A kind of forming method of cobalt-chromium-molybdenum superalloy bar
A forming method and superalloy technology are applied in the forming field of cobalt-chromium-molybdenum superalloy bars, which can solve the problems of unevenness, poor mechanical properties, coarse grains of bars, etc. The effect of uniform alloy composition
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Embodiment 1
[0020] A method for forming a cobalt-chromium-molybdenum superalloy rod: comprising the following steps
[0021] Using 250kg vacuum induction melting furnace, at 10 -1 Under the condition of vacuum degree above Pa, electrolytic cobalt, electrolytic chromium, and metal molybdenum are smelted into Φ180mm electrode ingots, and remelted in a 300kg electroslag furnace for the second time, and slag electroslag is added to form Φ260mm electroslag ingots, and argon gas protection is used. The components in the slag are calculated by mass percentage: CaF2: 55%, Al2O3: 20%, CaO: 20%, TiO2: 5%;
[0022] The electroslag ingot is homogenized in the electric furnace, and the temperature is raised to 1160±10°C with the furnace, kept for 16 hours, and air-cooled after being released from the furnace;
[0023] Heat the homogenized ingot to 1180±10°C for 150 minutes, then directly open the billet on the GFM-SX-32 precision forging machine, the initial forging temperature is about 1150°C, and t...
Embodiment 2
[0027] A method for forming a cobalt-chromium-molybdenum superalloy rod: comprising the following steps
[0028] The preparation method of the cobalt-chromium-molybdenum superalloy ingot is the same as above. The ingot of Φ260 is homogenized in the electric furnace, and the temperature is raised to 1200±10°C with the furnace, kept for 12 hours, and air-cooled after being released from the furnace.
[0029] Heat the homogenized ingot to 1180±10°C for 150 minutes, and then directly forge the billet on the GFM-SX-32 precision forging machine. The initial forging temperature is about 1150°C, and the final forging temperature is about 1000°C; the billet size is Φ80*L.
[0030] The precision forged billet is surface treated with a lathe or grinder to remove surface defects, heated to 1160±10°C, kept for 90 minutes, and then rolled in a 430 rolling mill. The initial rolling temperature is about 1130°C and the final rolling temperature is about 960°C ; Bar size Φ32*L.
[0031] Depe...
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