Effects of Different Element Content on Precipitate Behavior of Precipitates in Haynes282 Alloy

Thermodynamic calculation was conducted on Haynes282 alloy by using JMatPro software, and then the content of different precipitates in the alloy from 1 400℃ to 600℃ was obtained. The effects of chromium, cobalt, molybdenum, titanium, aluminum, carbon and boron on the precipitate behavior of precipitates were analyzed. The results show that the precipitate amount of carbides was mainly determined by carbon content. Chromium could enhance the stability of M₂₃C₆. Chromium, cobalt, molybdenum, titanium and aluminum could promote the precipitation and stability of σ phase. The increase of molybdenum content could promote the precipitation of μ phase, while boron, cobalt, chromium, titanium and aluminum inhibited the precipitation of μ phase. Boron had no effect on the stability of M₃B₂, but the increase of content improved the precipitate amount. Titanium contributed to the precipitation and stability of γ' phase, and aluminum improved the precipitate amount of γ' phase.