Smelting process of TC25 titanium alloy super-large-diameter cast ingot

• Main Authors: MIN XINHUA, CHEN HAI, SHI LEI, ZHANG ANQIN, JI BO
• Format: Patent
• Language: Chinese; English
• Published: 23.05.2023
• Subjects: 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 TC25 titanium alloy super-large-diameter cast ingot, which comprises the following steps: preparing a mother electrode: mixing sponge titanium and binary or multi-element intermediate alloy containing Mo, W, Zr and Sn to prepare an electrode with the diameter phi of 530-550mm * L, and the density of the electrode reaches 3.3-3.7 g/cm < 3 >; rotating and uniformly mixing, then putting into a mold, and compacting in an oil press with a certain tonnage to reach the specified density; the current is 15500 to 16500 A, the voltage is 33 to 35 V, and the melting speed is 12 to 14 Kg/min; smelting to be phi 640 to 680 mm * L; secondary ingot smelting: the current is 22000 to 24000A, the voltage is 35 to 37V, and the melting speed is 14 to 16Kg/min; smelting to be phi 740 to 780 mm * L; the current is 29000 to 31000 A, the voltage is 38 to 40 V, and the melting speed is 21 to 24 Kg/min; and smelting to obtain a product with the specification of phi 840-880mm * L. By adop