The Debinding Process In Titanium Alloy Metal Powder Injection Molding

In the titanium alloy metal powder metallurgy processing technology, de-binding process is a key step, especially in metal injection molding (MIM) technology. The purpose of the de-binding process is to remove the organic binder in the pressed green compact to facilitate the sintering process.
1. Solvent de-binding: The use of organic solvents is used to remove the solvent portion of the binder, which is typically performed at a certain temperature to improve de-binding efficiency.

2. Thermal de-binding: The thermal binder is removed by heating. Thermal de-binding is typically performed in a protective atmosphere to prevent powder oxidation.

3. Catalytic de-binding: The use of a catalyst accelerates the debinding process, which can reduce defects in the de-binding process and increase de-binding rate.

4. Two-step de-binding: Combining solvent de-binding and thermal de-binding, the solvent is used to remove most of the binder first, and then the remaining binder is removed by thermal de-binding. This method can effectively avoid the problems of green body deformation, micro-cracking, and low density.

5. Vacuum de-binding: De-binding in vacuum can reduce the limitation of gas flow and help remove organic matter more thoroughly, and can prevent powder oxidation.

6. Ultrasonic assisted de-binding: The use of ultrasound can improve de-binding efficiency, especially in solvent de-binding, where ultrasound can enhance the penetration ability of the solvent to the binder.

7. Microwave assisted de-binding: Microwave energy can accelerate the de-binding process by rapidly heating to remove the binder.