Preparation method of high-alloying aluminum alloy large-specification cast ingot

• Main Authors: WANG FENGCHUN, ZHANG XIANGBIN, LI YIMENG, LIU XIANDONG, TONG YOUZHI, LI XINBIN, REN WEICAI, WU YIZHE, TAN YIZHE, KONG XIANGSHENG
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2023
• Subjects: ALLOYS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; 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 high-alloying aluminum alloy large-specification cast ingot, and belongs to the technical field of aerospace material preparation. The method solves the problems that an existing 7xxx aluminum alloy large-specification cast ingot is poor in metallurgical quality, small in cast ingot specification and insufficient in deformation of a rolled super-thick plate, and consequently the comprehensive performance of the plate does not reach the standard. The method comprises the following steps: 1, burdening and smelting; secondly, refining purification, online two-stage degassing and two-stage filtering are sequentially conducted, casting is conducted, a refiner is added in a point mode, and a large-specification 7xxx alloy ingot blank is obtained; and 3, performing surface milling and saw cutting after homogenizing heat treatment. The large-sized cast ingot meets the requirement for the metal amount of a finished plate with the full size of 120mm * 1500mm * 18000mm,