Method for producing large-specification Ti55531 alloy pancake
A ti55531, large-scale production technology, applied in the field of titanium alloy forging, can solve the problems of difficulty in obtaining uniform, high fracture toughness, large deformation resistance, etc., achieve good mechanical properties matching, reduce anisotropic difference, and ensure the effect of material strength
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[0043] Example two (Φ1200mm*600mm cake blank)
[0044] Step 1. Billet forging:
[0045] Use an electric furnace to heat the Φ650~780mm Ti55531 ingot to 300℃ above the β phase transition temperature and keep it for 1500min. After the end, use an 80MN fast forging machine to perform one-shot three-upsetting and three-drawing forging, requiring uniform upsetting, and the upsetting rate is controlled at 10~20mm / s, the upsetting deformation is controlled within 40~50% to break the original as-cast structure;
[0046] Step 2. Intermediate forging:
[0047] Step 2.1. The Ti55531 forging blank completed in step 1 is forged at 300°C above the β phase transition temperature for 4 fires, two upsetting and two draw forging, which includes 2 fires reversing upsetting, and the deformation amount of single fire upsetting is controlled At 40~45%, the upsetting rate is controlled at 10~20mm / s;
[0048] Step 2.2. The forging blank obtained in step 2.1 is subjected to two-fire upsetting forging at 30~50...
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