The company recently took on a chemical project and needed a batch of titanium tubes. The supplier said that they had done titanium tube vacuum annealing, but he still had no idea: "What is this vacuum annealing? Is it okay not to do it?" Let's talk about this today.
1. How important is vacuum annealing?
Let's put it this way: if titanium tubes are not vacuum annealed, they are like uncooked dumplings - they look good on the outside, but there are problems inside!
Eliminate internal injuries: "Internal injuries" will occur inside the titanium tube during processing, and annealing is to "massage" the tube
Improve toughness: The titanium tube vacuum annealing is like practicing yoga, soft when it should be soft, and hard when it should be hard
Rust and corrosion prevention: Just like applying a film to a mobile phone, protecting the tube from rust
Stable size: The size of the titanium tube is stable after vacuum annealing, and it will not deform during use
2. The secret of the annealing process
- Preparation work
Wash the tube first (degrease and decontamination)
Put it neatly in the furnace like a barbecue
Check the sealing of the furnace (leakage is all over)
- Key steps
Heating → Insulation → Cooling down
Just like cooking soup: first boil it over high heat, then simmer it over low heat, and finally let it cool naturally
- Temperature control
Ordinary titanium tube: about 750℃ (similar to baking pizza)
Special alloy: up to 900℃ (comparable to volcanic lava)
Keep warm for 2-3 hours (same as stewing beef)
Common problems
The tube turned black?
Reason: Insufficient vacuum, air leakage
Solution: Check the furnace seal, just like checking the rubber ring of a pressure cooker
Is the tube bent?
Reason: Heating too fast or stacking incorrectly
Solution: Heating slowly, don't stack the tubes too densely
Uneven hardness?
Reason: Uneven temperature
Solution: Turn it over frequently like a kebab
If you need titanium tube vacuum annealing service or process consultation, please feel free to contact us and provide professional solutions!
