Superplastic heat treatment method for high-alloying nickel-based powder high-temperature alloy disc

• Main Authors: QU ZONGHONG, WANG ZEYU, LIU HAILANG, SONG JIAMING, LAI YUNJIN, ZHANG ANQIN, WANG QINGXIANG, LIANG SHUJIN, LUO CHENG
• Format: Patent
• Language: Chinese; English
• Published: 04.03.2022
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a superplastic heat treatment method for a high-alloying nickel-based powder high-temperature alloy disc. The superplastic heat treatment method comprises the following steps: firstly, obtaining a high-alloying nickel-based powder high-temperature alloy disc blank through a hot isostatic pressing technology; then rough machining and rounding are conducted; then, two times of solution treatment are carried out, on one hand, the size of a primary gamma phase playing a strengthening role on a grain boundary is increased, on the other hand, the supersaturation degree of an intragranular secondary gamma phase after solution treatment is reduced through secondary solution treatment, the nucleation density of the intragranular secondary gamma phase is reduced, the elastic strain energy is increased, and therefore the secondary gamma phase is controlled to grow into a rounded square; and finally, through two times of aging treatment, the type and number of carbides are controlled, gamma phases