When forming a titanium tube, the influencing factors of process parameters on porous materials include particle size, particle size composition, pressure, etc. If you want to make a porous material with a large pore size and high permeability, you should choose a powder with a large particle size; vice versa. For the porous material, powder with a narrow particle size distribution should be used because of the arch bridge effect, which increases the porosity. Porous materials such as spherical powders are beneficial for improving the permeability. Process parameter pressure has a great influence on forming. As the forming pressure increases, the porosity and permeability of the product decrease.
When forming a titanium tube, the influencing factors of the process parameters on the dense material include particle size, particle size composition, pressure, etc. Contrary to porous materials, mixed powder is used in the preparation process, that is, powder with a wide particle size distribution is preferably pressed, and powder with a particle size of less than 150um (100 mesh) is often used. Such powder fine particles are easy to be pressed into the pores of coarse particles, and the compact is dense and the pseudo-density is large during pressing. If the surface of the powder particles is uneven and polygonal, it is advantageous for pressing. Pressure has an effect on forming, but the effect is not very significant. As the pressure increases, it helps to increase the density of the product and reduce the porosity of the product.
Titanium tube sintering is a process of forming loose or porous products into dense or porous products by metallurgical bonding at high temperature. Sintering achieves a strong combination of powder particles and alloys the mixed powder. The sintering temperature is usually lower than the melting point of the main component.
Introduction and process of titanium and titanium alloy powder