GH4169 high-temperature alloy bar and manufacturing method thereof

The invention discloses a GH4169 high-temperature alloy bar. The specification of the bar is phi 200-300 mm, the flaw detection level of the bar is not smaller than phi 1.2-9 dB, and the grain size is at the level 6 to the level 8. The invention further discloses a manufacturing method for the GH4169 high-temperature alloy bar. The method includes the steps that billet forging of the first heating number is carried out on a GH4169 ingot which is subjected to homogenizing heat treatment, and the ingot is subjected to two-upsetting and one-drawing processes; an obtained billet is subjected to reversing upsetting-drawing forging of the second and third heating numbers; drawing-out forging of the fourth and fifth heating numbers is carried out; and then chamfering and rolling forging of the sixth and seventh heating numbers is carried out to obtain the GH4169 high-temperature alloy bar. By means of the manufacturing method, the structure homogeneity of the bar is effectively improved, and the flaw detection level of the bar with the specification being phi 200-300 mm is made to reach more than phi 1.2-9 dB; after the bar is subjected to heat treatment, the macrostructure is uniform, and the grain size reaches the level 6 to the level 8; meanwhile, the performance of the large-specification bar subjected to standard heat treatment can meet corresponding standard requirements.