Factors Affecting The Flow Of Titanium Rods During Extrusion

(1) Extrusion method: Reverse extrusion makes the metal flow more evenly than forward extrusion, cold extrusion makes the metal flow more evenly than hot extrusion, and lubricated extrusion makes the metal flow more evenly than unlubricated extrusion. The influence of the extrusion method is achieved through changes in friction conditions.
(2) Extrusion speed: As the extrusion speed increases, the unevenness of metal flow intensifies.

(3) Extrusion temperature: As the extrusion temperature increases and the deformation resistance of the billet decreases, the uneven flow of metal intensifies. During the extrusion process, if the heating temperature of the extrusion barrel and the die is too low and the temperature difference between the metal in the outer layer and the center layer is large, the unevenness of the metal flow will increase. The better the thermal conductivity of the metal, the more uniform the temperature distribution will be on the end face of the ingot.
(4) Metal strength: When other conditions are the same, the higher the metal strength, the more uniform the metal flow will be.

(5) Die angle: The larger the die angle (that is, the angle between the end face of the die and the central axis), the more uneven the metal fluidity will be. When a porous die is used for extrusion and the die holes are arranged reasonably, the metal flow tends to be uniform.

(6) Degree of deformation: If the degree of deformation is too large or too small, the metal flow will be uneven.