Smelting process of high-niobium high-temperature alloy large-size ingot and high-niobium high-temperature alloy large-size ingot

• Main Authors: ZHANG BEIJIANG, DUAN RAN, LI LIANPENG, ZHAO GUANGPU, CHOU YINGYU, QI CHAO, HUANG SHUO, QIN HEYONG
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2020
• 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 smelting process of a high-niobium high-temperature alloy large-size ingot and the high-niobium high-temperature alloy large-size ingot. The problems that metallurgical defects of black spots and white spots are formed by anabatic segregation due to expansion of diameter or weight of the high-niobium high-temperature alloy large-size ingot, steel ingots are exploded due to large heat stress and the weight of the steel ingots cannot be increased due to the tonnage restriction of vacuum induction melting equipment are solved. The smelting process comprises the steps that that vacuum induction melting is carried out, a plurality of vacuum induction ingots with the same component are prepared, then electroslag electrodes with the same number are prepared, exchanging electroslag remelting is carried out, then prepared electroslag ingots are used for preparing consumable electrodes, and then the consumable electrodes are used as initial raw materials to perform multiple vacuum consumable r