Preparation method of Ce-containing cast ingot for improving purity of high-temperature alloy for ultra-supercritical thermal power generating unit

• Main Authors: FU BAOQUAN, YUAN YONG, LIU PENG, ZHANG JIANWEI, ZHANG LIXIANG, LI ZHIXING, CAO GUOXIN, HE YONGSHENG, YAN JINGBO
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a preparation method of a Ce-containing cast ingot for improving purity of a high-temperature alloy for an ultra-supercritical thermal power generating unit, the Ce-containing cast ingot comprises the following materials: Ni, C, Fe, Mo, a NiW alloy, Co, Cr, a NiCe alloy, Al, Ti and a NiB alloy, and the preparation method comprises the following steps: S1, burdening: weighing alloy materials according to component requirements of the high-temperature alloy cast ingot for the ultra-supercritical thermal power generating unit; s2, vacuum induction melting: 2.1, in the initial melting stage, Ni, C, Fe, Mo, NiW alloy, Co and Cr alloy materials are sequentially put into a furnace, vacuumizing is carried out, the power is increased to the full melting temperature, and the raw materials are dissolved and clarified; 2.2, a degassing period: increasing the power to a refining temperature, vacuumizing to keep a high vacuum degree in the vacuum induction furnace for a certain time, and applying el