Large-size difficult-to-deform nickel-based superalloy cast ingot and preparation method thereof

• Main Authors: ZHANG WENYUN, DUAN RAN, TIAN QIANG, ZHAO GUANGPU, HAO YONGZHOU, CHOU YINGYU, QI CHAO, QIN HEYONG, HUANG SHUO, LEE SANG-JAE, SONG BIN, LIU NING, ZHU HONGTAO, ZHANG BEIJIANG, YANG LIANG, LIU MENG, LI LIANPENG, HUANG JIN, YANG YUJUN, LI ZHENTUAN, YU TENG, LIU JUNJIAN
• Format: Patent
• Language: Chinese; English
• Published: 24.06.2022
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a large-size difficult-to-deform nickel-based superalloy cast ingot and a preparation method thereof. The preparation method comprises the following steps: triple smelting: performing triple smelting on a superalloy raw material through vacuum induction smelting, protective atmosphere electroslag remelting and vacuum consumable remelting to obtain a consumable ingot; homogenization treatment: carrying out multi-section homogenization treatment, and carrying out heat preservation on the consumable ingot; raising the temperature and keeping the temperature; raising the temperature and keeping the temperature; and heating, preserving heat and then cooling to obtain the large-size difficult-to-deform nickel-based superalloy cast ingot. The invention further discloses the large-size difficult-to-deform nickel-based superalloy cast ingot prepared by the method. Through the method provided by the invention, the difficult-to-deform nickel-based superalloy with the specification of phi 660 mm c