10.13251/j.issn.0254-6051.2020.01.021

Abstract

Abstract: SEM, TEM, EDAX and phase analysis were used to study the changes of microstructure and properties of Inconel X-750 alloy after solid solution with different cooling mode. The results show that the water cooling and oil cooling inhibit γ′ precipitation, however spherical γ′ is precipitated after aging. After the furnace cooling, a cubic γ′ and a secondary spherical γ′ are precipitated in the alloy, and the spherical γ′ is precipitated again after aging. There is no carbide precipitation on the grain boundary after water cooling and oil cooling, fine needle-like M ₂₃ C ₆ precipitates on the grain boundary after aging. The block M ₂₃ C ₆ precipitates on the grain boundary of the alloy after furnace cooling. The carbide size grows slightly and the shape is basically unchanged after aging; the strength of the alloy is the highest after furnace cooling+aging, and the impact property of the alloy is the best after water cooling+aging.

Key words: Ni-based superalloy, solution cooling mode, γ′ phase, carbide, properties

CLC Number:

TG156

Zhang Yahui, Wang Limin, Hu Ri. Effect of cooling mode on microstructure and properties of solution treated Inconel X-750 alloy[J]. HTM, 2020, 45(1): 105-111.

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