Aim\ To study the distribution and the concentration change of alloying elements in each precipitated phase of GH9158 alloy. Methods\ The methods of extraction and quantitative analysis of the precipitates are used. Results\ The nature

quantity and composition of the precipitates subjected to different temperature aging have been detected and analyzed. Conclusion\ The M\-6C and laves phases remain stable at (720~820) ℃ aging.