A vacuum heat treatment method for ultra-high toughness, medium strength and high plasticity tc32 titanium alloy parts
A technology of vacuum heat treatment and vacuum heat treatment furnace, which is applied in the field of metal material science and technology processing, can solve the problems that the fracture toughness and plasticity of parts cannot be further improved, cannot meet the use requirements, and cannot accurately control the cooling rate in different cooling stages, so as to improve the comprehensive Mechanical properties, ensuring the effect of precipitation and development
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Embodiment 1
[0022] Example 1: Heat treatment of key structural components of a certain type of aircraft, the phase transition point of the furnace TC32 titanium alloy is 912°C.
[0023] Step 1. Put the cleaned TC32 titanium alloy parts into the vacuum heat treatment furnace. The vacuum pressure in the vacuum furnace is not greater than 6.7×10 -2 Pa;
[0024] Step 2. Use a heating rate of 0.3°C / s to raise the temperature of the TC32 titanium alloy parts to 922°C with the furnace, and then keep it warm for 55 minutes;
[0025] Step 3. After the heat preservation is completed, cool down to 902°C with the furnace at a cooling rate of 120°C / s, and then keep heat for 30 minutes;
[0026] Step 4. After the heat preservation is completed, cool down to 520°C with the furnace at a cooling rate of 0.01°C / s, and then keep heat for 360 minutes, then leave the furnace for air cooling.
[0027] Table 1 shows the test results of the mechanical properties of the key structural components of a certain ty...
Embodiment 2
[0030] Example 2: heat treatment of key structural components of a certain type of aircraft, the phase transition point of the furnace TC32 titanium alloy is 915°C.
[0031] Step 1. Put the cleaned TC32 titanium alloy parts into the vacuum heat treatment furnace. The vacuum pressure in the vacuum furnace is not greater than 6.7×10 -2 Pa;
[0032] Step 2. Use a heating rate of 0.3°C / s to raise the temperature of the TC32 titanium alloy parts to 925°C with the furnace, and then keep it warm for 70 minutes;
[0033] Step 3. After the heat preservation is completed, cool down to 905°C with the furnace at a cooling rate of 150°C / s, and then keep heat for 30 minutes;
[0034] Step 4. After the heat preservation is completed, cool down to 540°C with the furnace at a cooling rate of 0.05°C / s, and then hold the heat. The soaking time of heat preservation is 360min.
[0035] Table 2 shows the test results of the mechanical properties of the key structural components of a certain type of...
Embodiment 3
[0038] Example 3: Heat treatment of key structural components of a certain type of aircraft, the phase transition point of the furnace TC32 titanium alloy is 910°C.
[0039] Step 1. Put the cleaned TC32 titanium alloy parts into the vacuum heat treatment furnace. The vacuum pressure in the vacuum furnace is not greater than 6.7×10 -2 Pa;
[0040] Step 2. Use a heating rate of 0.3°C / s to raise the temperature of the TC32 titanium alloy parts to 920°C with the furnace, and then keep it warm for 60 minutes;
[0041] Step 3. After the heat preservation is completed, cool down to 900°C with the furnace at a cooling rate of 80°C / s, and then keep heat for 30 minutes;
[0042] Step 4. After the heat preservation is completed, cool down to 500°C with the furnace at a cooling rate of 0.001°C / s, and then hold the heat. The soaking time of heat preservation is 360min.
[0043] Table 3 shows the test results of the mechanical properties of the key structural components of a certain type ...
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