Abstract: The present disclosure provides a heat treatment method for realizing grain boundary serration in a nickel-based superalloy forging, including introducing a serrated grain boundary into a microstructure of a nickel-based superalloy forging by using a heat treatment method for controlling a cooling rate; the heat treatment method for controlling cooling speed includes the following steps: step S1: holding the nickel-based superalloy forging for 0.5-4 h at 1,050-1,200° C.; step S2: cooling the nickel-based superalloy forging to 650-800° C. at a preset cooling rate, and holding for 1-8 h, where the preset cooling rate is 1-20° C./min; and step S3, taking out and cooling the nickel-based superalloy forging to room temperature with water. The heat treatment method for realizing grain boundary serration in a nickel-based superalloy forging provided by the present disclosure can realize the grain boundary serration in the nickel-based superalloy forging.

Abstract: The present disclosure provides a heat treatment method for realizing grain boundary serration in a nickel-based superalloy forging, including introducing a serrated grain boundary into a microstructure of a nickel-based superalloy forging by using a heat treatment method for controlling a cooling rate; the heat treatment method for controlling cooling speed includes the following steps: step S1: holding the nickel-based superalloy forging for 0.5-4 h at 1,050-1,200° C.; step S2: cooling the nickel-based superalloy forging to 650-800° C. at a preset cooling rate, and holding for 1-8 h, where the preset cooling rate is 1-20° C/min; and step S3, taking out and cooling the nickel-based superalloy forging to room temperature with water. The heat treatment method for realizing grain boundary serration in a nickel-based superalloy forging provided by the present disclosure can realize the grain boundary serration in the nickel-based superalloy forging.