Short-process preparation method for medium-strength and high-toughness titanium alloy medium-thickness plate
A tough titanium alloy and short-process technology, which is applied in the field of short-process preparation of medium-strength and high-toughness titanium alloy medium-thick plates, can solve the problems of low production efficiency, many times of forging, low fracture toughness, etc., to avoid excessive internal stress Larger, improved titanium alloy strength, and reduced processing costs
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Embodiment 1
[0040] This embodiment includes the following steps:
[0041] Step 1. Put 0 grade sponge titanium, Al-V master alloy, aluminum beans and TiO 2 The powder is mixed and pressed into a consumable electrode, and then the consumable electrode is subjected to three vacuum consumable smelting to obtain a Ti-6.3Al-4.2V-0.08O titanium alloy ingot with a diameter of 460 mm; the three vacuum consumable smelting During the process: the current of the first vacuum self-consumption smelting is 9kA, the vacuum degree is not greater than 4Pa, the current of the second vacuum self-consumption smelting is 14kA, the vacuum degree is not greater than 0.6Pa, the current of the third vacuum self-consumption smelting The melting voltage is 18kA, the vacuum degree is not greater than 0.6Pa, and the melting voltage is 30V to 35V in the three times of vacuum consumable melting; the mass fraction of Fe in the titanium alloy ingot is not greater than 0.02%, and the mass fraction of C is not greater than ...
Embodiment 2
[0057] This embodiment includes the following steps:
[0058] Step 1. Put 0 grade sponge titanium, Al-V master alloy, aluminum beans and TiO 2 The powder is mixed and pressed into a consumable electrode, and then the consumable electrode is subjected to three vacuum consumable smelting to obtain a Ti-6.2Al-4.05V-0.08O titanium alloy ingot with a diameter of 560 mm; the three vacuum consumable smelting During the process: the current of the first vacuum consumable smelting is 3kA, the vacuum degree is not greater than 4Pa, the current of the second vacuum consumable smelting is 18kA, the vacuum degree is not greater than 0.6Pa, the current of the third vacuum consumable smelting The melting voltage is 20kA, the vacuum degree is not greater than 0.6Pa, and the melting voltage is 30V to 35V in the three times of the vacuum consumable melting process; the mass fraction of Fe in the titanium alloy ingot is not greater than 0.02%, and the mass fraction of C is not greater than 0.01...
Embodiment 3
[0073] This embodiment includes the following steps:
[0074] Step 1. Put 0 grade sponge titanium, Al-V master alloy, aluminum beans and TiO 2 The powder is mixed and pressed into a consumable electrode, and then the consumable electrode is subjected to three vacuum consumable smelting to obtain a Ti-6.5Al-4.0V-0.12O titanium alloy ingot with a diameter of 520 mm; the three vacuum consumable smelting During the process: the current of the first vacuum consumable smelting is 6kA, the vacuum degree is not greater than 4Pa, the current of the second vacuum consumable smelting is 8kA, the vacuum degree is not greater than 0.6Pa, the current of the third vacuum consumable smelting The melting voltage is 15kA, the vacuum degree is not greater than 0.6Pa, and the melting voltage is 30V to 35V in the process of the vacuum consumable melting three times; the mass fraction of Fe in the titanium alloy ingot is not greater than 0.04%, and the mass fraction of C is not greater than 0.011%...
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